Pension and Other Postretirement Plans (Amounts Recognized in Financial Statements and Other Comprehensive Income) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Pension Plans [Member]
Amount recognized in the Company's consolidated financial statements
Assets	$ 0	$ 0
Liabilities	(3,682,000)	(2,279,000)
Net amount recognized	(3,682,000)	(2,279,000)
Amount recognized in accumulated other comprehensive income
Net loss	8,017,000	6,551,000
Prior service cost	3,000	7,000
Net amount recognized	8,020,000	6,558,000
Chairman and President Non-Qualified Defined Benefit Plans [Member]
Amount recognized in the Company's consolidated financial statements
Assets	0	0
Liabilities	(24,145,000)	(19,870,000)
Net amount recognized	(24,145,000)	(19,870,000)
Amount recognized in accumulated other comprehensive income
Net loss	11,959,000	8,293,000
Prior service cost	759,000	818,000
Net amount recognized	12,718,000	9,111,000
Defined Benefit Postretirement Healthcare Plans [Member]
Amount recognized in the Company's consolidated financial statements
Assets	0	0
Liabilities	(2,890,000)	(2,725,000)
Net amount recognized	(2,890,000)	(2,725,000)
Amount recognized in accumulated other comprehensive income
Net loss	128,000	18,000
Prior service cost	464,000	567,000
Net amount recognized	$ 592,000	$ 585,000