Defined Benefit Retirement Plan (Components of Net Periodic Pension Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Employee Benefit Plans [Abstract]
Service cost during the year		$ 56		$ 111
Interest cost on projected benefit obligation	99	113	198	226
Expected return on plan assets	(140)	(148)	(280)	(296)
Recognized net actuarial loss	51	74	102	148
Net periodic benefit cost	10	95	20	189
Amortization of net loss	(51)	(74)	(102)	(148)
Total recognized in other comprehensive loss (income)	(51)	(74)	(102)	(148)
Total recognized in net periodic benefit cost and other comprehensive loss (income)	$ (41)	$ 21	$ (82)	$ 41