FIRST FINANCIAL NORTHWEST, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 13,240	$ 12,249
Unrealized holding losses on available-for-sale securities	(18,319)	(1,636)
Tax effect	3,847	343
Reclassification adjustment for net gains realized in income	27	32
Tax effect	6	7
Gains on cash flow hedges	8,994	4,316
Tax effect	(1,889)	(906)
Other comprehensive (loss) income, net of tax	(7,388)	2,092
Total comprehensive income	$ 5,852	$ 14,341