Pension and Other Postretirement Plans (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2007
Defined Benefit Pension Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Vesting percentage in accrued benefits from plan freeze					100.00%
Service cost	$ 42,000	$ 48,000	$ 126,000	$ 142,000
Interest cost	239,000	218,000	718,000	654,000
Expected return on plan assets	(320,000)	(284,000)	(959,000)	(850,000)
Amortization of prior service cost	1,000	1,000	3,000	3,000
Amortization of net loss	106,000	203,000	317,000	609,000
Net periodic benefit cost	68,000	186,000	205,000	558,000
Minimum required contribution	0		0
Contributions payable, from prior plan years		0		0
Company contributions to plan			300,000
Chairman and President Non-Qualified Defined Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	74,000	44,000	222,000	133,000
Interest cost	250,000	201,000	752,000	601,000
Amortization of prior service cost	15,000	15,000	44,000	44,000
Amortization of net loss	323,000	293,000	970,000	880,000
Net periodic benefit cost	662,000	553,000	1,988,000	1,658,000
Company contributions to plan			1,300,000
Company expected contributions to plans in fiscal year			2,000,000
Defined Benefit Postretirement Healthcare Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	28,000	29,000	83,000	88,000
Amortization of prior service cost	26,000	26,000	78,000	77,000
Amortization of net loss	(1,000)	9,000	(3,000)	25,000
Net periodic benefit cost	$ 53,000	$ 64,000	$ 158,000	$ 190,000
Minimum [Member] | Chairman and President Non-Qualified Defined Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Aggregate average annual participant salary increase (as a percentage)			10.00%