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Business Description And Significant Accounting Policies: Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net income available for common stock	$ 236,744	$ 227,608	$ 199,310
Weighted average shares - Basic (in shares)	63,219	62,378	60,662
Dilutive effect of:
Equity compensation (in shares)	106	61	136
Weighted average shares - diluted (in shares)	63,325	62,439	60,798
Total earnings (loss) per share of common stock, Diluted (usd per share)	$ 3.74	$ 3.65	$ 3.28

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