CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - UNAUDITED - USD ($) $ in Thousands	Common Stock	Additional Paid-in-Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Beginning balance at Dec. 31, 2020	$ 45	$ 433,941	$ 247,638	$ 14,087	$ 695,711
Beginning balance (in shares) at Dec. 31, 2020	44,667,650
Net income			85,635		85,635
Other comprehensive loss				(5,320)	(5,320)
Stock based compensation		2,202			2,202
Cash dividend			(12,089)		(12,089)
Exercise of options		1,880			1,880
Exercise of options (in shares)	211,203
Stock grants - vesting of restricted stock units (in shares)	117,223
Repurchase of shares from restricted shares vesting		(1,188)			(1,188)
Repurchase of shares from restricted shares vesting (in shares)	(40,937)
Ending balance at Sep. 30, 2021	$ 45	436,835	321,184	8,767	766,831
Ending balance (in shares) at Sep. 30, 2021	44,955,139
Beginning balance at Jun. 30, 2021	$ 45	435,201	287,997	10,775	734,018
Beginning balance (in shares) at Jun. 30, 2021	44,819,743
Net income			37,226		37,226
Other comprehensive loss				(2,008)	(2,008)
Stock based compensation		573			573
Cash dividend			(4,039)		(4,039)
Exercise of options		1,061			1,061
Exercise of options (in shares)	135,396
Ending balance at Sep. 30, 2021	$ 45	436,835	321,184	8,767	766,831
Ending balance (in shares) at Sep. 30, 2021	44,955,139
Beginning balance at Dec. 31, 2021	$ 56	720,744	340,976	2,275	1,064,051
Beginning balance (in shares) at Dec. 31, 2021	56,432,070
Net income			93,158		93,158
Other comprehensive loss				(15,828)	(15,828)
Stock based compensation		2,770			2,770
Cash dividend			(18,627)		(18,627)
Exercise of options		18			18
Exercise of options (in shares)	2,000
Stock grants - vesting of restricted stock units (in shares)	134,374
Repurchase of shares from restricted shares vesting		(1,120)			(1,120)
Repurchase of shares from restricted shares vesting (in shares)	(43,190)
Stock repurchases		(2,457)			(2,457)
Stock repurchases (Shares)	(137,583)
Ending balance at Sep. 30, 2022	$ 56	719,955	415,507	(13,553)	1,121,965
Ending balance (in shares) at Sep. 30, 2022	56,387,671
Beginning balance at Jun. 30, 2022	$ 56	719,222	392,704	(9,073)	1,102,909
Beginning balance (in shares) at Jun. 30, 2022	56,386,914
Net income			29,006		29,006
Other comprehensive loss				(4,480)	(4,480)
Stock based compensation		733			733
Cash dividend			(6,203)		(6,203)
Stock grants - vesting of restricted stock units (in shares)	1,000
Repurchase of shares from restricted shares vesting (in shares)	(243)
Ending balance at Sep. 30, 2022	$ 56	$ 719,955	$ 415,507	$ (13,553)	$ 1,121,965
Ending balance (in shares) at Sep. 30, 2022	56,387,671