Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands		Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balances (in shares) at Dec. 31, 2018									46,665,889
Balances at Dec. 31, 2018		$ 0	$ 0	$ 0	$ (539)	$ (539)	$ 0	$ (539)	$ 467	$ 564,559	$ (749)	$ 679,453	$ 1,243,730	$ 45,624	$ 1,289,354
Net loss									0	0	0	(62,470)	(62,470)	2,709	(59,761)
Other comprehensive (loss) income									$ 0	0	(332)		(332)	0	(332)
Purchases of common stock (in shares)									(86,104)
Purchases of common stock (1)	[1]								$ (1)	(3,866)	0	0	(3,867)	0	(3,867)
Restricted Stock Units (“RSUs”) vested (in shares)									233,950
Restricted Stock Units (“RSUs”) vested									$ 2	0	0	0	2	0	2
Dividends on common stock ($0.13 per share)									$ 0	0	0	(6,086)	(6,086)	0	(6,086)
Amortized RSUs and other (in shares)									(1,369)
Amortized RSUs and other									$ 0	5,804	0	(56)	5,748	0	$ 5,748
Purchases of common stock (in shares)									86,104
Balances (in shares) at Mar. 31, 2019									46,812,366						46,812,366
Balances at Mar. 31, 2019									$ 468	566,497	(1,081)	610,302	1,176,186	48,333	$ 1,224,519
Balances (in shares) at Dec. 31, 2018									46,665,889
Balances at Dec. 31, 2018		0	0	0	(539)	(539)	0	(539)	$ 467	564,559	(749)	679,453	1,243,730	45,624	1,289,354
Net loss															(59,761)
Other comprehensive (loss) income															$ (332)
Balances (in shares) at Dec. 31, 2019									45,503,805						45,503,805
Balances at Dec. 31, 2019		$ 0	$ 0	$ 0	$ (366)	$ (366)	$ 0	$ (366)	$ 456	549,307	(2,645)	594,353	1,141,471	36,945	$ 1,178,416
Net loss									0	0	0	(65,370)	(65,370)	(7,168)	(72,538)
Other comprehensive (loss) income									$ 0	0	(3,893)	0	(3,893)	0	(3,893)
Purchases of common stock (in shares)									(49,710)
Purchases of common stock (1)	[1]								$ 0	(653)	0	0	(653)	0	(653)
Restricted Stock Units (“RSUs”) vested (in shares)									139,055
Restricted Stock Units (“RSUs”) vested									$ 1	(1)	0	0	0	0	0
Dividends on common stock ($0.13 per share)									0	0	0	(5,927)	(5,927)	0	(5,927)
Transactions with non-controlling interests									$ 0	0	0	0	0	2,280	2,280
Amortized RSUs and other (in shares)									(858)
Amortized RSUs and other									$ 0	2,536	0	(51)	2,485	0	$ 2,485
Purchases of common stock (in shares)									49,710
Balances (in shares) at Mar. 31, 2020									45,592,292						45,592,292
Balances at Mar. 31, 2020									$ 457	$ 551,189	$ (6,538)	$ 522,639	$ 1,067,747	$ 32,057	$ 1,099,804

[1] Represents shares purchased in connection with employee tax withholding for RSUs vested under our 2012 Equity Incentive Plan.