Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v2.4.1.9
Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Litigation settlement expense $ 4.7us-gaap_LitigationSettlementExpense