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Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net income	$ 3,949,000	$ 100,980,000
Other comprehensive income, net of tax:
Unrealized gain on short-term investments (net of tax of $7,000 and $0)	10,000	0
Foreign currency translation gain	45,000	12,000
Total other comprehensive income, net of tax	55,000	12,000
Comprehensive income	$ 4,004,000	$ 100,992,000

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity.

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