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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Treasury Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2017   68,791 25,987      
Beginning balance at Dec. 31, 2017 $ 185,865 $ 95 $ (334,312) $ 373,045 $ 190,431 $ (43,394)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Share-based compensation 9,040     9,040    
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units (in shares)   1,184 37      
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units 31 $ 1 $ 251 (221)    
Repurchases of common stock (in shares)   (2,381) (2,381)      
Repurchases of common stock (37,046)   $ (37,046)      
Series A convertible preferred stock dividends (9,000)       (9,000)  
Series A convertible preferred stock accretion (2,854)       (2,854)  
Net income 61,323       61,323  
Other comprehensive income (loss) (11,552)         (11,552)
Other 1,226     1,226    
Ending balance (in shares) at Sep. 30, 2018   67,594 28,405      
Ending balance at Sep. 30, 2018 197,033 $ 96 $ (371,107) 383,090 239,900 (54,946)
Beginning balance (in shares) at Jun. 30, 2018   68,109 27,802      
Beginning balance at Jun. 30, 2018 198,226 $ 96 $ (360,032) 379,571 233,380 (54,789)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Share-based compensation 3,305     3,305    
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units (in shares)   89 1      
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units 239   $ 25 214    
Repurchases of common stock (in shares)   (604) (604)      
Repurchases of common stock (11,100)   $ (11,100)      
Series A convertible preferred stock dividends (3,000)       (3,000)  
Series A convertible preferred stock accretion (972)       (972)  
Net income 10,492       10,492  
Other comprehensive income (loss) (157)         (157)
Ending balance (in shares) at Sep. 30, 2018   67,594 28,405      
Ending balance at Sep. 30, 2018 197,033 $ 96 $ (371,107) 383,090 239,900 (54,946)
Beginning balance (in shares) at Dec. 31, 2018   73,306 29,656      
Beginning balance at Dec. 31, 2018 150,308 $ 103 $ (397,491) 481,133 121,215 (54,652)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Share-based compensation 11,020     11,020    
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units (in shares)   984 50      
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units (1,007) $ 1 $ (1,254) 246    
Repurchases of common stock (in shares)   (5,687) (5,687)      
Repurchases of common stock (133,475)   $ (133,475)      
Net income 99,584       99,584  
Other comprehensive income (loss) (8,679)         (8,679)
Ending balance (in shares) at Sep. 30, 2019   68,603 35,393      
Ending balance at Sep. 30, 2019 117,524 $ 104 $ (532,220) 492,399 220,572 (63,331)
Beginning balance (in shares) at Jun. 30, 2019   69,615 34,350      
Beginning balance at Jun. 30, 2019 111,936 $ 104 $ (507,193) 488,730 184,896 (54,601)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Share-based compensation 3,619     3,619    
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units (in shares)   30 1      
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units 23   $ (27) 50    
Repurchases of common stock (in shares)   (1,042) (1,042)      
Repurchases of common stock (25,000)   $ (25,000)      
Net income 35,676       35,676  
Other comprehensive income (loss) (8,730)         (8,730)
Ending balance (in shares) at Sep. 30, 2019   68,603 35,393      
Ending balance at Sep. 30, 2019 $ 117,524 $ 104 $ (532,220) $ 492,399 $ 220,572 $ (63,331)