Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Qualified and Non-Qualified Pension Plans
Cash flows
Employer's contribution		$ 14,300,000
Benefit obligation	0		0
Benefits Paid	51,000,000	10,800,000
Annuities paid	7,000,000	18,100,000
Components of Net Periodic Benefit Cost
Interest Cost	922,000	2,826,000
Expected return on plan assets	(1,747,000)	(4,103,000)
Settlement	7,007,000	5,523,000
Amortization of prior service cost	221,000	1,046,000
Amortization of net loss	13,082,000	10,527,000
Net periodic pension cost	19,485,000	15,819,000
Change in Benefit Obligation
Benefit Obligation at Beginning of Year			0
Interest Cost	922,000	2,826,000
Benefits Paid	(51,000,000)	(10,800,000)
Benefit Obligation at End of Year	0		0
Qualified Pension Plan
Pension and Other Postretirement Benefits
Accrued additional benefits			0
Cash flows
Employer's contribution	11,300,000	7,000,000
Non-qualified pension plans
Pension and Other Postretirement Benefits
Accrued additional benefits			0
Cash flows
Employer's contribution		$ 7,300,000