Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended		3 Months Ended
	Jan. 15, 2022	Jan. 28, 2019	Jan. 31, 2019	Nov. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Jul. 31, 2015
Class of Stock [Line Items]
Number of shares repurchased (shares)					1,126,379
Shares repurchased						$ 50,000
Average purchase price (in dollars per share)						$ 44.41
Dividend declared (in dollars per share)				$ 0.30	$ 0.30	$ 0.29
Dividends to shareholders					$ 18,400	$ 18,700
Dividends paid					19,800	$ 17,600
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
Subsequent Event
Class of Stock [Line Items]
Dividend declared (in dollars per share)		$ 0.30
Common stock isued (in shares)			4,687,498
Net proceeds from sale of common stock			$ 205,900
Preferred stock issued (in shares)			2,156,250
Preferred stock, par value (in dollars per share)			$ 0.01
Liquidation preference (in dollars per share)			$ 100.00
Net proceeds from sale of mandatory convertible preferred stock			$ 209,100
Mandatory convertible preferred stock annual rate			7.50%
Preferred stock dividend declared (in dollars per share)		$ 1.8333
Payments for capped call transactions		$ 9,000
Subsequent Event | Over-Allotment Option
Class of Stock [Line Items]
Common stock isued (in shares)			611,412
Preferred stock issued (in shares)			281,250
Subsequent Event | 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		$ 65,117
Common Stock
Class of Stock [Line Items]
Number of shares authorized to be acquired (shares)							7,500,000
Number of shares repurchased (shares)						1,126,000
Retained Earnings
Class of Stock [Line Items]
Dividends to shareholders					$ 18,400	$ 18,700