Defined Benefit Pension Plan (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Officer	Jun. 30, 2012
Compensation and Retirement Disclosure [Abstract]
Number of founding Officers Eligible for Retirement Benefit Plan			3
Maximum annual benefits payable under the Executive Retirement Plan, frozen subject to cost-of-living adjustments	$ 896,000		$ 896,000
Net periodic benefit cost recorded related to the Company's pension plans
Service costs	22,000	19,000	43,000	38,000
Interest costs	149,000	181,000	298,000	363,000
Amortization of net gain/loss	344,000	248,000	690,000	496,000
Amortization of prior service cost	(297,000)	(181,000)	(594,000)	(362,000)
Total recognized in net periodic benefit cost	$ 218,000	$ 267,000	$ 437,000	$ 535,000