Changes in Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended		3 Months Ended	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Mar. 31, 2014 Foreign Currency Translation	Dec. 31, 2013 Foreign Currency Translation	Dec. 31, 2013 Defined Benefit Pension Plans	Mar. 31, 2014 Accumulated Other Comprehensive Income	Dec. 31, 2013 Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income [Line Items]
Beginning balance	$ 1,227	[1]		$ 1,227	$ 1,611	$ (232)	$ 1,227	$ 1,379
Other comprehensive income before reclassifications				107	(988)		107	(988)
Amounts reclassified from AOCI					604	232		836
Net other comprehensive (loss) income	109		(164)	107	(384)	232	107	(152)
Ending balance	$ 1,334			$ 1,334	$ 1,227		$ 1,334	$ 1,227

[1] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2013 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.