Financial Instruments and Financial Risk Management - Additional information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 CAD ($)
Investments, All Other Investments [Abstract]
Fair value, assets, level 1 to level 2 transfers, amount	$ 0	$ 0
Fair value, assets, level 2 to level 1 transfers, amount	0	0
Fair value, liabilities, level 1 to level 2 transfers, amount	0	0
Fair value, liabilities, level 2 to level 1 transfers, amount	0	0
Fair value, equity, level 1 to level 2 transfers, amount	0	0
Fair value, equity, level to level 1 transfers, amount	0	0
Fair value, transfers into (out of) level 3	0	0
Federally insured limits exceeded amount	10,866,000	5,000,000
Cash held with bank accounts	29,000
Maximum credit exposure	$ 12,722,000	$ 13,178,000
Due from banks			$ 29