Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect of Accounting Change Due to Adoption of ASU	Common Stock	Paid-in Capital	AOCI Attributable to Parent	AOCI Attributable to Parent Cumulative Effect of Accounting Change Due to Adoption of ASU	Retained Earnings	Retained Earnings Cumulative Effect of Accounting Change Due to Adoption of ASU
Beginning Balance at Dec. 31, 2017	$ 553,874		$ 265,048	$ 15,625	$ (20,444)		$ 293,645
Beginning Balance (ASU 2014-09) at Dec. 31, 2017		$ (3,264)						$ (3,264)
Beginning Balance (ASU 2016-16) at Dec. 31, 2017		31,645						31,645
Beginning Balance (ASU 2018-02) at Dec. 31, 2017						$ (40)		40
Beginning Balance (in shares) at Dec. 31, 2017			36,761,000
Net income	41,899						41,899
Other comprehensive income (loss)	(19,056)
Other comprehensive loss	(19,016)				(19,016)
Stock compensation, net	22,635		$ 23,326	(691)
Stock repurchase	(148,074)		$ (148,074)
Stock repurchase (in shares)			(3,470,000)
Ending Balance at Dec. 31, 2018	479,699		$ 140,300	14,934	(39,500)		363,965
Ending Balance (ASU 2016-02) at Dec. 31, 2018		$ 261						$ 261
Ending Balance (in shares) at Dec. 31, 2018			33,857,000
Stock compensation, net, shares			566,000
Net income	48,866						48,866
Other comprehensive income (loss)	(2,855)				(2,855)
Stock compensation, net	21,408		$ 25,490	(4,082)
Stock repurchase	(63,283)		$ (63,283)
Stock repurchase (in shares)			(1,595,000)
Ending Balance at Dec. 31, 2019	$ 484,096		$ 102,507	10,852	(42,355)		413,092
Ending Balance (in shares) at Dec. 31, 2019	32,674,354		32,674,000
Stock compensation, net, shares			412,000
Net income	$ 59,690						59,690
Other comprehensive income (loss)	27,373				27,373
Stock compensation, net	24,264		$ 27,658	(3,394)
Stock repurchase	(9,092)		$ (9,092)
Stock repurchase (in shares)			(246,000)
Ending Balance at Dec. 31, 2020	$ 586,331		$ 121,073	$ 7,458	$ (14,982)		$ 472,782
Ending Balance (in shares) at Dec. 31, 2020	32,921,341		32,921,000
Stock compensation, net, shares			493,000