Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Restatement (Details)

v2.4.0.8
Summary of Significant Accounting Policies - Restatement (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Total revenue $ 161,648,813 $ 163,906,205 $ 398,037,030 $ 474,579,479  
Direct expenses 131,584,983 129,103,909 323,071,753 379,395,512  
Operating expenses 22,481,867 24,092,961 71,374,831 72,791,218  
Total expenses   153,196,870   452,186,730  
Operating income 7,581,963 10,709,335 3,590,446 22,392,749  
Other expenses, net 1,589,360 1,313,278 2,502,405 3,833,761  
Income before provision for income taxes 5,992,603 9,396,057 1,088,041 18,558,988  
Income tax provision 1,447,486 2,683,936 247,747 5,292,453  
Net income 4,545,117 6,712,121 840,294 13,266,535 13,266,535
Basic (in usd per share) $ 0.10 $ 0.15 $ 0.02 $ 0.30  
Diluted (in usd per share) $ 0.10 $ 0.15 $ 0.02 $ 0.29  
Basic (in shares) 45,621,552 44,788,160 45,472,517 44,492,509  
Diluted (in shares) 46,605,360 46,247,239 46,390,468 46,010,138  
As Reported [Member]
          
Total revenue   163,906,205   474,579,479  
Direct expenses   129,103,909   379,395,512  
Operating expenses   24,092,961   72,791,218  
Total expenses   153,196,870   452,186,730  
Operating income   10,709,335   22,392,749  
Other expenses, net   1,254,217   3,654,948  
Income before provision for income taxes   9,455,118   18,737,801  
Income tax provision   2,683,936   5,292,453  
Net income   6,771,182   13,445,348  
Basic (in usd per share)   $ 0.15   $ 0.30  
Diluted (in usd per share)   $ 0.15   $ 0.29  
Basic (in shares)   44,788,160   44,492,509  
Diluted (in shares)   46,247,239   46,010,138  
Restatement [Member]
          
Total revenue   0   0  
Direct expenses   0   0  
Operating expenses   0   0  
Total expenses   0   0  
Operating income   0   0  
Other expenses, net   59,061   178,813  
Income before provision for income taxes   (59,061)   (178,813)  
Income tax provision   0   0  
Net income   $ (59,061)   $ (178,813)  
Basic (in usd per share)   $ 0.00   $ 0.00  
Diluted (in usd per share)   $ 0.00   $ 0.00  
Basic (in shares)   44,788,160   44,492,509  
Diluted (in shares)   46,247,239   46,010,138