Related-Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2013
Related Party Transactions [Abstract]
Interest expense	$ 266,000	$ 488,000
Agreement with related party, Termination date		Sep. 06, 2013

Date of maturity or expiration of arrangements with a related party (for example, but not limited to, leasing and debt arrangements between related parties), in CCYY-MM-DD format.

No definition available.

Name:	us-gaap_RelatedPartyTransactionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration