Other Long-Term Assets and Other Income (Schedule of Other Income) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Other income:
MSHA reimbursements*		$ 2,053	[1]
Coal storage fees	83	964
Miscellaneous	634	598
Other income	$ 717	$ 3,615

[1] See “MSHA Reimbursements” on page 20.