Employee Benefit and Deferred Compensation Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Benefits
Plan expense for noncontributory benefit pension plan and post-retirement health and life plans
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	328	222	964	597
Expected return on plan assets	(539)	(359)	(1,617)	(979)
Prior service cost recognized	0	0	0	0
Recognized actuarial loss	59	114	150	313
Net periodic benefit cost (return)	(152)	(23)	(503)	(69)
Other Benefits
Plan expense for noncontributory benefit pension plan and post-retirement health and life plans
Service cost	1	8	13	21
Interest cost	19	21	65	48
Expected return on plan assets	0	0	0	0
Prior service cost recognized	0	0	0	0
Recognized actuarial loss	18	70	72	125
Net periodic benefit cost (return)	$ 38	$ 99	$ 150	$ 194