Employee Benefit Plans (Cash Flows) (Details) (USD $)		12 Months Ended					1 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Pension Plans	Dec. 31, 2012 Pension Plans	Dec. 31, 2013 Postretirement Benefit Plans	Dec. 31, 2012 Postretirement Benefit Plans	Dec. 31, 2013 Nonqualified Supplemental Retirement Plans	Jan. 31, 2013 Defined Benefit Plan Discretionary Contribution [Member] Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions		$ 10,169,000	$ 2,379,000	$ 1,578,000	$ 3,617,000		$ 3,000,000
Anticipated required or discretionary contributions during in next fiscal year						6,100,000
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2014		66,816,000		4,156,000
2015		16,572,000		4,219,000
2016		18,174,000		4,286,000
2017		22,167,000		4,362,000
2018		28,374,000		4,426,000
2019-2023		134,584,000		22,319,000
Disclosure of Expected Gross Prescription Drug Subsidy Receipts [Abstract]
Postretirement Benefits - Prescription Drug Subsidy, 2013	(212,000)
Postretirement Benefits - Prescription Drug Subsidy, 2014	(218,000)
Postretirement Benefits - Prescription Drug Subsidy, 2015	(224,000)
Postretirement Benefits - Prescription Drug Subsidy, 2016	(227,000)
Postretirement Benefits - Prescription Drug Subsidy, 2017	(231,000)
Prescription Drug Subsidy Receipts, after Year Five	$ (1,202,000)