Fair Value - Summary (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value
Cash equivalents	$ 20,997	$ 106,164
Contingent consideration	(3,200)	(8,189)
Total	(1,090,847)	(912,118)
Blueapple
Fair Value
Redeemable non-controlling interest	(974,727)	(885,986)
eService
Fair Value
Redeemable non-controlling interest	(133,917)	(124,107)
Level 1
Fair Value
Cash equivalents	20,997	106,164
Total	(953,730)	(779,822)
Level 1 | Blueapple
Fair Value
Redeemable non-controlling interest	(974,727)	(885,986)
Level 3
Fair Value
Contingent consideration	(3,200)	(8,189)
Total	(137,117)	(132,296)
Level 3 | eService
Fair Value
Redeemable non-controlling interest	$ (133,917)	$ (124,107)