Employee Benefit Plans - Amounts Recognized in the Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued expenses	$ (10,400)	$ (8,010)
Other non-current liabilities	(79)	0
Accrued retirement benefits	(4,136)	(4,420)
Pension Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued expenses	0	0
Other non-current liabilities	0	(716)
Accrued retirement benefits	0	0
Net amount recognized	0	(716)
Post-Employment Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued expenses	(545)	(506)
Other non-current liabilities	0	0
Accrued retirement benefits	(4,136)	(4,420)
Net amount recognized	$ (4,681)	$ (4,926)