Retirement Plans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Projected benefit obligation:
Balance, beginning of the year	$ 2,127	$ 1,807	$ 1,461
Service cost	83	60	46
Interest cost	84	90	84
Actuarial loss	(157)	298	143
Benefits paid to participants	(23)	(128)
Plan amendment			73
Balance, end of year	2,114	2,127	1,807
Funded status of the plan
Excess of benefit obligation over the value of plan assets	(2,114)	(2,127)	(1,807)
Unrecognized net actuarial gain	473	666	389
Unrecognized prior service cost	103	122	143
Accrued benefit cost	(1,538)	(1,339)	(1,275)
Net amounts recognized in the consolidated balance sheets
Accrued benefit cost	(2,114)	(2,127)
Accumulated other comprehensive loss	576	788
Accrued benefit cost	(1,538)	(1,339)	(1,275)
Benefits expected to be paid in each of the next five years and thereafter
2014	40
2015	51
2016	85
2017	124
2018	210
2019 through 2023	802
Total	1,312
Weighted-average rates used
Discount rate on the benefit obligation (as a percent)	4.95%	4.05%	5.03%
Rate of employee compensation increase (as a percent)	4.00%	4.00%	4.00%
Pension expense
Service cost	83	60	46
Interest cost	84	90	84
Amortization of prior service cost	19	21	56
Net loss amortization	36	21	11
Net periodic benefit cost	$ 222	$ 192	$ 197