Employee Benefit Plans (Fair Value and Allocation Of Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified														12 Months Ended														12 Months Ended																																														12 Months Ended																																														12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Fair Value	Dec. 31, 2012 Fair Value	Dec. 31, 2013 Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Fair Value, Inputs, Level 3	Dec. 31, 2012 Fair Value, Inputs, Level 3	Dec. 31, 2013 Cash and Cash Equivalents	Dec. 31, 2012 Cash and Cash Equivalents	Dec. 31, 2013 Cash and Cash Equivalents Minimum	Dec. 31, 2012 Cash and Cash Equivalents Minimum	Dec. 31, 2013 Cash and Cash Equivalents Maximum	Dec. 31, 2012 Cash and Cash Equivalents Maximum	Dec. 31, 2013 Cash and Cash Equivalents Fair Value	Dec. 31, 2012 Cash and Cash Equivalents Fair Value	Dec. 31, 2013 Cash and Cash Equivalents Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Cash and Cash Equivalents Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Cash and Cash Equivalents Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Cash and Cash Equivalents Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Cash and Cash Equivalents Fair Value, Inputs, Level 3	Dec. 31, 2012 Cash and Cash Equivalents Fair Value, Inputs, Level 3	Dec. 31, 2013 Equity Securities	Dec. 31, 2012 Equity Securities	Dec. 31, 2013 Equity Securities Minimum	Dec. 31, 2012 Equity Securities Minimum	Dec. 31, 2013 Equity Securities Maximum	Dec. 31, 2012 Equity Securities Maximum	Dec. 31, 2013 Equity Securities Large capitalization Fair Value	Dec. 31, 2012 Equity Securities Large capitalization Fair Value	Dec. 31, 2013 Equity Securities Large capitalization Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Equity Securities Large capitalization Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Equity Securities Large capitalization Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Equity Securities Large capitalization Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Equity Securities Large capitalization Fair Value, Inputs, Level 3	Dec. 31, 2012 Equity Securities Large capitalization Fair Value, Inputs, Level 3	Dec. 31, 2013 Equity Securities Middle capitalization Fair Value	Dec. 31, 2012 Equity Securities Middle capitalization Fair Value	Dec. 31, 2013 Equity Securities Middle capitalization Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Equity Securities Middle capitalization Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Equity Securities Middle capitalization Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Equity Securities Middle capitalization Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Equity Securities Middle capitalization Fair Value, Inputs, Level 3	Dec. 31, 2012 Equity Securities Middle capitalization Fair Value, Inputs, Level 3	Dec. 31, 2013 Equity Securities Small capitalization Fair Value	Dec. 31, 2012 Equity Securities Small capitalization Fair Value	Dec. 31, 2013 Equity Securities Small capitalization Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Equity Securities Small capitalization Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Equity Securities Small capitalization Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Equity Securities Small capitalization Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Equity Securities Small capitalization Fair Value, Inputs, Level 3	Dec. 31, 2012 Equity Securities Small capitalization Fair Value, Inputs, Level 3	Dec. 31, 2013 Equity Securities International equity (developed) Fair Value	Dec. 31, 2012 Equity Securities International equity (developed) Fair Value	Dec. 31, 2013 Equity Securities International equity (developed) Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Equity Securities International equity (developed) Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Equity Securities International equity (developed) Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Equity Securities International equity (developed) Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Equity Securities International equity (developed) Fair Value, Inputs, Level 3	Dec. 31, 2012 Equity Securities International equity (developed) Fair Value, Inputs, Level 3	Dec. 31, 2013 Equity Securities International equity (emerging) Fair Value	Dec. 31, 2012 Equity Securities International equity (emerging) Fair Value	Dec. 31, 2013 Equity Securities International equity (emerging) Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Equity Securities International equity (emerging) Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Equity Securities International equity (emerging) Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Equity Securities International equity (emerging) Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Equity Securities International equity (emerging) Fair Value, Inputs, Level 3	Dec. 31, 2012 Equity Securities International equity (emerging) Fair Value, Inputs, Level 3	Dec. 31, 2013 Fixed Income Investments	Dec. 31, 2012 Fixed Income Investments	Dec. 31, 2013 Fixed Income Investments Minimum	Dec. 31, 2012 Fixed Income Investments Minimum	Dec. 31, 2013 Fixed Income Investments Maximum	Dec. 31, 2012 Fixed Income Investments Maximum	Dec. 31, 2013 Fixed Income Investments Investment grade bonds Fair Value	Dec. 31, 2012 Fixed Income Investments Investment grade bonds Fair Value	Dec. 31, 2013 Fixed Income Investments Investment grade bonds Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Fixed Income Investments Investment grade bonds Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Fixed Income Investments Investment grade bonds Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Fixed Income Investments Investment grade bonds Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Fixed Income Investments Investment grade bonds Fair Value, Inputs, Level 