Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Land		$ 24,300	$ 24,861
Buildings and Improvements		76,982	83,053
Leasehold Improvements and Signs		98,435	107,380
Fixtures and Equipment	[1]	223,382	196,965
Construction in Progress		3,853	2,086
Property, Plant and Equipment, Gross		448,588	435,482
Less: Accumulated Depreciation and Amortization		(222,752)	(216,065)
Property, Plant and Equipment, Net		225,836	219,417
Related Party
Property, Plant and Equipment [Line Items]
Assets Under Capital Leases:		10,573	10,573
Non-Related Party
Property, Plant and Equipment [Line Items]
Assets Under Capital Leases:		$ 11,063	$ 10,564

[1] Includes internal-use software development costs of $60.7 million and $50.3 million as of December 31, 2015 and 2014, respectively. Accumulated amortization of internal-use software development costs amounted to $22.2 million and $14.8 million as of December 31, 2015 and 2014, respectively.