Westamerica Bancorporation (WABC) 10-Q 4 May 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 26, 2018
Document Information [Line Items]
Entity Registrant Name	WESTAMERICA BANCORPORATION
Entity Central Index Key	311,094
Trading Symbol	wabc
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Common Stock, Shares Outstanding (in shares)		26,626,524
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets:
Cash and due from banks	$ 555,607	$ 575,002
Equity securities	1,764	1,800
Debt securities available for sale	2,351,970	2,191,707
Debt securities held to maturity, with fair values of: $1,098,895 at March 31, 2018 and $1,155,342 at December 31, 2017	1,114,287	1,158,864
Loans	1,228,584	1,287,982
Allowance for loan losses	(23,081)	(23,009)
Loans, net of allowance for loan losses	1,205,503	1,264,973
Other real estate owned	1,376	1,426
Premises and equipment, net	35,790	35,301
Identifiable intangibles, net	3,280	3,850
Goodwill	121,673	121,673
Other assets	159,786	158,450
Total Assets	5,551,036	5,513,046
Liabilities:
Noninterest-bearing deposits	2,179,157	2,197,526
Interest-bearing deposits	2,688,710	2,630,087
Total deposits	4,867,867	4,827,613
Short-term borrowed funds	65,356	58,471
Other liabilities	35,730	36,723
Total Liabilities	4,968,953	4,922,807
Contingencies (Note 10)
Shareholders' Equity:
Common stock (no par value), authorized - 150,000 shares Issued and outstanding: 26,591 at March 31, 2018 and 26,425 at December 31, 2017	439,817	431,734
Deferred compensation	1,533	1,533
Accumulated other comprehensive loss	(43,452)	(16,832)
Retained earnings	184,185	173,804
Total Shareholders' Equity	582,083	590,239
Total Liabilities and Shareholders' Equity	$ 5,551,036	$ 5,513,046

Consolidated Balance Sheets (C3

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) shares in Thousands, $ / shares in Thousands, $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt securities held to maturity, fair values	$ 1,098,895	$ 1,155,342
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	150,000	150,000
Common stock, issued (in shares)	26,591	26,425
Common stock, outstanding (in shares)	26,591	26,425

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest and Fee Income:
Loans	$ 14,697	$ 15,780
Equity securities	85	74
Debt securities available for sale	13,551	10,175
Debt securities held to maturity	6,174	7,295
Total Interest and Fee Income	34,507	33,324
Interest Expense:
Deposits	450	469
Short-term borrowed funds	9	11
Total Interest Expense	459	480
Net Interest and Fee Income	34,048	32,844
Provision for Loan Losses
Net Interest and Fee Income After Provision For Loan Losses	34,048	32,844
Noninterest Income:
Equity securities losses	(36)
Other noninterest income	1,062	1,256
Total Noninterest Income	11,955	11,657
Noninterest Expense:
Salaries and related benefits	13,351	13,070
Occupancy and equipment	4,691	4,887
Outsourced data processing services	2,340	2,139
Professional fees	785	611
Amortization of identifiable intangibles	570	800
Courier service	463	421
Other noninterest expense	2,014	2,687
Total Noninterest Expense	24,214	24,615
Income Before Income Taxes	21,789	19,886
Provision for income taxes	4,283	4,837
Net Income	$ 17,506	$ 15,049
Average Common Shares Outstanding (in shares)	26,532	26,171
Average Diluted Common Shares Outstanding (in shares)	26,665	26,329
Per Common Share Data:
Basic earnings (in dollars per share)	$ 0.66	$ 0.58
Diluted earnings (in dollars per share)	0.66	0.57
Dividends paid (in dollars per share)	$ 0.40	$ 0.39
Deposit Account [Member]
Noninterest Income:
Noninterest income revenue	$ 4,752	$ 4,923
Credit Card, Merchant Discount [Member]
Noninterest Income:
Noninterest income revenue	2,420	1,875
Debit Card [Member]
Noninterest Income:
Noninterest income revenue	1,605	1,481
Fiduciary and Trust [Member]
Noninterest Income:
Noninterest income revenue	743	702
ATM Processing Fees [Member]
Noninterest Income:
Noninterest income revenue	664	575
Financial Service, Other [Member]
Noninterest Income:
Noninterest income revenue	631	650
Financial Services Commission [Member]
Noninterest Income:
Noninterest income revenue	$ 114	$ 195

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income	$ 17,506	$ 15,049
Other comprehensive (loss) income:
Changes in net unrealized gains on debt securities available for sale	(32,846)	1,074
Deferred tax benefit (expense)	9,709	(452)
Changes in net unrealized gains on debt securities available for sale, net of tax	(23,137)	622
Post-retirement benefit transition obligation amortization		15
Deferred tax expense		(6)
Post-retirement benefit transition obligation amortization, net of tax		9
Total other comprehensive (loss) income	(23,137)	631
Total comprehensive (loss) income	$ (5,631)	$ 15,680

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Accumulated Deferred Compensation [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2016	25,907
Balance at Dec. 31, 2016	$ 404,606	$ 1,533	$ (10,074)	$ 165,302	$ 561,367
Net income				15,049	15,049
Other comprehensive income			631		631
Exercise of stock options (in shares)	376
Exercise of stock options	$ 17,593				17,593
Stock based compensation	456				456
Stock awarded to employees	15				15
Dividends				(10,223)	(10,223)
Balance (in shares) at Mar. 31, 2017	26,283
Balance at Mar. 31, 2017	$ 422,670	1,533	(9,443)	170,128	584,888
Balance (in shares) at Dec. 31, 2017	26,425
Balance at Dec. 31, 2017	$ 431,734	1,533	(16,832)	173,804	590,239
Cumulative effect of equity securities losses reclassified at Dec. 31, 2017			142	(142)
Adjusted Balance at Dec. 31, 2017	$ 431,734	1,533	(16,690)	173,662	590,239
Balance (in shares) at Dec. 31, 2017	26,425
Balance at Dec. 31, 2017	$ 431,734	1,533	(16,832)	173,804	590,239
Net income				17,506	17,506
Other comprehensive income			(23,137)		(23,137)
Exercise of stock options (in shares)	166
Exercise of stock options	$ 7,534				7,534
Stock based compensation	525				525
Stock awarded to employees	24				24
Dividends				(10,608)	(10,608)
Cumulative effect of equity securities losses reclassified at Dec. 31, 2017			142	(142)
Adjusted Balance at Dec. 31, 2017	431,734	1,533	(16,690)	173,662	590,239
Reclass stranded tax effects resulting from the Tax Cuts and Jobs Act			(3,625)	3,625
Balance (in shares) at Mar. 31, 2018	26,591
Balance at Mar. 31, 2018	$ 439,817	$ 1,533	$ (43,452)	$ 184,185	$ 582,083

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Operating Activities:
Net income		$ 17,506	$ 15,049
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization/accretion		1,643	5,754
Net amortization of deferred net loan (fees) cost		(40)	26
Decrease in interest income receivable		1,019	1,744
Life insurance premiums paid		(203)	(126)
Increase in income taxes payable		4,302	2,896
(Increase) decrease in deferred tax asset		(20)	1,441
Decrease in other assets		2,676	895
Stock option compensation expense		525	456
Increase in interest expense payable		15	8
Decrease in other liabilities		(984)	(2,864)
Equity securities losses		36
Writedown of premises and equipment		1	50
Net gain on sale of foreclosed assets			(55)
Net Cash Provided by Operating Activities		26,476	25,274
Investing Activities:
Net repayments of loans		59,959	1,526
Net receipts under FDIC(1) indemnification agreements	[1]		129
Purchases of debt securities available for sale		(279,327)	(51,297)
Proceeds from sale/maturity/calls of debt securities available for sale		86,218	47,600
Proceeds from maturity/calls of debt securities held to maturity		44,577	45,640
Purchases of premises and equipment		(1,413)	(501)
Proceeds from sale of FRB(2) stock	[2]		24
Proceeds from sale of foreclosed assets		50	1,014
Net Cash (Used in) Provided by Investing Activities		(89,936)	44,135
Financing Activities:
Net change in deposits		40,254	(6,768)
Net change in short-term borrowings		6,885	14,533
Exercise of stock options/issuance of shares		7,534	17,593
Common stock dividends paid		(10,608)	(10,223)
Net Cash Provided by Financing Activities		44,065	15,135
Net Change In Cash and Due from Banks		(19,395)	84,544
Cash and Due from Banks at Beginning of Period		575,002	462,271
Cash and Due from Banks at End of Period		555,607	546,815
Supplemental disclosure of noncash activities:
Loan collateral transferred to other real estate owned
Securities purchases pending settlement
Supplemental disclosure of cash flow activities:
Interest paid for the period		444	504
Income tax payments for the period			$ 500
[1]	Federal Deposit Insurance Corporation ("FDIC")
[2]	Federal Reserve Bank ("FRB")

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1: The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission and follow general practices within the banking industry. The results of operations reflect interim adjustments, all of which are of a normal recurring nature and which, in the opinion of Management, are necessary for a fair presentation of the results for the interim periods presented. The interim results for the three March 31, 2018 not 10 December 31, 2017.

Note 2 - Accounting Policies

Note 2 - Accounting Policies	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 2: The most significant accounting policies followed by the Company are presented in Note 1 10 December 31, 2017. Application of these principles requires the Company to make certain estimates, assumptions, and judgments that affect the amounts reported in the financial statements and accompanying notes. These estimates, assumptions, and judgments are based on information available as of the date of the financial statements; accordingly, as this information changes, the financial statements could reflect different estimates, assumptions, and judgments. Certain accounting policies inherently have a greater reliance on the use of estimates, assumptions and judgments and as such have a greater possibility of producing results that could be materially different than originally reported. Estimates, assumptions and judgments are necessary when assets and liabilities are required to be recorded at fair value, when a decline in the value of an asset not third Certain amounts in prior periods have been reclassified to conform to the current presentation. Recently Adopted Accounting Standards In the three March 31, 2018, FASB Accounting Standard Update (ASU) 2014 09 Revenue (Topic 606 May 2014. not 606 not Approximately 73% not Service Charges on Deposit Accounts Merchant Processing Services and Debit Card Fees Trust Fees Gains/Losses on Sales of OREO not The Company adopted the ASU on January 1, 2018 no FASB ASU 2016 01 Financial Instruments – Overall (Subtopic 825 10 January 2016. 9 The Company was required to adopt the ASU provisions on January 1, 2018, not January 1, 2018, $142 FASB ASU 2018 02 Income Statement – Reporting Comprehensive Income (Topic 220 February 2018. January 1, 2018, $3,625 Recently Issued Accounting Standards FASB ASU 2016 02, Leases (Topic 842 February 25, 2016. The Company will be required to adopt the ASU provisions January 1, 2019, December 31, 2017, 58 $17.5 not FASB ASU 2016 13, Financial Instruments – Credit Losses (Topic 326 June 16, 2016. The Company will be required to adopt the ASU provisions on January 1, 2020. FASB ASU 2017 08 Receivables – Non-Refundable Fees and Other Costs (Subtopic 310 20 March 2017. not The Company will be required to adopt the ASU provisions on January 1, 2019. FASB ASU 2017 12 Derivatives and Hedging (Topic 815 August 2017. one The Company will be required to adopt the ASU provisions January 1, 2019. not may one

