Consolidated Statements of Equity Statement - USD ($) shares in Thousands, $ 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, 2019		39,941
Beginning balance at Dec. 31, 2019	$ 800,815		$ 1,357,600	$ (204,672)	$ (376,390)	$ 776,538	$ 24,277
Net 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
Net stock issued and repurchased	2,247		2,247			2,247
Stock-based compensation expense	8,482		8,482			8,482
Ending balance at Mar. 31, 2020	795,495		1,368,329	(229,883)	(367,706)	770,740	24,755
Ending balance (in shares) at Mar. 31, 2020		40,176
Beginning balance (in shares) at Dec. 31, 2019		39,941
Beginning balance at Dec. 31, 2019	800,815		1,357,600	(204,672)	(376,390)	776,538	24,277
Net loss	(53,325)
Other comprehensive income (loss), net of tax	36,845
Proceeds from sale of warrants	0
Ending balance at Jun. 30, 2020	802,869		1,376,134	(167,827)	(430,508)	777,799	25,070
Ending balance (in shares) at Jun. 30, 2020		40,234
Beginning balance (in shares) at Mar. 31, 2020		40,176
Beginning balance at Mar. 31, 2020	795,495		1,368,329	(229,883)	(367,706)	770,740	24,755
Net 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
Net stock issued and repurchased	706		706			706
Stock-based compensation expense	7,099		7,099			7,099
Ending balance at Jun. 30, 2020	$ 802,869		1,376,134	(167,827)	(430,508)	777,799	25,070
Ending balance (in shares) at Jun. 30, 2020		40,234
Beginning balance (in shares) at Dec. 31, 2020	40,444	40,444
Beginning balance at Dec. 31, 2020	$ 840,273		1,389,419	(138,526)	(434,345)	816,548	23,725
Net loss	13,580				12,603	12,603	977
Other comprehensive income (loss), net of tax	(11,783)			(11,783)		(11,783)
Net stock issuance and repurchases (in shares)		206
Net stock issued and repurchased	2,009		2,009			2,009
Stock-based compensation expense	6,270		6,270			6,270
Stock issued related to equity offering		4,472
Stock issued related to equity offering	389,419		389,419			389,419
Proceeds from sale of warrants	45,349		45,349			45,349
Purchases of convertible note hedge contracts, net of tax	(63,576)		(63,576)			(63,576)
Registration fee	373		373			373
Ending balance at Mar. 31, 2021	$ 1,221,168		1,768,517	(150,309)	(421,742)	1,196,466	24,702
Ending balance (in shares) at Mar. 31, 2021		45,122
Beginning balance (in shares) at Dec. 31, 2020	40,444	40,444
Beginning balance at Dec. 31, 2020	$ 840,273		1,389,419	(138,526)	(434,345)	816,548	23,725
Net loss	(18,865)
Other comprehensive income (loss), net of tax	(6,646)
Proceeds from sale of warrants	45,349
Ending balance at Jun. 30, 2021	$ 1,200,658		1,775,315	(145,172)	(454,865)	1,175,278	25,380
Ending balance (in shares) at Jun. 30, 2021	45,150	45,150
Beginning balance (in shares) at Mar. 31, 2021		45,122
Beginning balance at Mar. 31, 2021	$ 1,221,168		1,768,517	(150,309)	(421,742)	1,196,466	24,702
Net loss	(32,445)				(33,123)	(33,123)	678
Other comprehensive income (loss), net of tax	5,137			5,137		5,137
Net stock issuance and repurchases (in shares)		28
Net stock issued and repurchased	458		458			458
Stock-based compensation expense	6,316		6,316			6,316
Registration fee	24		24			24
Ending balance at Jun. 30, 2021	$ 1,200,658		$ 1,775,315	$ (145,172)	$ (454,865)	$ 1,175,278	$ 25,380
Ending balance (in shares) at Jun. 30, 2021	45,150	45,150