Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Summary Of Significant Accounting Policies [Abstract]

Schedule Of Uncollectible Reinsurance Recoverable And Premium Receivables

	Years Ended December 31,
(Dollars in thousands)	2021		2020
Reinsurance recoverable premium receivables and deductibles	$	46,499	$	41,357

Net Income (Loss) Per Common Share

		Years Ended December 31,
(Dollars in thousands, except per share amounts)		2021			2020			2019
Net income (loss) per share:
Numerator
Net income (loss)		$	1,379,083		$	514,151		$	1,009,461
Less: dividends declared-common shares and nonvested common shares			(246,699)			(249,056)			(234,322)
Undistributed earnings			1,132,384			265,094			775,139
Percentage allocated to common shareholders (1)			98.7	%		98.7	%		98.9	%
			1,117,318			261,770			766,386
Add: dividends declared-common shareholders			243,569			246,054			231,796
Numerator for basic and diluted earnings per common share		$	1,360,887		$	507,824		$	998,182
Denominator
Denominator for basic earnings per weighted-average common shares			39,263			39,656			40,291
Effect of dilutive securities:
Options			41			77			129
Denominator for diluted earnings per adjusted weighted-average common shares			39,304			39,734			40,420
Per common share net income (loss)
Basic		$	34.66		$	12.81		$	24.77
Diluted		$	34.62		$	12.78		$	24.70
(1)	Basic weighted-average common shares outstanding		39,263			39,656			40,291
	Basic weighted-average common shares outstanding and nonvested common shares expected to vest		39,792			40,160			40,751
	Percentage allocated to common shareholders		98.7	%		98.7	%		98.9	%
(Some amounts may not reconcile due to rounding.)