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Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 15, 2022 | Jul. 29, 2019 | Jul. 15, 2019 | Apr. 29, 2019 | Apr. 15, 2019 | Jan. 28, 2019 | Jan. 31, 2019 | Nov. 30, 2018 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2019 | Jun. 30, 2018 | Jul. 31, 2015
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average purchase price (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 43.46 | $ 44.41 |
Number of shares repurchased (shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,036,000 | 1,126,379 |
Shares repurchased |  |  |  |  |  |  |  |  | $ 45,000 |  |  |  |  | $ 50,000 | $ 45,000 | $ 50,000 |
Dividend declared (in dollars per share) |  |  |  | $ 0.30 |  | $ 0.30 |  | $ 0.30 | $ 0.30 | $ 0.30 | $ 0.30 | $ 0.29 | $ 0.29 | $ 0.29 |  |  |
Common stock dividends declared |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 61,400 | 54,400 |
Dividends paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 61,700 | 52,300 |
Common stock isued (in shares) |  |  |  |  |  |  | 4,687,498 |  |  |  |  |  |  |  |  |  |
Net proceeds from issuance of common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 205,300 | 0 |
Preferred stock issued (in shares) |  |  |  |  |  |  | 2,156,250 |  |  |  |  |  |  |  |  |  |
Net proceeds from issuance of mandatory convertible preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 199,500 | 0 |
Preferred stock, par value (in dollars per share) |  |  |  |  |  |  | $ 0.01 |  |  |  |  |  |  |  |  |  |
Liquidation preference (in dollars per share) |  |  |  |  |  |  | $ 100.00 |  |  |  |  |  |  |  |  |  |
Mandatory convertible preferred stock annual rate |  |  |  |  |  |  | 7.50% |  |  |  |  |  |  |  |  |  |
Preferred stock dividend declared (in dollars per share) |  |  |  | $ 1.875 |  | $ 1.8333 |  |  | $ 1.875 | $ 1.83 |  |  |  |  | $ 7,700,000 |  |
Preferred stock dividends |  |  |  |  | $ 3,900 |  |  |  | $ 4,400 | $ 3,300 |  |  |  |  | $ 4,000 | $ 0 |
Payments for capped call transactions |  |  |  |  |  | $ 9,000 |  |  |  |  |  |  |  |  |  |  |
Minimum | Scenario, Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of preferred stock to common stock (in shares) | 1,789,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Scenario, Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of preferred stock to common stock (in shares) | 2,173,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Over-Allotment Option |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock isued (in shares) |  |  |  |  |  |  | 611,412 |  |  |  |  |  |  |  |  |  |
Preferred stock issued (in shares) |  |  |  |  |  |  | 281,250 |  |  |  |  |  |  |  |  |  |
Spectrum Auto Care Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Newly-issued common stock in acquisition (in shares) |  |  |  |  |  | 5,278,921 |  |  |  |  |  |  |  |  |  |  |
Fair value of equity consideration |  |  |  |  |  | $ 240,500 |  |  |  |  |  |  |  |  |  |  |
Opening stock price (in dollars per share) |  |  |  |  |  | $ 45.55 |  |  |  |  |  |  |  |  |  |  |
Percentage not transferable, limit |  |  |  |  |  | 4.90% |  |  |  |  |  |  |  |  |  |  |
Value of common stock in company acquired |  |  |  |  |  | $ 65,120 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend declared (in dollars per share) |  | $ 0.30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividend declared (in dollars per share) |  | $ 1.875 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends |  |  | $ 4,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized to be acquired (shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,500,000
Number of shares repurchased (shares) |  |  |  |  |  |  |  |  | 1,036,000 |  |  |  |  | 1,126,000 |  |  |

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