Significant Accounting Policies Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Significant Accounting Policies [Abstract]
Net Income Loss	$ 14,775	$ 133,584	$ 79,277
Weighted Average Number of Shares Outstanding, Basic	79,010	78,941	79,573
Basic EPS	$ 0.19	$ 1.69	$ 1.00
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	69	33	39
Net Income (Loss) Available to Common Stockholders, Diluted	$ 14,775	$ 133,584	$ 79,277
Diluted	79,079	78,974	79,612
Diluted EPS	$ 0.19	$ 1.69	$ 1.00