Commitments and Contingencies (Swapped Variable Cost for Fixed Cost and Terms of Interest Rate Swap Agreements) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Forward-Starting Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount		$ 50,000	$ 50,000
Derivative, Fair Value, Net	[1]	(389)	(576)
Forward-Starting Interest Rate Swap [Member] | Contract, One
Derivative [Line Items]
Notional Amount		$ 25,000
Trade Date		Feb. 25, 2015
Maturity Date		Feb. 25, 2018
Fixed Rate Paid		1.54%
Derivative, Fair Value, Net	[1]	$ (152)	(230)
Forward-Starting Interest Rate Swap [Member] | Contract, Two
Derivative [Line Items]
Notional Amount		$ 25,000
Trade Date		Feb. 25, 2015
Maturity Date		Feb. 25, 2019
Fixed Rate Paid		1.74%
Derivative, Fair Value, Net	[1]	$ (237)	(346)
Interest rate swaps
Derivative [Line Items]
Notional Amount		43,000	43,000
Derivative, Fair Value, Net	[2]	(8,372)	(9,229)
Interest rate swaps | Contract, One
Derivative [Line Items]
Notional Amount		$ 10,000
Trade Date		Mar. 18, 2009
Maturity Date		Jun. 30, 2021
Fixed Rate Paid		5.09%
Derivative, Fair Value, Net	[2]	$ (806)	(1,038)
Interest rate swaps | Contract, Two
Derivative [Line Items]
Notional Amount		$ 10,000
Trade Date		Jul. 08, 2009
Maturity Date		Jun. 30, 2029
Fixed Rate Paid		5.84%
Derivative, Fair Value, Net	[2]	$ (2,321)	(2,537)
Interest rate swaps | Contract, Three
Derivative [Line Items]
Notional Amount		$ 10,000
Trade Date		May 06, 2010
Maturity Date		Jun. 30, 2030
Fixed Rate Paid		5.71%
Derivative, Fair Value, Net	[2]	$ (2,290)	(2,477)
Interest rate swaps | Contract, Four
Derivative [Line Items]
Notional Amount		$ 5,000
Trade Date		Mar. 14, 2011
Maturity Date		Mar. 30, 2031
Fixed Rate Paid		4.35%
Derivative, Fair Value, Net	[2]	$ (1,211)	(1,301)
Interest rate swaps | Contract, Five
Derivative [Line Items]
Notional Amount		$ 8,000
Trade Date		May 04, 2011
Maturity Date		Jul. 07, 2031
Fixed Rate Paid		4.14%
Derivative, Fair Value, Net	[2]	$ (1,744)	$ (1,876)

[1] (1) Presented within accrued interest and other liabilities on the consolidated statements of condition.

[2] Presented within accrued interest and other liabilities on the consolidated statements of condition.