CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Restricted stock units	Cumulative effect of adoption	Adjusted balance	Common Stock	Common Stock Restricted stock units	Common Stock Adjusted balance	Additional Paid-in Capital	Additional Paid-in Capital Restricted stock units	Additional Paid-in Capital Adjusted balance	Retained Earnings	Retained Earnings Cumulative effect of adoption	Retained Earnings Adjusted balance	Treasury Stock	Treasury Stock Adjusted balance	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Adjusted balance
Balance, beginning of period (in shares) at Dec. 31, 2018					54,080,192
Balance, beginning of period at Dec. 31, 2018	$ 1,262,596				$ 54			$ 544,700			$ 759,533					$ (41,514)
Treasury stock, beginning of period (in shares) at Dec. 31, 2018														19,735
Treasury stock, beginning period at Dec. 31, 2018														$ (177)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures [Abstract]
Stock units vested (in shares)						242,414
Stock units withheld for employee taxes		$ (13,483)							$ (13,483)
Stock units withheld for employee taxes (in shares)						(81,562)
Proceeds from stock options exercises	11,890							11,890
Proceeds from stock options exercises (in shares)					323,464
Stock-based compensation expense	10,425							10,425
Foreign currency translation adjustments, net of tax	2,943															2,943
Change in unrealized gains and losses on cash flow hedges, net of tax	3,100															3,100
Net income	60,754										60,754
Balance, end of period (in shares) at Mar. 31, 2019					54,564,508
Balance, end of period at Mar. 31, 2019	1,338,225				$ 54			553,532			820,287					(35,471)
Treasury stock, end of period (in shares) at Mar. 31, 2019														19,735
Treasury stock, end of period at Mar. 31, 2019														$ (177)
Balance, beginning of period (in shares) at Dec. 31, 2018					54,080,192
Balance, beginning of period at Dec. 31, 2018	1,262,596				$ 54			544,700			759,533					(41,514)
Treasury stock, beginning of period (in shares) at Dec. 31, 2018														19,735
Treasury stock, beginning period at Dec. 31, 2018														$ (177)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures [Abstract]
Foreign currency translation adjustments, net of tax	5,563
Change in unrealized gains and losses on cash flow hedges, net of tax	4,637
Net income	119,531
Balance, end of period (in shares) at Jun. 30, 2019					54,779,289
Balance, end of period at Jun. 30, 2019	1,422,247				$ 55			574,619			879,064					(31,314)
Treasury stock, end of period (in shares) at Jun. 30, 2019														19,735
Treasury stock, end of period at Jun. 30, 2019														$ (177)
Balance, beginning of period (in shares) at Mar. 31, 2019					54,564,508
Balance, beginning of period at Mar. 31, 2019	1,338,225				$ 54			553,532			820,287					(35,471)
Treasury stock, beginning of period (in shares) at Mar. 31, 2019														19,735
Treasury stock, beginning period at Mar. 31, 2019														$ (177)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures [Abstract]
Stock units vested (in shares)						11,757
Stock units withheld for employee taxes		(363)							(363)
Stock units withheld for employee taxes (in shares)						(2,084)
Proceeds from stock options exercises	10,584				$ 1			10,583
Proceeds from stock options exercises (in shares)					205,108
Stock-based compensation expense	10,867							10,867
Foreign currency translation adjustments, net of tax	2,620															2,620
Change in unrealized gains and losses on cash flow hedges, net of tax	1,537															1,537
Net income	58,777										58,777
Balance, end of period (in shares) at Jun. 30, 2019					54,779,289
Balance, end of period at Jun. 30, 2019	$ 1,422,247				$ 55			574,619			879,064					(31,314)
Treasury stock, end of period (in shares) at Jun. 30, 2019														19,735
