Goodwill and Other Intangible Assets (Schedule Of Components Of Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 73,730	$ 73,730
Accumulated Amortization	(33,622)	(32,127)
Total	40,108	41,603
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	51,755	51,755
Accumulated Amortization	(25,721)	(24,494)
Total	26,034	27,261
Useful Lives (in years)	11 years	11 years
Trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,400	15,400
Accumulated Amortization	(3,369)	(3,208)
Total	12,031	12,192
Useful Lives (in years)	24 years	24 years
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,300	4,300
Accumulated Amortization	(2,257)	(2,150)
Total	2,043	2,150
Useful Lives (in years)	10 years	10 years
Favorable leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,725	1,725
Accumulated Amortization	(1,725)	(1,725)
Total	0	0
Useful Lives (in years)	3 years	3 years
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	550	550
Accumulated Amortization	(550)	(550)
Total	$ 0	$ 0
Useful Lives (in years)	2 years	2 years