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
Significant Accounting Policies [Abstract]
Net Income Loss	$ 79,277	$ 70,806	$ 72,967
Weighted Average Number of Shares Outstanding, Basic	79,573	81,388	81,980
Basic EPS	$ 1.00	$ 0.87	$ 0.89
Dilutive Securities, Effect on Basic Earnings Per Share, Including Options and Restrictive Stock Units	$ 0	$ 0	$ 0
Incremental Common Shares Attributable to Share-based Payment Arrangements	39	56	44
Net Income (Loss) Available to Common Stockholders, Diluted	$ 79,277	$ 70,806	$ 72,967
Diluted	79,612	81,444	82,024
Diluted EPS	$ 1.00	$ 0.87	$ 0.89