Debt - Total Interest Expense and Fees Recognized on Borrowing under New Credit Agreement (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Debt Disclosure [Abstract]
Interest expense and fees	$ 656	$ 1,013

Amount of the cost of borrowed funds accounted for as interest expense for debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration