Derivative Financial Instruments - Balance Sheet Category and Fair Value for Cash Flow Hedges (Details) - Other Liabilities [Member] - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Nov. 07, 2013
Interest Rate Swap 1 [Member]
Derivatives, Fair Value [Line Items]
Notional Amount			$ 25,000,000.00
Interest Rate Swap 2 [Member]
Derivatives, Fair Value [Line Items]
Notional Amount			$ 25,000,000.00
Designated as Hedging Instrument [Member] | Interest Rate Swap 1 [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 25,000,000	$ 25,000,000
Fair Value	(582,000)	(1,097,000)
Designated as Hedging Instrument [Member] | Interest Rate Swap 2 [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	25,000,000	25,000,000
Fair Value	$ (2,237,000)	$ (2,841,000)