Accumulated Other Comprehensive Loss - Summary of Activity in Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (3,086)
Other comprehensive income (loss) before reclassifications			(85)
Reclassifications from accumulated comprehensive loss to net income	$ 53	$ 161	340	$ 1,643
Total other comprehensive income	58	$ 291	255	$ 2,031
Ending Balance	(2,831)		(2,831)
Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			3
Other comprehensive income (loss) before reclassifications			(107)
Reclassifications from accumulated comprehensive loss to net income			47
Total other comprehensive income			(60)
Ending Balance	(57)		(57)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(3,089)
Other comprehensive income (loss) before reclassifications			22
Reclassifications from accumulated comprehensive loss to net income			293
Total other comprehensive income			315
Ending Balance	$ (2,774)		$ (2,774)