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Consolidated Statement of Cash Flows (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Operating activities:    
Cash provided by operating activities $ 16,437 $ 12,961
Investing activities:    
Capital expenditures for coal properties (9,126) (14,778)
Ohio River Terminal   (2,823)
Purchase of marketable securities   (1,414)
Other   161
Cash used in investing activities (9,126) (18,854)
Financing activities:    
Dividends (2,394) (1,159)
Other (120)  
Cash used in financing activities (2,514) (1,159)
Increase (decrease) in cash and cash equivalents 4,797 (7,052)
Cash and cash equivalents, beginning of period 16,228 21,888
Cash and cash equivalents, end of period $ 21,025 $ 14,836