Amount, after accumulated amortization, of debt discount.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Debt and Other Obligations - Seller Notes (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Seller Notes
Debt and Other Obligations
Unamortized discount	$ 0.9	$ 0.4
Seller Notes \| Minimum
Debt and Other Obligations
Interest rate stated percentage	2.50%
Seller Notes \| Maximum
Debt and Other Obligations
Interest rate stated percentage	3.00%
Deferred payment obligation
Debt and Other Obligations
Unamortized discount	$ 0.5
Interest rate stated percentage	3.00%