Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Deferred Tax Liabilities, Leasing Arrangements	$ 7,808	$ 9,091
Current
Federal	0	0	$ 0
State	191	400	360
Foreign	1,598	2,837	3,742
Total current	1,789	3,237	4,102
Deferred
Federal	(175)	(161)	(151)
State	(125)	(395)	(149)
Foreign	269	130	(118)
Total deferred	(31)	(426)	(418)
Total tax provision	1,758	2,811	3,684
Effective Income Tax Rate Reconciliation Detail [Table]
Income tax provision (benefit) computed at statutory federal income tax rates	(5,268)	(26,903)	(552)
State income taxes (net of federal benefit)	(2,124)	(2,388)	(1,345)
Impact of international operations	4,036	672	13,790
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	0	0	(2,510)
Valuation allowance	4,598	30,640	(8,115)
Other	516	790	2,416
Total tax provision	1,758	2,811	3,684
Domestic and Foreign Income Before Tax Detail [Table]
Domestic	(25,929)	(135,668)	(8,143)
International	843	7,559	5,515
Total	(25,086)	(128,109)	(2,628)
Unrecognized Tax Benefit Liability Rollforward Detail [Table]
Gross unrecognized tax benefits at beginning of period	137	328	530
Lapse in statute of limitations	(120)	(191)	(202)
Gross unrecognized tax benefits at end of period	17	137	328
Recognized interest and penalties	(200)	(300)	$ (200)
Accrued potential interest and penalties	100	200
Amount of unrecognized tax benefits that would affect effective tax rate	100	400
Deferred tax assets:
Net operating losses	104,478	103,834
Accruals	16,515	20,674
Depreciation and amortization for book in excess of tax expense	12,608	14,262
Investment in Partnership	23,344	0
All other	12,743	16,583
Total deferred tax assets	169,688	155,353
Valuation allowance	(146,678)	(123,808)
Net deferred tax assets	23,010	31,545
Deferred tax liabilities:
Excess book over tax basis in property, plant, and equipment	15,402	18,596
All other	1,690	5,635
Total deferred tax liability	24,900	33,322
Net deferred tax liability	1,890	$ 1,777
Increase (decrease) in valuation allowance	22,900
Foreign and state net operating loss carryforwards	80,000
Operating Loss Carryforwards	11,400
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 13,000