Condensed Consolidated Statements of Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Common stock, shares, beginning balance at Dec. 31, 2018		104,885,000
Stockholders' equity, beginning balance at Dec. 31, 2018	$ 5,212,403	$ 105	$ 2,825,211	$ 2,441,553	$ (54,466)
Net income (loss)	(86,147)			(86,147)
Other comprehensive income	7,546				7,546
Common stock issued for share-based compensation, shares		805,000
Common stock issued for share-based compensation	1,673	$ 1	1,672
Tax withholding related to vesting of restricted stock, shares		(300,000)
Tax withholding related to vesting of restricted stock	(15,732)	$ (1)	(15,731)
Share-based compensation expense	15,381		15,381
Common stock, shares, ending balance at Jun. 30, 2019		105,390,000
Stockholders' equity, ending balance at Jun. 30, 2019	5,135,124	$ 105	2,826,533	2,355,406	(46,920)
Common stock, shares, beginning balance at Mar. 31, 2019		105,353,000
Stockholders' equity, beginning balance at Mar. 31, 2019	5,129,161	$ 105	2,814,115	2,373,954	(59,013)
Net income (loss)	(18,548)			(18,548)
Other comprehensive income	12,093				12,093
Common stock issued for share-based compensation, shares		38,000
Common stock issued for share-based compensation	1,672	$ 0	1,672
Tax withholding related to vesting of restricted stock, shares		(1,000)
Tax withholding related to vesting of restricted stock	(68)	$ 0	(68)
Share-based compensation expense	10,814		10,814
Common stock, shares, ending balance at Jun. 30, 2019		105,390,000
Stockholders' equity, ending balance at Jun. 30, 2019	5,135,124	$ 105	2,826,533	2,355,406	(46,920)
Cumulative effect adjustment for the adoption of ASU 2016-13	$ (9,213)
Cumulative effect adjustment for the adoption of ASU 2016-13 | Accounting Standards Update 2016-13				(9,213)
Common stock, shares, beginning balance at Dec. 31, 2019	105,448,921	105,449,000
Stockholders' equity, beginning balance at Dec. 31, 2019	$ 5,096,767	$ 105	2,849,376	2,326,620	(79,334)
Net income (loss)	127,615			127,615
Other comprehensive income	12,074				12,074
Common stock issued for share-based compensation, shares		789,000
Common stock issued for share-based compensation	1,363	$ 1	1,362
Tax withholding related to vesting of restricted stock, shares		(277,000)
Tax withholding related to vesting of restricted stock	(12,764)	$ 0	(12,764)
Share-based compensation expense	$ 10,954		10,954
Common stock, shares, ending balance at Jun. 30, 2020	105,960,516	105,961,000
Stockholders' equity, ending balance at Jun. 30, 2020	$ 5,226,796	$ 106	2,848,928	2,445,022	(67,260)
Common stock, shares, beginning balance at Mar. 31, 2020		105,906,000
Stockholders' equity, beginning balance at Mar. 31, 2020	5,168,622	$ 106	2,844,055	2,408,111	(83,650)
Net income (loss)	36,911			36,911
Other comprehensive income	16,390				16,390
Common stock issued for share-based compensation, shares		56,000
Common stock issued for share-based compensation	1,362	$ 0	1,362
Tax withholding related to vesting of restricted stock, shares		(1,000)
Tax withholding related to vesting of restricted stock	(85)	$ 0	(85)
Share-based compensation expense	$ 3,596		3,596
Common stock, shares, ending balance at Jun. 30, 2020	105,960,516	105,961,000
Stockholders' equity, ending balance at Jun. 30, 2020	$ 5,226,796	$ 106	$ 2,848,928	$ 2,445,022	$ (67,260)