Business Combinations (Narrative) (Details) $ in Thousands						3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 01, 2017 USD ($)	Apr. 01, 2017 USD ($)	Nov. 02, 2016 USD ($)	Jul. 02, 2016 USD ($)	Sep. 02, 2015 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2017 USD ($) Companies	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) Companies	Nov. 01, 2016 USD ($)	Jul. 01, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 01, 2015
Business Acquisition [Line Items]
Recognized controlling ownership of joint venture							$ 27,586
Other Nonoperating Income (Expense)									$ 1,162
Document Period End Date							Jun. 30, 2017
Number of Businesses Acquired | Companies							2		3
Reduction of acquisition earnout accruals							$ 0	$ (511)
Derivative Liability						$ 39,460	39,460		$ 8,510			$ 4,277
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability						0		$ 1,175
Goodwill, Purchase Accounting Adjustments							(1,632)		4,298
Business acquisition, contingent consideration, at fair value, noncurrent						33,438	33,438		6,589
Business acquisition, contingent consideration, at fair value, current						6,022	6,022		1,921
Goodwill						557,502	557,502		441,404			$ 402,259
Fair Value of Joint Venture, excluding Noncontrolling Interest		$ 120,000
Fair Value of Joint Venture, including Noncontrolling Interest		150,000
beBetter [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 1,000
Derivative, Term of Contract	24 months
ItzCash [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		$ 76,300
Derivative, Term of Contract		36 months
Payments to Acquire Business, Held in Escrow		$ 4,000
Escrow Derivative, Term of Contract		12 months
WDEV [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross			$ 10,500
Derivative, Term of Contract			38 months
Payments to Acquire Business, Held in Escrow			$ 2,900
Escrow Derivative, Term of Contract			38 months
Hope [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross			$ 1,720
Maximum [Member] | beBetter [Member]
Business Acquisition [Line Items]
Derivative Liability	$ 2,000
Maximum [Member] | ItzCash [Member]
Business Acquisition [Line Items]
Derivative Liability		$ 44,000
Maximum [Member] | WDEV [Member]
Business Acquisition [Line Items]
Derivative Liability										$ 15,700
Contingent accrued earn-out acquisition consideration [Member]
Business Acquisition [Line Items]
Derivative Liability						39,460	39,460		8,510
Business acquisition, contingent consideration, at fair value, noncurrent						33,400	33,400		6,600
Business acquisition, contingent consideration, at fair value, current						$ 6,000	6,000		$ 1,900
ItzCash [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage		80.00%
EbixHealth JV [Member]
Business Acquisition [Line Items]
Recognized controlling ownership of joint venture							$ 11,293
Goodwill											$ 20,838
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill											$ 1,463
Equity Method Investment, Ownership Percentage Increase (Decrease)				11.00%
Payments to Acquire Interest in Joint Venture				$ 2,000	$ 6,000
Equity Method Investment, Ownership Percentage											51.00%		40.00%