Employee Benefit Plans (Schedule of Fair Value of Pension Plan Assets) (Details) - Pension Benefit Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 59,370	$ 52,931	$ 51,623
Fair Value, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	59,370	52,931
Fair Value, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fair Value, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	49,439	43,623
Mutual Funds [Member] | Fair Value, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	49,439	43,623
Mutual Funds [Member] | Fair Value, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Mutual Funds [Member] | Fair Value, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	648	652
Money Market Funds [Member] | Fair Value, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	648	652
Money Market Funds [Member] | Fair Value, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Money Market Funds [Member] | Fair Value, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,283	9,283
Equity Securities [Member] | Fair Value, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,283	8,656
Equity Securities [Member] | Fair Value, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Equity Securities [Member] | Fair Value, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets