Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income - Changes in AOCI by Component (Details)

v3.7.0.1
Accumulated Other Comprehensive Income - Changes in AOCI by Component (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
AOCI Attributable to Parent [Abstract]        
Beginning balance     $ 708,665  
OCI, net of tax $ 6,252 $ 13,630 (17,902) $ 6,192
Ending balance 703,752   703,752  
AOCI Attributable to Noncontrolling Interest [Abstract]        
Beginning balance     669  
OCI, net of tax 6,252 13,630 (17,902) 6,192
Ending balance 571   571  
Post-retirement benefit plans        
AOCI Attributable to Parent [Abstract]        
Beginning balance (54,514) (42,372) (56,050) (43,474)
OCI before reclassification 0 0 0 0
Amounts reclassified from AOCI 1,462 1,058 2,998 2,160
OCI, net of tax 1,462 1,058 2,998 2,160
Ending balance (53,052) (41,314) (53,052) (41,314)
AOCI Attributable to Noncontrolling Interest [Abstract]        
OCI before reclassification 0 0 0 0
Amounts reclassified from AOCI 1,462 1,058 2,998 2,160
OCI, net of tax 1,462 1,058 2,998 2,160
Currency translation adjustment        
AOCI Attributable to Parent [Abstract]        
Beginning balance (153,601) (114,673) (122,259) (104,604)
OCI before reclassification 4,108 15,412 (27,234) 5,343
Amounts reclassified from AOCI 0 0 0 0
OCI, net of tax 4,108 15,412 (27,234) 5,343
Ending balance (149,493) (99,261) (149,493) (99,261)
AOCI Attributable to Noncontrolling Interest [Abstract]        
OCI before reclassification 4,108 15,412 (27,234) 5,343
Amounts reclassified from AOCI 0 0 0 0
OCI, net of tax 4,108 15,412 (27,234) 5,343
Derivatives        
AOCI Attributable to Parent [Abstract]        
Beginning balance 2,034 (666) (3,559) (2,248)
OCI before reclassification 979 (3,294) 7,065 (2,218)
Amounts reclassified from AOCI (306) 455 (799) 961
OCI, net of tax 673 (2,839) 6,266 (1,257)
Ending balance 2,707 (3,505) 2,707 (3,505)
AOCI Attributable to Noncontrolling Interest [Abstract]        
OCI before reclassification 979 (3,294) 7,065 (2,218)
Amounts reclassified from AOCI (306) 455 (799) 961
OCI, net of tax 673 (2,839) 6,266 (1,257)
Parent        
AOCI Attributable to Parent [Abstract]        
Beginning balance (206,081) (157,711) (181,868) (150,326)
OCI before reclassification 5,087 12,118 (20,169) 3,125
Amounts reclassified from AOCI 1,156 1,513 2,199 3,121
OCI, net of tax 6,243 13,631 (17,970) 6,246
Ending balance (199,838) (144,080) (199,838) (144,080)
AOCI Attributable to Noncontrolling Interest [Abstract]        
OCI before reclassification 5,087 12,118 (20,169) 3,125
Amounts reclassified from AOCI 1,156 1,513 2,199 3,121
OCI, net of tax 6,243 13,631 (17,970) 6,246
Post-retirement benefit plans        
AOCI Attributable to Parent [Abstract]        
OCI before reclassification 0 0 0 0
OCI, net of tax 0 0 0 0
AOCI Attributable to Noncontrolling Interest [Abstract]        
Beginning balance 0 0 0 0
OCI before reclassification 0 0 0 0
OCI, net of tax 0 0 0 0
Ending balance 0 0 0 0
Currency translation adjustment        
AOCI Attributable to Parent [Abstract]        
OCI before reclassification 9 (1) 68 (54)
OCI, net of tax 9 (1) 68 (54)
AOCI Attributable to Noncontrolling Interest [Abstract]        
Beginning balance 336 313 277 366
OCI before reclassification 9 (1) 68 (54)
OCI, net of tax 9 (1) 68 (54)
Ending balance 345 312 345 312
Derivatives        
AOCI Attributable to Parent [Abstract]        
OCI before reclassification 0 0 0 0
OCI, net of tax 0 0 0 0
AOCI Attributable to Noncontrolling Interest [Abstract]        
Beginning balance 0 0 0 0
OCI before reclassification 0 0 0 0
OCI, net of tax 0 0 0 0
Ending balance 0 0 0 0
Noncontrolling Interest        
AOCI Attributable to Parent [Abstract]        
OCI before reclassification 9 (1) 68 (54)
OCI, net of tax 9 (1) 68 (54)
AOCI Attributable to Noncontrolling Interest [Abstract]        
Beginning balance 336 313 277 366
OCI before reclassification 9 (1) 68 (54)
OCI, net of tax 9 (1) 68 (54)
Ending balance $ 345 $ 312 $ 345 $ 312