Reorganization - Summary of Roll Forward of Activity in Reorganization Accrual (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Additions	$ 1,905	$ 1,421	$ 375
Workforce Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Accrual Beginning Balance	14	375
Additions	1,905	1,421
Cash payments	(1,798)	(1,782)
Accrual Ending Balance	$ 121	$ 14