Pension Plans (Details 3) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Excess plan
Defined contribution plan disclosures
Expense recorded	$ 30,000	$ 30,000	$ 60,000	$ 60,000
Employer contributions	0	0	126,000	115,000
Liability for benefits	58,000		58,000		$ 124,000
Defined contribution 401 (k) plan)
Defined contribution plan disclosures
Expense recorded	$ 198,000	$ 197,000	$ 428,000	$ 392,000