Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I)
-URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

Name:	us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Basis of Presentations and Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2019
New Accounting Pronouncements
Federal statutory income tax rate (as a percent)	21.00%	21.00%
ASU 2016-02
New Accounting Pronouncements
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]			true
ASU 2018-02
New Accounting Pronouncements
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]			true
ASU 2018-07
New Accounting Pronouncements
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]			true