Treasury stock, end of period at Jun. 30, 2019														$ (177)
Balance, beginning of period (in shares) at Dec. 31, 2019	55,187,711				55,187,711		55,187,711
Balance, beginning of period at Dec. 31, 2019	$ 1,596,145			$ 1,596,275	$ 55		$ 55	607,051		$ 607,051	1,020,590		$ 1,020,720			(31,374)	$ (31,374)
Balance, beginning of period (ASU 2016-13) at Dec. 31, 2019			$ 130									$ 130
Treasury stock, beginning of period (in shares) at Dec. 31, 2019														19,735	19,735
Treasury stock, beginning period at Dec. 31, 2019														$ (177)	$ (177)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures [Abstract]
Stock units vested (in shares)						273,904
Stock units withheld for employee taxes		(15,822)							(15,822)
Stock units withheld for employee taxes (in shares)						(89,990)
Proceeds from stock options exercises	7,141				$ 1			7,140
Proceeds from stock options exercises (in shares)					217,475
Stock-based compensation expense	12,210							12,210
Foreign currency translation adjustments, net of tax	(28,519)															(28,519)
Change in unrealized gains and losses on cash flow hedges, net of tax	(9,368)															(9,368)
Net income	85,565										85,565
Balance, end of period (in shares) at Mar. 31, 2020					55,589,100
Balance, end of period at Mar. 31, 2020	$ 1,647,482				$ 56			610,579			1,106,285					(69,261)
Treasury stock, end of period (in shares) at Mar. 31, 2020														19,735
Treasury stock, end of period at Mar. 31, 2020														$ (177)
Balance, beginning of period (in shares) at Dec. 31, 2019	55,187,711				55,187,711		55,187,711
Balance, beginning of period at Dec. 31, 2019	$ 1,596,145			$ 1,596,275	$ 55		$ 55	607,051		$ 607,051	1,020,590		$ 1,020,720			(31,374)	$ (31,374)
Balance, beginning of period (ASU 2016-13) at Dec. 31, 2019			$ 130									$ 130
Treasury stock, beginning of period (in shares) at Dec. 31, 2019														19,735	19,735
Treasury stock, beginning period at Dec. 31, 2019														$ (177)	$ (177)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures [Abstract]
Foreign currency translation adjustments, net of tax	(16,077)
Change in unrealized gains and losses on cash flow hedges, net of tax	(2,922)
Net income	$ 152,189
Balance, end of period (in shares) at Jun. 30, 2020	55,825,951				55,825,951
Balance, end of period at Jun. 30, 2020	$ 1,753,094				$ 56			630,679			1,172,909					(50,373)
Treasury stock, end of period (in shares) at Jun. 30, 2020														19,735
Treasury stock, end of period at Jun. 30, 2020														$ (177)
Balance, beginning of period (in shares) at Mar. 31, 2020					55,589,100
Balance, beginning of period at Mar. 31, 2020	1,647,482				$ 56			610,579			1,106,285					(69,261)
Treasury stock, beginning of period (in shares) at Mar. 31, 2020														19,735
Treasury stock, beginning period at Mar. 31, 2020														$ (177)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures [Abstract]
Stock units vested (in shares)						18,649
Stock units withheld for employee taxes		$ (1,169)							$ (1,169)
Stock units withheld for employee taxes (in shares)						(5,522)
Proceeds from stock options exercises	10,116							10,116
Proceeds from stock options exercises (in shares)					223,724
Stock-based compensation expense	11,153							11,153
Foreign currency translation adjustments, net of tax	12,442															12,442
Change in unrealized gains and losses on cash flow hedges, net of tax	6,446															6,446
Net income	$ 66,624										66,624
Balance, end of period (in shares) at Jun. 30, 2020	55,825,951				55,825,951
Balance, end of period at Jun. 30, 2020	$ 1,753,094				$ 56			$ 630,679			$ 1,172,909					$ (50,373)
Treasury stock, end of period (in shares) at Jun. 30, 2020														19,735
Treasury stock, end of period at Jun. 30, 2020														$ (177)