Other Assets - Schedule of Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Other Current Assets:
Income tax receivable	$ 12,513	$ 12,768
Other	17,495	15,280
Total other current assets	30,008	28,048
Other Assets:
Deferred tax assets, net	10,907	9,497
Other	1,900	2,195
Total other assets	$ 12,807	$ 11,692