Stock Repurchase Plan - Narrative (Details) - USD ($)	6 Months Ended	12 Months Ended		40 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Aug. 31, 2019	Jul. 31, 2019	May 31, 2016
Equity, Class of Treasury Stock [Line Items]
Total authorized repurchase amount			$ 80,000,000.0			$ 30,000,000.0
Common stock purchased under share repurchase program (in shares)		1,335,584	0	988,767
Average Cost Per Common Stock (in USD per share)		$ 35.83		$ 30.30
Total value of stock repurchased	$ 55,300,000	$ 55,300,000
Total remaining authorized repurchase amount	$ 24,700,000	24,700,000
July 2019 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Total authorized repurchase amount					$ 50,000,000.0
Common stock purchased under share repurchase program (in shares)	652,000
Average Cost Per Common Stock (in USD per share)	$ 38.88
Total value of stock repurchased	$ 25,300,000	$ 25,300,000