Property And Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Cost	$ 617,374,000	$ 559,846,000
Accumulated Depreciation	(356,151,000)	(298,075,000)
Net	261,223,000	261,771,000
Depreciation expense	67,600,000	65,900,000	47,900,000
Land [Member]
Property, Plant and Equipment [Line Items]
Cost	5,335,000	5,335,000
Accumulated Depreciation	0	0
Net	5,335,000	5,335,000
Buildings And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	249,812,000	230,665,000
Accumulated Depreciation	(143,246,000)	(124,690,000)
Net	106,566,000	105,975,000
Furniture Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	175,620,000	155,118,000
Accumulated Depreciation	(117,256,000)	(100,139,000)
Net	58,364,000	54,979,000
Computer Software Intangible Asset [Member]
Property, Plant and Equipment [Line Items]
Cost	186,607,000	168,728,000
Accumulated Depreciation	(95,649,000)	(73,246,000)
Net	$ 90,958,000	$ 95,482,000