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Accumulated Other Comprehensive Income - Changes in AOCI by Component (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
AOCI Attributable to Parent [Abstract] |  |
Beginning balance | $ 708,665 |
OCI, net of tax | (24,154) | $ (7,438)
Ending balance | 687,763 |
AOCI Attributable to Noncontrolling Interest [Abstract] |  |
Beginning balance | 669 |
OCI, net of tax | (24,154) | (7,438)
Ending balance | 614 |
Post-retirement benefit plans |  |
AOCI Attributable to Parent [Abstract] |  |
Beginning balance | (56,050) | (43,474)
OCI before reclassification | 0 | 0
Amounts reclassified from AOCI | 1,536 | 1,102
OCI, net of tax | 1,536 | 1,102
Ending balance | (54,514) | (42,372)
AOCI Attributable to Noncontrolling Interest [Abstract] |  |
OCI before reclassification | 0 | 0
Amounts reclassified from AOCI | 1,536 | 1,102
OCI, net of tax | 1,536 | 1,102
Currency translation adjustment |  |
AOCI Attributable to Parent [Abstract] |  |
Beginning balance | (122,259) | (104,604)
OCI before reclassification | (31,342) | (10,069)
Amounts reclassified from AOCI | 0 | 0
OCI, net of tax | (31,342) | (10,069)
Ending balance | (153,601) | (114,673)
AOCI Attributable to Noncontrolling Interest [Abstract] |  |
OCI before reclassification | (31,342) | (10,069)
Amounts reclassified from AOCI | 0 | 0
OCI, net of tax | (31,342) | (10,069)
Derivatives |  |
AOCI Attributable to Parent [Abstract] |  |
Beginning balance | (3,559) | (2,248)
OCI before reclassification | 5,100 | 1,076
Amounts reclassified from AOCI | 493 | 506
OCI, net of tax | 5,593 | 1,582
Ending balance | 2,034 | (666)
AOCI Attributable to Noncontrolling Interest [Abstract] |  |
OCI before reclassification | 5,100 | 1,076
Amounts reclassified from AOCI | 493 | 506
OCI, net of tax | 5,593 | 1,582
Parent |  |
AOCI Attributable to Parent [Abstract] |  |
Beginning balance | (181,868) | (150,326)
OCI before reclassification | (26,242) | (8,993)
Amounts reclassified from AOCI | 2,029 | 1,608
OCI, net of tax | (24,213) | (7,385)
Ending balance | (206,081) | (157,711)
AOCI Attributable to Noncontrolling Interest [Abstract] |  |
OCI before reclassification | (26,242) | (8,993)
Amounts reclassified from AOCI | 2,029 | 1,608
OCI, net of tax | (24,213) | (7,385)
Post-retirement benefit plans |  |
AOCI Attributable to Parent [Abstract] |  |
OCI before reclassification | 0 | 0
OCI, net of tax | 0 | 0
AOCI Attributable to Noncontrolling Interest [Abstract] |  |
Beginning balance | 0 | 0
OCI before reclassification | 0 | 0
OCI, net of tax | 0 | 0
Ending balance | 0 | 0
Currency translation adjustment |  |
AOCI Attributable to Parent [Abstract] |  |
OCI before reclassification | 59 | (53)
OCI, net of tax | 59 | (53)
AOCI Attributable to Noncontrolling Interest [Abstract] |  |
Beginning balance | 277 | 366
OCI before reclassification | 59 | (53)
OCI, net of tax | 59 | (53)
Ending balance | 336 | 313
Derivatives |  |
AOCI Attributable to Parent [Abstract] |  |
OCI before reclassification | 0 | 0
OCI, net of tax | 0 | 0
AOCI Attributable to Noncontrolling Interest [Abstract] |  |
Beginning balance | 0 | 0
OCI before reclassification | 0 | 0
OCI, net of tax | 0 | 0
Ending balance | 0 | 0
Noncontrolling Interest |  |
AOCI Attributable to Parent [Abstract] |  |
OCI before reclassification | 59 | (53)
OCI, net of tax | 59 | (53)
AOCI Attributable to Noncontrolling Interest [Abstract] |  |
Beginning balance | 277 | 366
OCI before reclassification | 59 | (53)
OCI, net of tax | 59 | (53)
Ending balance | $ 336 | $ 313

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- Definition AOCI Attributable to Noncontrolling Interest [Abstract] + References No definition available. + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 27 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 7 + Details
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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=51821188&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E + Details
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