Business Acquisitions (Net Assets Acquired) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Recognized controlling ownership of joint venture	$ 27,778	$ 11,293
Goodwill	233,095	35,787
EbixHealth JV, Hope, Wdev, and PB Systems [Member]
Business Acquisition [Line Items]
Cash		10,992
Equity instruments		2,763
Contingent earn-out consideration arrangement (net)		5,785
Business Combination, Contingent Consideration deposited in escrow account		0
Previous cash and other consideration in investment of EbixHealth JV		8,000
Total consideration transferred		27,540
Other Nonoperating Income		1,162
Recognized controlling ownership of joint venture		11,223
Business Combination, Equity Components Recorded		12,385
Business Combination, Total consideration transferred and equity components recorded		39,925
Cash		2,333
Short term investments acquired from Acquisition		0
Restricted Cash Acquired from Acquisition		8,175
Current assets		6,282
Property and equipment		842
Other assets		7
Intangible assets, definite lived		(3,184)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Capitalized Software Costs		0
Deferred tax liability		1,972
Current and other liabilities		(16,587)
Net assets acquired		(160)
Goodwill		40,085
Total net assets acquired		$ 39,925
Oakstone, EbixHealth JV, IHAC(Hope), WDEV [Member], Itzcash, beBetter, Youirst, Wallstreet, Paul Merchants, and Via [Member]
Business Acquisition [Line Items]
Cash	211,143
Equity instruments	0
Contingent earn-out consideration arrangement (net)	30,149
Business Combination, Contingent Consideration deposited in escrow account	4,040
Previous cash and other consideration in investment of EbixHealth JV	0
Total consideration transferred	245,332
Other Nonoperating Income	0
Recognized controlling ownership of joint venture	27,625
Business Combination, Equity Components Recorded	27,625
Business Combination, Total consideration transferred and equity components recorded	272,957
Cash	18,982
Short term investments acquired from Acquisition	24,206
Restricted Cash Acquired from Acquisition	4,040
Current assets	39,680
Property and equipment	1,018
Other assets	1,683
Intangible assets, definite lived	11,267
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	11,168
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Capitalized Software Costs	1,705
Deferred tax liability	(3,405)
Current and other liabilities	(58,324)
Net assets acquired	52,020
Goodwill	220,937
Total net assets acquired	$ 272,957