Summary of Significant Accounting Policies - Schedule of Reconciliation of Numerator and Denominator of the Basic and Diluted Earnings Per Share Computations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Basic EPS, Income (Numerator)
Earnings available to common shareholders	$ 81,815	$ 92,166	$ 154,827	$ 30,899
Effect of Dilutive Securities, Shares (Denominator)
Stock options and restricted stock units	489	323	501	375
Diluted EPS, Income (Numerator)
Earnings available to common shareholders	$ 81,815	$ 92,166	$ 154,827	$ 30,899
Basic EPS, Weighted Average Shares (Denominator)
Number of shares outstanding	45,226	44,951	45,202	44,936
Diluted EPS, Weighted Average Shares (Denominator)
Number of shares outstanding	45,715	45,274	45,703	45,311
Earnings Per Share, Diluted, Other Disclosures
Anti-dilutive options excluded from diluted EPS	169	94	169	335
Basic EPS, Per Share Amount
Basic net earnings per share (in dollars per share)	$ 1.81	$ 2.05	$ 3.43	$ 0.69
Diluted EPS, Per Share Amount
Diluted earnings per share (in dollars per share)	$ 1.79	$ 2.04	$ 3.39	$ 0.68