Business Combinations - Goodwill (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Measurement period adjustment to goodwill | $ 1,000 | |
| Goodwill | 1,364,016 | $ 1,077,186 |
| 2018 Acquisitions | ||
| Goodwill | 286,852 | |
| Goodwill expected to be deducted for income tax purposes | $ 33,200 |
| X | ||||||||||
- Definition The meausrement period adjustment realized during the reporting period to goodwill in connection with a business combination. No definition available.
|
| X | ||||||||||
- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|