Business Combinations (Narrative) (Details) $ in Thousands					3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 02, 2016 USD ($)	Sep. 02, 2015 USD ($)	Jun. 02, 2015 USD ($)	Mar. 02, 2015	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($) Companies	Jul. 01, 2016 USD ($)	Sep. 01, 2015	Jun. 01, 2015 USD ($)	Mar. 01, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Recognized controlling ownership of joint venture							$ 11,293
Other Nonoperating Income (Expense)					$ 1,162	$ 0	$ 1,162	$ 0
Document Period End Date							Sep. 30, 2016
Reduction of acquisition earnout accruals							$ (1,726)	(1,533)
Derivative Liability					1,621		1,621		$ 1,621	$ 4,277					$ 5,367
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability					2,390			$ 1,533
Goodwill, Purchase Accounting Adjustments							4,298			(2,099)
Business acquisition, contingent consideration, at fair value, noncurrent					0		0		0	2,571
Business acquisition, contingent consideration, at fair value, current					1,621		1,621		1,621	1,706
Goodwill					428,063		428,063		428,063	$ 402,259					$ 402,220
Via Media Health and PB Systems [Member]
Business Acquisition [Line Items]
Number of businesses acquired | Companies										2
Via Media Health [Member]
Business Acquisition [Line Items]
Purchase Price of Business Acquisition, Cost of Acquired Entity														$ 1,000
Derivative Liability					0		0		0
PB Systems [Member]
Business Acquisition [Line Items]
Derivative Liability					0		0		0
Deferred Tax Liability, Purchase Accounting Adjustment					(657)		3,200
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability							700		(4,400)
Goodwill, Purchase Accounting Adjustments							4,300		(1,600)
Derivative, Term of Contract			24 months
Payments to Acquire Businesses, Gross			$ 12,400
PB Systems [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Purchase Accounting Adjustments							8,200		(1,600)
PB Systems [Member] | Developed technology [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Purchase Accounting Adjustments									(1,800)
Maximum [Member] | Via Media Health [Member]
Business Acquisition [Line Items]
Derivative Liability														$ 372
Derivative, Term of Contract				24 months
Maximum [Member] | PB Systems [Member]
Business Acquisition [Line Items]
Derivative Liability													$ 8,000
Minimum [Member] | Via Media Health [Member]
Business Acquisition [Line Items]
Derivative, Term of Contract				12 months
Performance Bonus [Member] | Via Media Health [Member]
Business Acquisition [Line Items]
Derivative Liability													$ 1,000
Contingent accrued earn-out acquisition consideration [Member]
Business Acquisition [Line Items]
Derivative Liability					1,621		1,621		1,621	$ 4,277
Business acquisition, contingent consideration, at fair value, noncurrent					0		0		0	2,600
Business acquisition, contingent consideration, at fair value, current					$ 1,600		1,600		$ 1,600	$ 1,700
EbixHealth JV [Member]
Business Acquisition [Line Items]
Recognized controlling ownership of joint venture							$ 11,293
Goodwill											$ 21,789
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%