Condensed Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	AOCI Attributable to Parent	Treasury Stock	Retained Earnings	Parent	Noncontrolling Interest
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2018	$ 451,431	$ 18,625	$ 124,395	$ (8,310)	$ (66,392)	$ 380,431	$ 448,749	$ 2,682
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	21,846					21,716	21,716	130
Other Comprehensive Income (Loss), Net of Tax	11,897			11,897			11,897	0
Treasury Stock, Value, Acquired, Cost Method	3,917				3,917		3,917	0
Sharebased Compensation Effect On Stockholders Equity	(557)		(1,162)		605		(557)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2019	473,918	18,625	122,221	3,587	(69,704)	399,160	473,889	29
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	403						0	403
Dividends, Common Stock, Cash	2,987					2,987	2,987	0
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	3,392		1,012				1,012	2,380
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Jun. 30, 2019	468,142	18,625	121,586	2,298	(67,428)	393,018	468,099	43
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	6,128					6,142	6,142	(14)
Other Comprehensive Income (Loss), Net of Tax	1,289			1,289			1,289	0
Treasury Stock, Value, Acquired, Cost Method	2,318				2,318		2,318	0
Sharebased Compensation Effect On Stockholders Equity	677		635		42		677	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2019	473,918	18,625	122,221	3,587	(69,704)	399,160	473,889	29
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2019	459,712	18,625	122,717	1,212	(69,724)	386,864	459,694	18
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	13,416					13,387	13,387	29
Other Comprehensive Income (Loss), Net of Tax	2,706			2,706			2,706	0
Treasury Stock, Value, Acquired, Cost Method	7,053				7,053		7,053	0
Sharebased Compensation Effect On Stockholders Equity	1,728		1,637		91		1,728	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2020	467,260	18,625	124,354	3,918	(76,686)	397,005	467,216	44
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	3						0	3
Dividends, Common Stock, Cash	3,246					3,246	3,246	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Jun. 30, 2020	459,324	18,625	123,804	2,854	(74,325)	388,317	459,275	49
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	8,683					8,688	8,688	(5)
Other Comprehensive Income (Loss), Net of Tax	1,064			1,064			1,064	0
Treasury Stock, Value, Acquired, Cost Method	2,452				2,452		2,452	0
Sharebased Compensation Effect On Stockholders Equity	641		550		91		641	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 30, 2020	$ 467,260	$ 18,625	$ 124,354	$ 3,918	$ (76,686)	$ 397,005	$ 467,216	$ 44