Fair Value of Financial Instruments: Schedule of Additional Information About Valuation Techniques and Inputs Used for Assets and Liabilities (Details) - Fair Value, Inputs, Level 3 $ in Thousands	6 Months Ended
	Dec. 31, 2017 USD ($)
Commitments to extend credit on loans to be held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, fair value	$ 21
Valuation Techniques	Relative value analysis
Commitments to extend credit on loans to be held for sale | Minimum | Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	100.90%	[1]
Fall-out ratio (percent)	12.90%	[1],[2]
Commitments to extend credit on loans to be held for sale | Maximum | Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	103.40%	[1]
Fall-out ratio (percent)	32.00%	[1],[2]
Commitments to extend credit on loans to be held for sale | Weighted Average | Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	103.40%	[1]
Fall-out ratio (percent)	30.60%	[1],[2]
Mandatory loan sale commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, fair value	$ 24
Valuation Techniques	Relative value analysis
Mandatory loan sale commitments | Minimum | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investor quotes (percent)	0.00%	[1]
Roll-forward costs (percent)	0.00%	[1],[3]
Mandatory loan sale commitments | Minimum | Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investor quotes (percent)		[1]
Roll-forward costs (percent)	0.00%	[1],[3]
Mandatory loan sale commitments | Maximum | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investor quotes (percent)	0.00%	[1]
Roll-forward costs (percent)	0.00%	[1],[3]
Mandatory loan sale commitments | Maximum | Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investor quotes (percent)		[1]
Roll-forward costs (percent)	0.00%	[1],[3]
Mandatory loan sale commitments | Weighted Average | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investor quotes (percent)	0.00%	[1]
Roll-forward costs (percent)	0.00%	[1],[3]
Mandatory loan sale commitments | Weighted Average | Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investor quotes (percent)		[1]
Roll-forward costs (percent)	0.00%	[1],[3]
Private issue CMO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 419
Valuation Techniques	Market comparable pricing
Private issue CMO | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Comparability Adjustments	0.60%	[1]
Private issue CMO | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Comparability Adjustments	1.70%	[1]
Private issue CMO | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Comparability Adjustments	1.50%	[1]
Loans Held For Investment, at Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 5,157
Valuation Techniques	Relative value analysis
Loans Held For Investment, at Fair Value [Member] | Minimum | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	97.90%	[1]
Fair Value Inputs, Entity Credit Risk	1.20%	[1]
Loans Held For Investment, at Fair Value [Member] | Maximum | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	104.80%	[1]
Fair Value Inputs, Entity Credit Risk	100.00%	[1]
Loans Held For Investment, at Fair Value [Member] | Weighted Average | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	100.80%	[1]
Fair Value Inputs, Entity Credit Risk	4.60%	[1]
Non-performing loans | Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 61
Valuation Techniques	Discounted cash flow
Non-performing loans | Relative Value Analysis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 886
Valuation Techniques	Relative value analysis
Non-performing loans | Minimum | Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Probability of default (percent)	5.00%	[1]
Non-performing loans | Minimum | Relative Value Analysis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Probability of default (percent)	20.00%	[1]
Non-performing loans | Maximum | Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Probability of default (percent)	5.00%	[1]
Non-performing loans | Maximum | Relative Value Analysis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Probability of default (percent)	30.00%	[1]
Non-performing loans | Weighted Average | Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Probability of default (percent)	5.00%	[1]
Non-performing loans | Weighted Average | Relative Value Analysis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Probability of default (percent)	21.40%	[1]
MSA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 450
Valuation Techniques	Discounted cash flow
MSA | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Prepayment speed (percent)	10.20%	[1]
Discount rate (percent)	9.00%	[1]
MSA | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Prepayment speed (percent)	60.00%	[1]
Discount rate (percent)	10.50%	[1]
MSA | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Prepayment speed (percent)	21.30%	[1]
Discount rate (percent)	9.20%	[1]
Interest-Only Strips
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 26
Valuation Techniques	Discounted cash flow
Interest-Only Strips | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Prepayment speed (percent)	15.60%	[1]
Discount rate (percent)	9.00%	[1]
Interest-Only Strips | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Prepayment speed (percent)	29.70%	[1]
Discount rate (percent)	9.00%	[1]
Interest-Only Strips | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Prepayment speed (percent)	27.40%	[1]
Discount rate (percent)	9.00%	[1]
Commitments to extend credit on loans to be held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 737
Valuation Techniques	Relative value analysis
Commitments to extend credit on loans to be held for sale | Minimum | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	99.30%	[1]
Fall-out ratio (percent)	12.90%	[1],[2]
Commitments to extend credit on loans to be held for sale | Maximum | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	105.10%	[1]
Fall-out ratio (percent)	32.00%	[1],[2]
Commitments to extend credit on loans to be held for sale | Weighted Average | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	102.00%	[1]
Fall-out ratio (percent)	30.60%	[1],[2]
Mandatory loan sale commitments | Minimum | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	0.00%	[1]
Mandatory loan sale commitments | Minimum | Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	101.30%	[1]
Mandatory loan sale commitments | Maximum | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	0.00%	[1]
Mandatory loan sale commitments | Maximum | Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	103.90%	[1]
Mandatory loan sale commitments | Weighted Average | Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	0.00%	[1]
Mandatory loan sale commitments | Weighted Average | Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	103.30%	[1]
Put options | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	0.00%	[1]
Put options | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	0.00%	[1]
Put options | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Broker quotes (percent)	0.00%	[1]

[1] The range is based on the estimated fair values and management estimates.

[2] The percentage of commitments to extend credit on loans to be held for sale which management has estimated may not fund.

[3] An estimated cost to roll forward the mandatory loan sale commitments which management has estimated may not be delivered to the corresponding investors in a timely manner.