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 income (loss)									0	0	0	(86,712)	(86,712)	5,305	(81,407)
Other comprehensive (loss) income									$ 0	0	(1,448)	0	(1,448)	0	(1,448)
Purchases of common stock (in shares)									(88,091)
Purchases of common stock	[1]								$ (1)	(3,947)	0	0	(3,948)	0	(3,948)
Restricted Stock Units (“RSUs”) vested (in shares)									251,393
Restricted Stock Units (“RSUs”) vested									$ 2	0	0	0	2	0	2
Dividends on common stock ($0.13 per share)									0	0	0	(12,175)	(12,175)	0	(12,175)
Transactions with non-controlling interests									$ 0	0	0	0	0	(3,209)	(3,209)
Amortized RSUs and other (in shares)									9,008
Amortized RSUs and other									$ 0	7,652	10	(107)	7,555	(2)	$ 7,553
Balances (in shares) at Jun. 30, 2019									46,838,199						46,838,199
Balances at Jun. 30, 2019									$ 468	568,264	(2,187)	579,920	1,146,465	47,718	$ 1,194,183
Balances (in shares) at Mar. 31, 2019									46,812,366
Balances at Mar. 31, 2019									$ 468	566,497	(1,081)	610,302	1,176,186	48,333	1,224,519
Net income (loss)									0	0	0	(24,242)	(24,242)	2,596	(21,646)
Other comprehensive (loss) income									$ 0	0	(1,116)	0	(1,116)	0	(1,116)
Purchases of common stock (in shares)									(1,987)
Purchases of common stock	[1]								$ 0	(81)	0	0	(81)	0	(81)
Restricted Stock Units (“RSUs”) vested (in shares)									17,443
Restricted Stock Units (“RSUs”) vested									$ 0	0	0	0	0	0	0
Dividends on common stock ($0.13 per share)									0	0	0	(6,089)	(6,089)	0	(6,089)
Transactions with non-controlling interests									$ 0	0	0	0	0	(3,210)	(3,210)
Amortized RSUs and other (in shares)									10,377
Amortized RSUs and other									$ 0	1,848	10	(51)	1,807	(1)	$ 1,806
Balances (in shares) at Jun. 30, 2019									46,838,199						46,838,199
Balances at Jun. 30, 2019									$ 468	568,264	(2,187)	579,920	1,146,465	47,718	$ 1,194,183
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 income (loss)									0	0	0	(61,965)	(61,965)	(11,546)	(73,511)
Other comprehensive (loss) income									$ 0	0	(3,155)		(3,155)	0	(3,155)
Purchases of common stock (in shares)									(53,921)
Purchases of common stock	[1]								$ 0	(727)	0	0	(727)	0	(727)
Restricted Stock Units (“RSUs”) vested (in shares)									168,360
Restricted Stock Units (“RSUs”) vested									$ 2	(2)	0	0	0	0	0
Dividends on common stock ($0.13 per share)									0	0	0	(11,862)	(11,862)	0	(11,862)
Transactions with non-controlling interests									$ 0	0	0	0	0	(2,360)	(2,360)
Amortized RSUs and other (in shares)									33,670
Amortized RSUs and other									$ 0	4,460	0	(135)	4,325	0	$ 4,325
Balances (in shares) at Jun. 30, 2020									45,651,914						45,651,914
Balances at Jun. 30, 2020									$ 458	553,038	(5,800)	520,025	1,067,721	23,039	$ 1,090,760
Balances (in shares) at Mar. 31, 2020									45,592,292
Balances at Mar. 31, 2020									$ 457	551,189	(6,538)	522,639	1,067,747	32,057	1,099,804
Net income (loss)									0	0	0	3,405	3,405	(4,378)	(973)
Other comprehensive (loss) income									$ 0	0	738	0	738	0	738
Purchases of common stock (in shares)									(4,211)
Purchases of common stock	[1]								$ 0	(73)	0	0	(73)	0	(73)
Restricted Stock Units (“RSUs”) vested (in shares)									29,305
Restricted Stock Units (“RSUs”) vested									$ 1	(1)	0	0	0	0	0
Dividends on common stock ($0.13 per share)									0	0	0	(5,935)	(5,935)	0	(5,935)
Transactions with non-controlling interests									$ 0	0	0	0	0	(4,640)	(4,640)
Amortized RSUs and other (in shares)									34,528
Amortized RSUs and other									$ 0	1,923	0	(84)	1,839	0	$ 1,839
Balances (in shares) at Jun. 30, 2020									45,651,914						45,651,914
Balances at Jun. 30, 2020									$ 458	$ 553,038	$ (5,800)	$ 520,025	$ 1,067,721	$ 23,039	$ 1,090,760

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