Changes in Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Loss) ("AOCI") by Component (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012			$ 14,960
Other comprehensive income (loss) before reclassification, net of tax			(1,490)
Amount reclassified from AOCI (1)			(15)
Net current period other comprehensive income (loss)	(1,346)	(1,146)	(1,505)	38
Balance at June 30, 2013	13,455		13,455
Cash Flow Hedge Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012
Other comprehensive income (loss) before reclassification, net of tax			150
Amount reclassified from AOCI (1)
Net current period other comprehensive income (loss)			150
Balance at June 30, 2013	150		150
Available-for-Sale Securities Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012			1,656
Other comprehensive income (loss) before reclassification, net of tax			361
Amount reclassified from AOCI (1)			(15)
Net current period other comprehensive income (loss)			346
Balance at June 30, 2013	2,002		2,002
Foreign currency Translation Adjustment[Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012			13,606
Other comprehensive income (loss) before reclassification, net of tax			(2,001)
Amount reclassified from AOCI (1)
Net current period other comprehensive income (loss)			(2,001)
Balance at June 30, 2013	11,605		11,605
Pension Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2012			(302)
Other comprehensive income (loss) before reclassification, net of tax
Amount reclassified from AOCI (1)
Net current period other comprehensive income (loss)
Balance at June 30, 2013	$ (302)		$ (302)