Note 3 - Investment Securities

Note 3 - Investment Securities	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Note 3: Effective January 1, 2018, 2016 01, $1,800 $142 At March 31, 2018, $1,764 three March 31, 2018, $36 An analysis of the amortized cost and fair value by major categories of debt securities available for sale, which are carried at fair value with net unrealized gains (losses) reported on an after-tax basis as a component of cumulative other comprehensive income, and debt securities held to maturity, which are carried at amortized cost, follows: Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value At March 31, 2018 (In thousands) Debt securities available for sale Securities of U.S. Government sponsored entities $ 122,291 $ 1 $ (4,345 ) $ 117,947 Agency residential mortgage-backed securities (MBS) 879,824 500 (32,684 ) 847,640 Non-agency residential MBS 138 1 - 139 Agency commercial MBS 2,229 - (39 ) 2,190 Securities of U.S. Government entities 1,526 - (6 ) 1,520 Obligations of states and political subdivisions 181,386 2,910 (3,661 ) 180,635 Corporate securities 1,226,267 523 (24,891 ) 1,201,899 Total debt securities available for sale 2,413,661 3,935 (65,626 ) 2,351,970 Debt securities held to maturity Agency residential MBS 520,105 325 (16,728 ) 503,702 Non-agency residential MBS 4,179 77 - 4,256 Agency commercial MBS 1,902 - (9 ) 1,893 Obligations of states and political subdivisions 588,101 4,419 (3,476 ) 589,044 Total debt securities held to maturity 1,114,287 4,821 (20,213 ) 1,098,895 Total $ 3,527,948 $ 8,756 $ (85,839 ) $ 3,450,865 Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value At December 31, 2017 (In thousands) Debt securities available for sale Securities of U.S. Government sponsored entities $ 122,285 $ 1 $ (2,967 ) $ 119,319 Agency residential MBS 787,679 522 (20,495 ) 767,706 Non-agency residential MBS 153 1 - 154 Agency commercial MBS 2,244 - (25 ) 2,219 Securities of U.S. Government entities 1,612 - (22 ) 1,590 Obligations of states and political subdivisions 182,907 3,796 (1,482 ) 185,221 Corporate securities 1,123,671 1,104 (9,277 ) 1,115,498 Total debt securities available for sale 2,220,551 5,424 (34,268 ) 2,191,707 Debt securities held to maturity Agency residential MBS 545,883 606 (9,850 ) 536,639 Non-agency residential MBS 4,462 70 - 4,532 Agency commercial MBS 9,041 - (66 ) 8,975 Obligations of states and political subdivisions 599,478 7,736 (2,018 ) 605,196 Total debt securities held to maturity 1,158,864 8,412 (11,934 ) 1,155,342 Total $ 3,379,415 $ 13,836 $ (46,202 ) $ 3,347,049 The amortized cost and fair value of debt At March 31, 2018 Debt Securities Available Debt Securities Held for Sale to Maturity Amortized Fair Amortized Fair Cost Value Cost Value (In thousands) Maturity in years: 1 year or less $ 164,450 $ 162,099 $ 67,865 $ 68,636 Over 1 to 5 years 1,098,360 1,075,777 248,126 247,858 Over 5 to 10 years 225,690 223,481 269,159 269,527 Over 10 years 42,970 40,644 2,951 3,023 Subtotal 1,531,470 1,502,001 588,101 589,044 MBS 882,191 849,969 526,186 509,851 Total $ 2,413,661 $ 2,351,970 $ 1,114,287 $ 1,098,895 At December 31, 2017 Debt Securities Available Debt Securities Held for Sale to Maturity Amortized Fair Amortized Fair Cost Value Cost Value (In thousands) Maturity in years: 1 year or less $ 193,337 $ 193,385 $ 50,295 $ 51,105 Over 1 to 5 years 1,031,807 1,023,047 269,050 269,471 Over 5 to 10 years 159,266 160,042 277,170 281,546 Over 10 years 46,065 45,154 2,963 3,074 Subtotal 1,430,475 1,421,628 599,478 605,196 MBS 790,076 770,079 559,386 550,146 Total $ 2,220,551 $ 2,191,707 $ 1,158,864 $ 1,155,342 Expected maturities of mortgage-related securities can differ from contractual maturities because borrowers have the right to call or prepay obligations with or without call or prepayment penalties. In addition, such factors as prepayments and interest rates may March 31, 2018 December 31, 2017, no An analysis of the gross unrealized losses of the debt securities available for sale portfolio follows: Debt Securities Available for Sale At March 31, 2018 No. of Less than 12 months No. of 12 months or longer No. of Total Investment Unrealized Investment Unrealized Investment Unrealized Positions Fair Value Losses Positions Fair Value Losses Positions Fair Value Losses ($ in thousands) Securities of U.S. Government sponsored entities 2 $ 1,977 $ (12 ) 8 $ 115,889 $ (4,333 ) 10 $ 117,866 $ (4,345 ) Agency residential MBS 11 280,804 (6,163 ) 52 492,453 (26,521 ) 63 773,257 (32,684 ) Agency commercial MBS 2 2,190 (39 ) - - - 2 2,190 (39 ) Securities of U.S. Government entities - - - 3 1,520 (6 ) 3 1,520 (6 ) Obligations of states and political subdivisions 57 31,091 (636 ) 35 49,993 (3,025 ) 92 81,084 (3,661 ) Corporate securities 82 781,714 (16,548 ) 34 258,551 (8,343 ) 116 1,040,265 (24,891 ) Total 154 $ 1,097,776 $ (23,398 ) 132 $ 918,406 $ (42,228 ) 286 $ 2,016,182 $ (65,626 ) Debt Securities Held to Maturity At March 31, 2018 No. of Less than 12 months No. of 12 months or longer No. of Total Investment Unrecognized Investment Unrecognized Investment Unrecognized Positions Fair Value Losses Positions Fair Value Losses Positions Fair Value Losses ($ in thousands) Agency residential MBS 23 $ 33,919 $ (578 ) 67 $ 451,597 $ (16,150 ) 90 $ 485,516 $ (16,728 ) Agency commercial MBS 1 1,893 (9 ) - - - 1 1,893 (9 ) Obligations of states and political subdivisions 266 257,849 (1,557 ) 58 57,422 (1,919 ) 324 315,271 (3,476 ) Total 290 $ 293,661 $ (2,144 ) 125 $ 509,019 $ (18,069 ) 415 $ 802,680 $ (20,213 ) The unrealized losses on the Company’s debt securities were caused by market conditions for these types of investments, particularly changes in risk-free interest rates. The Company evaluates debt securities on a quarterly basis including changes in security ratings issued by rating agencies, changes in the financial condition of the issuer, and, for mortgage-backed and asset-backed securities, delinquency and loss information with respect to the underlying collateral, changes in the levels of subordination for the Company’s particular position within the repayment structure and remaining credit enhancement as compared to expected credit losses of the security. Substantially all of these securities continue to be investment grade rated by a major rating agency. In addition to monitoring credit rating agency evaluations, Management performs its own evaluations regarding the credit worthiness of the issuer or the securitized assets underlying asset backed securities. The Company does not not not not March 31, 2018. The fair values of the debt securities could decline in the future if the general economy deteriorates, inflation increases, credit ratings decline, the issuer’s financial condition deteriorates, or the liquidity for debt securities declines. As a result, other than temporary impairments may As of March 31, 2018 December 31, 2017, 696,058 $715,774 An analysis of gross unrealized losses of debt securities available for sale follows: Debt Securities Available for Sale At December 31, 2017 No. of Less than 12 months No. of 12 months or longer No. of Total Investment Unrealized Investment Unrealized Investment Unrealized Positions Fair Value Losses Positions Fair Value Losses Positions Fair Value Losses ($ in thousands) Securities of U.S. Government sponsored entities 1 $ 996 $ (2 ) 8 $ 117,252 $ (2,965 ) 9 $ 118,248 $ (2,967 ) Agency residential MBS 7 238,554 (1,501 ) 51 516,711 (18,994 ) 58 755,265 (20,495 ) Non-agency residential MBS 1 1 - - - - 1 1 - Agency commercial MBS 2 2,219 (25 ) - - - 2 2,219 (25 ) Securities of U.S. Government entities - - - 3 1,590 (22 ) 3 1,590 (22 ) Obligations of states and political subdivisions 50 21,453 (228 ) 35 52,071 (1,254 ) 85 73,524 (1,482 ) Corporate securities 64 571,112 (4,047 ) 38 282,924 (5,230 ) 102 854,036 (9,277 ) Total 125 $ 834,335 $ (5,803 ) 135 $ 970,548 $ (28,465 ) 260 $ 1,804,883 $ (34,268 ) An analysis of gross unrecognized losses of the debt securities held to maturity portfolio follows: Debt Securities Held to Maturity At December 31, 2017 No. of Less than 12 months No. of 12 months or longer No. of Total Investment Unrecognized Investment Unrecognized Investment Unrecognized Positions Fair Value Losses Positions Fair Value Losses Positions Fair Value Losses ($ in thousands) Agency residential MBS 15 $ 30,218 $ (201 ) 65 $ 479,775 $ (9,649 ) 80 $ 509,993 $ (9,850 ) Agency commercial MBS 1 1,913 (4 ) 1 7,062 (62 ) 2 8,975 (66 ) Obligations of states and political subdivisions 146 131,032 (553 ) 59 58,979 (1,465 ) 205 190,011 (2,018 ) Total 162 $ 163,163 $ (758 ) 125 $ 545,816 $ (11,176 ) 287 $ 708,979 $ (11,934 ) The following table provides information about the amount of interest income earned on investment securities which is fully taxable and which is exempt from regular federal income tax: For the Three Months Ended March 31, 2018 2017 (In thousands) Taxable $ 14,935 $ 12,147 Tax-exempt from regular federal income tax 4,875 5,397 Total interest income from investment securities $ 19,810 $ 17,544

Note 4 - Loans and Allowance fo

Note 4 - Loans and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Note 4: A summary of the major categories of loans outstanding is shown in the following table at the dates indicated. At March 31, At December 31, 2018 2017 (In thousands) Commercial $ 306,978 $ 335,996 Commercial Real Estate 553,318 568,584 Construction 2,941 5,649 Residential Real Estate 59,484 65,183 Consumer Installment & Other 305,863 312,570 Total $ 1,228,584 $ 1,287,982 Total loans outstanding reported above include loans purchased from the FDIC of $ 75,476 $83,478 March 31, 2018 December 31, 2017, Changes in the accretable yield for purchased loans were as follows: For the For the Three Months Ended Year Ended March 31, 2018 December 31, 2017 Accretable yield: (In thousands) Balance at the beginning of the period $ 738 $ 1,237 Reclassification from nonaccretable difference 313 1,852 Accretion (452 ) (2,351 ) Balance at the end of the period $ 599 $ 738 Accretion $ (452 ) $ (2,351 ) Change in FDIC indemnification 1 192 (Increase) in interest income $ (451 ) $ (2,159 ) The following summarizes activity in the allowance for loan losses: Allowance for Loan Losses For the Three Months Ended March 31, 2018 Consumer Commercial Residential Installment Commercial Real Estate Construction Real Estate and Other Unallocated Total (In thousands) Allowance for loan losses: Balance at beginning of period $ 7,746 $ 3,849 $ 335 $ 995 $ 6,418 $ 3,666 $ 23,009 Additions: (Reversal) provision (17 ) (25 ) (160 ) (87 ) 37 252 - Deductions: Chargeoffs (41 ) - - - (1,365 ) - (1,406 ) Recoveries 829 - - - 649 - 1,478 Net loan recoveries (losses) 788 - - - (716 ) - 72 Total allowance for loan losses $ 8,517 $ 3,824 $ 175 $ 908 $ 5,739 $ 3,918 $ 23,081 Allowance for Loan Losses For the Three Months Ended March 31, 2017 Consumer Commercial Residential Installment Commercial Real Estate Construction Real Estate and Other Unallocated Total (In thousands) Allowance for loan losses: Balance at beginning of period $ 8,327 $ 3,330 $ 152 $ 1,330 $ 7,980 $ 4,835 $ 25,954 Additions: Provision (reversal) 209 182 (40 ) (116 ) 106 (341 ) - Deductions: Chargeoffs (103 ) - - - (1,739 ) - (1,842 ) Recoveries 160 10 - - 637 - 807 Net loan recoveries (losses) 57 10 - - (1,102 ) - (1,035 ) Total allowance for loan losses $ 8,593 $ 3,522 $ 112 $ 1,214 $ 6,984 $ 4,494 $ 24,919 The allowance for loan losses and recorded investment in loans evaluated for impairment were as follows: Allowance for Loan Losses and Recorded Investment in Loans Evaluated for Impairment At March 31, 2018 Commercial Commercial Construction Residential Consumer Unallocated Total (In thousands) Allowance for loan losses: Individually evaluated for impairment $ 4,777 $ 214 $ - $ - $ - $ - $ 4,991 Collectively evaluated for impairment 3,740 3,610 175 908 5,739 3,918 18,090 Purchased loans with evidence of credit deterioration - - - - - - - Total $ 8,517 $ 3,824 $ 175 $ 908 $ 5,739 $ 3,918 $ 23,081 Carrying value of loans: Individually evaluated for impairment $ 10,513 $ 11,393 $ - $ 206 $ - $ - $ 22,112 Collectively evaluated for impairment 296,432 541,327 2,941 59,278 305,705 - 1,205,683 Purchased loans with evidence of credit deterioration 33 598 - - 158 - 789 Total $ 306,978 $ 553,318 $ 2,941 $ 59,484 $ 305,863 $ - $ 1,228,584 Allowance for Loan Losses and Recorded Investment in Loans Evaluated for Impairment At December 31, 2017 Commercial Commercial Construction Residential Consumer Unallocated Total (In thousands) Allowance for loan losses: Individually evaluated for impairment $ 4,814 $ 171 $ - $ - $ - $ - $ 4,985 Collectively evaluated for impairment 2,932 3,678 335 995 6,418 3,666 18,024 Purchased loans with evidence of credit deterioration - - - - - - - Total $ 7,746 $ 3,849 $ 335 $ 995 $ 6,418 $ 3,666 $ 23,009 Carrying value of loans: Individually evaluated for impairment $ 10,675 $ 14,234 $ - $ 208 $ - $ - $ 25,117 Collectively evaluated for impairment 325,291 553,769 5,649 64,975 312,406 - 1,262,090 Purchased loans with evidence of credit deterioration 30 581 - - 164 - 775 Total $ 335,996 $ 568,584 $ 5,649 $ 65,183 $ 312,570 $ - $ 1,287,982 The Bank’s customers are small businesses, professionals and consumers. Given the scale of these borrowers, corporate credit rating agencies do not The following summarizes the credit risk profile by internally assigned grade: Credit Risk Profile by Internally Assigned Grade At March 31, 2018 Commercial Commercial Construction Residential Consumer Total (In thousands) Grade: Pass $ 283,666 $ 547,740 $ 2,941 $ 59,202 $ 303,836 $ 1,197,385 Substandard 23,312 5,578 - 282 1,523 30,695 Doubtful - - - - 177 177 Loss - - - - 327 327 Total $ 306,978 $ 553,318 $ 2,941 $ 59,484 $ 305,863 $ 1,228,584 Credit risk profile reflects internally assigned grade of purchased covered loans without regard to FDIC indemnification. Credit Risk Profile by Internally Assigned Grade At December 31, 2017 Commercial Commercial Construction Residential Consumer Total (In thousands) Grade: Pass $ 324,185 $ 548,853 $ 5,649 $ 62,253 $ 310,429 $ 1,251,369 Substandard 11,811 19,731 - 2,930 1,370 35,842 Doubtful - - - - 1 1 Loss - - - - 770 770 Total $ 335,996 $ 568,584 $ 5,649 $ 65,183 $ 312,570 $ 1,287,982 Credit risk profile reflects internally assigned grade of purchased covered loans without regard to FDIC indemnification. The following tables summarize loans by delinquency and nonaccrual status: Summary of Loans by Delinquency and Nonaccrual Status At March 31, 2018 Current and 30-59 Days 60-89 Days Past Due 90 Nonaccrual Total Loans (In thousands) Commercial $ 306,396 $ 227 $ 84 $ - $ 271 $ 306,978 Commercial real estate 544,476 2,809 360 - 5,673 553,318 Construction 2,941 - - - - 2,941 Residential real estate 59,184 300 - - - 59,484 Consumer installment and other 302,214 2,667 531 255 196 305,863 Total $ 1,215,211 $ 6,003 $ 975 $ 255 $ 6,140 $ 1,228,584 Summary of Loans by Delinquency and Nonaccrual Status At December 31, 2017 Current and 30-59 Days 60-89 Days Past Due 90 Nonaccrual Total Loans (In thousands) Commercial $ 334,908 $ 627 $ 164 $ - $ 297 $ 335,996 Commercial real estate 561,883 1,143 125 - 5,433 568,584 Construction 5,649 - - - - 5,649 Residential real estate 65,183 - - - - 65,183 Consumer installment and other 307,445 3,321 1,077 531 196 312,570 Total $ 1,275,068 $ 5,091 $ 1,366 $ 531 $ 5,926 $ 1,287,982 There were no March 31, 2018 December 31, 2017. The following summarizes impaired loans: Impaired Loans At March 31, At December 31, 2018 2017 Unpaid Unpaid Recorded Principal Related Recorded Principal Related Investment Balance Allowance Investment Balance Allowance (In thousands) With no related allowance recorded: Commercial $ 1,183 $ 1,227 $ - $ 1,212 $ 1,271 $ - Commercial real estate 9,766 11,752 - 13,169 14,985 - Residential real estate 206 237 - 208 239 - Consumer installment and other 354 461 - 360 466 - Total with no related allowance recorded 11,509 13,677 - 14,949 16,961 - With an allowance recorded: Commercial 9,634 9,634 4,777 9,764 9,764 4,814 Commercial real estate 2,784 2,787 214 1,790 1,792 171 Total with an allowance recorded 12,418 12,421 4,991 11,554 11,556 4,985 Total $ 23,927 $ 26,098 $ 4,991 $ 26,503 $ 28,517 $ 4,985 Impaired loans include troubled debt restructured loans. Impaired loans at March 31, 2018, 9,550 4,110 December 31, 2017, $12,081 $4,285 Impaired Loans For the Three Months Ended March 31, 2018 2017 Average Recognized Average Recognized Recorded Interest Recorded Interest Investment Income Investment Income (In thousands) Commercial $ 10,897 $ 175 $ 11,292 $ 118 Commercial real estate 13,755 215 14,500 237 Construction - - - - Residential real estate 207 4 748 4 Consumer installment and other 357 3 543 7 Total $ 25,216 $ 397 $ 27,083 $ 366 The following tables provide information on troubled debt restructurings: Troubled Debt Restructurings At March 31, 2018 Period-End Individual Number of Pre-Modification Period-End Impairment Contracts Carrying Value Carrying Value Allowance ($ in thousands) Commercial 7 $ 2,393 $ 1,043 $ 39 Commercial real estate 9 9,537 8,301 - Residential real estate 1 241 206 - Total 17 $ 12,171 $ 9,550 $ 39 Troubled Debt Restructurings At December 31, 2017 Period-End Individual Number of Pre-Modification Period-End Impairment Contracts Carrying Value Carrying Value Allowance ($ in thousands) Commercial 7 $ 2,393 $ 1,085 $ 43 Commercial real estate 10 11,528 10,788 - Residential real estate 1 241 208 - Total 18 $ 14,162 $ 12,081 $ 43 During the three March 31, 2018, not three March 31, 2017, two $273 two three March 31, 2017 no three March 31, 2018 March 31, 2017. three March 31, 2018 2017, no 12 ninety There were no March 31, 2018 December 31, 2017. There were no March 31, 2018 December 31, 2017. At March 31, 2018 December 31, 2017, 1,376 1,905 $1,426 $1,905 - 0 $196 March 31, 2018 December 31, 2017.

