Commitments and Contingencies (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Lease Commitments
Rental expense under operating leases		$ 3,900	$ 3,800	$ 3,800
Future minimum lease commitments on non-cancelable operating leases
2018		2,915
2019		1,836
2020		894
2021		420
2022		202
Thereafter		39
Total		6,306
Cash payment schedule associated with lease obligation
2018		5,471
2019		5,594
2020		5,719
2021		5,848
2022		5,980
Thereafter		92,020
Total lease payments		120,632
Less interest portion		(72,918)
Sales leaseback obligation		47,714	$ 47,586
Purchase Commitments
Non-cancelable contracts and purchase orders for inventory		83,500
Sale leaseback obligation | Land and buildings | Beverly Property Owner LLC
Cash payment schedule associated with lease obligation
Sales leaseback obligation		$ 47,700
Purchase Commitments
Lease term	22 years