Federal Income Taxes: Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Deferred tax assets:      
Net operating loss carryforward $ 0 $ 0 $ 3,052
Charitable contributions 0 7 2
ALLL 3,803 3,257 3,599
Reserve for unfunded commitments 131 187 128
Deferred compensation 592 646 688
Net unrealized loss on investments available-for-sale 557 0 0
Alternative minimum tax credit carryforward 45 1,375 1,939
Employee benefit plans 951 1,051 1,535
Net capital loss on investments 0 0 450
OREO market value adjustments 231 213 414
Accrued expenses 453 510 165
Deferred tax assets before valuation allowance 6,763 7,246 11,972
Valuation allowance 0 0 (450)
Total deferred tax assets 6,763 7,246 11,522
Deferred tax liabilities:      
FHLB stock dividends 552 1,255 1,337
Loan origination fees and costs 1,477 870 744
Net unrealized gain on investments available for sale 0 44 432
Deferred Tax Liabilities, Derivatives 467 0 0
Deferred Tax Liabilities, Property, Plant and Equipment 869 299 472
Other, net 256 222 199
Total deferred tax liabilities 3,621 2,690 3,184
Deferred tax assets, net $ 3,142 $ 4,556 $ 8,338