Note 5 - Concentration of Credi

Note 5 - Concentration of Credit Risk	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	Note 5: Under the California Financial Code, credit extended to any one one not not 15 not 25 March 31, 2018, not one March 31, 2018, 36 $5 4, 48,623 $53,874 March 31, 2018 December 31, 2017, no 75% no 80% March 31, 2018, 72 $5

Note 6 - Other Assets

Note 6 - Other Assets	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Other Assets Disclosure [Text Block]	Note 6: Other assets consisted of the following: At March 31, At December 31, 2018 2017 (In thousands) Equity securities without readily determinable fair values: Federal Reserve Bank stock (1) $ 14,069 $ 14,069 Other investments 158 158 Total equity securities without readily determinable fair values 14,227 14,227 Life insurance cash surrender value 54,742 54,101 Net deferred tax asset 42,842 33,112 Limited partnership investments 9,519 10,119 Interest receivable 22,538 23,557 Prepaid assets 4,532 4,906 Other assets 11,386 18,428 Total other assets $ 159,786 $ 158,450 ( 1 A bank applying for membership in the Federal Reserve System is required to subscribe to stock in the Federal Reserve Bank (FRB) in its district in a sum equal to six The Company invests in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for low-income housing tax credits. At March 31, 2018, 9,519 2,299 December 31, 2017, $10,119 $2,299 March 31, 2018, $2,299 $722 2020, $131 2023, $90 2024 $1,356 2025 The amounts recognized in net income for these investments include: For the Three Months Ended March 31, 2018 2017 (In thousands) Investment loss included in pre-tax income $ 600 $ 450 Tax credits recognized in provision for income taxes 336 463

Note 7 - Goodwill and Identifia

Note 7 - Goodwill and Identifiable Intangible Assets	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	Note 7: The Company has recorded goodwill and other identifiable intangibles associated with purchase business combinations. Goodwill is not not three March 31, 2018 December 31, 2017. three March 31, 2018 December 31, 2017 no The carrying values of goodwill were: At March 31, 2018 At December 31, 2017 (In thousands) Goodwill $ 121,673 $ 121,673 The gross carrying amount of identifiable intangible assets and accumulated amortization was: At March 31, At December 31, 2018 2017 Gross Gross Carrying Accumulated Carrying Accumulated Amount Amortization Amount Amortization (In thousands) Core Deposit Intangibles $ 56,808 $ (53,528 ) $ 56,808 $ (52,987 ) Merchant Draft Processing Intangible 10,300 (10,300 ) 10,300 (10,271 ) Total Identifiable Intangible Assets $ 67,108 $ (63,828 ) $ 67,108 $ (63,258 ) As of March 31, 2018, Merchant Core Draft Deposit Processing Intangibles Intangible Total (In thousands) For the Three Months ended March 31, 2018 (actual) $ 541 $ 29 $ 570 Estimate for the remainder of year ending December 31, 2018 1,351 - 1,351 Estimate for year ending December 31, 2019 538 - 538 2020 287 - 287 2021 269 - 269 2022 252 - 252 2023 236 - 236

Note 8 - Deposits and Borrowed

Note 8 - Deposits and Borrowed Funds	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Deposits and Borrowed Funds [Text Block]	Note 8: The following table provides additional detail regarding deposits. Deposits At March 31, At December 31, 2018 2017 (In thousands) Noninterest-bearing $ 2,179,157 $ 2,197,526 Interest-bearing: Transaction 924,081 904,245 Savings 1,540,192 1,494,024 Time deposits less than $100 thousand 114,301 117,848 Time deposits $100 thousand through $250 thousand 74,436 76,578 Time deposits more than $250 thousand 35,700 37,392 Total deposits $ 4,867,867 $ 4,827,613 Demand deposit overdrafts of $ 788 $2,786 March 31, 2018 December 31, 2017, $100 97 three March 31, 2018 $106 three March 31, 2017. The following table provides additional detail regarding short-term borrowed funds. Repurchase Agreements (Sweep) Remaining Contractual Maturity of the Agreements Overnight and Continuous At March 31, 2018 At December 31, 2017 Repurchase agreements: (In thousands) Collateral securing borrowings: Securities of U.S. Government sponsored entities $ 73,165 $ 74,173 Agency residential MBS 64,266 58,251 Corporate securities 104,210 105,113 Total collateral carrying value $ 241,641 $ 237,537 Total short-term borrowed funds $ 65,356 $ 58,471

Note 9 - Fair Value Measurement

Note 9 - Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 9: The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Equity securities and available for sale debt securities are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may In accordance with the Fair Value Measurement and Disclosure topic of the Codification, the Company bases its fair values on the price that would be received to sell an asset or paid to transfer a liability in the principal market or most advantageous market for an asset or liability in an orderly transaction between market participants on the measurement date under current market conditions. A fair value measurement reflects all of the assumptions that market participants would use in pricing the asset or liability, including assumptions about the risk inherent in a particular valuation technique, the effect of a restriction on the sale or use of an asset, and the risk of nonperformance. The Company groups its assets and liabilities measured at fair value into a three Level 1 1 Level 2 not 2 Level 3 not The Company relies on independent vendor pricing services to measure fair value for equity securities, debt securities available for sale and debt securities held to maturity. The Company employs three 95 may not The Company regularly reviews the valuation techniques and assumptions used by its vendors and determines which valuation techniques are utilized based on observable market inputs for the type of securities being measured. The Company uses the information to determine the placement in the fair value hierarchy as level 1, 2 3. may three March 31, 2018 December 31, 2017, no 1, 2 3. Assets Recorded at Fair Value on a Recurring Basis The tables below present assets measured at fair value on a recurring basis on the dates indicated. At March 31, 2018 Fair Value Quoted Prices Significant Significant (In thousands) Equity securities Mutual funds $ 1,764 $ - $ 1,764 $ - Total equity securities 1,764 - 1,764 - Debt securities available for sale Securities of U.S. Government sponsored entities 117,947 - 117,947 - Agency residential MBS 847,640 - 847,640 - Non-agency residential MBS 139 - 139 - Agency commercial MBS 2,190 - 2,190 - Securities of U.S. Government entities 1,520 - 1,520 - Obligations of states and political subdivisions 180,635 - 180,635 - Corporate securities 1,201,899 - 1,201,899 - Total debt securities available for sale 2,351,970 - 2,351,970 - Total $ 2,353,734 $ - $ 2,353,734 $ - At December 31, 2017 Fair Value Quoted Prices Significant Significant (In thousands) Equity securities Mutual funds $ 1,800 $ - $ 1,800 $ - Total equity securities 1,800 - 1,800 - Debt securities available for sale Securities of U.S. Government sponsored entities 119,319 - 119,319 - Agency residential MBS 767,706 - 767,706 - Non-agency residential MBS 154 - 154 - Agency commercial MBS 2,219 - 2,219 - Securities of U.S. Government entities 1,590 - 1,590 - Obligations of states and political subdivisions 185,221 - 185,221 - Corporate securities 1,115,498 - 1,115,498 - Total debt securities available for sale 2,191,707 - 2,191,707 - Total $ 2,193,507 $ - $ 2,193,507 $ - Assets Recorded at Fair Value on a Nonrecurring Basis The Company may March 31, 2018 December 31, 2017, For the Three Months Ended At March 31, 2018 March 31, 2018 Carrying Value Level 1 Level 2 Level 3 Total Losses (In thousands) Other real estate owned $ 1,376 $ - $ - $ 1,376 $ - Impaired loans: Commercial 4,857 - - 4,857 - Commercial real estate 6,680 - - 6,680 - Total assets measured at fair value on a nonrecurring basis $ 12,913 $ - $ - $ 12,913 $ - For the Year Ended At December 31, 2017 December 31, 2017 Carrying Value Level 1 Level 2 Level 3 Total Losses (In thousands) Other real estate owned $ 1,426 $ - $ - $ 1,426 $ (219 ) Impaired loans: Commercial 4,950 - - 4,950 - Commercial real estate 5,904 - - 5,904 - Total assets measured at fair value on a nonrecurring basis $ 12,280 $ - $ - $ 12,280 $ (219 ) Level 3 third 10% 3 not not Disclosures about Fair Value of Financial Instruments The following section describes the valuation methodologies used by the Company for estimating fair value of financial instruments not 2016 01, Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities January 1, 2018. Cash and Due from Banks Debt Securities Held to Maturity 2 Loans Prior to adoption of ASU 2016 01, two $23,009 December 31, 2017 Deposit Liabilities no no Prior to adoption of ASU 2016 01, Short-Term Borrowed Funds The tables below are a summary of fair value estimates for financial instruments and the level of the fair value hierarchy within which the fair value measurements are categorized, excluding financial instruments recorded at fair value on a recurring basis. The values assigned do not may not may The Company has not not not not At March 31, 2018 Carrying Estimated Fair Quoted Prices Significant Significant Financial Assets: (In thousands) Cash and due from banks $ 555,607 $ 555,607 $ 555,607 $ - $ - Debt securities held to maturity 1,114,287 1,098,895 - 1,098,895 - Loans 1,205,503 1,244,670 - - 1,244,670 Financial Liabilities: Deposits $ 4,867,867 $ 4,864,792 $ - $ 4,643,430 $ 221,362 Short-term borrowed funds 65,356 65,356 - 65,356 - At December 31, 2017 Carrying Estimated Fair Quoted Prices Significant Significant Financial Assets: (In thousands) Cash and due from banks $ 575,002 $ 575,002 $ 575,002 $ - $ - Debt securities held to maturity 1,158,864 1,155,342 - 1,155,342 - Loans 1,264,973 1,257,811 - - 1,257,811 Financial Liabilities: Deposits $ 4,827,613 $ 4,824,586 $ - $ 4,595,795 $ 228,791 Short-term borrowed funds 58,471 58,471 - 58,471 - The majority of the Company’s standby letters of credit and other commitments to extend credit carry current market interest rates if converted to loans. No

Note 10 - Commitments and Conti

Note 10 - Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 10: Loan commitments are agreements to lend to a customer provided there is no not 282,428 $272,646 March 31, 2018 December 31, 2017, 3,849 $19,263 March 31, 2018 December 31, 2017, no March 31, 2018 December 31, 2017. 2,308 March 31, 2018 $2,308 December 31, 2017, Due to the nature of its business, the Company is subject to various threatened or filed legal cases. Based on the advice of legal counsel, the Company does not The Company has determined that it will be obligated to provide refunds of revenue recognized in prior years to some customers. The Company estimates the probable amount of these obligations will be $5,542

