Fair Value: Schedule of quantitative information about Level 3 Fair Value Measurements on a nonrecurring basis (Details) - Level 3 - Market Approach Valuation Technique - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2019	Dec. 31, 2018
Loans Receivable
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Unobservable Input(s)	Appraised value discounted by market or borrower conditions	Appraised value discounted by market or borrower conditions
Loans Receivable \| Minimum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Fair value of financial instruments, range	0.00%	0.00%
Loans Receivable \| Maximum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Fair value of financial instruments, range	0.00%	0.00%
Loans Receivable \| Weighted Average
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Fair value of financial instruments, range	0.00%	0.00%
Other Real Estate Owned
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Unobservable Input(s)	Appraised value less selling costs	Appraised value less selling costs
Other Real Estate Owned \| Minimum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Fair value of financial instruments, range	0.00%	0.00%
Other Real Estate Owned \| Maximum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Fair value of financial instruments, range	0.00%	0.00%
Other Real Estate Owned \| Weighted Average
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Fair value of financial instruments, range	0.00%	0.00%
Fair Value, Nonrecurring [Member] \| Loans Receivable
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 18,427	$ 10,087
Fair Value, Nonrecurring [Member] \| Other Real Estate Owned
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 454	$ 483

The percent range of asset measurement values for fair value disclosure.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Description of the valuation processes in place for fair value measurements categorized within Level 3 of the fair value hierarchy.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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