Employee Benefit Plans (Schedule of Fair Value Measurement of Pension Plan) (Details) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets		$ 1,331	$ 1,631
Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets		90	91
Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets
Fair value [Member]
Fair value of plan assets		1,421	1,722
Large Cap Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[1]	86	96
Large Cap Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[1]
Large Cap Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[1]
Large Cap Value [Member] | Fair value [Member]
Fair value of plan assets	[1]	86	96
Large Cap Core [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[2]	114	132
Large Cap Core [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[2]
Large Cap Core [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[2]
Large Cap Core [Member] | Fair value [Member]
Fair value of plan assets	[2]	114	132
Mid Cap Core [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[3]	100	118
Mid Cap Core [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[3]
Mid Cap Core [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[3]
Mid Cap Core [Member] | Fair value [Member]
Fair value of plan assets	[3]	100	118
Small-Cap Core [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[4]	52	57
Small-Cap Core [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[4]
Small-Cap Core [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[4]
Small-Cap Core [Member] | Fair value [Member]
Fair value of plan assets	[4]	52	57
International Core [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[5]	208	271
International Core [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[5]
International Core [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[5]
International Core [Member] | Fair value [Member]
Fair value of plan assets	[5]	208	271
Large Cap Growth [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[6]	158	205
Large Cap Growth [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[6]
Large Cap Growth [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[6]
Large Cap Growth [Member] | Fair value [Member]
Fair value of plan assets	[6]	158	205
Small/Midcap Growth [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[7]	55	60
Small/Midcap Growth [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[7]
Small/Midcap Growth [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[7]
Small/Midcap Growth [Member] | Fair value [Member]
Fair value of plan assets	[7]	55	60
Fixed Income-US Core [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[8]	398	501
Fixed Income-US Core [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[8]
Fixed Income-US Core [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[8]
Fixed Income-US Core [Member] | Fair value [Member]
Fair value of plan assets	[8]	398	501
Intermediate Duration [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[9]	134	166
Intermediate Duration [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[9]
Intermediate Duration [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[9]
Intermediate Duration [Member] | Fair value [Member]
Fair value of plan assets	[9]	134	166
Common/Collective Trusts-Equity - Large Cap Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[10]
Common/Collective Trusts-Equity - Large Cap Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[10]	90	91
Common/Collective Trusts-Equity - Large Cap Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[10]
Common/Collective Trusts-Equity - Large Cap Value [Member] | Fair value [Member]
Fair value of plan assets	[10]	90	91
Money Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets	[11]	26	25
Money Market Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets	[11]
Money Market Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets	[11]
Money Market Funds [Member] | Fair value [Member]
Fair value of plan assets	[11]	$ 26	$ 25

[1] This category consists of a mutual fund holding 100-160 stocks, designed to track and outperform the Russell 1000 Value Index.

[2] This category contains stocks of the S&P 500 Index. The stocks are maintained in approximately the same weightings as the index.

[3] This category contains stocks of the MSCI U.S. Mid Cap 450 Index. The stocks are maintained in approximately the same weightings as the index.

[4] This category contains stocks whose sector weightings are maintained within a narrow band around those of the Russell 2000 Index. The portfolio will typically hold more than 150 stocks.

[5] This category consists of investments with long-term growth potential located primarily in Europe, the Pacific Basin, and other developed emerging countries.

[6] This category consists of two mutual funds, one which invests primarily of large U.S. - based growth companies, the other in fast-growing large cap growth companies with sustainable franchises and positive price momentum.

[7] This category seeks capital appreciation through investments in common stock of small-capitalization companies, defined as those with a total market value of no more than $2 billion at the time the fund first invests in them.

[8] This category currently includes equal investments in three mutual funds, two of which usually hold at least 80% of fund assets in investment grade fixed income securities, seeking to outperform the Barclays US Aggregate Bond Index while maintaining a similar duration to that Index. The third fund targets investments of 50% or more in mortgage--backed securities guaranteed by the US government and its agencies..

[9] This category consists of a mutual fund which invest in a diversified portfolio of high-quality bonds and other fixed income securities, including U.S. Government obligations, mortgage-related and asset-backed securities, corporate and municipal bonds, CMOs, and other securities mostly rated A or better.

[10] This category contains large-cap stocks with above-average yield. The portfolio typically holds between 60 and 70 stocks.

[11] This category consists of a money market fund and is used for liquidity purposes.