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REVENUES FROM CONTRACT WITH CUSTOMERS - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Disaggregation of Revenues
Consolidated Revenues	$ 116,459	$ 232,945	$ 394,495	$ 723,237
United States
Disaggregation of Revenues
Consolidated Revenues	87,892	226,207	320,985	708,246
United Kingdom
Disaggregation of Revenues
Consolidated Revenues	19,708	3,487	53,866	6,156
Republic of Ireland
Disaggregation of Revenues
Consolidated Revenues	8,698	$ 3,251	18,857	$ 8,835
Other
Disaggregation of Revenues
Consolidated Revenues	$ 161		$ 787

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 32
-Paragraph 2A
-URI http://asc.fasb.org/extlink&oid=82859839&loc=SL82860478-203043

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130539-203045

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045

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