Derivative Instruments (Derivative Assets Offset in The Consolidated Balance Sheets) (Details) (Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015
Interest Rate Swap [Member]
Offsetting Assets [Line Items]
Gross amounts of recognized assets	$ 11,932
Net Amounts of Assets presented in the Statement of Financial Position	11,932
Fair Value of collateral	11,932
Total Gross amounts not offset in the statement of financial position including applicable netting agreement and fair value of collateral	11,932
Net Amount	$ 0

Fair value, after the effects of master netting arrangements, of a financial asset or other 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. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after offset of derivative liability, of financial asset or other 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, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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