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Basis of Presentation (Details) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Reconciliation of basic weighted-average shares outstanding to diluted weighted-average shares outstanding
Weighted-average shares outstanding	57,151	57,115	57,149	57,113
Shares underlying stock options and restricted stock	39	1	20
Weighted-average shares outstanding-diluted	57,190	57,116	57,169	57,113

X

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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