Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]: Schedule of Available-for-sale Securities Reconciliation (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Available For Sale Debt Securities Amortized Cost Basis	$ 438,645	$ 460,435
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	2,389	1,241
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	6,489	12,189
Available-for-sale Securities, Debt Securities	434,545	449,487
Available For Sale Equity Securities Amortized Cost Basis	5,200	5,200
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax	255	208
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	0	75
Available-for-sale Securities, Equity Securities	5,455	5,333
Corporate Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	172,716	192,976
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1,002	209
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	2,815	5,490
Available-for-sale Securities, Debt Securities	170,903	187,695
Residential Mortgage Backed Securities
Available For Sale Debt Securities Amortized Cost Basis	7,188	6,021
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1	8
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	107	116
Available-for-sale Securities, Debt Securities	7,082	5,913
US Treasury Securities
Available For Sale Debt Securities Amortized Cost Basis	44,057	43,417
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	80	133
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	269	441
Available-for-sale Securities, Debt Securities	43,868	43,109
US Government Agencies Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	17	22
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	1
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Available-for-sale Securities, Debt Securities	17	23
US Government-sponsored Enterprises Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	10,095	10,301
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1	1
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	202	422
Available-for-sale Securities, Debt Securities	9,894	9,880
US States and Political Subdivisions Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	190,242	191,146
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1,157	780
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	2,892	5,115
Available-for-sale Securities, Debt Securities	188,507	186,811
Foreign Government Debt
Available For Sale Debt Securities Amortized Cost Basis	4,324	5,098
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	30	13
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	90	157
Available-for-sale Securities, Debt Securities	4,264	4,954
Redeemable Preferred Stock
Available For Sale Debt Securities Amortized Cost Basis	10,006	11,454
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	118	96
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	114	448
Available-for-sale Securities, Debt Securities	10,010	11,102
Common Stock
Available For Sale Equity Securities Amortized Cost Basis	1,612	1,612
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax	169	178
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Available-for-sale Securities, Equity Securities	1,781	1,790
Nonredeemable Preferred Stock
Available For Sale Equity Securities Amortized Cost Basis	3,588	3,588
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax	86	30
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	0	75
Available-for-sale Securities, Equity Securities	$ 3,674	$ 3,543

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

+ References

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.

+ References

+ Details

Name:	us-gaap_AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.

+ References

+ Details

Name:	us-gaap_AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-Subparagraph (b)-(g)
-URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of equity securities categorized neither as held-to-maturity nor as trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesEquitySecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_ForeignGovernmentDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_RedeemablePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_NonredeemablePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: