Accumulated Other Comprehensive Loss - Summary of Activity in Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (3,086)
Other comprehensive income (loss) before reclassifications			(90)
Reclassifications from accumulated comprehensive loss to net income	$ 143	$ 167	287	$ 1,482
Total other comprehensive income	122	$ 295	197	$ 1,740
Ending Balance	(2,889)		(2,889)
Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			3
Other comprehensive income (loss) before reclassifications			(103)
Reclassifications from accumulated comprehensive loss to net income			31
Total other comprehensive income			(72)
Ending Balance	(69)		(69)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(3,089)
Other comprehensive income (loss) before reclassifications			13
Reclassifications from accumulated comprehensive loss to net income			256
Total other comprehensive income			269
Ending Balance	$ (2,820)		$ (2,820)