Note 11 - Earnings Per Common S

Note 11 - Earnings Per Common Share	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Earnings Per Share [Text Block]	Note 11: The table below shows earnings per common share and diluted earnings per common share. Basic earnings per common share are computed by dividing net income by the average number of common shares outstanding during the period. Diluted earnings per common share are computed by dividing net income by the average number of common shares outstanding during the period plus the impact of common stock equivalents. For the Three Months Ended March 31, 2018 2017 (In thousands, except per share data) Net income (numerator) $ 17,506 $ 15,049 Basic earnings per common share Weighted average number of common shares outstanding - basic (denominator) 26,532 26,171 Basic earnings per common share $ 0.66 $ 0.58 Diluted earnings per common share Weighted average number of common shares outstanding - basic 26,532 26,171 Add common stock equivalents for options 133 158 Weighted average number of common shares outstanding - diluted (denominator) 26,665 26,329 Diluted earnings per common share $ 0.66 $ 0.57 For the three March 31, 2018 2017, 491 299 not

Significant Accounting Policies

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Standards In the three March 31, 2018, FASB Accounting Standard Update (ASU) 2014 09 Revenue (Topic 606 May 2014. not 606 not Approximately 73% not Service Charges on Deposit Accounts Merchant Processing Services and Debit Card Fees Trust Fees Gains/Losses on Sales of OREO not The Company adopted the ASU on January 1, 2018 no FASB ASU 2016 01 Financial Instruments – Overall (Subtopic 825 10 January 2016. 9 The Company was required to adopt the ASU provisions on January 1, 2018, not January 1, 2018, $142 FASB ASU 2018 02 Income Statement – Reporting Comprehensive Income (Topic 220 February 2018. January 1, 2018, $3,625 Recently Issued Accounting Standards FASB ASU 2016 02, Leases (Topic 842 February 25, 2016. The Company will be required to adopt the ASU provisions January 1, 2019, December 31, 2017, 58 $17.5 not FASB ASU 2016 13, Financial Instruments – Credit Losses (Topic 326 June 16, 2016. The Company will be required to adopt the ASU provisions on January 1, 2020. FASB ASU 2017 08 Receivables – Non-Refundable Fees and Other Costs (Subtopic 310 20 March 2017. not The Company will be required to adopt the ASU provisions on January 1, 2019. FASB ASU 2017 12 Derivatives and Hedging (Topic 815 August 2017. one The Company will be required to adopt the ASU provisions January 1, 2019. not may one

Note 3 - Investment Securities

Note 3 - Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Debt Securities, Available-for-sale and Held-to-maturity [Table Text Block]	Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value At March 31, 2018 (In thousands) Debt securities available for sale Securities of U.S. Government sponsored entities $ 122,291 $ 1 $ (4,345 ) $ 117,947 Agency residential mortgage-backed securities (MBS) 879,824 500 (32,684 ) 847,640 Non-agency residential MBS 138 1 - 139 Agency commercial MBS 2,229 - (39 ) 2,190 Securities of U.S. Government entities 1,526 - (6 ) 1,520 Obligations of states and political subdivisions 181,386 2,910 (3,661 ) 180,635 Corporate securities 1,226,267 523 (24,891 ) 1,201,899 Total debt securities available for sale 2,413,661 3,935 (65,626 ) 2,351,970 Debt securities held to maturity Agency residential MBS 520,105 325 (16,728 ) 503,702 Non-agency residential MBS 4,179 77 - 4,256 Agency commercial MBS 1,902 - (9 ) 1,893 Obligations of states and political subdivisions 588,101 4,419 (3,476 ) 589,044 Total debt securities held to maturity 1,114,287 4,821 (20,213 ) 1,098,895 Total $ 3,527,948 $ 8,756 $ (85,839 ) $ 3,450,865 Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value At December 31, 2017 (In thousands) Debt securities available for sale Securities of U.S. Government sponsored entities $ 122,285 $ 1 $ (2,967 ) $ 119,319 Agency residential MBS 787,679 522 (20,495 ) 767,706 Non-agency residential MBS 153 1 - 154 Agency commercial MBS 2,244 - (25 ) 2,219 Securities of U.S. Government entities 1,612 - (22 ) 1,590 Obligations of states and political subdivisions 182,907 3,796 (1,482 ) 185,221 Corporate securities 1,123,671 1,104 (9,277 ) 1,115,498 Total debt securities available for sale 2,220,551 5,424 (34,268 ) 2,191,707 Debt securities held to maturity Agency residential MBS 545,883 606 (9,850 ) 536,639 Non-agency residential MBS 4,462 70 - 4,532 Agency commercial MBS 9,041 - (66 ) 8,975 Obligations of states and political subdivisions 599,478 7,736 (2,018 ) 605,196 Total debt securities held to maturity 1,158,864 8,412 (11,934 ) 1,155,342 Total $ 3,379,415 $ 13,836 $ (46,202 ) $ 3,347,049
Investments Classified by Contractual Maturity Date [Table Text Block]	At March 31, 2018 Debt Securities Available Debt Securities Held for Sale to Maturity Amortized Fair Amortized Fair Cost Value Cost Value (In thousands) Maturity in years: 1 year or less $ 164,450 $ 162,099 $ 67,865 $ 68,636 Over 1 to 5 years 1,098,360 1,075,777 248,126 247,858 Over 5 to 10 years 225,690 223,481 269,159 269,527 Over 10 years 42,970 40,644 2,951 3,023 Subtotal 1,531,470 1,502,001 588,101 589,044 MBS 882,191 849,969 526,186 509,851 Total $ 2,413,661 $ 2,351,970 $ 1,114,287 $ 1,098,895 At December 31, 2017 Debt Securities Available Debt Securities Held for Sale to Maturity Amortized Fair Amortized Fair Cost Value Cost Value (In thousands) Maturity in years: 1 year or less $ 193,337 $ 193,385 $ 50,295 $ 51,105 Over 1 to 5 years 1,031,807 1,023,047 269,050 269,471 Over 5 to 10 years 159,266 160,042 277,170 281,546 Over 10 years 46,065 45,154 2,963 3,074 Subtotal 1,430,475 1,421,628 599,478 605,196 MBS 790,076 770,079 559,386 550,146 Total $ 2,220,551 $ 2,191,707 $ 1,158,864 $ 1,155,342
Schedule of Unrealized Loss on Investments [Table Text Block]	Debt Securities Available for Sale At March 31, 2018 No. of Less than 12 months No. of 12 months or longer No. of Total Investment Unrealized Investment Unrealized Investment Unrealized Positions Fair Value Losses Positions Fair Value Losses Positions Fair Value Losses ($ in thousands) Securities of U.S. Government sponsored entities 2 $ 1,977 $ (12 ) 8 $ 115,889 $ (4,333 ) 10 $ 117,866 $ (4,345 ) Agency residential MBS 11 280,804 (6,163 ) 52 492,453 (26,521 ) 63 773,257 (32,684 ) Agency commercial MBS 2 2,190 (39 ) - - - 2 2,190 (39 ) Securities of U.S. Government entities - - - 3 1,520 (6 ) 3 1,520 (6 ) Obligations of states and political subdivisions 57 31,091 (636 ) 35 49,993 (3,025 ) 92 81,084 (3,661 ) Corporate securities 82 781,714 (16,548 ) 34 258,551 (8,343 ) 116 1,040,265 (24,891 ) Total 154 $ 1,097,776 $ (23,398 ) 132 $ 918,406 $ (42,228 ) 286 $ 2,016,182 $ (65,626 ) Debt Securities Held to Maturity At March 31, 2018 No. of Less than 12 months No. of 12 months or longer No. of Total Investment Unrecognized Investment Unrecognized Investment Unrecognized Positions Fair Value Losses Positions Fair Value Losses Positions Fair Value Losses ($ in thousands) Agency residential MBS 23 $ 33,919 $ (578 ) 67 $ 451,597 $ (16,150 ) 90 $ 485,516 $ (16,728 ) Agency commercial MBS 1 1,893 (9 ) - - - 1 1,893 (9 ) Obligations of states and political subdivisions 266 257,849 (1,557 ) 58 57,422 (1,919 ) 324 315,271 (3,476 ) Total 290 $ 293,661 $ (2,144 ) 125 $ 509,019 $ (18,069 ) 415 $ 802,680 $ (20,213 ) Debt Securities Available for Sale At December 31, 2017 No. of Less than 12 months No. of 12 months or longer No. of Total Investment Unrealized Investment Unrealized Investment Unrealized Positions Fair Value Losses Positions Fair Value Losses Positions Fair Value Losses ($ in thousands) Securities of U.S. Government sponsored entities 1 $ 996 $ (2 ) 8 $ 117,252 $ (2,965 ) 9 $ 118,248 $ (2,967 ) Agency residential MBS 7 238,554 (1,501 ) 51 516,711 (18,994 ) 58 755,265 (20,495 ) Non-agency residential MBS 1 1 - - - - 1 1 - Agency commercial MBS 2 2,219 (25 ) - - - 2 2,219 (25 ) Securities of U.S. Government entities - - - 3 1,590 (22 ) 3 1,590 (22 ) Obligations of states and political subdivisions 50 21,453 (228 ) 35 52,071 (1,254 ) 85 73,524 (1,482 ) Corporate securities 64 571,112 (4,047 ) 38 282,924 (5,230 ) 102 854,036 (9,277 ) Total 125 $ 834,335 $ (5,803 ) 135 $ 970,548 $ (28,465 ) 260 $ 1,804,883 $ (34,268 ) Debt Securities Held to Maturity At December 31, 2017 No. of Less than 12 months No. of 12 months or longer No. of Total Investment Unrecognized Investment Unrecognized Investment Unrecognized Positions Fair Value Losses Positions Fair Value Losses Positions Fair Value Losses ($ in thousands) Agency residential MBS 15 $ 30,218 $ (201 ) 65 $ 479,775 $ (9,649 ) 80 $ 509,993 $ (9,850 ) Agency commercial MBS 1 1,913 (4 ) 1 7,062 (62 ) 2 8,975 (66 ) Obligations of states and political subdivisions 146 131,032 (553 ) 59 58,979 (1,465 ) 205 190,011 (2,018 ) Total 162 $ 163,163 $ (758 ) 125 $ 545,816 $ (11,176 ) 287 $ 708,979 $ (11,934 )
Interest Income from Investments [Table Text Block]	For the Three Months Ended March 31, 2018 2017 (In thousands) Taxable $ 14,935 $ 12,147 Tax-exempt from regular federal income tax 4,875 5,397 Total interest income from investment securities $ 19,810 $ 17,544

