Segment Information - Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segments Information
Assets	$ 1,563,765	$ 1,338,105	$ 1,157,255
Adjustment
Segments Information
Assets		(5,913)	(5,913)
Operating Segments
Segments Information
Assets	1,387,939	1,282,980	1,084,635
Corporate, Non-Segment
Segments Information
Assets	175,826	55,125	72,620
Consumer services and plans | Operating Segments
Segments Information
Assets	152,689	139,064	138,240
Retail | Operating Segments
Segments Information
Assets	$ 1,235,250	1,143,916	946,395
Retail | Operating Segments | Adjustment
Segments Information
Assets		$ (5,900)	$ (5,900)