Property and Equipment (Components Of Property and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 160,664	$ 151,016
Less: Accumulated depreciation	(98,740)	(86,373)
Property and equipment, net	61,924	64,643
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	78,932	75,500
Computer Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	33,710	30,007
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	25,041	24,526
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	12,621	10,368
Furniture
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,601	8,475
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,759	$ 2,140
Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	1 year
Minimum [Member] | Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	1 year
Minimum [Member] | Computer Software
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	1 year
Minimum [Member] | Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	10 years
Minimum [Member] | Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	1 year
Minimum [Member] | Furniture
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	40 years
Maximum [Member] | Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	10 years
Maximum [Member] | Computer Software
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	5 years
Maximum [Member] | Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	40 years
Maximum [Member] | Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	15 years
Maximum [Member] | Furniture
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (years)	13 years