Goodwill and Intangible Assets - Schedule of Major Classes of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 16,518		$ 16,518		$ 16,518
Accumulated Amortization	(9,634)		(9,634)		(8,611)
Intangible Assets, net	6,884		6,884		$ 7,907
Amortization expense	512	$ 557	$ 1,000	$ 1,100
Brand
Finite-Lived Intangible Assets [Line Items]
Weighted-average Amortization (years)			14 years 1 month 6 days		14 years 1 month 6 days
Gross Carrying Amount	1,377		$ 1,377		$ 1,377
Accumulated Amortization	(353)		(353)		(311)
Intangible Assets, net	1,024		$ 1,024		$ 1,066
Carrier network
Finite-Lived Intangible Assets [Line Items]
Weighted-average Amortization (years)			5 years		5 years
Gross Carrying Amount	40		$ 40		$ 40
Accumulated Amortization	(40)		(40)		(40)
Intangible Assets, net	0		$ 0		$ 0
Distributor relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-average Amortization (years)			6 years 9 months 18 days		6 years 9 months 18 days
Gross Carrying Amount	4,059		$ 4,059		$ 4,059
Accumulated Amortization	(3,130)		(3,130)		(2,831)
Intangible Assets, net	929		$ 929		$ 1,228
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Weighted-average Amortization (years)			4 years 8 months 12 days		4 years 8 months 12 days
Gross Carrying Amount	987		$ 987		$ 987
Accumulated Amortization	(972)		(972)		(881)
Intangible Assets, net	15		$ 15		$ 106
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-average Amortization (years)			5 years 9 months 18 days		5 years 9 months 18 days
Gross Carrying Amount	1,484		$ 1,484		$ 1,484
Accumulated Amortization	(1,140)		(1,140)		(1,125)
Intangible Assets, net	344		$ 344		$ 359
Capitalized software
Finite-Lived Intangible Assets [Line Items]
Weighted-average Amortization (years)			6 years 8 months 12 days		6 years 8 months 12 days
Gross Carrying Amount	8,571		$ 8,571		$ 8,571
Accumulated Amortization	(3,999)		(3,999)		(3,423)
Intangible Assets, net	$ 4,572		$ 4,572		$ 5,148