Organization And Summary Of Significant Accounting Policies Organization And Sumarry Of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accumulated Other Comprehensive Income Loss Available for Sale Securities Excluding Tax	$ 180,000
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	115,000
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(30,000)	152,000
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax		708,000
Accumulated Other Comprehensive Income Loss Tax On Interest Rate Swap	451,000	451,000
Property, Plant and Equipment [Line Items]
Depreciation	$ 13,200,000	$ 11,400,000	$ 10,000,000
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Average	40
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	4
Property, Plant and Equipment, Useful Life, Maximum	20
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	3
Property, Plant and Equipment, Useful Life, Maximum	10
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	10
Property, Plant and Equipment, Useful Life, Maximum	20
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	4
Property, Plant and Equipment, Useful Life, Maximum	25