Income Taxes (Reconciliation of Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Expected Statutory Federal Income Tax Rate	35.00%	35.00%	35.00%
State Taxes	1.40%	1.40%	2.30%
State Tax Rate Change		2.70%	1.70%
Statutory Depletion	0.30%	0.40%	1.00%
Other	0.70%	0.40%	1.20%
Effective Income Tax Rate	36.80%	33.70%	35.80%