Employee Benefit Plans Summary of Pension Plan and Postretirement Plan Net Periodic Benefit Cost (Details) (USD $)	0 Months Ended	3 Months Ended				6 Months Ended
	Feb. 01, 2014	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Pension Plan [Member]
Define Benefit Plan Disclosure [Line Items]
Service cost		$ 92,000	[1]	$ 51,000	[1]	$ 184,000	[1]	$ 102,000	[1]
Interest cost		853,000		772,000		1,706,000		1,544,000
Expected return on plan assets		(810,000)		(800,000)		(1,621,000)		(1,600,000)
Net amortization and deferral		244,000		596,000		488,000		1,192,000
Net periodic benefit cost		379,000		619,000		757,000		1,238,000
Postretirement Plan [Member]
Define Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	1,500,000
Defined Benefit Plan, Curtailments		3,300,000
Service cost		0		57,000		15,000		114,000
Interest cost		48,000		81,000		109,000		162,000
Net accretion and deferral		(84,000)		(91,000)		(179,000)		(182,000)
Net periodic benefit cost		$ (36,000)		$ 47,000		$ (55,000)		$ 94,000

[1] The Pension Plan service cost recorded for the three and six months ended June 30, 2014 and 2013, respectively, was related to administrative costs associated with the plan and was not due to the accrual of additional participant benefits.