Note 4 - Loans and Allowance 21

Note 4 - Loans and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Loans Receivable [Table Text Block]	At March 31, At December 31, 2018 2017 (In thousands) Commercial $ 306,978 $ 335,996 Commercial Real Estate 553,318 568,584 Construction 2,941 5,649 Residential Real Estate 59,484 65,183 Consumer Installment & Other 305,863 312,570 Total $ 1,228,584 $ 1,287,982
Accretable Yield Reconciliation Schedule [Table Text Block]	For the For the Three Months Ended Year Ended March 31, 2018 December 31, 2017 Accretable yield: (In thousands) Balance at the beginning of the period $ 738 $ 1,237 Reclassification from nonaccretable difference 313 1,852 Accretion (452 ) (2,351 ) Balance at the end of the period $ 599 $ 738 Accretion $ (452 ) $ (2,351 ) Change in FDIC indemnification 1 192 (Increase) in interest income $ (451 ) $ (2,159 )
Schedule of Credit Losses Related to Financing Receivables, Current and Noncurrent [Table Text Block]	Allowance for Loan Losses For the Three Months Ended March 31, 2018 Consumer Commercial Residential Installment Commercial Real Estate Construction Real Estate and Other Unallocated Total (In thousands) Allowance for loan losses: Balance at beginning of period $ 7,746 $ 3,849 $ 335 $ 995 $ 6,418 $ 3,666 $ 23,009 Additions: (Reversal) provision (17 ) (25 ) (160 ) (87 ) 37 252 - Deductions: Chargeoffs (41 ) - - - (1,365 ) - (1,406 ) Recoveries 829 - - - 649 - 1,478 Net loan recoveries (losses) 788 - - - (716 ) - 72 Total allowance for loan losses $ 8,517 $ 3,824 $ 175 $ 908 $ 5,739 $ 3,918 $ 23,081 Allowance for Loan Losses For the Three Months Ended March 31, 2017 Consumer Commercial Residential Installment Commercial Real Estate Construction Real Estate and Other Unallocated Total (In thousands) Allowance for loan losses: Balance at beginning of period $ 8,327 $ 3,330 $ 152 $ 1,330 $ 7,980 $ 4,835 $ 25,954 Additions: Provision (reversal) 209 182 (40 ) (116 ) 106 (341 ) - Deductions: Chargeoffs (103 ) - - - (1,739 ) - (1,842 ) Recoveries 160 10 - - 637 - 807 Net loan recoveries (losses) 57 10 - - (1,102 ) - (1,035 ) Total allowance for loan losses $ 8,593 $ 3,522 $ 112 $ 1,214 $ 6,984 $ 4,494 $ 24,919
Schedule of Recorded Investment in Loans Evaluated for Impairment [Table Text Block]	Allowance for Loan Losses and Recorded Investment in Loans Evaluated for Impairment At March 31, 2018 Commercial Commercial Construction Residential Consumer Unallocated Total (In thousands) Allowance for loan losses: Individually evaluated for impairment $ 4,777 $ 214 $ - $ - $ - $ - $ 4,991 Collectively evaluated for impairment 3,740 3,610 175 908 5,739 3,918 18,090 Purchased loans with evidence of credit deterioration - - - - - - - Total $ 8,517 $ 3,824 $ 175 $ 908 $ 5,739 $ 3,918 $ 23,081 Carrying value of loans: Individually evaluated for impairment $ 10,513 $ 11,393 $ - $ 206 $ - $ - $ 22,112 Collectively evaluated for impairment 296,432 541,327 2,941 59,278 305,705 - 1,205,683 Purchased loans with evidence of credit deterioration 33 598 - - 158 - 789 Total $ 306,978 $ 553,318 $ 2,941 $ 59,484 $ 305,863 $ - $ 1,228,584 Allowance for Loan Losses and Recorded Investment in Loans Evaluated for Impairment At December 31, 2017 Commercial Commercial Construction Residential Consumer Unallocated Total (In thousands) Allowance for loan losses: Individually evaluated for impairment $ 4,814 $ 171 $ - $ - $ - $ - $ 4,985 Collectively evaluated for impairment 2,932 3,678 335 995 6,418 3,666 18,024 Purchased loans with evidence of credit deterioration - - - - - - - Total $ 7,746 $ 3,849 $ 335 $ 995 $ 6,418 $ 3,666 $ 23,009 Carrying value of loans: Individually evaluated for impairment $ 10,675 $ 14,234 $ - $ 208 $ - $ - $ 25,117 Collectively evaluated for impairment 325,291 553,769 5,649 64,975 312,406 - 1,262,090 Purchased loans with evidence of credit deterioration 30 581 - - 164 - 775 Total $ 335,996 $ 568,584 $ 5,649 $ 65,183 $ 312,570 $ - $ 1,287,982
Financing Receivable Credit Quality Indicators [Table Text Block]	Credit Risk Profile by Internally Assigned Grade At March 31, 2018 Commercial Commercial Construction Residential Consumer Total (In thousands) Grade: Pass $ 283,666 $ 547,740 $ 2,941 $ 59,202 $ 303,836 $ 1,197,385 Substandard 23,312 5,578 - 282 1,523 30,695 Doubtful - - - - 177 177 Loss - - - - 327 327 Total $ 306,978 $ 553,318 $ 2,941 $ 59,484 $ 305,863 $ 1,228,584 Credit Risk Profile by Internally Assigned Grade At December 31, 2017 Commercial Commercial Construction Residential Consumer Total (In thousands) Grade: Pass $ 324,185 $ 548,853 $ 5,649 $ 62,253 $ 310,429 $ 1,251,369 Substandard 11,811 19,731 - 2,930 1,370 35,842 Doubtful - - - - 1 1 Loss - - - - 770 770 Total $ 335,996 $ 568,584 $ 5,649 $ 65,183 $ 312,570 $ 1,287,982
Past Due Financing Receivables [Table Text Block]	Summary of Loans by Delinquency and Nonaccrual Status At March 31, 2018 Current and 30-59 Days 60-89 Days Past Due 90 Nonaccrual Total Loans (In thousands) Commercial $ 306,396 $ 227 $ 84 $ - $ 271 $ 306,978 Commercial real estate 544,476 2,809 360 - 5,673 553,318 Construction 2,941 - - - - 2,941 Residential real estate 59,184 300 - - - 59,484 Consumer installment and other 302,214 2,667 531 255 196 305,863 Total $ 1,215,211 $ 6,003 $ 975 $ 255 $ 6,140 $ 1,228,584 Summary of Loans by Delinquency and Nonaccrual Status At December 31, 2017 Current and 30-59 Days 60-89 Days Past Due 90 Nonaccrual Total Loans (In thousands) Commercial $ 334,908 $ 627 $ 164 $ - $ 297 $ 335,996 Commercial real estate 561,883 1,143 125 - 5,433 568,584 Construction 5,649 - - - - 5,649 Residential real estate 65,183 - - - - 65,183 Consumer installment and other 307,445 3,321 1,077 531 196 312,570 Total $ 1,275,068 $ 5,091 $ 1,366 $ 531 $ 5,926 $ 1,287,982
Impaired Financing Receivables [Table Text Block]	Impaired Loans At March 31, At December 31, 2018 2017 Unpaid Unpaid Recorded Principal Related Recorded Principal Related Investment Balance Allowance Investment Balance Allowance (In thousands) With no related allowance recorded: Commercial $ 1,183 $ 1,227 $ - $ 1,212 $ 1,271 $ - Commercial real estate 9,766 11,752 - 13,169 14,985 - Residential real estate 206 237 - 208 239 - Consumer installment and other 354 461 - 360 466 - Total with no related allowance recorded 11,509 13,677 - 14,949 16,961 - With an allowance recorded: Commercial 9,634 9,634 4,777 9,764 9,764 4,814 Commercial real estate 2,784 2,787 214 1,790 1,792 171 Total with an allowance recorded 12,418 12,421 4,991 11,554 11,556 4,985 Total $ 23,927 $ 26,098 $ 4,991 $ 26,503 $ 28,517 $ 4,985
Impaired Financing Receivables Supplemental Schedule [Table Text Block]	Impaired Loans For the Three Months Ended March 31, 2018 2017 Average Recognized Average Recognized Recorded Interest Recorded Interest Investment Income Investment Income (In thousands) Commercial $ 10,897 $ 175 $ 11,292 $ 118 Commercial real estate 13,755 215 14,500 237 Construction - - - - Residential real estate 207 4 748 4 Consumer installment and other 357 3 543 7 Total $ 25,216 $ 397 $ 27,083 $ 366
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	Troubled Debt Restructurings At March 31, 2018 Period-End Individual Number of Pre-Modification Period-End Impairment Contracts Carrying Value Carrying Value Allowance ($ in thousands) Commercial 7 $ 2,393 $ 1,043 $ 39 Commercial real estate 9 9,537 8,301 - Residential real estate 1 241 206 - Total 17 $ 12,171 $ 9,550 $ 39 Troubled Debt Restructurings At December 31, 2017 Period-End Individual Number of Pre-Modification Period-End Impairment Contracts Carrying Value Carrying Value Allowance ($ in thousands) Commercial 7 $ 2,393 $ 1,085 $ 43 Commercial real estate 10 11,528 10,788 - Residential real estate 1 241 208 - Total 18 $ 14,162 $ 12,081 $ 43

Note 6 - Other Assets (Tables)

Note 6 - Other Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Other Assets [Table Text Block]	At March 31, At December 31, 2018 2017 (In thousands) Equity securities without readily determinable fair values: Federal Reserve Bank stock (1) $ 14,069 $ 14,069 Other investments 158 158 Total equity securities without readily determinable fair values 14,227 14,227 Life insurance cash surrender value 54,742 54,101 Net deferred tax asset 42,842 33,112 Limited partnership investments 9,519 10,119 Interest receivable 22,538 23,557 Prepaid assets 4,532 4,906 Other assets 11,386 18,428 Total other assets $ 159,786 $ 158,450
Schedule of Amounts Recognized in Net Income [Table Text Block]	For the Three Months Ended March 31, 2018 2017 (In thousands) Investment loss included in pre-tax income $ 600 $ 450 Tax credits recognized in provision for income taxes 336 463

Note 7 - Goodwill and Identif23

Note 7 - Goodwill and Identifiable Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Goodwill [Table Text Block]	At March 31, 2018 At December 31, 2017 (In thousands) Goodwill $ 121,673 $ 121,673
Schedule of Finite-Lived Intangible Assets [Table Text Block]	At March 31, At December 31, 2018 2017 Gross Gross Carrying Accumulated Carrying Accumulated Amount Amortization Amount Amortization (In thousands) Core Deposit Intangibles $ 56,808 $ (53,528 ) $ 56,808 $ (52,987 ) Merchant Draft Processing Intangible 10,300 (10,300 ) 10,300 (10,271 ) Total Identifiable Intangible Assets $ 67,108 $ (63,828 ) $ 67,108 $ (63,258 )
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Merchant Core Draft Deposit Processing Intangibles Intangible Total (In thousands) For the Three Months ended March 31, 2018 (actual) $ 541 $ 29 $ 570 Estimate for the remainder of year ending December 31, 2018 1,351 - 1,351 Estimate for year ending December 31, 2019 538 - 538 2020 287 - 287 2021 269 - 269 2022 252 - 252 2023 236 - 236

Note 8 - Deposits and Borrowe24

Note 8 - Deposits and Borrowed Funds (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Deposit Liabilities, Type [Table Text Block]	Deposits At March 31, At December 31, 2018 2017 (In thousands) Noninterest-bearing $ 2,179,157 $ 2,197,526 Interest-bearing: Transaction 924,081 904,245 Savings 1,540,192 1,494,024 Time deposits less than $100 thousand 114,301 117,848 Time deposits $100 thousand through $250 thousand 74,436 76,578 Time deposits more than $250 thousand 35,700 37,392 Total deposits $ 4,867,867 $ 4,827,613
Schedule of Repurchase Agreements [Table Text Block]	Repurchase Agreements (Sweep) Remaining Contractual Maturity of the Agreements Overnight and Continuous At March 31, 2018 At December 31, 2017 Repurchase agreements: (In thousands) Collateral securing borrowings: Securities of U.S. Government sponsored entities $ 73,165 $ 74,173 Agency residential MBS 64,266 58,251 Corporate securities 104,210 105,113 Total collateral carrying value $ 241,641 $ 237,537 Total short-term borrowed funds $ 65,356 $ 58,471

Note 9 - Fair Value Measureme25

Note 9 - Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	At March 31, 2018 Fair Value Quoted Prices Significant Significant (In thousands) Equity securities Mutual funds $ 1,764 $ - $ 1,764 $ - Total equity securities 1,764 - 1,764 - Debt securities available for sale Securities of U.S. Government sponsored entities 117,947 - 117,947 - Agency residential MBS 847,640 - 847,640 - Non-agency residential MBS 139 - 139 - Agency commercial MBS 2,190 - 2,190 - Securities of U.S. Government entities 1,520 - 1,520 - Obligations of states and political subdivisions 180,635 - 180,635 - Corporate securities 1,201,899 - 1,201,899 - Total debt securities available for sale 2,351,970 - 2,351,970 - Total $ 2,353,734 $ - $ 2,353,734 $ - At December 31, 2017 Fair Value Quoted Prices Significant Significant (In thousands) Equity securities Mutual funds $ 1,800 $ - $ 1,800 $ - Total equity securities 1,800 - 1,800 - Debt securities available for sale Securities of U.S. Government sponsored entities 119,319 - 119,319 - Agency residential MBS 767,706 - 767,706 - Non-agency residential MBS 154 - 154 - Agency commercial MBS 2,219 - 2,219 - Securities of U.S. Government entities 1,590 - 1,590 - Obligations of states and political subdivisions 185,221 - 185,221 - Corporate securities 1,115,498 - 1,115,498 - Total debt securities available for sale 2,191,707 - 2,191,707 - Total $ 2,193,507 $ - $ 2,193,507 $ -
Fair Value Measurements, Nonrecurring [Table Text Block]	For the Three Months Ended At March 31, 2018 March 31, 2018 Carrying Value Level 1 Level 2 Level 3 Total Losses (In thousands) Other real estate owned $ 1,376 $ - $ - $ 1,376 $ - Impaired loans: Commercial 4,857 - - 4,857 - Commercial real estate 6,680 - - 6,680 - Total assets measured at fair value on a nonrecurring basis $ 12,913 $ - $ - $ 12,913 $ - For the Year Ended At December 31, 2017 December 31, 2017 Carrying Value Level 1 Level 2 Level 3 Total Losses (In thousands) Other real estate owned $ 1,426 $ - $ - $ 1,426 $ (219 ) Impaired loans: Commercial 4,950 - - 4,950 - Commercial real estate 5,904 - - 5,904 - Total assets measured at fair value on a nonrecurring basis $ 12,280 $ - $ - $ 12,280 $ (219 )
Fair Value, by Balance Sheet Grouping [Table Text Block]	At March 31, 2018 Carrying Estimated Fair Quoted Prices Significant Significant Financial Assets: (In thousands) Cash and due from banks $ 555,607 $ 555,607 $ 555,607 $ - $ - Debt securities held to maturity 1,114,287 1,098,895 - 1,098,895 - Loans 1,205,503 1,244,670 - - 1,244,670 Financial Liabilities: Deposits $ 4,867,867 $ 4,864,792 $ - $ 4,643,430 $ 221,362 Short-term borrowed funds 65,356 65,356 - 65,356 - At December 31, 2017 Carrying Estimated Fair Quoted Prices Significant Significant Financial Assets: (In thousands) Cash and due from banks $ 575,002 $ 575,002 $ 575,002 $ - $ - Debt securities held to maturity 1,158,864 1,155,342 - 1,155,342 - Loans 1,264,973 1,257,811 - - 1,257,811 Financial Liabilities: Deposits $ 4,827,613 $ 4,824,586 $ - $ 4,595,795 $ 228,791 Short-term borrowed funds 58,471 58,471 - 58,471 -

Note 11 - Earnings Per Common26

Note 11 - Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Three Months Ended March 31, 2018 2017 (In thousands, except per share data) Net income (numerator) $ 17,506 $ 15,049 Basic earnings per common share Weighted average number of common shares outstanding - basic (denominator) 26,532 26,171 Basic earnings per common share $ 0.66 $ 0.58 Diluted earnings per common share Weighted average number of common shares outstanding - basic 26,532 26,171 Add common stock equivalents for options 133 158 Weighted average number of common shares outstanding - diluted (denominator) 26,665 26,329 Diluted earnings per common share $ 0.66 $ 0.57

Note 2 - Accounting Policies (D

Note 2 - Accounting Policies (Details Textual) - USD ($) $ in Thousands	Jan. 01, 2018	Mar. 31, 2018	Dec. 31, 2017
Percentage of Revenue Out of Scope of ASU 2014-09		73.00%
Cumulative Effect of New Accounting Principle in Period of Adoption
Tax Cuts and Jobs Act of 2017, Reclassification From Aoci to Retained Earnings
Operating Leases, Future Minimum Payments Due, Total			17,500
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			(142)
Tax Cuts and Jobs Act of 2017, Reclassification From Aoci to Retained Earnings		3,625
Retained Earnings [Member] | Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (142)
Retained Earnings [Member] | Accounting Standards Update 2018-02 [Member]
Tax Cuts and Jobs Act of 2017, Reclassification From Aoci to Retained Earnings	3,625
AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 142
Tax Cuts and Jobs Act of 2017, Reclassification From Aoci to Retained Earnings		$ (3,625)
AOCI Attributable to Parent [Member] | Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	142
AOCI Attributable to Parent [Member] | Accounting Standards Update 2018-02 [Member]
Tax Cuts and Jobs Act of 2017, Reclassification From Aoci to Retained Earnings	$ (3,625)

