Consolidated Condensed Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect of Accounting Change Due to Adoption of ASU 2016-02	Common Stock	Paid-in Capital	AOCI Attributable to Parent	Retained Earnings	Retained Earnings Cumulative Effect of Accounting Change Due to Adoption of ASU 2016-02
Beginning Balance at Dec. 31, 2018	$ 479,699	$ 261	$ 140,300	$ 14,934	$ (39,500)	$ 363,965	$ 261
Beginning Balance (in shares) at Dec. 31, 2018			33,857,000
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201602Member
Net income	8,414					8,414
Other comprehensive income (loss)	(3,652)				(3,652)
Stock compensation, net	1,805		$ 2,226	(421)
Stock repurchase	(8,040)		$ (8,040)
Stock repurchase (in shares)			(200,000)
Ending Balance at Mar. 31, 2019	478,487		$ 134,486	14,513	(43,152)	372,640
Ending Balance (in shares) at Mar. 31, 2019			33,653,000
Beginning Balance at Dec. 31, 2018	479,699	$ 261	$ 140,300	14,934	(39,500)	363,965	$ 261
Beginning Balance (in shares) at Dec. 31, 2018			33,857,000
Net income	27,052
Other comprehensive income (loss)	(15,314)
Ending Balance at Sep. 30, 2019	451,593		$ 103,781	11,348	(54,814)	391,278
Ending Balance (in shares) at Sep. 30, 2019			32,742,000
Stock compensation, net, shares			(4,000)
Beginning Balance at Mar. 31, 2019	478,487		$ 134,486	14,513	(43,152)	372,640
Beginning Balance (in shares) at Mar. 31, 2019			33,653,000
Net income	2,751					2,751
Other comprehensive income (loss)	3,712				3,712
Stock compensation, net	5,331		$ 5,824	(493)
Stock repurchase	(25,000)		$ (25,000)
Stock repurchase (in shares)			(630,000)
Ending Balance at Jun. 30, 2019	465,281		$ 115,310	14,020	(39,440)	375,391
Ending Balance (in shares) at Jun. 30, 2019			33,148,000
Stock compensation, net, shares			125,000
Net income	15,887					15,887
Other comprehensive income (loss)	(15,374)				(15,374)
Stock compensation, net	10,799		$ 13,471	(2,672)
Stock repurchase	(25,000)		$ (25,000)
Stock repurchase (in shares)			(635,000)
Ending Balance at Sep. 30, 2019	451,593		$ 103,781	11,348	(54,814)	391,278
Ending Balance (in shares) at Sep. 30, 2019			32,742,000
Stock compensation, net, shares			229,000
Beginning Balance at Dec. 31, 2019	$ 472,650		$ 102,507	10,852	(42,441)	401,732
Beginning Balance (in shares) at Dec. 31, 2019	32,674,354		32,674,000
Net income	$ 11,873					11,873
Other comprehensive income (loss)	(12,490)				(12,490)
Stock compensation, net	7,440		$ 8,644	(1,204)
Stock repurchase	(9,092)		$ (9,092)
Stock repurchase (in shares)			(246,000)
Ending Balance at Mar. 31, 2020	470,381		$ 102,059	9,648	(54,931)	413,605
Ending Balance (in shares) at Mar. 31, 2020			32,599,000
Beginning Balance at Dec. 31, 2019	$ 472,650		$ 102,507	10,852	(42,441)	401,732
Beginning Balance (in shares) at Dec. 31, 2019	32,674,354		32,674,000
Net income	$ 25,697
Other comprehensive income (loss)	9,955
Ending Balance at Sep. 30, 2020	$ 511,796		$ 107,055	9,798	(32,486)	427,429
Ending Balance (in shares) at Sep. 30, 2020	32,680,013		32,680,000
Stock compensation, net, shares			171,000
Beginning Balance at Mar. 31, 2020	$ 470,381		$ 102,059	9,648	(54,931)	413,605
Beginning Balance (in shares) at Mar. 31, 2020			32,599,000
Net income	(10,322)					(10,322)
Other comprehensive income (loss)	7,086				7,086
Stock compensation, net	2,176		$ 2,054	122
Ending Balance at Jun. 30, 2020	469,321		$ 104,113	9,770	(47,845)	403,283
Ending Balance (in shares) at Jun. 30, 2020			32,640,000
Stock compensation, net, shares			41,000
Net income	24,146					24,146
Other comprehensive income (loss)	15,359				15,359
Stock compensation, net	2,970		$ 2,942	28
Ending Balance at Sep. 30, 2020	$ 511,796		$ 107,055	$ 9,798	$ (32,486)	$ 427,429
Ending Balance (in shares) at Sep. 30, 2020	32,680,013		32,680,000
Stock compensation, net, shares			40,000