Debt - Additional Information (Detail) (Revolving Credit Facility [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 17, 2013 Revolver Loans Second Amendment Portion Effective One January Two Zero One Four [Member]	Dec. 17, 2013 Revolver Loans Second Amendment Portion Effective Thirty June Two Zero One Four [Member]	Mar. 31, 2014 Revolver Loans [Member]
Line of Credit Facility [Line Items]
Revolving loans in a collective maximum principal amount		$ 125	$ 100	$ 100
Remaining available borrowing capacity	45
Outstanding borrowings under its revolving credit facility	$ 80