Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets - Other Intangible Assets (Details)

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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Sep. 30, 2017
Other Intangible Assets [Abstract]    
Carrying Amount $ 560,617 $ 522,408
Accumulated Amortization (104,873) (98,026)
Net 455,744 424,382
Trade Names Not Subject to Amortization    
Other Intangible Assets [Abstract]    
Carrying Amount 168,467 168,467
Net 168,467 168,467
Trade names    
Other Intangible Assets [Abstract]    
Carrying Amount 8,504 5,522
Accumulated Amortization (2,284) (2,030)
Net 6,220 3,492
Customer relationships    
Other Intangible Assets [Abstract]    
Carrying Amount 364,554 333,632
Accumulated Amortization (90,611) (84,560)
Net 273,943 249,072
Copyrights/patents/other    
Other Intangible Assets [Abstract]    
Carrying Amount 19,092 14,787
Accumulated Amortization (11,978) (11,436)
Net $ 7,114 $ 3,351