Earnings per Share Level 4 (Details) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Weighted Average Number of Shares Outstanding, Basic	45,841	47,473	46,020	47,539
Incremental Common Shares Attributable to Stock Options	0	11	2	12
Incremental Common Shares Attributable to Contingently Issuable Shares	116	133	105	124
Weighted Average Number of Shares, Restricted Stock	171	174	186	193
Weighted Average Number of Shares Outstanding, Diluted	46,128	47,791	46,313	47,868

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details