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Earnings Per Share (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Potentially dilutive securities	169	400
Weighted-average exercise price	62.66	55.37

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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