Financing Activity - Interest Expense and Deferred Financing Amortization (Details) - Credit Agreements and Restructured Credit Agreements - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
2018 Revolving Facility
Debt Instrument [Line Items]
Interest expense	$ 548	$ 2,483
Deferred financing amortization	299	274
Term Loans
Debt Instrument [Line Items]
Interest expense	20,421	5,506
Deferred financing amortization	$ 1,780	$ 191

Amount of amortization expense attributable to debt issuance costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(8))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration