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Stock, Stock Options and Rights Stock Repurchase Program (Details) (USD $) Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Payments for Repurchase of Equity [Abstract]
Stock Repurchase Program, Authorized Amount	$ 50,000,000
Stock Repurchased and Retired During Period, Shares	10,209
Stock Repurchased and Retired During Period, Value	$ 50,000,000

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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