Segment Information - Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Segments Information
Assets	$ 1,811,919	$ 1,563,765
Operating Segments
Segments Information
Assets	1,588,647	1,387,939
Corporate, Non-Segment
Segments Information
Assets	223,272	175,826
Consumer services and plans | Operating Segments
Segments Information
Assets	129,539	152,689
Retail | Operating Segments
Segments Information
Assets	$ 1,459,108	$ 1,235,250