Investment Securities (Tables)

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

The following table is the schedule of Available-For-Sale Securities at December 31, 2015 and 2014:

Available-For-Sale Securities
	U.S. Agency Obligations		State and Municipal Obligations		Mortgage- Backed Securities - Residential		Corporate and Other Debt Securities		Mutual Funds and Equity Securities		Total Available- For-Sale Securities
December 31, 2015
Available-For-Sale Securities,   at Amortized Cost	$	155,932	$	52,306	$	177,376	$	14,544	$	1,120	$	401,278
Available-For-Sale Securities,   at Fair Value	155,782		52,408		178,588		14,299		1,232		402,309
Gross Unrealized Gains	264		105		2,236		—		112		2,717
Gross Unrealized Losses	414		3		1,024		245		—		1,686
Available-For-Sale Securities,   Pledged as Collateral,   at Fair Value											310,857
Maturities of Debt Securities, at Amortized Cost:
Within One Year	—		23,954		13,460		5,613		—		43,027
From 1 - 5 Years	155,932		26,753		153,333		7,931		—		343,949
From 5 - 10 Years	—		999		10,583		—		—		11,582
Over 10 Years	—		600		—		1,000		—		1,600
Maturities of Debt Securities, at Fair Value:
Within One Year	—		23,972		13,658		5,609		—		43,239
From 1 - 5 Years	155,782		26,837		153,920		7,890		—		344,429
From 5 - 10 Years	—		999		11,010		—		—		12,009
Over 10 Years	—		600		—		800		—		1,400
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	76,802	$	4,289	$	99,569	$	3,616	$	—	$	184,276
12 Months or Longer	—		1,443		903		10,671		—		13,017
Total	$	76,802	$	5,732	$	100,472	$	14,287	$	—	$	197,293
Number of Securities in a   Continuous Loss Position	21		19		30		19		—		89
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	413	$	2	$	1,023	$	2	$	—	$	1,440
12 Months or Longer	1		1		1		243		—		246
Total	$	414	$	3	$	1,024	$	245	$	—	$	1,686

Available-For-Sale Securities
	U.S. Agency Obligations		State and Municipal Obligations		Mortgage- Backed Securities - Residential		Corporate and Other Debt Securities		Mutual Funds and Equity Securities		Total Available- For-Sale Securities
December 31, 2014
Available-For-Sale Securities,   at Amortized Cost	$	137,540	$	81,582	$	124,732	$	16,988	$	1,120	$	361,962
Available-For-Sale Securities,   at Fair Value	137,603		81,730		128,827		16,725		1,254		366,139
Gross Unrealized Gains	208		187		4,100		7		134		4,636
Gross Unrealized Losses	145		39		5		270		—		459
Available-For-Sale Securities,   Pledged as Collateral,   at Fair Value											267,384
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	39,631	$	3,309	$	82	$	—	$	—	$	43,022
12 Months or Longer	28,020		14,035		1,546		10,738		—		54,339
Total	$	67,651	$	17,344	$	1,628	$	10,738	$	—	$	97,361
Number of Securities in a   Continuous Loss Position	22		65		3		15		—		105
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	48	$	—	$	—	$	—	$	—	$	48
12 Months or Longer	97		39		5		270		—		411
Total	$	145	$	39	$	5	$	270	$	—	$	459

Held-to-maturity Securities [Table Text Block]

The following table is the schedule of Held-To-Maturity Securities at December 31, 2015 and 2014:

Held-To-Maturity Securities
	State and Municipal Obligations		Mortgage- Backed Securities - Residential		Corporate and Other Debt Securities		Total Held-To Maturity Securities
December 31, 2015
Held-To-Maturity Securities,   at Amortized Cost	$	226,053	$	93,558	$	1,000	$	320,611
Held-To-Maturity Securities,   at Fair Value	230,621		94,309		1,000		325,930
Gross Unrealized Gains	4,619		868		—		5,487
Gross Unrealized Losses	51		117		—		168
Held-To-Maturity Securities,   Pledged as Collateral,   at Fair Value							299,767
Maturities of Debt Securities, at Amortized Cost:
Within One Year	36,615		—		—		36,615
From 1 - 5 Years	91,014		61,550		—		152,564
From 5 - 10 Years	94,418		32,008		—		126,426
Over 10 Years	4,006		—		1,000		5,006

Held-To-Maturity Securities
	State and Municipal Obligations		Mortgage- Backed Securities - Residential		Corporate and Other Debt Securities		Total Held-To Maturity Securities
Maturities of Debt Securities, at Fair Value:
Within One Year	36,695		—		—		36,695
From 1 - 5 Years	93,335		62,040		—		155,375
From 5 - 10 Years	96,498		32,269		—		128,767
Over 10 Years	4,093		—		1,000		5,093
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	2,302	$	6,000	$	—	$	8,302
12 Months or Longer	11,764		4,154		—		15,918
Total	$	14,066	$	10,154	$	—	$	24,220
Number of Securities in a   Continuous Loss Position	54		8		—		62
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	11	$	93	$	—	$	104
12 Months or Longer	40		24		—		64
Total	$	51	$	117	$	—	$	168
December 31, 2014
Held-To-Maturity Securities,   at Amortized Cost	$	188,472	$	112,552	$	1,000	$	302,024
Held-To-Maturity Securities,   at Fair Value	193,252		114,314		1,000		308,566
Gross Unrealized Gains	4,935		1,770		—		6,705
Gross Unrealized Losses	155		8		—		163
Held-To-Maturity Securities,   Pledged as Collateral,   at Fair Value							282,640
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	$	2,143	$	4,581	$	—	$	6,724
12 Months or Longer	16,033		—		—		16,033
Total	$	18,176	$	4,581	$	—	$	22,757
Number of Securities in a   Continuous Loss Position	74		1		—		75
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$	17	$	8	$	—	$	25
12 Months or Longer	138		—		—		138
Total	$	155	$	8	$	—	$	163

Schedule of Cost Method Investments [Table Text Block]

Schedule of Federal Reserve Bank and Federal Home Loan Bank Stock

Federal Reserve Bank and Federal Home Loan Bank Stock are carried at cost.

	December 31,
	2015		2014
Federal Reserve Bank Stock	$	1,060	$	1,048
Federal Home Loan Bank Stock	7,779		3,803
Total Federal Reserve Bank and Federal Home Loan Bank Stock	$	8,839	$	4,851