Summary of Significant Accounting Policies - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Nov. 30, 2014 USD ($)	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Nov. 14, 2014 USD ($)
Significant Accounting Policies [Line Items]
Cost of sales for equipment sold		$ 91,600,000	$ 84,100,000	$ 13,200,000
Customer payment terms (in days)		14 days
Period due for allowance on accounts receivable		30 days
Period past due for accounts receivable deemed as uncollectible		40 days
Maximum allocation period (in year)		1 year
Capitalized computer software costs		$ 33,100,000	23,400,000	17,700,000
Capitalized computer software amortization expense		$ 17,700,000	11,600,000	9,200,000
Minimum percentage of likelihood required to recognize uncertain income tax position		50.00%
Maturity of cash equivalent, max (in months)		3 months
Foreign exchange gain (loss) recognized		$ (2,800,000)	(2,400,000)	1,400,000
Deferred financing costs		13,100,000	18,100,000
Maximum undivided ownership interest pooled accounts receivable amount sold		950,000,000
Short-term debt outstanding		591,000,000	614,000,000
Advertising expense		$ 22,200,000	$ 19,900,000	$ 14,400,000
Number of reportable segments | segment		2
Securitization Facility
Significant Accounting Policies [Line Items]
Payments of debt issuance costs					$ 3,100,000
Securitized accounts receivable facility		$ 500,000,000
Securitization Facility | Second Amendment
Significant Accounting Policies [Line Items]
Securitized accounts receivable facility		950,000,000
New Credit Facility
Significant Accounting Policies [Line Items]
Debt issuance costs	$ 15,800,000
Debt issuance costs capitalized	$ 9,200,000
Payments of debt issuance costs		$ 2,300,000
Minimum | Stock Options
Significant Accounting Policies [Line Items]
Period of vesting provisions (in years)		1 year
Maximum | Stock Options
Significant Accounting Policies [Line Items]
Period of vesting provisions (in years)		6 years
Customer Concentration Risk
Significant Accounting Policies [Line Items]
Period past due for accounts receivable deemed as uncollectible		90 days
Period past due for allowance of trade accounts receivable maximum		90 days
Customer Concentration Risk | Accounts Receivable
Significant Accounting Policies [Line Items]
Concentration risk, percentage		95.00%	98.00%
Accounting Standards Update 2015-03 | Short-term Debt
Significant Accounting Policies [Line Items]
Deferred financing costs			$ 600,000
Accounting Standards Update 2015-03 | Long-term Debt
Significant Accounting Policies [Line Items]
Deferred financing costs			1,500,000
Masternaut Group Holdings Limited
Significant Accounting Policies [Line Items]
Non-cash impairment charge on equity method investment		$ 36,100,000	$ 40,000,000