Derivative Financial Instruments - Additional Information (Details) $ in Millions	Sep. 30, 2018 USD ($)
Active Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate cash flow hedge gain (loss) to be reclassified to interest expense during the next 12 months	$ 0.2
Settled Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate cash flow hedge gain (loss) to be reclassified to interest expense during the next 12 months	$ (0.2)

The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994

Name:	us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant