Consolidated Statements of Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Common Stock Including Additional Paid in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]
Beginning balance (in shares) at Dec. 31, 2018		39,498,000
Beginning balance at Dec. 31, 2018	$ 734,048		$ 1,334,364	$ (196,305)	$ (425,396)	$ 712,663	$ 21,385
Net income (loss)	(149)				(1,907)	(1,907)	1,758
Other comprehensive income (loss), net of tax	(1,780)			(1,780)		(1,780)
Distributions to noncontrolling interests	(517)						(517)
Net stock issuance and repurchases (in shares)		360,000
Net stock issues and repurchases	1,195		1,195			1,195
Stock-based compensation expense	7,048		7,048			7,048
Stock repurchased during period (in shares)		165,000
Stock repurchased	(7,814)		(7,814)			(7,814)
Ending balance (in shares) at Mar. 31, 2019		39,693,000
Ending balance at Mar. 31, 2019	732,031		1,334,793	(198,085)	(427,303)	709,405	22,626
Beginning balance (in shares) at Dec. 31, 2018		39,498,000
Beginning balance at Dec. 31, 2018	734,048		1,334,364	(196,305)	(425,396)	712,663	21,385
Net income (loss)	19,968
Other comprehensive income (loss), net of tax	1,956
Ending balance (in shares) at Jun. 30, 2019		39,395,000
Ending balance at Jun. 30, 2019	746,599		1,325,508	(194,349)	(407,857)	723,302	23,297
Net income attributable to noncontrolling interests	2,429
Net Income (Loss) Attributable to Parent	17,539
Beginning balance (in shares) at Dec. 31, 2018		39,498,000
Beginning balance at Dec. 31, 2018	$ 734,048		1,334,364	(196,305)	(425,396)	712,663	21,385
Stock repurchased during period (in shares)	529,396
Stock repurchased	$ (25,000)
Ending balance (in shares) at Dec. 31, 2019	39,941,000	39,941,000
Ending balance at Dec. 31, 2019	$ 800,815		1,357,600	(204,672)	(376,390)	776,538	24,277
Beginning balance (in shares) at Mar. 31, 2019		39,693,000
Beginning balance at Mar. 31, 2019	732,031		1,334,793	(198,085)	(427,303)	709,405	22,626
Net income (loss)	20,117					19,446
Other comprehensive income (loss), net of tax	3,736			3,736		3,736
Net stock issuance and repurchases (in shares)		66,000
Net stock issues and repurchases	1,481		1,481			1,481
Stock-based compensation expense	6,420		6,420			6,420
Stock repurchased during period (in shares)		364,000
Stock repurchased	(17,186)		(17,186)			(17,186)
Ending balance (in shares) at Jun. 30, 2019		39,395,000
Ending balance at Jun. 30, 2019	746,599		1,325,508	(194,349)	(407,857)	723,302	23,297
Net income attributable to noncontrolling interests	671						671
Net Income (Loss) Attributable to Parent	$ 19,446				19,446
Beginning balance (in shares) at Dec. 31, 2019	39,941,000	39,941,000
Beginning balance at Dec. 31, 2019	$ 800,815		1,357,600	(204,672)	(376,390)	776,538	24,277
Net income (loss)	9,162				8,684	8,684	478
Other comprehensive income (loss), net of tax	(25,211)			(25,211)		(25,211)
Net stock issuance and repurchases (in shares)		235,000
Net stock issues and repurchases	2,247		2,247			2,247
Stock-based compensation expense	8,482		8,482			8,482
Ending balance (in shares) at Mar. 31, 2020		40,176,000
Ending balance at Mar. 31, 2020	$ 795,495		1,368,329	(229,883)	(367,706)	770,740	24,755
Beginning balance (in shares) at Dec. 31, 2019	39,941,000	39,941,000
Beginning balance at Dec. 31, 2019	$ 800,815		1,357,600	(204,672)	(376,390)	776,538	24,277
Net income (loss)	(53,325)
Other comprehensive income (loss), net of tax	$ 36,845
Ending balance (in shares) at Jun. 30, 2020	40,234,000	40,234,000
Ending balance at Jun. 30, 2020	$ 802,869		1,376,134	(167,827)	(430,508)	777,799	25,070
Net income attributable to noncontrolling interests	793
Net Income (Loss) Attributable to Parent	(54,118)
Beginning balance (in shares) at Mar. 31, 2020		40,176,000
Beginning balance at Mar. 31, 2020	795,495		1,368,329	(229,883)	(367,706)	770,740	24,755
Net income (loss)	(62,487)				(62,802)	(62,802)	315
Other comprehensive income (loss), net of tax	62,056			62,056		62,056
Net stock issuance and repurchases (in shares)		58,000
Net stock issues and repurchases	706		706			706
Stock-based compensation expense	$ 7,099		7,099			7,099
Ending balance (in shares) at Jun. 30, 2020	40,234,000	40,234,000
Ending balance at Jun. 30, 2020	$ 802,869		$ 1,376,134	$ (167,827)	$ (430,508)	$ 777,799	$ 25,070
Net income attributable to noncontrolling interests	315
Net Income (Loss) Attributable to Parent	$ (62,802)