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UNAUDITED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss), Net of Taxes [Member]
Non-controlling Interest in Subsidiaries [Member]
Beginning Balance at Dec. 31, 2015 $ 854,638 $ 1,248 $ 526,148 $ 325,929 $ (1,763) $ 3,076
Beginning Balance (in shares) at Dec. 31, 2015   124,774,516        
Net income (loss) (198,419)     (198,709)   290
Repurchase of common stock (5,890) $ (10) (5,880)      
Repurchase of common stock (in shares)   (991,985)        
Exercise of common stock options 442 $ 1 441      
Exercise of common stock options (in shares)   69,805        
Equity-based compensation and other 3,345 $ 1 3,344      
Equity-based compensation and other (in shares)   134,618        
Capital distribution to non-controlling interest (1,138)         (1,138)
Other comprehensive income, net of income taxes 174       174  
Ending Balance at Jun. 30, 2016 653,152 $ 1,240 524,053 127,220 (1,589) 2,228
Ending Balance (in shares) at Jun. 30, 2016   123,986,954        
Beginning Balance at Dec. 31, 2016 $ 655,283 $ 1,240 527,001 126,167 (1,450) 2,325
Beginning Balance (in shares) at Dec. 31, 2016 123,988,160 123,988,160        
Net income (loss) $ (77,059)     (77,231)   172
Cumulative effect of adoption of FASB Accounting Standards Update No. 2016-09 0   284 (284)    
Equity-based compensation and other 1,911 $ 8 1,903      
Equity-based compensation and other (in shares)   790,388        
Other comprehensive income, net of income taxes 112       112  
Ending Balance at Jun. 30, 2017 $ 580,247 $ 1,248 $ 529,188 $ 48,652 $ (1,338) $ 2,497
Ending Balance (in shares) at Jun. 30, 2017 124,778,548 124,778,548