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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	Jul. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Jul. 31, 2017	Sep. 30, 2016
Unrealized gains (losses) on available-for-sale securities, tax		$ 0
Change in loss on derivative contract, tax		0
Changes in supplemental executive retirement plan liability, tax		0
Changes in minimum pension liability, tax		0
Change in other benefit plan minimum liability, tax		$ 0
Predecessor
Unrealized gains (losses) on available-for-sale securities, tax	$ 0		$ 0	$ 0	$ 0
Change in loss on derivative contract, tax	0		0	0	0
Changes in supplemental executive retirement plan liability, tax	0		0	0	0
Changes in minimum pension liability, tax	0		0	0	0
Change in other benefit plan minimum liability, tax	$ 0		$ 0	$ 0	$ 0

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- Definition

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Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580

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-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580

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Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683

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-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580

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Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580

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-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580

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