Stock-Based and Other Non-Cash Long-Term Incentive Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		1 Months Ended		3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2013 2013 Amended LTIP Plans item	Mar. 31, 2014 2013 Amended LTIP Plans	Mar. 31, 2014 2013 Long-Term Incentive Plan Restricted stock	Mar. 31, 2014 2013 Long-Term Incentive Plan 2015 Annual Stockholders' Meeting	Mar. 31, 2014 2013 Long-Term Incentive Plan Vesting on the third anniversaries of the date of grant
Stock-based compensation
Number of plans amended			2
Number of shares authorized				927,000
Number of shares of restricted stock granted					117,007	10,632	106,375
Stock-based and other non-cash long-term incentive compensation expense	$ 0.8	$ 1.6