Furniture, Equipment and Leasehold Improvements, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Furniture, equipment and leasehold improvements [Abstract]
Furniture, equipment and leasehold improvements, gross	$ 787,768	$ 792,100
Less: Accumulated depreciation and amortization	(627,408)	(631,144)
Furniture, equipment and leasehold improvements, net	160,360	160,956
Furniture and Equipment [Member]
Furniture, equipment and leasehold improvements [Abstract]
Furniture, equipment and leasehold improvements, gross	529,488	532,512
Leasehold Improvements [Member]
Furniture, equipment and leasehold improvements [Abstract]
Furniture, equipment and leasehold improvements, gross	$ 258,280	$ 259,588