Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended				1 Months Ended					0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2011 2005 Facility [Member]	Jun. 30, 2011 CCS Credit Facility [Member]	Mar. 31, 2013 New Credit Facility [Member]	Nov. 30, 2012 New Credit Facility [Member]	Jun. 30, 2011 New Credit Facility [Member]	Feb. 03, 2014 Subsequent Event [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]
Significant Accounting Policies [Line Items]
Cost of sales for equipment sold	$ 9,300,000		$ 4,700,000
Customer payment terms (in days)	14 days
Maximum allocation period (in year)	1 year
Capitalized computer software costs	12,800,000		10,600,000	6,500,000
Capitalized computer software amortization expense	7,300,000		5,700,000	4,100,000
Minimum percentage of likelihood required to recognize uncertain income tax position	50.00%
Maturity of cash equivalent, max (in months)	3 months
Foreign exchange loss recognized	400,000	400,000
Foreign exchange gains recognized				600,000
Options granted have vesting range											1 year	6 years
Wrote-off deferred debt issuance costs					1,700,000	1,000,000
Debt issuance costs							1,400,000	3,000,000	7,200,000
Net deferred financing costs	6,800,000		8,100,000
Securitized accounts receivable facility	500,000,000
Maximum Undivided Ownership Interest Pooled Accounts Receivable Amount Sold	500,000,000
Deferred financing fees										500,000
Short-term debt outstanding	349,000,000		298,000,000
Premium on purchased receivables	16,400,000		19,700,000
Advertising expense	$ 12,300,000		$ 11,500,000	$ 8,900,000