Pension - Periodic Benefit Cost (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
Components of net periodic benefit cost:
Interest cost	$ 18	$ 5	$ 53	$ 48
Service cost	6	13	19	30
Expected return on plan assets	(23)	2	(70)	(53)
Amortization of prior service costs	2	3	7	8
Amortization of actuarial loss	29	29	87	106
Net periodic benefit cost	$ 32	$ 52	$ 96	$ 139