Background, Organization, and Summary of Significant Accounting Policies - Schedule of Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted average basic shares (in shares)	59,688	56,271	58,639	55,683	58,209	55,508
Effect of dilutive securities:
Management Incentive Plan shares (in shares)	0	0	0	0	0	3
Restricted stock units (in shares)	128	86	103	70	103	66
Weighted average diluted shares (in shares)	59,816	56,357	58,742	55,753	58,312	55,577
Number of performance share units granted (in shares)	115	76	95	63	93	57