Property And Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Cost	$ 547,179	$ 537,009
Accumulated Depreciation	(375,581)	(335,955)
Net	171,598	201,054
Depreciation expense	49,800	54,400	$ 50,600
Land [Member]
Property, Plant and Equipment [Line Items]
Cost	6,291	5,335
Accumulated Depreciation	0	0
Net	6,291	5,335
Buildings And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	240,295	237,247
Accumulated Depreciation	(160,865)	(146,698)
Net	79,430	90,549
Furniture Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	156,196	155,150
Accumulated Depreciation	(126,065)	(114,577)
Net	30,131	40,573
Computer Software Intangible Asset [Member]
Property, Plant and Equipment [Line Items]
Cost	144,397	139,277
Accumulated Depreciation	(88,651)	(74,680)
Net	$ 55,746	$ 64,597