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	Sep. 30, 2017	Dec. 31, 2016
Available For Sale Debt Securities Amortized Cost Basis	$ 429,857	$ 460,435
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	2,233	1,241
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	6,090	12,189
Available-for-sale Securities, Debt Securities	426,000	449,487
Available For Sale Equity Securities Amortized Cost Basis	5,199	5,200
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax	279	208
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	18	75
Available-for-sale Securities, Equity Securities	5,460	5,333
Corporate Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	159,753	192,976
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	894	209
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	2,471	5,490
Available-for-sale Securities, Debt Securities	158,176	187,695
Residential Mortgage Backed Securities
Available For Sale Debt Securities Amortized Cost Basis	7,011	6,021
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	8
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	106	116
Available-for-sale Securities, Debt Securities	6,905	5,913
US Treasury Securities
Available For Sale Debt Securities Amortized Cost Basis	44,077	43,417
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	57	133
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	257	441
Available-for-sale Securities, Debt Securities	43,877	43,109
US Government Agencies Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	16	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	16	23
US Government-sponsored Enterprises Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	9,992	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	211	422
Available-for-sale Securities, Debt Securities	9,782	9,880
US States and Political Subdivisions Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	194,724	191,146
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1,143	780
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	2,828	5,115
Available-for-sale Securities, Debt Securities	193,039	186,811
Foreign Government Debt
Available For Sale Debt Securities Amortized Cost Basis	4,276	5,098
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	22	13
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	85	157
Available-for-sale Securities, Debt Securities	4,213	4,954
Redeemable Preferred Stock
Available For Sale Debt Securities Amortized Cost Basis	10,008	11,454
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	116	96
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	132	448
Available-for-sale Securities, Debt Securities	9,992	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	191	178
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	18	0
Available-for-sale Securities, Equity Securities	1,785	1,790
Nonredeemable Preferred Stock
Available For Sale Equity Securities Amortized Cost Basis	3,587	3,588
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax	88	30
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	0	75
Available-for-sale Securities, Equity Securities	$ 3,675	$ 3,543

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

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