Note 3 - Investment Securitie28

Note 3 - Investment Securities (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017
Equity Securities, FV-NI	$ 1,764		$ 1,800	$ 1,800
Cumulative Effect of New Accounting Principle in Period of Adoption
Unrealized Gain (Loss) on Securities	(36)
High Risk Collateralized Mortgage Obligations	0			0
Pledged Financial Instruments, Not Separately Reported, Securities, Total	$ 696,058			715,774
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption				(142)
Retained Earnings [Member] | Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			(142)
AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption				$ 142
AOCI Attributable to Parent [Member] | Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 142

Note 3 - Investment Securitie29

Note 3 - Investment Securities - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Investment Securities Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt securities available for sale, amortized cost	$ 2,413,661	$ 2,220,551
Debt securities available for sale, gross unrealized gains	3,935	5,424
Debt securities available for sale, gross unrealized losses	(65,626)	(34,268)
Debt securities available for sale	2,351,970	2,191,707
Debt securities held to maturity, amortized cost	1,114,287	1,158,864
Debt securities held to maturity, gross unrecognized gains	4,821	8,412
Debt securities held to maturity, gross unrecognized losses	(20,213)	(11,934)
Debt securities held to maturity, fair values	1,098,895	1,155,342
Debt securities, amortized cost	3,527,948	3,379,415
Debt securities, gross unrecognized gains	8,756	13,836
Debt securities, gross unrecognized losses	(85,839)	(46,202)
Debt securities, fair value	3,450,865	3,347,049
US Government-sponsored Enterprises Debt Securities [Member]
Debt securities available for sale, amortized cost	122,291	122,285
Debt securities available for sale, gross unrealized gains	1	1
Debt securities available for sale, gross unrealized losses	(4,345)	(2,967)
Debt securities available for sale	117,947	119,319
Agency Residential MBS [Member]
Debt securities available for sale, amortized cost	879,824	787,679
Debt securities available for sale, gross unrealized gains	500	522
Debt securities available for sale, gross unrealized losses	(32,684)	(20,495)
Debt securities available for sale	847,640	767,706
Debt securities held to maturity, amortized cost	520,105	545,883
Debt securities held to maturity, gross unrecognized gains	325	606
Debt securities held to maturity, gross unrecognized losses	(16,728)	(9,850)
Debt securities held to maturity, fair values	503,702	536,639
Non-agency Residential MBS [Member]
Debt securities available for sale, amortized cost	138	153
Debt securities available for sale, gross unrealized gains	1	1
Debt securities available for sale, gross unrealized losses
Debt securities available for sale	139	154
Debt securities held to maturity, amortized cost	4,179	4,462
Debt securities held to maturity, gross unrecognized gains	77	70
Debt securities held to maturity, gross unrecognized losses
Debt securities held to maturity, fair values	4,256	4,532
Agency Commercial MBS [Member]
Debt securities available for sale, amortized cost	2,229	2,244
Debt securities available for sale, gross unrealized gains
Debt securities available for sale, gross unrealized losses	(39)	(25)
Debt securities available for sale	2,190	2,219
Debt securities held to maturity, amortized cost	1,902	9,041
Debt securities held to maturity, gross unrecognized gains
Debt securities held to maturity, gross unrecognized losses	(9)	(66)
Debt securities held to maturity, fair values	1,893	8,975
US Government Agencies Debt Securities [Member]
Debt securities available for sale, amortized cost	1,526	1,612
Debt securities available for sale, gross unrealized gains
Debt securities available for sale, gross unrealized losses	(6)	(22)
Debt securities available for sale	1,520	1,590
US States and Political Subdivisions Debt Securities [Member]
Debt securities available for sale, amortized cost	181,386	182,907
Debt securities available for sale, gross unrealized gains	2,910	3,796
Debt securities available for sale, gross unrealized losses	(3,661)	(1,482)
Debt securities available for sale	180,635	185,221
Debt securities held to maturity, amortized cost	588,101	599,478
Debt securities held to maturity, gross unrecognized gains	4,419	7,736
Debt securities held to maturity, gross unrecognized losses	(3,476)	(2,018)
Debt securities held to maturity, fair values	589,044	605,196
Debt Security, Corporate, US [Member]
Debt securities available for sale, amortized cost	1,226,267	1,123,671
Debt securities available for sale, gross unrealized gains	523	1,104
Debt securities available for sale, gross unrealized losses	(24,891)	(9,277)
Debt securities available for sale	$ 1,201,899	$ 1,115,498

Note 3 - Investment Securitie30

Note 3 - Investment Securities - Amortized Cost and Estimated Market Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investment securities available for sale, amortized cost, 1 year or less	$ 164,450	$ 193,337
Investment securities available for sale, fair value, 1 year or less	162,099	193,385
Investment securities held to maturity, amortized cost, 1 year or less	67,865	50,295
Investment securities held to maturity, fair value, 1 year or less	68,636	51,105
Investment securities available for sale, amortized cost, over 1 to 5 years	1,098,360	1,031,807
Investment securities available for sale, fair value, over 1 to 5 years	1,075,777	1,023,047
Investment securities held to maturity, amortized cost, over 1 to 5 years	248,126	269,050
Investment securities held to maturity, fair value, over 1 to 5 years	247,858	269,471
Investment securities available for sale, amortized cost, over 5 to 10 years	225,690	159,266
Investment securities available for sale, fair value, over 5 to 10 years	223,481	160,042
Investment securities held to maturity, amortized cost, over 5 to 10 years	269,159	277,170
Investment securities held to maturity, fair value, over 5 to 10 years	269,527	281,546
Investment securities available for sale, amortized cost, over 10 years	42,970	46,065
Investment securities available for sale, fair value, over 10 years	40,644	45,154
Investment securities held to maturity, amortized cost, over 10 years	2,951	2,963
Investment securities held to maturity, fair value, over 10 years	3,023	3,074
Investment securities available for sale, amortized cost, subtotal	1,531,470	1,430,475
Investment securities available for sale, fair value, subtotal	1,502,001	1,421,628
Investment securities held to maturity, amortized cost, subtotal	588,101	599,478
Investment securities held to maturity, fair value, subtotal	589,044	605,196
Investment securities available for sale, amortized cost	882,191	790,076
Investment securities available for sale, fair value	849,969	770,079
Investment securities held to maturity, amortized cost	526,186	559,386
Investment securities held to maturity, fair value	509,851	550,146
Investment securities available for sale, amortized cost	2,413,661	2,220,551
Investment securities available for sale, fair value	2,351,970	2,191,707
Investment securities held to maturity, amortized cost	1,114,287	1,158,864
Investment securities held to maturity, fair value	$ 1,098,895	$ 1,155,342

Note 3 - Investment Securitie31

Note 3 - Investment Securities - Gross Unrealized Losses, Investment Securities Portfolio (Details) $ in Thousands	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Available for sale securities, less than 12 months, number of investment positions	154	125
Available for sale securities, less than 12 months, fair value	$ 1,097,776	$ 834,335
Available for sale securities, less than 12 months, unrealized losses	$ (23,398)	$ (5,803)
Available for sale securities, 12 months or longer, number of investment positions	132	135
Available for sale securities, 12 months or longer, fair value	$ 918,406	$ 970,548
Available for sale securities, 12 months or longer, unrealized losses	$ (42,228)	$ (28,465)
Available for sale securities, total, number of investment positions	286	260
Available for sale securities, total, fair value	$ 2,016,182	$ 1,804,883
Available for sale securities, total, unrealized losses	$ (65,626)	$ (34,268)
Held to Maturity securities, less than 12 months, number of investment positions	290	162
Held to Maturity securities, less than 12 months, fair value	$ 293,661	$ 163,163
Held to Maturity securities, less than 12 months, unrecognized losses	$ (2,144)	$ (758)
Held to Maturity securities, 12 months or longer, number of investment positions	125	125
Held to Maturity securities, 12 months or longer, fair value	$ 509,019	$ 545,816
Held to Maturity securities, 12 months or longer, unrecognized losses	$ (18,069)	$ (11,176)
Held to Maturity securities, total, number of investment positions	415	287
Held to Maturity securities, total, fair value	$ 802,680	$ 708,979
Held to Maturity securities, total, unrecognized losses	$ (20,213)	$ (11,934)
US Government-sponsored Enterprises Debt Securities [Member]
Available for sale securities, less than 12 months, number of investment positions	2	1
Available for sale securities, less than 12 months, fair value	$ 1,977	$ 996
Available for sale securities, less than 12 months, unrealized losses	$ (12)	$ (2)
Available for sale securities, 12 months or longer, number of investment positions	8	8
Available for sale securities, 12 months or longer, fair value	$ 115,889	$ 117,252
Available for sale securities, 12 months or longer, unrealized losses	$ (4,333)	$ (2,965)
Available for sale securities, total, number of investment positions	10	9
Available for sale securities, total, fair value	$ 117,866	$ 118,248
Available for sale securities, total, unrealized losses	$ (4,345)	$ (2,967)
Agency Residential MBS [Member]
Available for sale securities, less than 12 months, number of investment positions	11	7
Available for sale securities, less than 12 months, fair value	$ 280,804	$ 238,554
Available for sale securities, less than 12 months, unrealized losses	$ (6,163)	$ (1,501)
Available for sale securities, 12 months or longer, number of investment positions	52	51
Available for sale securities, 12 months or longer, fair value	$ 492,453	$ 516,711
Available for sale securities, 12 months or longer, unrealized losses	$ (26,521)	$ (18,994)
Available for sale securities, total, number of investment positions	63	58
Available for sale securities, total, fair value	$ 773,257	$ 755,265
Available for sale securities, total, unrealized losses	$ (32,684)	$ (20,495)
Held to Maturity securities, less than 12 months, number of investment positions	23	15
Held to Maturity securities, less than 12 months, fair value	$ 33,919	$ 30,218
Held to Maturity securities, less than 12 months, unrecognized losses	$ (578)	$ (201)
Held to Maturity securities, 12 months or longer, number of investment positions	67	65
Held to Maturity securities, 12 months or longer, fair value	$ 451,597	$ 479,775
Held to Maturity securities, 12 months or longer, unrecognized losses	$ (16,150)	$ (9,649)
Held to Maturity securities, total, number of investment positions	90	80
Held to Maturity securities, total, fair value	$ 485,516	$ 509,993
Held to Maturity securities, total, unrecognized losses	$ (16,728)	$ (9,850)
Agency Commercial MBS [Member]
Available for sale securities, less than 12 months, number of investment positions	2	2
Available for sale securities, less than 12 months, fair value	$ 2,190	$ 2,219
Available for sale securities, less than 12 months, unrealized losses	$ (39)	$ (25)
Available for sale securities, 12 months or longer, number of investment positions
Available for sale securities, 12 months or longer, fair value
Available for sale securities, 12 months or longer, unrealized losses
Available for sale securities, total, number of investment positions	2	2
Available for sale securities, total, fair value	$ 2,190	$ 2,219
Available for sale securities, total, unrealized losses	$ (39)	$ (25)
Held to Maturity securities, less than 12 months, number of investment positions	1	1
Held to Maturity securities, less than 12 months, fair value	$ 1,893	$ 1,913
Held to Maturity securities, less than 12 months, unrecognized losses	$ (9)	$ (4)
Held to Maturity securities, 12 months or longer, number of investment positions		1
Held to Maturity securities, 12 months or longer, fair value		$ 7,062
Held to Maturity securities, 12 months or longer, unrecognized losses		$ (62)
Held to Maturity securities, total, number of investment positions	1	2
Held to Maturity securities, total, fair value	$ 1,893	$ 8,975
Held to Maturity securities, total, unrecognized losses	$ (9)	$ (66)
US States and Political Subdivisions Debt Securities [Member]
Available for sale securities, less than 12 months, number of investment positions	57	50
Available for sale securities, less than 12 months, fair value	$ 31,091	$ 21,453
Available for sale securities, less than 12 months, unrealized losses	$ (636)	$ (228)
Available for sale securities, 12 months or longer, number of investment positions	35	35
Available for sale securities, 12 months or longer, fair value	$ 49,993	$ 52,071
Available for sale securities, 12 months or longer, unrealized losses	$ (3,025)	$ (1,254)
Available for sale securities, total, number of investment positions	92	85
Available for sale securities, total, fair value	$ 81,084	$ 73,524
Available for sale securities, total, unrealized losses	$ (3,661)	$ (1,482)
Held to Maturity securities, less than 12 months, number of investment positions	266	146
Held to Maturity securities, less than 12 months, fair value	$ 257,849	$ 131,032
Held to Maturity securities, less than 12 months, unrecognized losses	$ (1,557)	$ (553)
Held to Maturity securities, 12 months or longer, number of investment positions	58	59
Held to Maturity securities, 12 months or longer, fair value	$ 57,422	$ 58,979
Held to Maturity securities, 12 months or longer, unrecognized losses	$ (1,919)	$ (1,465)
Held to Maturity securities, total, number of investment positions	324	205
Held to Maturity securities, total, fair value	$ 315,271	$ 190,011
Held to Maturity securities, total, unrecognized losses	$ (3,476)	$ (2,018)
Non-agency Residential MBS [Member]
Available for sale securities, less than 12 months, number of investment positions		1
Available for sale securities, less than 12 months, fair value		$ 1
Available for sale securities, less than 12 months, unrealized losses
Available for sale securities, 12 months or longer, number of investment positions
Available for sale securities, 12 months or longer, fair value
Available for sale securities, 12 months or longer, unrealized losses
Available for sale securities, total, number of investment positions		1
Available for sale securities, total, fair value		$ 1
Available for sale securities, total, unrealized losses
US Government Agencies Debt Securities [Member]
Available for sale securities, less than 12 months, number of investment positions
Available for sale securities, less than 12 months, fair value
Available for sale securities, less than 12 months, unrealized losses
Available for sale securities, 12 months or longer, number of investment positions	3	3
Available for sale securities, 12 months or longer, fair value	$ 1,520	$ 1,590
Available for sale securities, 12 months or longer, unrealized losses	$ (6)	$ (22)
Available for sale securities, total, number of investment positions	3	3
Available for sale securities, total, fair value	$ 1,520	$ 1,590
Available for sale securities, total, unrealized losses	$ (6)	$ (22)
Debt Security, Corporate, US [Member]
Available for sale securities, less than 12 months, number of investment positions	82	64
Available for sale securities, less than 12 months, fair value	$ 781,714	$ 571,112
Available for sale securities, less than 12 months, unrealized losses	$ (16,548)	$ (4,047)
Available for sale securities, 12 months or longer, number of investment positions	34	38
Available for sale securities, 12 months or longer, fair value	$ 258,551	$ 282,924
Available for sale securities, 12 months or longer, unrealized losses	$ (8,343)	$ (5,230)
Available for sale securities, total, number of investment positions	116	102
Available for sale securities, total, fair value	$ 1,040,265	$ 854,036
Available for sale securities, total, unrealized losses	$ (24,891)	$ (9,277)

