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Income Taxes (Details) $ in Millions	3 Months Ended
	Jun. 30, 2017 USD ($)
Income Tax Disclosure [Abstract]
Tax benefit in prior year-quarter due to release of a portion of valuation allowance previously offsetting deferred tax assets associated with existing AMT credit carryforwards	$ 20.0

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- References

No definition available.

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- Definition

Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319

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