Condensed Consolidated Statements of Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Cumulative effect adjustment for the adoption of ASU 2016-13	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Earnings [Member]	Accumulated Earnings [Member] Cumulative effect adjustment for the adoption of ASU 2016-13	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)	(55,525)				(55,525)
Other comprehensive income	14,948						14,948
Common stock issued for share-based compensation, shares			826,000
Common stock issued for share-based compensation	1,673		$ 1	1,672
Tax withholding related to vesting of restricted stock, shares			(305,000)
Tax withholding related to vesting of restricted stock	(16,071)		$ (1)	(16,070)
Share-based compensation expense	25,055			25,055
Common stock, shares, ending balance at Sep. 30, 2019			105,406,000
Stockholders' equity, ending balance at Sep. 30, 2019	5,182,483		$ 105	2,835,868	2,386,028		(39,518)
Common stock, shares, beginning balance at Jun. 30, 2019			105,390,000
Stockholders' equity, beginning balance at Jun. 30, 2019	5,135,124		$ 105	2,826,533	2,355,406		(46,920)
Net income (loss)	30,622				30,622
Other comprehensive income	7,402						7,402
Common stock issued for share-based compensation, shares			21,000
Common stock issued for share-based compensation	0		$ 0	0
Tax withholding related to vesting of restricted stock, shares			(5,000)
Tax withholding related to vesting of restricted stock	(339)		$ 0	(339)
Share-based compensation expense	9,674			9,674
Common stock, shares, ending balance at Sep. 30, 2019			105,406,000
Stockholders' equity, ending balance at Sep. 30, 2019	$ 5,182,483		$ 105	2,835,868	2,386,028		(39,518)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | Accounting Standards Update 2016-13		$ (9,213)				$ (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)	282,652				282,652
Other comprehensive income	19,637						19,637
Common stock issued for share-based compensation, shares			808,000
Common stock issued for share-based compensation	1,363		$ 1	1,362
Tax withholding related to vesting of restricted stock, shares			(282,000)
Tax withholding related to vesting of restricted stock	(13,053)		$ 0	(13,053)
Share-based compensation expense	$ 17,960			17,960
Common stock, shares, ending balance at Sep. 30, 2020	105,974,984		105,975,000
Stockholders' equity, ending balance at Sep. 30, 2020	$ 5,396,113		$ 106	2,855,645	2,600,059		(59,697)
Common stock, shares, beginning balance at Jun. 30, 2020			105,961,000
Stockholders' equity, beginning balance at Jun. 30, 2020	5,226,796		$ 106	2,848,928	2,445,022		(67,260)
Net income (loss)	155,037				155,037
Other comprehensive income	7,563						7,563
Common stock issued for share-based compensation, shares			19,000
Common stock issued for share-based compensation	0		$ 0	0
Tax withholding related to vesting of restricted stock, shares			(5,000)
Tax withholding related to vesting of restricted stock	(289)		$ 0	(289)
Share-based compensation expense	$ 7,006			7,006
Common stock, shares, ending balance at Sep. 30, 2020	105,974,984		105,975,000
Stockholders' equity, ending balance at Sep. 30, 2020	$ 5,396,113		$ 106	$ 2,855,645	$ 2,600,059		$ (59,697)