Income Tax Effects Related to Components of Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Foreign currency translation adjustments, Before-Tax Amount	$ (2,381)	$ (529)	$ (2,482)
Net change in unrealized gains on marketable securities, Before-Tax Amount	(228)	25	10
Derivatives qualifying as cash flow hedges, net gain (loss), Before-Tax Amount	424	458	1,076
Other comprehensive loss, Before-Tax Amount	(2,185)	(46)	(1,396)
Foreign currency translation adjustments, Tax Effect	0	0	0
Other comprehensive loss, Tax Effect	(78)	(188)	(425)
Foreign currency translation adjustments, Net	(2,381)	(529)	(2,482)
Other comprehensive loss, Net	(2,263)	(234)	(1,821)
Unrealized Net Gains (Losses) on Marketable Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Marketable securities, net gain arising during the period, Before-Tax Amount	0	25	10
Marketable securities, net gain reclassified into income, Before-Tax Amount	(228)	0	0
Net change in unrealized gains on marketable securities, Before-Tax Amount	(228)	25	10
Marketable securities, net gain arising during the period, Tax Effect	0	(9)	(4)
Marketable securities, net gain reclassified into income, Tax Effect	88	0	0
Net change in unrealized gains on marketable securities, Tax Effect	88	(9)	(4)
Marketable securities, net gain arising during the period, Net	0	16	6
Marketable securities, net gain reclassified into income, Net	(140)	0	0
Unrecognized gain on marketable securities, net of tax	(140)	16	6
Other comprehensive loss, Net	(140)	16	6
Derivatives Qualifying as Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Derivatives qualifying as cash flow hedges, net gain (loss), Before-Tax Amount	424	458	1,076
Derivatives qualifying as cash flow hedges, net gain (loss), Tax Effect	(166)	(179)	(421)
Unrecognized gain on derivatives qualifying as cash flow hedges, net of tax	258	279	655
Derivatives Qualifying as Cash Flow Hedges [Member] | Interest Rate Swap [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Derivatives qualifying as cash flow hedges, net gains (losses) arising during the period, Before-Tax Amount	0	(38)	(139)
Derivatives qualifying as cash flow hedges, net (gains) losses reclassified into income, Before-Tax Amount	0	496	1,215
Derivatives qualifying as cash flow hedges, net gain (loss), Before-Tax Amount	0	458	1,076
Derivatives qualifying as cash flow hedges, net gains (losses) arising during the period, Tax Effect	0	15	54
Derivatives qualifying as cash flow hedges, net (gains) losses reclassified into income, Tax Effect	0	(194)	(475)
Derivatives qualifying as cash flow hedges, net gain (loss), Tax Effect	0	(179)	(421)
Derivatives qualifying as cash flow hedges, net gains (losses) arising during the period, Net	0	(23)	(85)
Derivatives qualifying as cash flow hedges, net (gains) losses reclassified into income, Net	0	302	740
Unrecognized gain on derivatives qualifying as cash flow hedges, net of tax	0	279	655
Other comprehensive loss, Net	0	279	655
Derivatives Qualifying as Cash Flow Hedges [Member] | Foreign Exchange Contract [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Derivatives qualifying as cash flow hedges, net gains (losses) arising during the period, Before-Tax Amount	314	0	0
Derivatives qualifying as cash flow hedges, net (gains) losses reclassified into income, Before-Tax Amount	110	0	0
Derivatives qualifying as cash flow hedges, net gain (loss), Before-Tax Amount	424	0	0
Derivatives qualifying as cash flow hedges, net gains (losses) arising during the period, Tax Effect	(123)	0	0
Derivatives qualifying as cash flow hedges, net (gains) losses reclassified into income, Tax Effect	(43)	0	0
Derivatives qualifying as cash flow hedges, net gain (loss), Tax Effect	(166)	0	0
Derivatives qualifying as cash flow hedges, net gains (losses) arising during the period, Net	191	0	0
Derivatives qualifying as cash flow hedges, net (gains) losses reclassified into income, Net	67	0	0
Unrecognized gain on derivatives qualifying as cash flow hedges, net of tax	258	0	0
Other comprehensive loss, Net	$ 258	$ 0	$ 0