Segment Information - Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Segments Information
Assets	$ 2,266,416	$ 1,563,765
Operating Segments
Segments Information
Assets	1,879,169	1,387,939
Corporate, Non-Segment
Segments Information
Assets	387,247	175,826
Consumer services and plans | Operating Segments
Segments Information
Assets	116,233	152,689
Retail | Operating Segments
Segments Information
Assets	$ 1,762,936	$ 1,235,250