Annual report pursuant to Section 13 and 15(d)

Unaudited Quarterly Information (Details)

v2.4.0.6
Unaudited Quarterly Information (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Net revenues $ 156,591 $ 163,906 $ 164,100 $ 146,573 $ 188,494 $ 227,804 $ 165,482 $ 146,420 $ 179,342 $ 191,901 $ 141,355 $ 105,629 $ 631,170,565 $ 728,200,318 $ 618,226,659
Direct expenses 123,628 129,104 132,942 117,349 153,439 187,948 133,330 118,437 148,073 157,021 115,201 87,230 354,855,706 446,962,891 378,084,610
Operating expenses 26,699 24,093 22,899 25,799 22,439 23,447 18,794 19,680 18,766 15,967 14,140 15,836 99,490,275 84,360,323 64,710,123
Total expenses 150,327 153,197 155,841 143,148 175,878 211,395 152,124 138,117 166,839 172,988 129,341 103,066      
Operating income 6,264 10,709 8,259 3,425 12,616 16,409 13,358 8,303 12,503 18,913 12,014 2,563 28,657,002 50,685,824 45,992,297
Other expenses, net 216 1,313 1,413 1,108 1,748 2,696 1,431 631 (185) 2,751 2,371 1,356 4,050,116 6,505,719 6,292,996
Income before provision for income taxes 6,048 9,396 6,846 2,317 10,868 13,713 11,927 7,672 12,688 16,162 9,643 1,207 24,606,886 44,180,105 39,699,301
Income tax provision 954 2,684 2,027 582 2,425 2,690 3,537 2,115 3,805 4,862 3,089 429 6,246,753 10,767,172 12,185,635
Net income 5,094 6,712 4,819 1,735 8,443 11,023 8,390 5,557 8,883 11,300 6,554 778 18,360,133 33,412,933 27,513,666
Net income per share attributable to common shareholders:                              
Basic (in usd per share) $ 0.11 $ 0.15 $ 0.11 $ 0.04 $ 0.19 $ 0.26 $ 0.20 $ 0.13 $ 0.22 $ 0.33 $ 0.48 $ 0.06 $ 0.41 $ 0.78 $ 1.07
Diluted (in usd per share) $ 0.11 $ 0.15 $ 0.10 $ 0.04 $ 0.19 $ 0.24 $ 0.18 $ 0.12 $ 0.19 $ 0.26 $ 0.17 $ 0.02 $ 0.40 $ 0.75 $ 0.66
Weighted average common shares outstanding:                              
Basic (in shares) 45,116,164 44,788,160 44,541,025 44,145,093 43,514,982 43,116,861 42,367,242 41,322,276 41,086,998 34,434,352 13,742,472 13,282,284 44,649,275 42,587,818 25,728,314
Diluted (in shares) 46,508,767 46,247,239 46,359,323 46,128,417 45,554,558 46,308,032 45,907,748 45,823,090 46,147,728 43,445,391 38,412,419 36,587,847 45,995,463 44,707,132 41,513,482
As Reported
                              
Net revenues   163,906 164,100 146,573 188,494 227,804 165,482 146,420 179,342 191,901 141,355 105,629      
Direct expenses   129,104 132,942 117,349 153,439 187,948 133,330 118,437 148,073 157,021 115,201 87,230      
Operating expenses   24,093 22,899 25,799 22,439 23,447 18,794 19,680 18,766 15,967 14,140 15,836      
Total expenses   153,197 155,841 143,148 175,878 211,395 152,124 138,117 166,839 172,988 129,341 103,066      
Operating income   10,709 8,259 3,425 12,616 16,409 13,358 8,303 12,503 18,913 12,014 2,563   50,685,824 45,992,297
Other expenses, net   1,254 1,063 1,338 1,943 1,360 989 900 998 2,010 1,217 856   5,192,132 5,080,546
Income before provision for income taxes   9,455 7,196 2,087 10,673 15,049 12,369 7,403 11,505 16,903 10,797 1,707   45,493,692 40,911,751
Income tax provision   2,684 2,027 582 2,425 2,690 3,537 2,115 3,805 4,862 3,089 429   10,767,172 12,185,635
Net income   6,771 5,169 1,505 8,248 12,359 8,832 5,288 7,700 12,041 7,708 1,278   34,726,520 28,726,116
Net income per share attributable to common shareholders:                              
Basic (in usd per share)   $ 0.15 $ 0.12 $ 0.03 $ 0.19 $ 0.29 $ 0.21 $ 0.13 $ 0.19 $ 0.35 $ 0.56 $ 0.10   $ 0.82 $ 1.12
Diluted (in usd per share)   $ 0.15 $ 0.11 $ 0.03 $ 0.18 $ 0.27 $ 0.19 $ 0.12 $ 0.17 $ 0.28 $ 0.20 $ 0.03   $ 0.78 $ 0.69
Weighted average common shares outstanding:                              
Basic (in shares)   44,788,160 44,541,025 44,145,093 43,514,982 43,116,861 42,367,242 41,322,276 41,086,998 34,434,352 13,742,472 13,282,284      
Diluted (in shares)   46,247,239 46,359,323 46,128,417 45,554,558 46,308,032 45,907,748 45,823,090 46,147,728 43,445,391 38,412,419 36,587,847      
Restatement
                              
Net revenues   0 0 0 0 0 0 0 0 0 0 0      
Direct expenses   0 0 0 0 0 0 0 0 0 0 0      
Operating expenses   0 0 0 0 0 0 0 0 0 0 0      
Total expenses   0 0 0 0 0 0 0 0 0 0 0      
Operating income   0 0 0 0 0 0 0 0 0 0 0   0 0
Other expenses, net   59 350 (230) (195) 1,336 442 (269) (1,183) 741 1,154 500   1,313,587 1,212,450
Income before provision for income taxes   (59) (350) 230 195 (1,336) (442) 269 1,183 (741) (1,154) (500)   (1,313,587) (1,212,450)
Income tax provision   0 0 0 0 0 0 0 0 0 0 0   0 0
Net income   $ (59) $ (350) $ 230 $ 195 $ (1,336) $ (442) $ 269 $ 1,183 $ (741) $ (1,154) $ (500)   $ (1,313,587) $ (1,212,450)
Net income per share attributable to common shareholders:                              
Basic (in usd per share)   $ 0.00 $ (0.01) $ 0.01 $ 0.00 $ (0.03) $ (0.01)   $ 0.03 $ (0.02) $ (0.08) $ (0.04)   $ (0.03) $ (0.05)
Diluted (in usd per share)   $ 0.00 $ (0.01) $ 0.01   $ (0.03) $ (0.01)     $ (0.02) $ (0.03) $ (0.01)   $ (0.03) $ (0.03)
Weighted average common shares outstanding:                              
Basic (in shares)   44,788,160 44,541,025 44,145,093 43,514,982 43,116,861 42,367,242 41,322,276 41,086,998 34,434,352 13,742,472 13,282,284      
Diluted (in shares)   46,247,239 46,359,323 46,128,417 45,554,558 46,308,032 45,907,748 45,823,090 46,147,728 43,445,391 38,412,419 36,587,847