Income Taxes - Components of Net Deferred Taxes (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets
Deferred tax assets	$ 54,179	$ 59,017
Less: valuation allowance	(3,800)	(6,907)
Net deferred tax assets	50,379	52,110
Deferred tax liabilities
Deferred tax liabilities	(140,939)	(172,525)
Net deferred tax liabilities	(90,560)	(120,415)
United States [Member]
Deferred tax assets
Deferred pension plan amounts	22,858	23,497
Accrued expenses not currently deductible	20,041	14,250
Other	3,069	11,267
Deferred tax liabilities
Excess of net book basis over remaining tax basis	(126,096)	(166,959)
Other	(10,277)	(4,969)
Foreign Country [Member]
Deferred tax assets
Deferred pension plan amounts	2,347	3,096
Other	2,064
Net operating loss carry forwards	3,800	6,907
Deferred tax liabilities
Excess of net book basis over remaining tax basis	(200)	(200)
Other	$ (4,366)	$ (397)