Summary of Significant Accounting Policies - Basic and Diluted Net Income Per Share Calculations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Basic net income per common share calculation:
Net income available to common shareholders	$ 133,473	$ 125,312
Denominator - Weighted average common shares outstanding (in shares)	75,921,282	75,654,986
Basic net income per common share (in dollars per share)	$ 1.76	$ 1.66
Diluted net income per common share calculation:
Numerator - Net income available to common shareholders	$ 133,473	$ 125,312
Dilutive shares contingently issuable (in shares)	121,000	275,000
Weighted Average Number of Shares Outstanding, Diluted	76,042,328	75,930,372
Diluted net income per common share (in dollars per share)	$ 1.76	$ 1.65