Income Taxes - Reconciliation of Effective Income Tax Rate to US Federal Income Tax Statutory Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Statutory US federal income tax expense	$ (5,828)	$ 41,136	$ 32,149
Effect of foreign tax rates	5,415	1,772	2,098
State income taxes, net of US federal benefit	2,353	4,192	6,068
Goodwill impairment	23,762		6,615
Effect of financing	(7,226)	(7,113)	(5,928)
Foreign exchange differences	(154)	(514)	(1,390)
Change in valuation allowance	(49)	(1,718)	(1,532)
Tax rate changes	(447)	(2,146)
Domestic manufacturing deduction	(767)	(5,722)
Foreign tax and other credits	(144)	(6,869)
Disallowed expenses, including transaction costs	1,574	1,300	2,054
Other	(486)	686	544
Provision for income taxes	$ 18,003	$ 25,004	$ 40,678