Benefit Plans Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details)
|
12 Months Ended |
|
Dec. 31, 2016
USD ($)
$ / shares
shares
|
Dec. 31, 2015
USD ($)
$ / shares
shares
|
Dec. 31, 2014
shares
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Exercised |
(101,303)
|
(125,000)
|
(369,275)
|
| First Financial Northwest, Inc. 2008 Equity Incentive Plan | Stock Options |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Outstanding at beginning balance |
884,260
|
|
|
| Granted |
0
|
|
|
| Exercised |
(260,440)
|
|
|
| Outstanding at ending balance |
603,820
|
884,260
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] |
|
|
|
| Outstanding beginning balance, Weighted Average Exercise Price | $ / shares |
$ 10.11
|
|
|
| Granted | $ / shares |
0.00
|
|
|
| Exercised | $ / shares |
9.78
|
|
|
| Outstanding ending balance, Weighted Average Exercise Price | $ / shares |
$ 10.19
|
$ 10.11
|
|
| Share-based Compensations Arrangement by Share-based Payment Award, Options Outstanding, Weighted Average Remaining Contractual Term [Roll Forward] |
|
|
|
| Outstanding ending balance, Weighted Average Remaining Contractual Term |
4 years 10 months 1 day
|
|
|
| Share Based Compensation, Stock Option Plan, Additional Disclosures [Abstract] |
|
|
|
| Outstanding beginning balance, Agregate Intrinsic Value | $ |
|
|
|
| Exercised | $ |
|
|
|
| Outstanding ending balance, Agregate Intrinsic Value | $ |
$ 5,766,947
|
|
|
| Expected to Vest, Shares |
598,750
|
|
|
| Expected to Vest, Weighted Average Exercise Price | $ / shares |
$ 10.18
|
|
|
| Expected to Vest, Weighted Average Remaining Contracutal Term in Years |
4 years 9 months 25 days
|
|
|
| Expected to Vest, Aggregate Intrinsic Value | $ |
$ 5,723,540
|
|
|
| Exercisable ending balance, Shares |
434,820
|
|
|
| Exercisable ending balance, Weighted Average Exercise Price |
9.80
|
|
|
| Exercisable ending balance, Weighted Average Remaining Contracutal Term in Years |
3 years 9 months 18 days
|
|
|
| Exercisable ending balance, Aggregate Intrinsic Value | $ |
$ 4,320,027
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period |
20,000
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price | $ / shares |
$ 12.05
|
|
|
| First Financial Northwest, Inc. 2008 Equity Incentive Plan | Restricted Stock |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
|
|
|
| Nonvested beginning balance, Shares |
47,800
|
|
|
| Granted, Shares |
14,052
|
|
|
| Vested, Shares |
(35,452)
|
|
|
| Nonvested ending balance, Shares |
26,400
|
47,800
|
|
| Expected to vest assuming a 3% forfeiture rate over the vesting term, Shares |
25,608
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] |
|
|
|
| Nonvested beginning balance, Weighted-Average Grant Date Fair Value | $ / shares |
$ 8.95
|
|
|
| Granted, Weighted-Average Grant Date Fair Value | $ / shares |
12.81
|
|
|
| Vested, Weighted-Average Grant Date Fair Value | $ / shares |
10.34
|
|
|
| Nonvested ending balance, Weighted-Average Grant Date Fair Value | $ / shares |
$ 9.13
|
$ 8.95
|
|