Employee Benefit Plans Actuarial Assumptions (Details)	12 Months Ended																	12 Months Ended															12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013 Participants	Dec. 31, 2013 Pension Plan, Defined Benefit [Member]	Dec. 31, 2012 Pension Plan, Defined Benefit [Member]	Dec. 31, 2011 Pension Plan, Defined Benefit [Member]	Dec. 31, 2013 Pension Plan, Defined Benefit [Member] Nonunion [Member]	Dec. 31, 2012 Pension Plan, Defined Benefit [Member] Nonunion [Member]	Dec. 31, 2011 Pension Plan, Defined Benefit [Member] Nonunion [Member]	Dec. 31, 2013 Pension Plan, Defined Benefit [Member] Union [Member]	Dec. 31, 2012 Pension Plan, Defined Benefit [Member] Union [Member]	Dec. 31, 2011 Pension Plan, Defined Benefit [Member] Union [Member]	Dec. 31, 2013 Pension Plan, Defined Benefit [Member] Minimum [Member]	Dec. 31, 2012 Pension Plan, Defined Benefit [Member] Minimum [Member]	Dec. 31, 2011 Pension Plan, Defined Benefit [Member] Minimum [Member]	Dec. 31, 2013 Pension Plan, Defined Benefit [Member] Maximum [Member]	Dec. 31, 2012 Pension Plan, Defined Benefit [Member] Maximum [Member]	Dec. 31, 2011 Pension Plan, Defined Benefit [Member] Maximum [Member]	Dec. 31, 2013 Other Postretirement Benefit Plan, Defined Benefit [Member]	Dec. 31, 2012 Other Postretirement Benefit Plan, Defined Benefit [Member]	Dec. 31, 2011 Other Postretirement Benefit Plan, Defined Benefit [Member]	Dec. 31, 2013 Other Postretirement Benefit Plan, Defined Benefit [Member] Nonunion [Member]	Dec. 31, 2012 Other Postretirement Benefit Plan, Defined Benefit [Member] Nonunion [Member]	Dec. 31, 2011 Other Postretirement Benefit Plan, Defined Benefit [Member] Nonunion [Member]	Dec. 31, 2013 Other Postretirement Benefit Plan, Defined Benefit [Member] Union [Member]	Dec. 31, 2012 Other Postretirement Benefit Plan, Defined Benefit [Member] Union [Member]	Dec. 31, 2011 Other Postretirement Benefit Plan, Defined Benefit [Member] Union [Member]	Dec. 31, 2013 Other Postretirement Benefit Plan, Defined Benefit [Member] Minimum [Member]	Dec. 31, 2012 Other Postretirement Benefit Plan, Defined Benefit [Member] Minimum [Member]	Dec. 31, 2011 Other Postretirement Benefit Plan, Defined Benefit [Member] Minimum [Member]	Dec. 31, 2013 Other Postretirement Benefit Plan, Defined Benefit [Member] Maximum [Member]	Dec. 31, 2012 Other Postretirement Benefit Plan, Defined Benefit [Member] Maximum [Member]	Dec. 31, 2011 Other Postretirement Benefit Plan, Defined Benefit [Member] Maximum [Member]	Dec. 31, 2013 Equity Securities [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2012 Equity Securities [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2013 Debt Securities [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2012 Debt Securities [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2013 Domestic [Member] Equity Securities [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2012 Domestic [Member] Equity Securities [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2013 Domestic [Member] Equity Securities [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]	Dec. 31, 2012 Domestic [Member] Equity Securities [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]	Dec. 31, 2013 Domestic [Member] Debt Securities [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2012 Domestic [Member] Debt Securities [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2013 Domestic [Member] Debt Securities [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]	Dec. 31, 2012 Domestic [Member] Debt Securities [Member] Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations																																	35.00%	50.00%	65.00%	50.00%	30.00%	40.00%	50.00%	50.00%	60.00%	40.00%	40.00%	40.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum		5.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Number of members participating		800
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate												4.55%	3.55%	4.40%	4.75%	3.80%	4.55%										3.75%	2.25%	3.50%	4.20%	3.20%	4.30%
Expected rate of return on plan assets	5.80%	7.00%	7.00%	7.00%	7.25%													7.00%	7.00%	7.25%
Long-term rate of increase in compensation levels						3.58%	3.58%	3.58%	3.50%	3.50%	3.50%										3.58%	3.58%	3.58%	3.50%	3.50%	3.50%
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Health care cost trend rate assumed for current year																		8.25%
Health care cost trend rate decrease assumed for next fiscal year																			0.25%
Ultimate health care cost trend rate																		4.50%
Year that rate reaches ultimate trend rate																		2029