Commitments, Contingencies and Off-Balance Sheet Arrangements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Line Items]
Operating lease, future minimum lease payments	$ 322.4
Rent expense	50.8	49.5	29.3
Employment agreements with certain other key members of management, expiration year	2015
Executive Officer One
Commitments and Contingencies Disclosure [Line Items]
Terms of employment and compensation agreement with a key officer	An agreement for one of the officers provides for the officer to earn a minimum of $1.3 per year through a three-year period ending from any date after which it is measured, adjusted annually for changes in the consumer price index (as defined) or as determined by the Company's Compensation Committee of the Board of Directors, as well as a retirement compensation payment equal to 1.5 times the base salary.
Retirement compensation payment factor of base salary	1.5
Executive Officer One | Minimum
Commitments and Contingencies Disclosure [Line Items]
Annual earning of a key officer	1.3
Executive Officer Two
Commitments and Contingencies Disclosure [Line Items]
Terms of employment and compensation agreement with a key officer	One other agreement provides for an officer to receive annual minimum compensation of $0.9 per year through a three-year period ending from any date after which it is measured, adjusted as determined by the Company's Compensation Committee of the Board of Directors, and for the Company to make a retirement compensation payment equal to 7.5% of the officer's then current year annual salary to a supplemental executive retirement plan ("SERP") established by the Company.
Retirement compensation payment, percentage of the three years' annual salary	7.50%
Executive Officer Two | Minimum
Commitments and Contingencies Disclosure [Line Items]
Annual earning of a key officer	0.9
Executive Officer Three
Commitments and Contingencies Disclosure [Line Items]
Terms of employment and compensation agreement with a key officer	One other agreement provides for an officer to receive annual minimum compensation of $0.6 per year through a three-year period ending from any date after which it is measured, adjusted annually for changes in the consumer price index (as defined) or as determined by the Company's Compensation Committee of the Board of Directors, and to receive a retirement compensation payment equal to 50% of the officer's average three years' annual salary (as defined).
Retirement compensation payment, percentage of the three years' annual salary	50.00%
Executive Officer Three | Minimum
Commitments and Contingencies Disclosure [Line Items]
Annual earning of a key officer	0.6
Real Estate
Commitments and Contingencies Disclosure [Line Items]
Operating lease, future minimum lease payments	$ 285.0