Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	COMMON STOCK	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	TREASURY STOCK, AT COST
Balance at beginning of year at Dec. 31, 2018		$ 186,163	$ 83,630	$ (4,030)	$ (3,443)
Net income	$ 26,085		26,085
Dividends declared			(7,771)
Issued treasury shares under the Long Term Incentive Plan		(1,169)
Issued shares as part of a business combination		0
Stock compensation expense for unvested shares		1,024
Other comprehensive income	15,024			15,024
Purchased shares					(2,842)
Issued shares under the Long Term Incentive Plan					1,169
Retained shares to cover tax withholdings under the Long Term Incentive Plan					(617)
Balance at end of year at Sep. 30, 2019	293,223	186,018	101,944	10,994	(5,733)
Balance at beginning of year at Jun. 30, 2019		185,687	95,557	7,877	(4,296)
Net income	9,154		9,154
Dividends declared			(2,767)
Issued treasury shares under the Long Term Incentive Plan		(29)
Stock compensation expense for unvested shares		360
Other comprehensive income	3,117			3,117
Purchased shares					(1,454)
Issued shares under the Long Term Incentive Plan					29
Retained shares to cover tax withholdings under the Long Term Incentive Plan					(12)
Balance at end of year at Sep. 30, 2019	293,223	186,018	101,944	10,994	(5,733)
Balance at beginning of year at Dec. 31, 2019	299,309	186,345	108,851	9,826	(5,713)
Net income	30,519		30,519
Dividends declared			(9,552)
Issued treasury shares under the Long Term Incentive Plan		(1,305)
Issued shares as part of a business combination		22,554
Stock compensation expense for unvested shares		1,050
Other comprehensive income	10,724			10,724
Purchased shares					(14,238)
Issued shares under the Long Term Incentive Plan					1,305
Retained shares to cover tax withholdings under the Long Term Incentive Plan					(398)
Balance at end of year at Sep. 30, 2020	339,968	208,644	129,818	20,550	(19,044)
Balance at beginning of year at Jun. 30, 2020		208,390	122,061	20,036	(19,135)
Net income	10,869		10,869
Dividends declared			(3,112)
Issued treasury shares under the Long Term Incentive Plan		(110)
Stock compensation expense for unvested shares		364
Other comprehensive income	514			514
Purchased shares					0
Issued shares under the Long Term Incentive Plan					110
Retained shares to cover tax withholdings under the Long Term Incentive Plan					(19)
Balance at end of year at Sep. 30, 2020	$ 339,968	$ 208,644	$ 129,818	$ 20,550	$ (19,044)