Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	COMMON STOCK	RETAINED EARNINGS	RETAINED EARNINGS Adoption of ASU 2016-01	RETAINED EARNINGS Adjusted Balance	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Adoption of ASU 2016-01	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Adjusted Balance	TREASURY STOCK, AT COST
Balance at beginning of year at Dec. 31, 2017		$ 186,903	$ 59,208	$ 169	$ 59,377	$ 596	$ (169)	$ 427	$ (4,633)
Net income	$ 32,569		32,569
Issued treasury shares under the Long Term Incentive Plan		(2,415)
Shares issued in contingent payments as part of a business combination		0
Stock compensation expense for unvested shares		1,675
Other comprehensive income (loss)	(4,457)					(4,457)
Dividends declared			(8,316)
Issued shares under the Long Term Incentive Plan									2,415
Purchased shares									0
Retained shares to cover tax withholdings under the Long Term Incentive Plan									(1,225)
Balance at end of year at Dec. 31, 2018	262,320	186,163	83,630	0	83,630	(4,030)	0	(4,030)	(3,443)
Net income	35,760		35,760
Issued treasury shares under the Long Term Incentive Plan		(1,203)
Shares issued in contingent payments as part of a business combination		0
Stock compensation expense for unvested shares		1,385
Other comprehensive income (loss)	13,856					13,856
Dividends declared			(10,539)
Issued shares under the Long Term Incentive Plan									1,203
Purchased shares									(2,842)
Retained shares to cover tax withholdings under the Long Term Incentive Plan									(631)
Balance at end of year at Dec. 31, 2019	299,309	186,345	108,851	$ 0	$ 108,851	9,826	$ 0	$ 9,826	(5,713)
Net income	41,876		41,876
Issued treasury shares under the Long Term Incentive Plan		(1,579)
Shares issued in contingent payments as part of a business combination		22,554
Stock compensation expense for unvested shares		1,443
Other comprehensive income (loss)	12,206					12,206
Dividends declared			(12,654)
Issued shares under the Long Term Incentive Plan									1,740
Purchased shares									(14,238)
Retained shares to cover tax withholdings under the Long Term Incentive Plan									(560)
Balance at end of year at Dec. 31, 2020	$ 350,097	$ 208,763	$ 138,073			$ 22,032			$ (18,771)