Financial Instruments and Fair Value Measurements - Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financial liabilities:
Interest rate swap	$ 1,588	$ 1,964
Recurring \| Level 1
Financial liabilities:
Interest rate swap	0	0
Recurring \| Level 2
Financial liabilities:
Interest rate swap	1,588	1,964
Recurring \| Level 3
Financial liabilities:
Interest rate swap	$ 0	$ 0

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

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