Shareholders' Equity - Changes in Accumulated Other Comprehensive Income (Loss) Balances (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2012	$ 12,238	$ 11,706
Reclassification to the income statement	(4)
Change in fair value	(528)
Balance as of March 31, 2013		11,706
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2012	13,669	12,030
Change in fair value	(1,639)
Balance as of March 31, 2013		12,030
Cash Flow Hedging
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2012	(1,431)	(324)
Reclassification to the income statement	(4)
Change in fair value	1,111
Balance as of March 31, 2013		$ (324)