Long Term Debt Activity - Summary of Company's Interest Rate Swap Agreements Designated as Cash Flow Hedges (Parenthetical) (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Accounts Payable and Accrued Expenses
Debt Instrument [Line Items]
Estimated Fair Value	$ 4,119
Other Long-term Liabilities
Debt Instrument [Line Items]
Estimated Fair Value	$ 13,161

Fair value of the assets less the liabilities of a derivative or group of derivatives.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611

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