(9) Other Long-term Assets and Other Income (Details) - (9) Other Long-term Assets and Other Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		May 31, 2013
(9) Other Long-term Assets and Other Income [Abstract]
Advance coal royalties	$ 4,693		$ 3,324
Deferred financing costs, net	1,195		1,494
Marketable equity securities available for sale, at fair value (restricted)*	3,889	[1]	3,548	[1]
Ohio River Terminal (see Note 11)	2,836				2,800
Miscellaneous	4,792		2,941
	17,405		11,307
MSHA reimbursements**	3,672	[2]	4,236	[2]
Coal storage fees	1,238		304
Miscellaneous	768		459
	$ 5,678		$ 4,999

[1] *Held by Sunrise Indemnity, Inc., our wholly-owned captive insurance company.

[2] **See "MSHA Reimbursements" in the MD&A section for a discussion of these amounts.