Property and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property and Equipment, net
Property, Plant and Equipment, Gross	$ 273,541	$ 288,274
Less: accumulated depreciation and amortization	(142,781)	(138,549)
Property and equipment, net	130,760	149,725
Lease incentives	10,400
Amortization of tenant improvements reimbursement	100
Non-cash lease incentive	700
Depreciation expense	23,700	23,300	$ 23,800
Land
Property and Equipment, net
Property, Plant and Equipment, Gross	6,248	11,512
Buildings and improvements
Property and Equipment, net
Property, Plant and Equipment, Gross	7,669	11,032
Leasehold improvements - inclusive of right to use assets
Property and Equipment, net
Property, Plant and Equipment, Gross	92,168	102,867
Furniture and equipment
Property and Equipment, net
Property, Plant and Equipment, Gross	91,449	79,046
Rental vehicles
Property and Equipment, net
Property, Plant and Equipment, Gross		1,228
Software
Property and Equipment, net
Property, Plant and Equipment, Gross	71,509	75,248
Systems development and construction in progress
Property and Equipment, net
Property, Plant and Equipment, Gross	$ 4,498	$ 7,341