3	Dec. 31, 2012 Fixed Income Investments Investment grade bonds Fair Value, Inputs, Level 3	Dec. 31, 2013 Fixed Income Investments Intermediate bonds Fair Value	Dec. 31, 2012 Fixed Income Investments Intermediate bonds Fair Value	Dec. 31, 2013 Fixed Income Investments Intermediate bonds Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Fixed Income Investments Intermediate bonds Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Fixed Income Investments Intermediate bonds Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Fixed Income Investments Intermediate bonds Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Fixed Income Investments Intermediate bonds Fair Value, Inputs, Level 3	Dec. 31, 2012 Fixed Income Investments Intermediate bonds Fair Value, Inputs, Level 3	Dec. 31, 2013 Fixed Income Investments High-yield corporate bonds Fair Value	Dec. 31, 2012 Fixed Income Investments High-yield corporate bonds Fair Value	Dec. 31, 2013 Fixed Income Investments High-yield corporate bonds Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Fixed Income Investments High-yield corporate bonds Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Fixed Income Investments High-yield corporate bonds Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Fixed Income Investments High-yield corporate bonds Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Fixed Income Investments High-yield corporate bonds Fair Value, Inputs, Level 3	Dec. 31, 2012 Fixed Income Investments High-yield corporate bonds Fair Value, Inputs, Level 3	Dec. 31, 2013 Fixed Income Investments U. S. Treasury Fair Value	Dec. 31, 2012 Fixed Income Investments U. S. Treasury Fair Value	Dec. 31, 2013 Fixed Income Investments U. S. Treasury Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Fixed Income Investments U. S. Treasury Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Fixed Income Investments U. S. Treasury Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Fixed Income Investments U. S. Treasury Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Fixed Income Investments U. S. Treasury Fair Value, Inputs, Level 3	Dec. 31, 2012 Fixed Income Investments U. S. Treasury Fair Value, Inputs, Level 3	Dec. 31, 2013 Fixed Income Investments International emerging bond Fair Value	Dec. 31, 2012 Fixed Income Investments International emerging bond Fair Value	Dec. 31, 2013 Fixed Income Investments International emerging bond Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Fixed Income Investments International emerging bond Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Fixed Income Investments International emerging bond Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Fixed Income Investments International emerging bond Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Fixed Income Investments International emerging bond Fair Value, Inputs, Level 3	Dec. 31, 2012 Fixed Income Investments International emerging bond Fair Value, Inputs, Level 3	Dec. 31, 2013 Alternative investments	Dec. 31, 2012 Alternative investments	Dec. 31, 2013 Alternative investments Minimum	Dec. 31, 2012 Alternative investments Minimum	Dec. 31, 2013 Alternative investments Maximum	Dec. 31, 2012 Alternative investments Maximum	Dec. 31, 2013 Alternative investments Commodities Investment Fair Value	Dec. 31, 2012 Alternative investments Commodities Investment Fair Value	Dec. 31, 2013 Alternative investments Commodities Investment Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Alternative investments Commodities Investment Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Alternative investments Commodities Investment Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Alternative investments Commodities Investment Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Alternative investments Commodities Investment Fair Value, Inputs, Level 3	Dec. 31, 2012 Alternative investments Commodities Investment Fair Value, Inputs, Level 3	Dec. 31, 2013 Alternative investments Hedge Funds Fair Value	Dec. 31, 2012 Alternative investments Hedge Funds Fair Value	Dec. 31, 2013 Alternative investments Hedge Funds Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2012 Alternative investments Hedge Funds Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)	Dec. 31, 2013 Alternative investments Hedge Funds Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2012 Alternative investments Hedge Funds Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)	Dec. 31, 2013 Alternative investments Hedge Funds Fair Value, Inputs, Level 3	Dec. 31, 2012 Alternative investments Hedge Funds Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 524,017	$ 463,005	$ 429,505	$ 524,017	$ 463,005	$ 380,540	$ 304,132	$ 143,477	$ 158,873	$ 0	$ 0							$ 2,517	$ 3,088	$ 2,517	$ 3,088	$ 0	$ 0	$ 0	$ 0							$ 218,023	$ 172,512	$ 218,023	$ 172,512	$ 0	$ 0	$ 0	$ 0	$ 10,724	$ 21,451	$ 10,724	$ 21,451	$ 0	$ 0	$ 0	$ 0	$ 43,928	$ 31,053	$ 43,928	$ 31,053	$ 0	$ 0	$ 0	$ 0	$ 10,535	$ 9,537	$ 10,535	$ 9,537	$ 0	$ 0	$ 0	$ 0	$ 40,643	$ 24,276	$ 40,643	$ 24,276	$ 0	$ 0	$ 0	$ 0							$ 74,501	$ 71,986	$ 0	$ 0	$ 74,501	$ 71,986	$ 0	$ 0	$ 48,746	$ 59,052	$ 0	$ 0	$ 48,746	$ 59,052	$ 0	$ 0	$ 10,111	$ 18,487	$ 0	$ 0	$ 10,111	$ 18,487	$ 0	$ 0	$ 4,395	$ 7,613	$ 4,395	$ 7,613	$ 0	$ 0	$ 0	$ 0	$ 10,119	$ 9,348	$ 0	$ 0	$ 10,119	$ 9,348	$ 0	$ 0							$ 19,014	$ 17,376	$ 19,014	$ 17,376	$ 0	$ 0	$ 0	$ 0	$ 30,761	$ 17,226	$ 30,761	$ 17,226			$ 0	$ 0
Cash and equivalents Target Allocation														0.00%	0.00%	1.00%	1.00%											55.00%	55.00%	65.00%	65.00%																																											25.00%	36.00%	40.00%	44.00%																																											0.00%	0.00%	10.00%	8.00%
Cash and equivalents Actual % of Plan Assets	100.00%	100.00%										1.00%	1.00%													62.00%	56.00%																																													28.00%	36.00%																																													10.00%	8.00%