Note 3 - Investment Securitie32

Note 3 - Investment Securities - Interest Income From Investment Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Taxable	$ 14,935	$ 12,147
Tax-exempt from regular federal income tax	4,875	5,397
Total interest income from investment securities	$ 19,810	$ 17,544

Note 4 - Loans and Allowance 33

Note 4 - Loans and Allowance for Loan Losses (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Purchased Loans	$ 75,476		$ 83,478
Loans and Leases Receivable, Nonaccrual, Commitment to Lend	0		0
Financing Receivable, Modifications, Recorded Investment	9,550		12,081
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Pledged Financial Instruments, Not Separately Reported, Loans Receivable Pledged as Collateral, Total	$ 0		0
Loans Receivable Held-for-sale, Amount	0		0
Other Real Estate, Ending Balance	1,376		1,426
Other Real Estate, Reserve	1,905		1,905
Mortgage Loans in Process of Foreclosure, Amount			196
Residential Real Estate Included in OREO [Member]
Real Estate Acquired Through Foreclosure	$ 0		0
Under Market Modification to Payment Terms, Extended Maturity Date [Member]
Financing Receivable, Modifications, Recorded Investment		$ 273
Troubled Debt Restructurings During Period	0	2
Restructured Loans [Member]
Financing Receivable, Modifications, Recorded Investment	$ 9,550		12,081
Impaired Loans, Restructured, Nonaccrual Status	$ 4,110		$ 4,285

Note 4 - Loans and Allowance 34

Note 4 - Loans and Allowance for Loan Losses - Loans Receivable at Carrying Amount (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loans	$ 1,228,584	$ 1,287,982
Commercial Portfolio Segment [Member]
Loans	306,978	335,996
Commercial Real Estate Portfolio Segment [Member]
Loans	553,318	568,584
Construction Portfolio Segment [Member]
Loans	2,941	5,649
Residential Portfolio Segment [Member]
Loans	59,484	65,183
Consumer Portfolio Segment [Member]
Loans	$ 305,863	$ 312,570

Note 4 - Loans and Allowance 35

Note 4 - Loans and Allowance for Loan Losses - Changes in the Accretable Yield for Purchased Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Balance at the beginning of the period	$ 738	$ 1,237
Reclassification from nonaccretable difference	313	1,852
Accretion	(452)	(2,351)
Balance at the end of the period	599	738
Change in FDIC indemnification	1	192
(Increase) in interest income	$ (451)	$ (2,159)

Note 4 - Loans and Allowance 36

Note 4 - Loans and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Balance at beginning of period	$ 23,009	$ 25,954
(Reversal) provision
Chargeoffs	(1,406)	(1,842)
Recoveries	1,478	807
Net loan recoveries (losses)	72	(1,035)
Total allowance for loan losses	23,081	24,919
Unallocated Financing Receivable [Member]
Balance at beginning of period	3,666	4,835
(Reversal) provision	252	(341)
Chargeoffs
Recoveries
Net loan recoveries (losses)
Total allowance for loan losses	3,918	4,494
Commercial Portfolio Segment [Member]
Balance at beginning of period	7,746	8,327
(Reversal) provision	(17)	209
Chargeoffs	(41)	(103)
Recoveries	829	160
Net loan recoveries (losses)	788	57
Total allowance for loan losses	8,517	8,593
Commercial Real Estate Portfolio Segment [Member]
Balance at beginning of period	3,849	3,330
(Reversal) provision	(25)	182
Chargeoffs
Recoveries		10
Net loan recoveries (losses)		10
Total allowance for loan losses	3,824	3,522
Construction Portfolio Segment [Member]
Balance at beginning of period	335	152
(Reversal) provision	(160)	(40)
Chargeoffs
Recoveries
Net loan recoveries (losses)
Total allowance for loan losses	175	112
Residential Portfolio Segment [Member]
Balance at beginning of period	995	1,330
(Reversal) provision	(87)	(116)
Chargeoffs
Recoveries
Net loan recoveries (losses)
Total allowance for loan losses	908	1,214
Consumer Portfolio Segment [Member]
Balance at beginning of period	6,418	7,980
(Reversal) provision	37	106
Chargeoffs	(1,365)	(1,739)
Recoveries	649	637
Net loan recoveries (losses)	(716)	(1,102)
Total allowance for loan losses	$ 5,739	$ 6,984

Note 4 - Loans and Allowance 37

Note 4 - Loans and Allowance for Loan Losses - Recorded Investment in Loans Evaluated for Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Individually evaluated for impairment	$ 4,991	$ 4,985
Collectively evaluated for impairment	18,090	18,024
Total allowance for loan losses	23,081	23,009	$ 24,919	$ 25,954
Individually evaluated for impairment	22,112	25,117
Collectively evaluated for impairment	1,205,683	1,262,090
Total loans	1,228,584	1,287,982
Financial Asset Acquired with Credit Deterioration [Member]
Total allowance for loan losses	0	0
Total loans	789	775
Unallocated Financing Receivable [Member]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	3,918	3,666
Total allowance for loan losses	3,918	3,666	4,494	4,835
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Total loans	0	0
Unallocated Financing Receivable [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Total allowance for loan losses	0	0
Total loans	0	0
Commercial Portfolio Segment [Member]
Individually evaluated for impairment	4,777	4,814
Collectively evaluated for impairment	3,740	2,932
Total allowance for loan losses	8,517	7,746	8,593	8,327
Individually evaluated for impairment	10,513	10,675
Collectively evaluated for impairment	296,432	325,291
Total loans	306,978	335,996
Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Total allowance for loan losses	0	0
Total loans	33	30
Commercial Real Estate Portfolio Segment [Member]
Individually evaluated for impairment	214	171
Collectively evaluated for impairment	3,610	3,678
Total allowance for loan losses	3,824	3,849	3,522	3,330
Individually evaluated for impairment	11,393	14,234
Collectively evaluated for impairment	541,327	553,769
Total loans	553,318	568,584
Commercial Real Estate Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Total allowance for loan losses	0	0
Total loans	598	581
Construction Portfolio Segment [Member]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	175	335
Total allowance for loan losses	175	335	112	152
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2,941	5,649
Total loans	2,941	5,649
Construction Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Total allowance for loan losses	0	0
Total loans	0	0
Residential Portfolio Segment [Member]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	908	995
Total allowance for loan losses	908	995	1,214	1,330
Individually evaluated for impairment	206	208
Collectively evaluated for impairment	59,278	64,975
Total loans	59,484	65,183
Residential Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Total allowance for loan losses	0	0
Total loans	0	0
Consumer Portfolio Segment [Member]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	5,739	6,418
Total allowance for loan losses	5,739	6,418	$ 6,984	$ 7,980
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	305,705	312,406
Total loans	305,863	312,570
Consumer Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Total allowance for loan losses	0	0
Total loans	$ 158	$ 164

Note 4 - Loans and Allowance 38

Note 4 - Loans and Allowance for Loan Losses - Credit Risk Profile by Internally Assigned Grade (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loans	$ 1,228,584	$ 1,287,982
Pass [Member]
Loans	1,197,385	1,251,369
Substandard [Member]
Loans	30,695	35,842
Doubtful [Member]
Loans	177	1
Unlikely to be Collected Financing Receivable [Member]
Loans	327	770
Commercial Portfolio Segment [Member]
Loans	306,978	335,996
Commercial Portfolio Segment [Member] | Pass [Member]
Loans	283,666	324,185
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans	23,312	11,811
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans	0	0
Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	0	0
Commercial Real Estate Portfolio Segment [Member]
Loans	553,318	568,584
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans	547,740	548,853
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans	5,578	19,731
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Loans	0
Commercial Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	0	0
Construction Portfolio Segment [Member]
Loans	2,941	5,649
Construction Portfolio Segment [Member] | Pass [Member]
Loans	2,941	5,649
Construction Portfolio Segment [Member] | Substandard [Member]
Loans		0
Construction Portfolio Segment [Member] | Doubtful [Member]
Loans	0	0
Construction Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	0	0
Residential Portfolio Segment [Member]
Loans	59,484	65,183
Residential Portfolio Segment [Member] | Pass [Member]
Loans	59,202	62,253
Residential Portfolio Segment [Member] | Substandard [Member]
Loans	282	2,930
Residential Portfolio Segment [Member] | Doubtful [Member]
Loans	0	0
Residential Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	0	0
Consumer Portfolio Segment [Member]
Loans	305,863	312,570
Consumer Portfolio Segment [Member] | Pass [Member]
Loans	303,836	310,429
Consumer Portfolio Segment [Member] | Substandard [Member]
Loans	1,523	1,370
Consumer Portfolio Segment [Member] | Doubtful [Member]
Loans	177	1
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	$ 327	$ 770

Note 4 - Loans and Allowance 39

Note 4 - Loans and Allowance for Loan Losses - Loans by Delinquency and Nonaccrual Status (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current and accruing	$ 1,215,211	$ 1,275,068
Nonaccrual	6,140	5,926
Total loans	1,228,584	1,287,982
Financing Receivables, 30 to 59 Days Past Due [Member]
Past due and accruing	6,003	5,091
Financing Receivables, 60 to 89 Days Past Due [Member]
Past due and accruing	975	1,366
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past due and accruing	255	531
Commercial Portfolio Segment [Member]
Current and accruing	306,396	334,908
Nonaccrual	271	297
Total loans	306,978	335,996
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past due and accruing	227	627
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past due and accruing	84	164
Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past due and accruing	0	0
Commercial Real Estate Portfolio Segment [Member]
Current and accruing	544,476	561,883
Nonaccrual	5,673	5,433
Total loans	553,318	568,584
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past due and accruing	2,809	1,143
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past due and accruing	360	125
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past due and accruing	0	0
Construction Portfolio Segment [Member]
Current and accruing	2,941	5,649
Nonaccrual	0	0
Total loans	2,941	5,649
Construction Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past due and accruing	0	0
Construction Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past due and accruing	0	0
Construction Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past due and accruing	0	0
Residential Portfolio Segment [Member]
Current and accruing	59,184	65,183
Nonaccrual	0	0
Total loans	59,484	65,183
Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past due and accruing	300	0
Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past due and accruing	0	0
Residential Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past due and accruing	0	0
Consumer Portfolio Segment [Member]
Current and accruing	302,214	307,445
Nonaccrual	196	196
Total loans	305,863	312,570
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Past due and accruing	2,667	3,321
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Past due and accruing	531	1,077
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Past due and accruing	$ 255	$ 531

Note 4 - Loans and Allowance 40

Note 4 - Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Impaired loans with no related allowance recorded, recorded investment	$ 11,509	$ 14,949
Impaired loans with no related allowance recorded, unpaid principal balance	13,677	16,961
Impaired loans with an allowance recorded, recorded investment	12,418	11,554
Impaired loans with an allowance recorded, unpaid principal balance	12,421	11,556
Impaired loans with an allowance recorded, related allowance	4,991	4,985
Total impaired loans, recorded investment	23,927	26,503
Total impaired loans, unpaid principal balance	26,098	28,517
Commercial Portfolio Segment [Member]
Impaired loans with no related allowance recorded, recorded investment	1,183	1,212
Impaired loans with no related allowance recorded, unpaid principal balance	1,227	1,271
Impaired loans with an allowance recorded, recorded investment	9,634	9,764
Impaired loans with an allowance recorded, unpaid principal balance	9,634	9,764
Impaired loans with an allowance recorded, related allowance	4,777	4,814
Commercial Real Estate Portfolio Segment [Member]
Impaired loans with no related allowance recorded, recorded investment	9,766	13,169
Impaired loans with no related allowance recorded, unpaid principal balance	11,752	14,985
Impaired loans with an allowance recorded, recorded investment	2,784	1,790
Impaired loans with an allowance recorded, unpaid principal balance	2,787	1,792
Impaired loans with an allowance recorded, related allowance	214	171
Residential Portfolio Segment [Member]
Impaired loans with no related allowance recorded, recorded investment	206	208
Impaired loans with no related allowance recorded, unpaid principal balance	237	239
Consumer Portfolio Segment [Member]
Impaired loans with no related allowance recorded, recorded investment	354	360
Impaired loans with no related allowance recorded, unpaid principal balance	$ 461	$ 466

Note 4 - Loans and Allowance 41

Note 4 - Loans and Allowance for Loan Losses - Impaired Loans, Supplemental Schedule (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Average Recorded Investment	$ 25,216	$ 27,083
Recognized Interest Income	397	366
Commercial Portfolio Segment [Member]
Average Recorded Investment	10,897	11,292
Recognized Interest Income	175	118
Commercial Real Estate Portfolio Segment [Member]
Average Recorded Investment	13,755	14,500
Recognized Interest Income	215	237
Construction Portfolio Segment [Member]
Average Recorded Investment	0	0
Recognized Interest Income	0	0
Residential Portfolio Segment [Member]
Average Recorded Investment	207	748
Recognized Interest Income	4	4
Consumer Portfolio Segment [Member]
Average Recorded Investment	357	543
Recognized Interest Income	$ 3	$ 7

