Other Income, Net (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
Other Income and Expenses [Abstract]
Interest income	$ 147	$ 139	$ 260	$ 182
Other nonoperating income	2	3	5	31
Insurance policy expense	(44)	0	(208)	(193)
Other income, net	$ 105	$ 142	$ 57	$ 20