Fair Value - Summary (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value
Cash equivalents	$ 11,731	$ 106,164
Contingent consideration	(5,044)	(8,189)
Total	(1,241,761)	(912,118)
Blueapple
Fair Value
Redeemable non-controlling interest	(1,116,589)	(885,986)
eService
Fair Value
Redeemable non-controlling interest	(131,859)	(124,107)
Level 1
Fair Value
Cash equivalents	11,731	106,164
Total	(1,104,858)	(779,822)
Level 1 | Blueapple
Fair Value
Redeemable non-controlling interest	(1,116,589)	(885,986)
Level 3
Fair Value
Contingent consideration	(5,044)	(8,189)
Total	(136,903)	(132,296)
Level 3 | eService
Fair Value
Redeemable non-controlling interest	$ (131,859)	$ (124,107)