Fair Value Disclosures - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers between levels 1 and 2	$ 0	$ 0
Fair Value, Measurements, Recurring [Member] | Significant Other Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, whose fair values are measured on a recurring basis using Level 3 inputs	0	0
Liabilities, whose fair values are measured on a recurring basis using Level 3 inputs	$ 0	$ 0