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Common Stock Repurchases (Details) (USD $) Share data in Millions, unless otherwise specified	0 Months Ended	6 Months Ended
	Jan. 21, 2013	Jun. 30, 2013	Jun. 30, 2012
Share Repurchase Program [Abstract]
Stock repurchase program, authorized amount	$ 50,000,000
Stock repurchased during period (in shares)		0.6
Stock repurchased during period		$ 14,083,000	$ 0

The cash outflow to reacquire common stock during the period.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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