Condensed Consolidated Statements of Stockholders' Equity And Noncontrolling Interest - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Tax benefit and Translation adjustment related to adoption of ASU	$ 513	$ 900,795	$ (15,183)		$ (388,524)		$ (28,024)	$ 287,433		$ 469,577
Beginning balance at Dec. 31, 2018	513	900,795	(15,183)		(388,524)		(28,024)	287,433		469,577
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)					29,408			(6,738)		29,408
Adjustment of noncontrolling interest to redemption value					(10,420)			10,420		(10,420)
Tax benefit and Translation adjustment related to adoption of ASU	514	899,164	(15,687)	$ 2,707	(412,905)	$ (2,707)	(30,622)	291,115		440,464
Other comprehensive income (loss), net of income taxes							109			109
Payment of dividends		168	(504)		(46,076)					(46,412)
Restricted stock units and stock options surrendered	1	(3,825)								(3,824)
Stock-based compensation expense		2,026								2,026
Ending balance at Mar. 31, 2019	514	899,164	(15,687)	2,707	(412,905)	(2,707)	(30,622)	291,115		440,464
Beginning balance at Dec. 31, 2018	513	900,795	(15,183)		(388,524)		(28,024)	287,433		469,577
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)										78,791
Tax benefit and Translation adjustment related to adoption of ASU	514	901,129	(15,687)		(420,408)		(30,524)	287,718		435,024
Ending balance at Jun. 30, 2019	514	901,129	(15,687)		(420,408)		(30,524)	287,718		435,024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Tax benefit and Translation adjustment related to adoption of ASU	514	899,164	(15,687)	2,707	(412,905)	(2,707)	(30,622)	291,115		440,464
Beginning balance at Mar. 31, 2019	514	899,164	(15,687)	2,707	(412,905)	(2,707)	(30,622)	291,115		440,464
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)					49,383			(3,099)		49,383
Adjustment of noncontrolling interest to redemption value					(10,293)			10,293		(10,293)
Tax benefit and Translation adjustment related to adoption of ASU	514	901,129	(15,687)	2,707	(420,408)	(2,707)	(30,524)	287,718		435,024
Other comprehensive income (loss), net of income taxes							98			98
Payment of dividends		93			(46,593)					(46,500)
Distribution from consolidated joint venture								(10,591)
Restricted stock units and stock options surrendered		(63)								(63)
Stock-based compensation expense		1,935								1,935
Ending balance at Jun. 30, 2019	514	901,129	(15,687)		(420,408)		(30,524)	287,718		435,024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Tax benefit and Translation adjustment related to adoption of ASU	514	901,129	(15,687)		(420,408)		(30,524)	287,718		435,024
Tax benefit and Translation adjustment related to adoption of ASU	549	1,185,168	(17,315)		(495,514)		(28,159)	221,511		644,729
Transition adjustment										(495,514)
Beginning balance at Dec. 31, 2019	549	1,185,168	(17,315)		(495,514)		(28,159)	221,511		644,729
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)					(46,516)			(4,220)		(46,516)
Adjustment of noncontrolling interest to redemption value					54,265			(54,265)		54,265
Tax benefit and Translation adjustment related to adoption of ASU	550	1,185,885	(17,872)	5,343	(545,104)	(2,158)	(63,438)	163,026	$ 3,185	560,021
Other comprehensive income (loss), net of income taxes							(37,437)			(37,437)
Payment of dividends		147	(557)		(51,996)					(52,406)
Restricted stock units and stock options surrendered	1	(1,660)								(1,659)
Stock-based compensation expense		2,230								2,230
Ending balance at Mar. 31, 2020	550	1,185,885	(17,872)	5,343	(545,104)	(2,158)	(63,438)	163,026	3,185	560,021
Beginning balance at Dec. 31, 2019	549	1,185,168	(17,315)		(495,514)		(28,159)	221,511		644,729
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)										(220,008)
Tax benefit and Translation adjustment related to adoption of ASU	550	1,188,046	(18,467)		(711,798)		(64,627)	141,693		393,704
Ending balance at Jun. 30, 2020	550	1,188,046	(18,467)		(711,798)		(64,627)	141,693		393,704
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Tax benefit and Translation adjustment related to adoption of ASU	550	1,185,885	(17,872)	5,343	(545,104)	(2,158)	(63,438)	163,026	3,185	560,021
Transition adjustment									(5,300)
Beginning balance at Mar. 31, 2020	550	1,185,885	(17,872)	5,343	(545,104)	(2,158)	(63,438)	163,026	3,185	560,021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)					(173,492)			(14,167)		(173,492)
Adjustment of noncontrolling interest to redemption value					6,174			(6,174)		6,174
Tax benefit and Translation adjustment related to adoption of ASU	550	1,188,046	(18,467)	$ 5,343	(711,798)	$ (2,158)	(64,627)	141,693	$ 3,185	393,704
Other comprehensive income (loss), net of income taxes							(1,189)			(1,189)
Payment of dividends			(595)		624					29
Distribution from consolidated joint venture								(992)
Restricted stock units and stock options surrendered		(29)								(29)
Stock-based compensation expense		2,190								2,190
Ending balance at Jun. 30, 2020	550	1,188,046	(18,467)		(711,798)		(64,627)	141,693		393,704
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Tax benefit and Translation adjustment related to adoption of ASU	$ 550	$ 1,188,046	$ (18,467)		$ (711,798)		$ (64,627)	$ 141,693		393,704
Transition adjustment										$ (711,798)