Pension Plans and Other Postretirement Benefits (Details 4) - Postretirement Benefit Costs [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Change in accumulated postretirement benefit obligations:
Accumulated postretirement benefit obligations at beginning of year	$ 1,130	$ 2,862
Changes during fiscal year
Service cost	0	0
Interest cost	46	92
Plan amendment	0	(1,393)
Settlements	(965)	0
Employer payments net of participant contributions	(95)	(491)
Actuarial (gain) loss	(116)	60
Accumulated postretirement benefit obligations at end of year	0	1,130
Unfunded status	0	(1,130)
Total amount recognized in Consolidated Balance Sheets, all in Other Liabilities	0	(1,130)
Amounts recognized in accumulated other comprehensive income (loss) (“AOCI”):
Prior service cost (credit)	0	(1,341)
Net actuarial loss (gain)	0	(604)
Total amount recognized in AOCI	$ 0	$ (1,945)