Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	$ 638,990		$ 488	$ 452,730	$ (100,438)	$ 286,059		$ 151
Beginning balance (in shares) at Dec. 31, 2018			48,809		2,166
Beginning balance at Dec. 31, 2018	638,990		$ 488	452,730	$ (100,438)	286,059		151
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock into treasury (in shares)					378
Repurchase of common stock into treasury	(17,930)				$ (17,930)
Equity awards vested and exercised, net of shares withheld for payroll taxes (in shares)			313
Equity awards vested and exercised, net of shares withheld for payroll taxes	(10,281)		$ 3	(10,284)
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	649,986		$ 491	447,632	$ (118,368)	320,181		50
Share-based compensation	5,186			5,186
Comprehensive income (loss)	34,021					34,122		(101)
Ending balance (in shares) at Mar. 31, 2019			49,122		2,544
Ending balance at Mar. 31, 2019	649,986		$ 491	447,632	$ (118,368)	320,181		50
Beginning balance (in shares) at Dec. 31, 2018			48,809		2,166
Beginning balance at Dec. 31, 2018	638,990		$ 488	452,730	$ (100,438)	286,059		151
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	680,440		$ 492	450,080	$ (119,143)	349,050		(39)
Comprehensive income (loss)	62,801
Ending balance (in shares) at Jun. 30, 2019			49,223		2,561
Ending balance at Jun. 30, 2019	680,440		$ 492	450,080	$ (119,143)	349,050		(39)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	649,986		$ 491	447,632	$ (118,368)	320,181		50
Beginning balance (in shares) at Mar. 31, 2019			49,122		2,544
Beginning balance at Mar. 31, 2019	649,986		$ 491	447,632	$ (118,368)	320,181		50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock into treasury (in shares)					17
Repurchase of common stock into treasury	(775)				$ (775)
Equity awards vested and exercised, net of shares withheld for payroll taxes (in shares)			101
Equity awards vested and exercised, net of shares withheld for payroll taxes	(1,253)		$ 1	(1,254)
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	680,440		$ 492	450,080	$ (119,143)	349,050		(39)
Share-based compensation	3,702			3,702
Comprehensive income (loss)	28,780					28,869		(89)
Ending balance (in shares) at Jun. 30, 2019			49,223		2,561
Ending balance at Jun. 30, 2019	680,440		$ 492	450,080	$ (119,143)	349,050		(39)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	680,440		492	450,080	(119,143)	349,050		(39)
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	736,742	$ (1,154)	$ 493	455,193	$ (119,143)	400,047	$ (1,154)	152
Beginning balance (in shares) at Dec. 31, 2019			49,283		2,561
Beginning balance at Dec. 31, 2019	736,742	(1,154)	$ 493	455,193	$ (119,143)	400,047	(1,154)	152
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards vested and exercised, net of shares withheld for payroll taxes (in shares)			140
Equity awards vested and exercised, net of shares withheld for payroll taxes	(4,353)		$ 1	(4,354)
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	749,080	(1,154)	$ 494	455,766	$ (119,143)	411,858	(1,154)	105
Share-based compensation	4,927			4,927
Comprehensive income (loss)	12,918					12,965		(47)
Ending balance (in shares) at Mar. 31, 2020			49,423		2,561
Ending balance at Mar. 31, 2020	749,080		$ 494	455,766	$ (119,143)	411,858		105
Beginning balance (in shares) at Dec. 31, 2019			49,283		2,561
Beginning balance at Dec. 31, 2019	736,742	(1,154)	$ 493	455,193	$ (119,143)	400,047	(1,154)	152
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	736,742	$ (1,154)	$ 495	461,824	$ (119,143)	434,183	$ (1,154)	47
Comprehensive income (loss)	35,185
Ending balance (in shares) at Jun. 30, 2020			49,542		2,561
Ending balance at Jun. 30, 2020	777,406		$ 495	461,824	$ (119,143)	434,183		47
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	749,080		$ 494	455,766	$ (119,143)	411,858		105
Beginning balance (in shares) at Mar. 31, 2020			49,423		2,561
Beginning balance at Mar. 31, 2020	749,080		$ 494	455,766	$ (119,143)	411,858		105
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards vested and exercised, net of shares withheld for payroll taxes (in shares)			119
Equity awards vested and exercised, net of shares withheld for payroll taxes	(288)		$ 1	(289)
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	749,080		$ 495	461,824	$ (119,143)	434,183		47
Share-based compensation	6,347			6,347
Comprehensive income (loss)	22,267					22,325		(58)
Ending balance (in shares) at Jun. 30, 2020			49,542		2,561
Ending balance at Jun. 30, 2020	777,406		$ 495	461,824	$ (119,143)	434,183		47
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of the credit loss standard, net of tax	$ 777,406		$ 495	$ 461,824	$ (119,143)	$ 434,183		$ 47