Employee Benefit Plans (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Reclassification of Rabbi Trust investments	$ 3,400,000
Pension Plans
Components of net periodic benefit cost:
Service cost	0	1,635,000
Interest cost	204,000	1,413,000
Expected long-term return on assets	0	(1,460,000)
Actuarial gain	184,000	1,412,000
Prior service cost amortization	0	57,000
Settlement charge	2,662,000	3,558,000
Net periodic (income) expense	3,050,000	6,615,000
Anticipated contributions by employer	13,700,000
Benefit payments made in current fiscal year	10,900,000
Additional benefit payments within the next 12 months	100,000
Settlement charges	200,000
Settlement charges expensed		6,900,000
Settlement charges in discontinued operations		3,700,000
Postretirement Benefit Plans
Components of net periodic benefit cost:
Service cost	98,000	60,000
Interest cost	117,000	226,000
Expected long-term return on assets	(114,000)	(387,000)
Actuarial gain	0	(212,000)
Transition amortization	0	15,000
Net periodic (income) expense	101,000	(298,000)
Non-Qualified Supplemental Employee Retirement Plan
Components of net periodic benefit cost:
Settlement charges	$ 2,500,000	$ 400,000