Intangible Assets and Goodwill - Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Intangible assets
Store impairment charges				$ 279
Gross Amount	$ 101,375	$ 99,785	$ 101,375	99,785	$ 100,605
Definite, Accumulated Amortization	10,961	8,027	10,961	8,027	8,719
Definite, Net Amount	24,327		24,327
Net Amount	90,414	91,758	90,414	91,758	91,886
Amortization expense related to the intangible assets	700	700	2,200	2,000
Estimated amortization expense
2017 Remainder of the year	751		751
2018	2,990		2,990
2019	2,968		2,968
2020	2,947		2,947
2021	2,943		2,943
Thereafter	11,728		11,728
Total	24,327		24,327
Trade names.
Intangible assets
Gross Amount		63,667		63,667	65,480
Indefinite, Amount	66,087	63,667	66,087	63,667	65,480
Customer relationships
Intangible assets
Definite, Gross Amount	35,150	35,968	35,150	35,968	34,997
Definite, Accumulated Amortization	10,905	8,017	10,905	8,017	8,699
Definite, Net Amount	24,245	27,951	24,245	27,951	26,298
Estimated amortization expense
Total	24,245	$ 27,951	$ 24,245	$ 27,951	$ 26,298
Non compete agreements
Intangible assets
Amortization period			3 years		3 years
Definite, Gross Amount	138		$ 138		$ 128
Definite, Accumulated Amortization	56		56		20
Definite, Net Amount	82		82		108
Estimated amortization expense
Total	$ 82		$ 82		$ 108
Minimum | Customer relationships
Intangible assets
Amortization period			7 years	7 years	7 years
Maximum | Customer relationships
Intangible assets
Amortization period			15 years	15 years	15 years