Derivative Financial Instruments, Offsetting (Details) (Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Interest Rate Swap [Member]
Offsetting Derivative Assets [Abstract]
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets	$ 3,289	$ 3,025
Gross Amounts Offset in the Statement of Financial Position, Offsetting of Derivative Assets	0	0
Net Amounts of Assets presented in the Statement of Financial Position, Offsetting of Derivative Assets	3,289	3,025
Financial Instruments, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Assets	0	(347)
Cash Collateral Received, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Assets	0	0
Net Amount, Offsetting of Derivative Assets	3,289	2,678
Offsetting Derivative Liabilities [Abstract]
Gross Amounts of Recognized Liabilities, Offsetting of Derivative Liabilities	3,944	2,813
Gross Amounts Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	0	0
Net Amounts of Liabilities presented in the Statement of Financial Position, Offsetting of Derivative Liabilities	3,944	2,813
Financial Instruments, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	0	(347)
Cash Collateral Posted, Gross Amounts Not Offset in the Statement of Financial Position, Offsetting of Derivative Liabilities	1,128	0
Net Amount, Offsetting of Derivative Liabilities	$ 2,816	$ 2,466