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CONSOLIDATED STATEMENTS OF EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Treasury Stock
Retained Earnings
Noncontrolling Interest
Stock Options
Former Affiliated Entity
Additional Paid-in Capital
Former Affiliated Entity
Treasury Stock
Former Affiliated Entity
Stock Options
Beginning Balances at Dec. 31, 2013 $ 715,397 $ 36,947 $ 556,676 $ (34,196) $ 150,418 $ 5,552        
Beginning Balances, Shares at Dec. 31, 2013   36,946,603   (2,199,666)            
Net income 17,088       16,583 505        
Distributions to noncontrolling interest (4,171)         (4,171)        
Contributions from noncontrolling interest 2,585         2,585        
Dissolution of noncontrolling interests 1,342         1,342        
Purchase of noncontrolling interests, net (6,242)   (2,969)     (3,273)        
Issuances of common stock, Shares       164,914            
Issuances of common stock, Value (2,567)     $ 2,567            
Issuances from exercises of stock options, net of swaps, shares       45,062         60,823  
Issuances from exercises of stock options, net of swaps, Value 329   (333) $ 662       $ (43) $ 920 $ 877
Shares withheld for payroll taxes, Shares       (55,238)            
Shares withheld for payroll taxes, Value $ (1,043)   (4) $ (1,039)            
Shares repurchased, Shares (1,491,187)     (1,491,187)            
Shares repurchased, Value $ (24,595)     $ (24,595)            
Forfeitures of restricted stock, Shares       (9,986)            
Forfeitures of restricted stock, Value 0   10 $ (10)            
Share-based compensation 8,033   8,033              
Tax benefit from exercise of restricted stock units and stock options and vested restricted stock 142   142              
Ending Balances at Dec. 31, 2014 709,742 $ 36,947 558,945 $ (55,691) 167,001 2,540        
Ending Balances, Shares at Dec. 31, 2014   36,946,603   (3,485,278)            
Net income (212,371)       (213,047) 676        
Distributions to noncontrolling interest (701)         (701)        
Issuances of common stock, Shares       335,611            
Issuances of common stock, Value $ 0   (5,362) $ 5,362            
Issuances from exercises of stock options, net of swaps, shares                 3,999  
Issuances from exercises of stock options, net of swaps, Value               $ (33) $ 64 $ 31
Shares withheld for payroll taxes, Shares (51,521)     (51,521)            
Shares withheld for payroll taxes, Value $ (762)   (1) $ (761)            
Forfeitures of restricted stock, Shares       (6,579)            
Forfeitures of restricted stock, Value 0   125 $ (125)            
Share-based compensation 8,576   8,576              
Tax benefit from exercise of restricted stock units and stock options and vested restricted stock (400)   (400)              
Ending Balances at Dec. 31, 2015 504,115 $ 36,947 561,850 $ (51,151) (46,046) 2,515        
Ending Balances, Shares at Dec. 31, 2015   36,946,603   (3,203,768)            
Net income 60,179       58,648 1,531        
Distributions to noncontrolling interest (2,579)         (2,579)        
Issuances of common stock, Shares       288,397            
Issuances of common stock, Value 0   (4,570) $ 4,570            
Issuances from exercises of stock options, net of swaps, shares       35,406     35,000      
Issuances from exercises of stock options, net of swaps, Value $ 328   (224) $ 552            
Shares withheld for payroll taxes, Shares (25,082)     (23,312)            
Shares withheld for payroll taxes, Value $ (222)   (28) $ (194)            
Shares repurchased, Shares (283,976)     (283,976)            
Shares repurchased, Value $ (3,537)     $ (3,537)            
Share-based compensation 4,045   4,045              
Settlement of tangible equity units, Shares   7,857,000                
Settlement of tangible equity units, Value   $ 7,857 (7,857)              
Reacquisition of equity component related to convertible debt (211)   (211)              
Ending Balances at Dec. 31, 2016 $ 562,118 $ 44,804 $ 553,005 $ (49,760) $ 12,602 $ 1,467        
Ending Balances, Shares at Dec. 31, 2016   44,803,603   (3,187,253)