Equity Incentive Plan - Restricted share activity (Details) - Restricted Stock [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Outstanding, at beginning of the period	175	175	194
Shares Outstanding, granted	81	87	52
Shares Outstanding, vested	(63)	(64)	(68)
Shares Outstanding, forfeited	(10)	(23)	(3)
Shares Outstanding, at end of the period	183	175	175
Weighted Average Grant Date Fair Value, at beginning of the period (in dollars per share)	$ 64.90	$ 60.53	$ 50.71
Weighted Average Grant Date Fair Value, granted (in dollars per share)	63.10	65.23	78.43
Weighted Average Grant Date Fair Value, vested (in dollars per share)	60.84	53.82	45.78
Weighted Average Grant Date Fair Value, forfeited (in dollars per share)	65.12	63.88	63.80
Weighted Average Grant Date Fair Value, at end of the period (in dollars per share)	$ 65.46	$ 64.90	$ 60.53