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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) (188,945)     (189,318)   373
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 4,017 $ 1 4,016      
Equity-based compensation and other (in shares)   137,618        
Capital distribution to non-controlling interest (1,138)         (1,138)
Other comprehensive income, net of income taxes 263       263  
Ending Balance at Sep. 30, 2016 663,387 $ 1,240 524,725 136,611 (1,500) 2,311
Ending Balance (in shares) at Sep. 30, 2016   123,989,954        
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) $ (83,194)     (83,483)   289
Issuance of common stock 13,913 $ 61 13,852      
Issuance of common stock (in shares)   6,075,510        
Cumulative effect of adoption of FASB Accounting Standards Update No. 2016-09     284 (284)    
Equity-based compensation and other 3,263 $ 8 3,255      
Equity-based compensation and other (in shares)   795,388        
Other comprehensive income, net of income taxes 157       157  
Ending Balance at Sep. 30, 2017 $ 589,422 $ 1,309 $ 544,392 $ 42,400 $ (1,293) $ 2,614
Ending Balance (in shares) at Sep. 30, 2017 130,859,058 130,859,058