Other Income, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other Income and Expenses [Abstract]
Interest income	$ 204	$ 199
Other nonoperating income	35	41
Insurance policy expense	(112)	(122)
Other nonoperating expense	(3)	(3)
Other income, net	$ 124	$ 115