Database Software

11g  11.2.0.3.0

Newbie on XMLTABLE XML DB!

sample XML (person_data.person_data):

<CstmrPmtStsRpt>
  <GrpHdr>
    <MsgId>99</MsgId>
    <CreDtTm>2013-11-12T08:10:57</CreDtTm>
    <InitgPty>
      <Id>
        <OrgId>
          <Othr>
            <Id>BANK_ID</Id>
            <SchmeNm>
              <Cd>BANK</Cd>
            </SchmeNm>
          </Othr>
          <Othr>
            <Id>CUST_ID</Id>
            <SchmeNm>
              <Cd>CUST</Cd>
            </SchmeNm>
          </Othr>
        </OrgId>
      </Id>
    </InitgPty>
  </GrpHdr>
</CstmrPmtStsRpt>

Would like to extract the Id associated with the BANK (and only the bank Id):

Requested SQL output:
BANK_ID

So far I've come up with:

SELECT t.column_value
FROM person_data a,
  XMLTABLE (
    'for $root in /CstmrPmtStsRpt/GrpHdr/InitgPty/Id/OrgId/Othr
     where $root/SchmeNm/Cd = "BANK" 
      return $root/Id'
  passing a.person_data) t;

Which returns

<Id>BANK_ID</Id>

Adding text() as below:

SELECT t.column_value
FROM person_data a,
  XMLTABLE (
    'for $root in /CstmrPmtStsRpt/GrpHdr/InitgPty/Id/OrgId/Othr
     where $root/SchmeNm/Cd = "BANK" 
      return $root/Id/text()'
  passing a.person_data) t;

Returns <no rows returned>

I know I'm missing something fundamental here - just need a pointer. Thanks!