Summary of Significant Accounting Policies - Balance Sheet Restatement (Details) (USD $)
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Stockholders’ equity: | ||||
Preferred stock | $ 0 | $ 0 | $ 0 | |
Additional paid-in capital | 93,141,432 | 86,067,852 | 74,069,087 | |
Retained earnings | 177,169,717 | 158,809,584 | 125,396,651 | |
Accumulated other comprehensive (loss) income | 713,194 | 657,685 | 4,763,971 | |
Non-controlling interest | (27,583) | 63,614 | 0 | |
Less — treasury stock, at cost | (9,182,571) | (9,182,571) | (9,182,571) | |
Total stockholders’ equity | 261,819,191 | 236,421,035 | 195,051,731 | 102,769,787 |
As Reported
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Stockholders’ equity: | ||||
Preferred stock | 0 | 0 | ||
Additional paid-in capital | 86,067,852 | 74,069,087 | ||
Retained earnings | 161,335,621 | 126,609,101 | ||
Accumulated other comprehensive (loss) income | (1,868,352) | 3,551,521 | ||
Non-controlling interest | 63,614 | 0 | ||
Less — treasury stock, at cost | (9,182,571) | (9,182,571) | ||
Total stockholders’ equity | 236,421,035 | 195,051,731 | ||
Adjustment
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Stockholders’ equity: | ||||
Preferred stock | 0 | 0 | ||
Additional paid-in capital | 0 | 0 | ||
Retained earnings | (2,526,037) | (1,212,450) | ||
Accumulated other comprehensive (loss) income | 2,526,037 | 1,212,450 | ||
Non-controlling interest | 0 | 0 | ||
Less — treasury stock, at cost | 0 | 0 | ||
Total stockholders’ equity | 0 | 0 | ||
Class A Common Stock
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Stockholders’ equity: | ||||
Common stock | 3,202 | 3,071 | 2,793 | |
Class A Common Stock | As Reported
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Stockholders’ equity: | ||||
Common stock | 3,071 | 2,793 | ||
Class A Common Stock | Adjustment
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Stockholders’ equity: | ||||
Common stock | 0 | 0 | ||
Class B Common Stock
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Stockholders’ equity: | ||||
Common stock | 1,800 | 1,800 | 1,800 | |
Class B Common Stock | As Reported
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Stockholders’ equity: | ||||
Common stock | 1,800 | 1,800 | ||
Class B Common Stock | Adjustment
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Stockholders’ equity: | ||||
Common stock | $ 0 | $ 0 |
X | ||||||||||
- Definition
Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Value of all classes of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares exclude common shares repurchased by the entity and held as treasury shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Value of all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by shareholders, which is net of related treasury stock. May be all or a portion of the number of preferred shares authorized. These shares represent the ownership interest of the preferred shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Details
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X | ||||||||||
- Definition
The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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