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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings [Member]
Noncontrolling Interest [Member]
Balance, Stockholders Equity at Dec. 31, 2013 $ 372,479 $ 33 $ 467,890 $ (18,176) $ 15 $ (77,561) $ 278
Balance (in shares) at Dec. 31, 2013   33,413,970          
Issuance of stock - employee stock purchase plan 2,433 $ 0 2,433 0 0 0 0
Issuance of stock - employee stock purchase plan (in shares)   176,796          
Issuance of stock - 401 (k) plan 7,062 $ 1 7,061 0 0 0 0
Issuance of stock - 401 (k) plan (in shares)   430,919          
Exercise of stock options 564 $ 0 564 0 0 0 0
Exercise of stock options (in shares)   28,229          
Issuance/(cancellation) of non-vested stock 0 $ 1 (1) 0 0 0 0
Issuance/(cancellation) of non-vested stock (in shares)   519,612          
Non-cash compensation 5,597 $ 0 5,597 0 0 0 0
Tax deficit from stock options exercised and restricted stock vesting (579) 0 (579) 0 0 0 0
Surrendered shares (1,684) 0 0 (1,684) 0 0 0
Sale of noncontrolling interest (1,549) 0 (493) 0 0 0 (1,056)
Decrease in noncontrolling interest 350 0 (710) 0 0 0 1,060
Assets contributed to equity investment 0            
Net income (loss) 13,089 0 0 0 0 12,776 313
Other comprehensive income (loss) 0            
Balance, Stockholders Equity at Dec. 31, 2014 397,762 $ 35 481,762 (19,860) 15 (64,785) 595
Balance (in shares) at Dec. 31, 2014   34,569,526          
Issuance of stock - employee stock purchase plan 2,204 $ 0 2,204 0 0 0 0
Issuance of stock - employee stock purchase plan (in shares)   79,323          
Issuance of stock - 401 (k) plan 6,032 $ 0 6,032 0 0 0 0
Issuance of stock - 401 (k) plan (in shares)   184,412          
Exercise of stock options 399 $ 0 399 0 0 0 0
Exercise of stock options (in shares)   15,380          
Issuance/(cancellation) of non-vested stock 0 $ 0 0 0 0 0 0
Issuance/(cancellation) of non-vested stock (in shares)   (61,675)          
Non-cash compensation 11,824 $ 0 11,824 0 0 0 0
Tax benefit from stock options exercised and restricted stock vesting 2,073 0 2,073 0 0 0 0
Tax deficit from stock options exercised and restricted stock vesting (4) 0 (4) 0 0 0 0
Surrendered shares (2,525) 0 0 (2,525) 0 0 0
Shares repurchased (4,581) 0 0 (4,581) 0 0 0
Noncontrolling interest distribution (436) 0 0 0 0 0 (436)
Assets contributed to equity investment 0            
Net income (loss) (2,312) 0 0 0 0 (3,021) 709
Other comprehensive income (loss) 0            
Balance, Stockholders Equity at Dec. 31, 2015 410,436 $ 35 504,290 (26,966) 15 (67,806) 868
Balance (in shares) at Dec. 31, 2015   34,786,966          
Issuance of stock - employee stock purchase plan $ 2,483 $ 0 2,483 0 0 0 0
Issuance of stock - employee stock purchase plan (in shares) 3,039,200 63,688          
Issuance of stock - 401 (k) plan $ 6,682 $ 0 6,682 0 0 0 0
Issuance of stock - 401 (k) plan (in shares)   145,660          
Issuance/(cancellation) of non-vested stock 0 $ 0 0 0 0 0 0
Issuance/(cancellation) of non-vested stock (in shares)   257,263          
Non-cash compensation 16,401 $ 0 16,401 0 0 0 0
Tax benefit from stock options exercised and restricted stock vesting 7,241 0 7,241 0 0 0 0
Surrendered shares (7,493) 0 0 (7,493) 0 0 0
Shares repurchased (12,315) 0 0 (12,315) 0 0 0
Noncontrolling interest distribution (329) 0 0 0 0 0 (329)
Assets contributed to equity investment 405 0 375 0 0 0 30
Net income (loss) 37,631 0 0 0 0 37,261 370
Other comprehensive income (loss) 0            
Balance, Stockholders Equity at Dec. 31, 2016 $ 461,142 $ 35 $ 537,472 $ (46,774) $ 15 $ (30,545) $ 939
Balance (in shares) at Dec. 31, 2016   35,253,577