Other Income, Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Income and Expenses [Abstract]
Interest income	$ 663	$ 379	$ 506
Other nonoperating income	9	36	11
Insurance policy expense	(532)	(369)	(111)
Other income, net	$ 140	$ 46	$ 406