Restructuring and Severance - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Restructuring and severance	$ 437	$ 1,800
Long-term Debt
Restructuring Cost And Reserve [Line Items]
Restructuring and severance	200
Accrued Liabilities
Restructuring Cost And Reserve [Line Items]
Restructuring and severance	$ 1,100