Accumulated Other Comprehensive Income (Loss) - Change in Accumulated Other Comprehensive Income (Loss) (AOCI) by Component, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI, balance as of December 31, 2016	$ 781,106
Other comprehensive (loss) income before reclassifications	259
Amounts reclassified from AOCI	898
Total other comprehensive (loss) income, net of tax	1,157	$ 3,079
AOCI, balance as of March 31, 2017	590,611
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI, balance as of December 31, 2016	(8,439)
Other comprehensive (loss) income before reclassifications	385
Total other comprehensive (loss) income, net of tax	385
AOCI, balance as of March 31, 2017	(8,054)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI, balance as of December 31, 2016	172
Other comprehensive (loss) income before reclassifications	(126)
Amounts reclassified from AOCI	194
Total other comprehensive (loss) income, net of tax	68
AOCI, balance as of March 31, 2017	240
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI, balance as of December 31, 2016	(38,189)
Amounts reclassified from AOCI	704
Total other comprehensive (loss) income, net of tax	704
AOCI, balance as of March 31, 2017	(37,485)
AOCI, Total [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI, balance as of December 31, 2016	(46,456)
AOCI, balance as of March 31, 2017	$ (45,299)