Retirement Pension Plan - Schedule of Pension Plan Disclosures (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]
Net periodic pension costs charged to expense	$ 198	$ 16	$ 11
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at the beginning of the year	(5,944)	(5,641)	(5,610)
Interest cost on projected benefit obligation	(232)	(254)	(322)
Actuarial gain (loss)	279	(359)	(312)
Benefits paid	846	310	603
Projected benefit obligation at the end of the year	(5,051)	(5,944)	(5,641)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	5,678	5,251	5,756
Actual gain on plan assets	904	237	98
Employer contributions	0	500	0
Benefits paid	(846)	(310)	(603)
Fair value of plan assets at end of year	5,736	5,678	5,251
Funded status (included in accrued liabilities or prepaid assets)	685	(265)	(390)
Unrecognized actuarial loss in accumulated other comprehensive income	$ 1,964	$ 3,114	$ 2,754