Derivative Financial Instruments - Interest Rate Swaps Outstanding (Details) $ in Thousands, $ in Millions	Sep. 30, 2024 USD ($)	Sep. 30, 2024 CAD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 CAD ($)
Derivative [Line Items]
Interest rate swap assets	$ 8,039
Interest rate swap liabilities	4,466
Interest Rate Swap | Designated derivatives
Derivative [Line Items]
Interest rate swap assets	3,024		$ 9,581
Interest rate swap liabilities	4,465		330
Interest Rate Swap Agreement 1 Maturing July 30 2027 | Interest Rate Swap | Designated derivatives
Derivative [Line Items]
Notional	$ 200,000		$ 200,000
Fixed Base Interest Rate Swap	3.05%	3.05%	3.05%	3.05%
Interest rate swap assets	$ 1,275		$ 3,687
Interest rate swap liabilities	0		0
Interest Rate Swap Agreement 2 Maturing July 30 2027 | Interest Rate Swap | Designated derivatives
Derivative [Line Items]
Notional	$ 175,000		$ 175,000
Fixed Base Interest Rate Swap	3.47%	3.47%	3.47%	3.47%
Interest rate swap assets	$ 0		$ 788
Interest rate swap liabilities	871		0
Interest Rate Swap Agreement 1 Maturing December 31 2027 | Interest Rate Swap | Designated derivatives
Derivative [Line Items]
Notional	$ 270,000		$ 270,000
Fixed Base Interest Rate Swap	3.05%	3.05%	3.05%	3.05%
Interest rate swap assets	$ 1,749		$ 5,106
Interest rate swap liabilities	$ 0		$ 0
Interest Rate Swap Agreement 2 Maturing December 31 2027 | Interest Rate Swap | Designated derivatives
Derivative [Line Items]
Notional		$ 250		$ 250
Fixed Base Interest Rate Swap	3.59%	3.59%	3.59%	3.59%
Interest rate swap assets	$ 0		$ 0
Interest rate swap liabilities	$ 3,594		$ 330