Financial Derivatives - Deferred Gains (Losses) and Related Taxes on Cash Flow Hedges (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Deferred gains (losses) in AOCI	$ (558)	$ (157)
Tax on deferred gains (losses) in AOCI	31	46
Deferred gains (losses) in AOCI, net of taxes	(527)	$ (111)
Deferred gains (losses) expected to be reclassified to "Revenues" from AOCI during the next twelve months	$ (558)