Recent Accounting Pronouncements - Additional Information (Detail) $ in Millions	9 Months Ended
Sep. 30, 2019 USD ($)
ASU 2018-02 [Member] \| Gains (Losses) on Cash Flow Hedges [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Tax Cuts and Jobs Act of 2017, reclassification from accumulated other comprehensive income to accumulated deficit	$ 1.1

Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification to retained earnings of tax effect from remeasurement of deferred tax pursuant to Tax Cuts and Jobs Act.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL116659650-108580

Name:	us-gaap_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration