Commitments and Loss Contingency - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
Long-term Purchase Commitment [Line Items]
Renewal options of building leases	Up to three five-year renewal options
Minimum [Member]
Long-term Purchase Commitment [Line Items]
Original term of operating lease	1 year
Term of agreements with third party vendors	One year
Maximum [Member]
Long-term Purchase Commitment [Line Items]
Original term of operating lease	20 years
Term of agreements with third party vendors	Five years