Fixed Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation	$ 20,890	$ 20,895	$ 17,485
Property, Plant and Equipment, Gross	205,184	195,308
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(123,431)	(110,640)
Property, Plant and Equipment, Net	81,753	84,668
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	169,682	161,539
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	32,132	30,030
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 3,370	$ 3,739