Significant Accounting Policies - Earnings per share (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Significant Accounting Policies
Net income (loss) available for stockholders:	$ 218,363	$ 7,217	$ (212,192)
Less: Adjustments for losses attributable to participating securities	(3,197)	(89)
Net income (loss) used in calculating earnings per share	$ 215,166	$ 7,128	$ (212,192)
Weighted average shares outstanding (including participating securities)	216,518	215,646	215,063
Adjustment for participating securities	(3,187)	(2,656)	(2,571)
Shares used in calculating basic earnings per share	213,331	212,990	212,492