Intangible Assets and Goodwill - Intangibles (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
Intangible assets
Store impairment charges				$ 279
Gross Amount	$ 100,869	$ 92,237	$ 100,869	92,237	$ 100,605
Definite, Accumulated Amortization	10,200	7,272	10,200	7,272	8,719
Definite, Net Amount	24,981		24,981
Net Amount	90,669	84,965	90,669	84,965	91,886
Amortization expense related to the intangible assets	700	700	1,500	1,300
Estimated amortization expense
2017 Remainder of the year	1,491		1,491
2018	2,968		2,968
2019	2,948		2,948
2020	2,929		2,929
2021	2,924		2,924
Thereafter	11,721		11,721
Total	24,981		24,981
Trade names.
Intangible assets
Gross Amount		58,337		58,337	65,480
Indefinite, Amount	65,688	58,337	65,688	58,337	65,480
Customer relationships
Intangible assets
Definite, Gross Amount	35,050	33,900	35,050	33,900	34,997
Definite, Accumulated Amortization	10,158	7,272	10,158	7,272	8,699
Definite, Net Amount	24,892	26,628	24,892	26,628	26,298
Estimated amortization expense
Total	24,892	$ 26,628	$ 24,892	$ 26,628	$ 26,298
Non compete agreements
Intangible assets
Amortization period			3 years		3 years
Definite, Gross Amount	131		$ 131		$ 128
Definite, Accumulated Amortization	42		42		20
Definite, Net Amount	89		89		108
Estimated amortization expense
Total	$ 89		$ 89		$ 108
Minimum | Customer relationships
Intangible assets
Amortization period			7 years	13 years	7 years
Maximum | Customer relationships
Intangible assets
Amortization period			15 years	15 years	15 years