Schedule III - Real Estate and Accumulated Depreciation and Amortization Part 17 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Investments In Real Estate [Line Items]
Total Investment in Real Estate	$ 1,721,404	$ 1,514,750	$ 1,410,051	$ 1,246,588
Accumulated Depreciation And Amortization Description [Member]
Schedule Of Investments In Real Estate [Line Items]
Initial Cost of Leasehold or Acquisition Investment to Company	1,662,484
Cost Capitalized Subsequent to Initial Investment	58,920
Land	870,119
Building and Improvements	851,285
Total Investment in Real Estate	1,721,404
Accumulated Depreciation and Amortization	$ 268,919
Date of Initial Leasehold or Acquisition Investment	2015
Accumulated Depreciation And Amortization Description [Member] | Various One
Schedule Of Investments In Real Estate [Line Items]
Initial Cost of Leasehold or Acquisition Investment to Company	$ 72,413
Cost Capitalized Subsequent to Initial Investment	15,757
Land	40,430
Building and Improvements	47,740
Total Investment in Real Estate	88,170
Accumulated Depreciation and Amortization	37,976
Accumulated Depreciation And Amortization Description [Member] | WASHINGTON | Snohomish One
Schedule Of Investments In Real Estate [Line Items]
Initial Cost of Leasehold or Acquisition Investment to Company	955
Cost Capitalized Subsequent to Initial Investment	0
Land	955
Building and Improvements	0
Total Investment in Real Estate	955
Accumulated Depreciation and Amortization	$ 0
Date of Initial Leasehold or Acquisition Investment	2015
Accumulated Depreciation And Amortization Description [Member] | WASHINGTON | South Bend One
Schedule Of Investments In Real Estate [Line Items]
Initial Cost of Leasehold or Acquisition Investment to Company	$ 760
Land	121
Building and Improvements	639
Total Investment in Real Estate	760
Accumulated Depreciation and Amortization	$ 304
Date of Initial Leasehold or Acquisition Investment	2015
Accumulated Depreciation And Amortization Description [Member] | WASHINGTON | Tacoma One
Schedule Of Investments In Real Estate [Line Items]
Initial Cost of Leasehold or Acquisition Investment to Company	$ 671
Land	671
Total Investment in Real Estate	$ 671
Date of Initial Leasehold or Acquisition Investment	2015
Accumulated Depreciation And Amortization Description [Member] | WASHINGTON | Tenino One
Schedule Of Investments In Real Estate [Line Items]
Initial Cost of Leasehold or Acquisition Investment to Company	$ 936
Land	219
Building and Improvements	717
Total Investment in Real Estate	936
Accumulated Depreciation and Amortization	$ 345
Date of Initial Leasehold or Acquisition Investment	2015
Accumulated Depreciation And Amortization Description [Member] | WASHINGTON | Vancouver One
Schedule Of Investments In Real Estate [Line Items]
Initial Cost of Leasehold or Acquisition Investment to Company	$ 1,215
Land	164
Building and Improvements	1,051
Total Investment in Real Estate	1,215
Accumulated Depreciation and Amortization	$ 457
Date of Initial Leasehold or Acquisition Investment	2015
Accumulated Depreciation And Amortization Description [Member] | WASHINGTON | Wilbur One
Schedule Of Investments In Real Estate [Line Items]
Initial Cost of Leasehold or Acquisition Investment to Company	$ 629
Land	153
Building and Improvements	476
Total Investment in Real Estate	629
Accumulated Depreciation and Amortization	$ 255