Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

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_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Supplemental Guarantor Condensed Consolidated Financial Statements - Additional Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Jun. 23, 2017	Apr. 12, 2011
Interest owned by the holding company	100.00%
6.75% Senior Secured Notes [Member] \| Secured Debt [Member]
Debt Instrument, Face Amount		$ 200.0
Debt Instrument, Interest Rate, Stated Percentage		6.75%
8.75% Senior Secured Notes [Member] \| Secured Debt [Member]
Debt Instrument, Face Amount			$ 200.0
Debt Instrument, Interest Rate, Stated Percentage		8.75%