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	Mar. 31, 2017	Dec. 31, 2016
Available For Sale Debt Securities Amortized Cost Basis	$ 422,706	$ 460,435
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1,998	1,241
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	8,992	12,189
Available-for-sale Securities, Debt Securities	415,712	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	203	208
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	43	75
Available-for-sale Securities, Equity Securities	5,360	5,333
Corporate Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	162,187	192,976
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	974	209
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	3,970	5,490
Available-for-sale Securities, Debt Securities	159,191	187,695
Residential Mortgage Backed Securities
Available For Sale Debt Securities Amortized Cost Basis	7,377	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	142	116
Available-for-sale Securities, Debt Securities	7,235	5,913
US Treasury Securities
Available For Sale Debt Securities Amortized Cost Basis	37,632	43,417
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	117	133
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	382	441
Available-for-sale Securities, Debt Securities	37,367	43,109
US Government Agencies Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	20	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	20	23
US Government-sponsored Enterprises Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	10,229	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	233	422
Available-for-sale Securities, Debt Securities	9,997	9,880
US States and Political Subdivisions Debt Securities
Available For Sale Debt Securities Amortized Cost Basis	190,883	191,146
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	764	780
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	4,078	5,115
Available-for-sale Securities, Debt Securities	187,569	186,811
Foreign Government Debt
Available For Sale Debt Securities Amortized Cost Basis	4,372	5,098
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	17	13
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	107	157
Available-for-sale Securities, Debt Securities	4,282	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	125	96
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	80	448
Available-for-sale Securities, Debt Securities	10,051	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	154	178
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Available-for-sale Securities, Equity Securities	1,766	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	49	30
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	43	75
Available-for-sale Securities, Equity Securities	$ 3,594	$ 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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