Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2016	$ 412,606	$ 13,278	$ 112,475	$ 364,414	$ (87,407)	$ 9,846
Net income	22,300	0	0	20,278	0	2,022
Amounts reported in other comprehensive income (loss)	23,021	0	0	0	22,307	714
Dividends common stock	(18,756)	0	0	(18,756)	0	0
Acquisition of noncontrolling interests	(31,787)	0	(21,151)	0	0	(10,636)
Shares issued upon exercise of stock options and other	(2,451)	5	(2,456)	0	0	0
Shares issued for employee stock purchase plan	495	4	491	0	0	0
Share based compensation plans	4,190	21	4,169	0	0	0
Balance at Dec. 31, 2017	409,618	13,308	93,528	365,936	(65,100)	1,946
Cumulative effect of accounting change	(754)	0	0	(754)	0	0
Adjusted Shareholders Equity Balance	408,864	13,308	93,528	365,182	(65,100)	1,946
Net income	59,811	0	0	59,473	0	338
Amounts reported in other comprehensive income (loss)	(15,705)	0	0	0	(15,615)	(90)
Dividends common stock	(19,530)	0	0	(19,530)	0	0
Distributions to noncontrolling affiliate shareholders	(877)	0	0	0	0	(877)
Shares issued upon exercise of stock options and other	(423)	9	(432)	0	0	0
Shares issued for employee stock purchase plan	505	3	502	0	0	0
Share based compensation plans	3,724	18	3,706	0	0	0
Balance at Dec. 31, 2018	436,369	13,338	97,304	405,125	(80,715)	1,317
Cumulative effect of accounting change	(44)	0	0	(44)	0	0
Adjusted Shareholders Equity Balance	436,325	13,338	97,304	405,081	(80,715)	1,317
Net income	31,884	0	0	31,622	0	262
Amounts reported in other comprehensive income (loss)	2,570	0	0	0	2,545	25
Dividends common stock	(23,724)	0	0	(23,724)	0	0
Shares issued related to the Combination	789,080	4,329	784,751	0	0	0
Shares issued upon exercise of stock options and other	894	23	871	0	0	0
Shares issued for employee stock purchase plan	476	3	473	0	0	0
Share based compensation plans	4,861	42	4,819	0	0	0
Balance at Dec. 31, 2019	$ 1,242,366	$ 17,735	$ 888,218	$ 412,979	$ (78,170)	$ 1,604