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Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012
Subsequent Events [Abstract]
Initial refundable deposit	$ 5.0
Remaining balance to be paid into escrow	175.0
Aggregate purchase price of office building	$ 180.0

- Definition

The cash outflow for acquisition of or capital improvements of property, plant and equipment, used to produce goods or deliver services, and not otherwise defined in the taxonomy.

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