Employee Benefit Plans (Plan Assets at Fair Value) (Details) - Employee Pension Plans [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 72,296	$ 75,956	$ 72,617
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20,567	23,753
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24,178	27,072
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27,551	25,131	23,724
Cash And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,654	4,693
Cash And Cash Equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,654	4,693
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,029	3,824
Fixed Income [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,029	3,824
Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,566	7,676
Equities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,566	7,676
Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,994	6,550
Mutual Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,994	6,550
Equity Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,920	7,723
Equity Partnerships [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,920	7,723
Hedge Fund Investments: Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	324	1,010
Hedge Fund Investments: Cash [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	324	1,010
Hedge Fund Investments: Long-Short Equity Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,010	28,633
Hedge Fund Investments: Long-Short Equity Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,640	15,878
Hedge Fund Investments: Long-Short Equity Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16,370	12,755	10,863
Hedge Fund Investments: Event Driven Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10,602	13,033
Hedge Fund Investments: Event Driven Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,618	3,471
Hedge Fund Investments: Event Driven Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,984	9,562	8,863
Hedge Fund Investment: Distressed Credit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	935	1,320
Hedge Fund Investment: Distressed Credit [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	935	1,320	2,199
Hedge Fund Investments: Multi-Strategy Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,262	1,494
Hedge Fund Investments: Multi-Strategy Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,262	$ 1,494	$ 1,799
Hedge Fund Investments: Private Credit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,000
Hedge Fund Investments: Private Credit [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 2,000