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Derivative Instruments And Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Derivative Instruments And Hedging Activities [Abstract]
Term of interest rate swap agreements	10 years
Estimated derivatives to be reclassified as increase to interest expense	$ 3.4
Fair value of derivative net liability position	5.9
Derivative counterparty posted collateral against obligation	$ 13.9

Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset against a right to receive collateral under a master netting arrangement.

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