Note 4 - Loans and Allowance 42

Note 4 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Number of Contracts	17	18
Pre-Modification Carrying Value	$ 12,171	$ 14,162
Financing Receivable, Modifications, Recorded Investment	9,550	12,081
Period-End Individual Impairment Allowance	$ 39	$ 43
Commercial Portfolio Segment [Member]
Number of Contracts	7	7
Pre-Modification Carrying Value	$ 2,393	$ 2,393
Financing Receivable, Modifications, Recorded Investment	1,043	1,085
Period-End Individual Impairment Allowance	$ 39	$ 43
Commercial Real Estate Portfolio Segment [Member]
Number of Contracts	9	10
Pre-Modification Carrying Value	$ 9,537	$ 11,528
Financing Receivable, Modifications, Recorded Investment	8,301	10,788
Period-End Individual Impairment Allowance	$ 0	$ 0
Residential Portfolio Segment [Member]
Number of Contracts	1	1
Pre-Modification Carrying Value	$ 241	$ 241
Financing Receivable, Modifications, Recorded Investment	206	208
Period-End Individual Impairment Allowance	$ 0	$ 0

Note 5 - Concentration of Cre43

Note 5 - Concentration of Credit Risk (Details Textual) $ in Thousands	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Unsecured Loan Limit, Percentage of Shareholders' Equity, California Financial Code	15.00%
Secured and Unsecured Loan Limit Percentage, California Financial Code	25.00%
Concentration Risk, Issuer Relationships	72
Loan Commitments and Standby Letters of Credit Related to Real Estate Loans	$ 48,623	$ 53,874
Concentration Risk, Aggregate Securities Amount	$ 5,000
Commercial Real Estate Loans [Member]
Loan To Value Ratio Requirement	75.00%
Residential Real Estate Loans [Member]
Loan To Value Ratio Requirement	80.00%
Aggregate Loans [Member] | Customer Concentration Risk [Member]
Concentration Risk, Issuer Relationships	36
Concentration Risk, Aggregate Loans Amount	$ 5,000

Note 6 - Other Assets (Details

Note 6 - Other Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
FRB Membership, Stock Subscription, Percent of Paid-Up Capital Stock and Surplus Requirement	6.00%
LIHTC Investments	$ 9,519	$ 10,119
Qualified Affordable Housing Project Investments, Commitment	2,299	$ 2,299
Contingent Commitment, Year 4 [Member]
Qualified Affordable Housing Project Investments, Commitment	722
Contingent Commitment, Year 7 [Member]
Qualified Affordable Housing Project Investments, Commitment	131
Contingent Commitment, Year 8 [Member]
Qualified Affordable Housing Project Investments, Commitment	90
Contingent Commitment, Year 9 or Thereafter [Member]
Qualified Affordable Housing Project Investments, Commitment	$ 1,356

Note 6 - Other Assets - Summary

Note 6 - Other Assets - Summary of Other Assets (Details) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Federal Reserve Bank stock	[1]	$ 14,069	$ 14,069
Other investments		158	158
Total equity securities without readily determinable fair values		14,227	14,227
Life insurance cash surrender value		54,742	54,101
Net deferred tax asset		42,842	33,112
Limited partnership investments		9,519	10,119
Interest receivable		22,538	23,557
Prepaid assets		4,532	4,906
Other assets		11,386	18,428
Total other assets		$ 159,786	$ 158,450
[1]	A bank applying for membership in the Federal Reserve System is required to subscribe to stock in the Federal Reserve Bank (FRB) in its district in a sum equal to six percent of the bank's paid-up capital stock and surplus. One-half of the amount of the bank's subscription shall be paid to the FRB and the remaining half will be subject to call when deemed necessary by the Board of Governors of the Federal Reserve System.

Note 6 - Other Assets - Amounts

Note 6 - Other Assets - Amounts Recognized in Net Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investment loss included in pre-tax income	$ 600	$ 450
Tax credits recognized in provision for income taxes	$ 336	$ 463

Note 7 - Goodwill and Identif47

Note 7 - Goodwill and Identifiable Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Goodwill and Intangible Asset Impairment, Total	$ 0		$ 0
Amortization Expense, Adjustment Resulting from a Change in Estimates of Useful Lives or Residual Values	$ 0	$ 0

Note 7 - Goodwill and Identif48

Note 7 - Goodwill and Identifiable Intangible Assets - Carrying Values of Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Goodwill	$ 121,673	$ 121,673

Note 7 - Goodwill and Identif49

Note 7 - Goodwill and Identifiable Intangible Assets - Gross Carrying Amount of Intangible Assets and Accumulated Amortization (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Gross Carrying Amount	$ 67,108	$ 67,108
Accumulated Amortization	(63,828)	(63,258)
Core Deposits [Member]
Gross Carrying Amount	56,808	56,808
Accumulated Amortization	(53,528)	(52,987)
Mechant Draft Processing [Member]
Gross Carrying Amount	10,300	10,300
Accumulated Amortization	$ (10,300)	$ (10,271)

Note 7 - Goodwill and Identif50

Note 7 - Goodwill and Identifiable Intangible Assets - Estimated Future Amortization Expense for Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
For the Three Months ended March 31, 2018 (actual)	$ 570	$ 800
Estimate for the remainder of year ending December 31, 2018	1,351
Estimate for year ending December 31, 2019	538
2,020	287
2,021	269
2,022	252
2,023	236
Core Deposits [Member]
For the Three Months ended March 31, 2018 (actual)	541
Estimate for the remainder of year ending December 31, 2018	1,351
Estimate for year ending December 31, 2019	538
2,020	287
2,021	269
2,022	252
2,023	236
Mechant Draft Processing [Member]
For the Three Months ended March 31, 2018 (actual)	29
Estimate for the remainder of year ending December 31, 2018
Estimate for year ending December 31, 2019
2,020
2,021
2,022
2,023

Note 8 - Deposits and Borrowe51

Note 8 - Deposits and Borrowed Funds (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Demand Deposit Overdrafts	$ 788		$ 2,786
Interest Expense, Time Deposits, $100,000 or More	$ 97	$ 106

Note 8 - Deposits and Borrowe52

Note 8 - Deposits and Borrowed Funds - Deposits Detail (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Noninterest-bearing deposits	$ 2,179,157	$ 2,197,526
Interest-bearing:
Transaction	924,081	904,245
Savings	1,540,192	1,494,024
Time deposits less than $100 thousand	114,301	117,848
Time deposits $100 thousand through $250 thousand	74,436	76,578
Time deposits more than $250 thousand	35,700	37,392
Total deposits	$ 4,867,867	$ 4,827,613

Note 8 - Deposits and Borrowe53

Note 8 - Deposits and Borrowed Funds - Short-term Borrowed Funds (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Collateral Carrying Value	$ 241,641	$ 237,537
Short-term borrowed funds	65,356	58,471
US Government-sponsored Enterprises Debt Securities [Member]
Collateral Carrying Value	73,165	74,173
Agency Residential MBS [Member]
Collateral Carrying Value	64,266	58,251
Corporate Debt Securities [Member]
Collateral Carrying Value	$ 104,210	$ 105,113

Note 9 - Fair Value Measureme54

Note 9 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Securities Selected for OTTI Analysis, Market Price, Threshold	95.00%
Loans and Leases Receivable, Allowance, Ending Balance	$ 23,081	$ 23,009
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Appraisal Rate	10.00%

Note 9 - Fair Value Measureme55

Note 9 - Fair Value Measurements - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Equity securities	$ 1,764	$ 1,800	$ 1,800
Debt securities available for sale	2,351,970		2,191,707
US Government-sponsored Enterprises Debt Securities [Member]
Debt securities available for sale	117,947		119,319
Agency Residential MBS [Member]
Debt securities available for sale	847,640		767,706
Non-agency Residential MBS [Member]
Debt securities available for sale	139		154
Agency Commercial MBS [Member]
Debt securities available for sale	2,190		2,219
US Government Agencies Debt Securities [Member]
Debt securities available for sale	1,520		1,590
US States and Political Subdivisions Debt Securities [Member]
Debt securities available for sale	180,635		185,221
Debt Security, Corporate, US [Member]
Debt securities available for sale	1,201,899		1,115,498
Fair Value, Measurements, Recurring [Member]
Equity securities	1,764		1,800
Debt securities available for sale	2,351,970		2,191,707
Total	2,353,734		2,193,507
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Equity securities
Debt securities available for sale
Total
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Equity securities	1,764		1,800
Debt securities available for sale	2,351,970		2,191,707
Total	2,353,734		2,193,507
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Equity securities
Debt securities available for sale
Total
Fair Value, Measurements, Recurring [Member] | Mutual Fund [Member]
Equity securities	1,764		1,800
Fair Value, Measurements, Recurring [Member] | Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Equity securities
Fair Value, Measurements, Recurring [Member] | Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equity securities	1,764		1,800
Fair Value, Measurements, Recurring [Member] | Mutual Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Equity securities
Fair Value, Measurements, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Debt securities available for sale	117,947		119,319
Fair Value, Measurements, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale	117,947		119,319
Fair Value, Measurements, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | Agency Residential MBS [Member]
Debt securities available for sale	847,640		767,706
Fair Value, Measurements, Recurring [Member] | Agency Residential MBS [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | Agency Residential MBS [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale	847,640		767,706
Fair Value, Measurements, Recurring [Member] | Agency Residential MBS [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | Non-agency Residential MBS [Member]
Debt securities available for sale	139		154
Fair Value, Measurements, Recurring [Member] | Non-agency Residential MBS [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | Non-agency Residential MBS [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale	139		154
Fair Value, Measurements, Recurring [Member] | Non-agency Residential MBS [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | Agency Commercial MBS [Member]
Debt securities available for sale	2,190		2,219
Fair Value, Measurements, Recurring [Member] | Agency Commercial MBS [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | Agency Commercial MBS [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale	2,190		2,219
Fair Value, Measurements, Recurring [Member] | Agency Commercial MBS [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member]
Debt securities available for sale	1,520		1,590
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale	1,520		1,590
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Debt securities available for sale	180,635		185,221
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale	180,635		185,221
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | Debt Security, Corporate, US [Member]
Debt securities available for sale	1,201,899		1,115,498
Fair Value, Measurements, Recurring [Member] | Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale
Fair Value, Measurements, Recurring [Member] | Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale	1,201,899		1,115,498
Fair Value, Measurements, Recurring [Member] | Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale

Note 9 - Fair Value Measureme56

Note 9 - Fair Value Measurements - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair Value		$ 12,280
Total Losses		(219)
Fair Value, Inputs, Level 1 [Member]
Fair Value
Fair Value, Inputs, Level 2 [Member]
Fair Value
Fair Value, Inputs, Level 3 [Member]
Fair Value		12,280
Fair Value, Measurements, Nonrecurring [Member]
Fair Value	$ 12,913
Total Losses
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value	12,913
Other Real Estate Owned [Member]
Fair Value		1,426
Total Losses		(219)
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value		1,426
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value	1,376
Total Losses
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value	1,376
Impaired Loans [Member] | Commercial Portfolio Segment [Member]
Fair Value		4,950
Total Losses
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value		5,904
Total Losses
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Portfolio Segment [Member]
Fair Value
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Portfolio Segment [Member]
Fair Value
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member]
Fair Value		4,950
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value		$ 5,904
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member]
Fair Value	4,857
Total Losses
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value	6,680
Total Losses
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Portfolio Segment [Member]
Fair Value
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Portfolio Segment [Member]
Fair Value
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member]
Fair Value	4,857
Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value	$ 6,680

Note 9 - Fair Value Measureme57

Note 9 - Fair Value Measurements - Fair Value Estimates for Financial Instruments, Excluding Financial Instruments Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt securities held to maturity	$ 1,098,895	$ 1,155,342
Reported Value Measurement [Member]
Cash and due from banks	555,607	575,002
Debt securities held to maturity	1,114,287	1,158,864
Loans	1,205,503	1,264,973
Deposits	4,867,867	4,827,613
Short-term borrowed funds	65,356	58,471
Estimate of Fair Value Measurement [Member]
Cash and due from banks	555,607	575,002
Debt securities held to maturity	1,098,895	1,155,342
Loans	1,244,670	1,257,811
Deposits	4,864,792	4,824,586
Short-term borrowed funds	65,356	58,471
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and due from banks	555,607	575,002
Debt securities held to maturity
Loans
Deposits
Short-term borrowed funds
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and due from banks
Debt securities held to maturity	1,098,895	1,155,342
Loans
Deposits	4,643,430	4,595,795
Short-term borrowed funds	65,356	58,471
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Cash and due from banks
Debt securities held to maturity
Loans	1,244,670	1,257,811
Deposits	221,362	228,791
Short-term borrowed funds

Note 10 - Commitments and Con58

Note 10 - Commitments and Contingent Liabilities (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Unfunded Loan Commitments	$ 282,428	$ 272,646
Other Liabilities [Member]
Reserve for Unfunded Commitments	2,308	2,308
Financial Standby Letter of Credit [Member]
Letters of Credit Outstanding, Amount	3,849	19,263
Commercial Standby Letters of Credit [Member]
Letters of Credit Outstanding, Amount	0	$ 0
Customer Refunds [Member]
Loss Contingency Accrual, Ending Balance	$ 5,542

Note 11 - Earnings Per Common59

Note 11 - Earnings Per Common Share (Details Textual) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	491	299

Note 11 - Earnings Per Common60

Note 11 - Earnings Per Common Share - Earnings Per Common Share and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income (numerator)	$ 17,506	$ 15,049
Basic earnings per common share
Weighted average number of common shares outstanding - basic (in shares)	26,532	26,171
Basic earnings per common share (in dollars per share)	$ 0.66	$ 0.58
Diluted earnings per common share
Weighted average number of common shares outstanding - basic (in shares)	26,532	26,171
Add common stock equivalents for options (in shares)	133	158
Weighted average number of common shares outstanding - diluted (denominator) (in shares)	26,665	26,329
Diluted earnings per common share (in dollars per share)	$ 0.66	$ 0.57