Stock Incentive Plans (Details) (USD $)	0 Months Ended		12 Months Ended
	May 19, 2010	Dec. 31, 2012	Dec. 31, 2010 Stock option plans	Dec. 31, 2010 Stock option plans Director	Dec. 31, 2012 Options and SARs Maximum	Dec. 31, 2012 Stock awards Maximum	Dec. 31, 2012 Cash incentive awards and cash-settled stock awards Maximum
Stock Incentive Plans
Maximum number of shares that may be delivered to participants		4,000,000
Period from effective date after which no awards may be granted	10 years
Stock Incentive Plans
Shares available for grant during any calendar year					400,000	200,000
Amount of award payable with respect to any calendar year							$ 1,000,000
Vesting period				1 year
Weighted average assumptions used for estimating the fair value of the stock options granted
Number of options granted (in shares)			67,500	67,500
Risk-free interest rate (as a percent)				1.98%
Expected life, in years				4 years 10 months 24 days
Estimated Forfeiture Rate (as a percent)				0.00%
Expected volatility (as a percent)				47.17%
Expected dividend yield (as a percent)				3.01%
Estimated fair value per option (in dollars per share)			$ 1.48	$ 1.48