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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (USD $)
In Thousands, except Share data
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interest [Member]
Total
Balance at at Dec. 31, 2010 $ 1,007 $ 467,500 $ 445,456 $ (9,392) $ 246 $ 904,817
Balance at (in Shares) at Dec. 31, 2010 100,726,947          
Net income (loss)     22,074   (10) 22,064
Exercise of common stock options 2 577       579
Exercise of common stock options (in Shares) 210,336          
Equity-based compensation   886       886
Other comprehensive income, net of income taxes       2,111 10 2,121
Balance at at Mar. 31, 2011 1,009 468,963 467,530 (7,281) 246 930,467
Balance at (in Shares) at Mar. 31, 2011 100,937,283          
Balance at at Dec. 31, 2011           1,343,311
Balance at (in Shares) at Dec. 31, 2011           129,899,288
Net income (loss)     19,349     19,349
Conversion of 3.25% Convertible Notes 46 56,364       56,410
Conversion of 3.25% Convertible Notes (in Shares) 4,635,159          
Exercise of common stock options 3 1,016       1,019
Exercise of common stock options (in Shares) 313,028          
Equity-based compensation   2,850       2,850
Other comprehensive income, net of income taxes       3,074   3,074
Balance at at Mar. 31, 2012 $ 1,348 $ 886,351 $ 543,136 $ (4,822)   $ 1,426,013
Balance at (in Shares) at Mar. 31, 2012 134,847,475         134,847,475