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Line of Business Results - Additional Information (Detail)	3 Months Ended
	Jun. 30, 2013 Industry
Nature Of Operations [Abstract]
Number of business units	6
Federal income tax rate	35.00%
State income tax rate	2.20%

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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