Organization and Summary of Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Apr. 30, 2015
Accounting Policies [Line Items]
Depreciation and amortization	$ 15,000,000	$ 12,800,000	$ 11,300,000
Vendor-Specific Objective Evidence (VSOE) exist when (approximately 80% or more) standalone sales are within a reasonable price range	80.00%
Transferred non-recourse accounts receivables	$ 28,700,000	38,600,000	62,000,000
Accounts receivables from third-party leasing companies for transferred non-recourse accounts receivables	200,000	800,000	1,100,000
Commissions expense	22,000,000	13,700,000	14,000,000
Wells Fargo Bank, National Association
Accounting Policies [Line Items]
Debt issuance cost, gross	$ 7,949,000
Internal use software and development costs
Accounting Policies [Line Items]
Useful life	5 years
Software and development costs to be sold
Accounting Policies [Line Items]
Cost of revenues for amortization of capitalized software development cost	$ 7,100,000	5,800,000	4,400,000
Minimum
Accounting Policies [Line Items]
Vendor-Specific Objective Evidence, within a reasonably narrow price range (plus or minus of median rate)	15.00%
Estimated useful lives of assets	1 year
Minimum | Computer Equipment [Member]
Accounting Policies [Line Items]
Useful life	3 years
Minimum | Furniture and Fixtures
Accounting Policies [Line Items]
Useful life	5 years
Minimum | Equipment
Accounting Policies [Line Items]
Useful life	3 years
Maximum
Accounting Policies [Line Items]
Vendor-Specific Objective Evidence, within a reasonably narrow price range (plus or minus of median rate)	15.00%
Estimated useful lives of assets	30 years
Maximum | Computer Equipment [Member]
Accounting Policies [Line Items]
Useful life	5 years
Maximum | Furniture and Fixtures
Accounting Policies [Line Items]
Useful life	7 years
Maximum | Equipment
Accounting Policies [Line Items]
Useful life	12 years
Selling, general and administrative
Accounting Policies [Line Items]
Shipping and handling expenses	$ 12,100,000	8,500,000	7,400,000
Capitalized software costs included in property and equipment | Internal use software and development costs
Accounting Policies [Line Items]
Software development costs capitalized	2,200,000	1,200,000
Capitalized software costs included in other assets | Software and development costs to be sold
Accounting Policies [Line Items]
Software development costs capitalized	14,300,000	12,100,000
Primary Supplier
Accounting Policies [Line Items]
Minimum supplier purchase obligations	$ 0
Notice of termination, time upon delivery	2 months
Payments to suppliers	$ 47,900,000	$ 41,700,000	$ 34,500,000
Credit Concentration Risk | Lease Receivable
Accounting Policies [Line Items]
Percentage of lease receivable balance	45.00%
Avantec Heathcare Limited
Accounting Policies [Line Items]
Percentage of interest acquired				85.00%