Earnings Per Share (Reconciliation of Net Earnings to Net Earnings Per Share Basic and Diluted) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share
Net earnings	$ 23,383	$ 27,368
Basic shares outstanding	67,724	68,461
Dilutive effect of stock options and restricted stock	1,297	1,252
Diluted shares outstanding	69,021	69,713
Basic earnings per share	$ 0.35	$ 0.40
Diluted earnings per share	$ 0.34	$ 0.39

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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