Derivative Instruments (Derivative Assets Offset in The Consolidated Balance Sheets) (Details) - Not Designated as Hedging Instrument [Member] - Interest Rate Swap [Member] $ in Thousands	Mar. 31, 2016 USD ($)
Offsetting Assets [Line Items]
Gross amounts of recognized assets	$ 22,332
Net Amounts of Assets presented in the Statement of Financial Position	22,332
Fair Value of collateral	22,332
Total Gross amounts not offset in the statement of financial position including applicable netting agreement and fair value of collateral	22,332
Net Amount	$ 0