FIRST FINANCIAL NORTHWEST, INC. AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Loans receivable allowance for loan losses	$ 13,057	$ 13,347
Stockholders' Equity
Preferred stock par value per share (in usd per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (in shares)	10,000,000	10,000,000
Preferred stock shares issued (in shares)	0	0
Preferred stock shares outstanding (in shares)	0	0
Common stock par value per share (in usd per share)	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	90,000,000	90,000,000
Common stock shares issued (in shares)	10,375,325	10,710,656
Common stock shares outstanding (in shares)	10,375,325	10,710,656