Westamerica Bancorporation (WABC) 10-Q 5 May 15 2015 Q1 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 27, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	WESTAMERICA BANCORPORATION
Document Type	10-Q
Current Fiscal Year End Date	-19
Entity Common Stock, Shares Outstanding		25,550,676
Amendment Flag	FALSE
Entity Central Index Key	311094
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1

Consolidated_Balance_Sheets_Un

Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Assets:
Cash and due from banks	$247,450	$380,836
Investment securities available for sale	1,777,320	1,600,781
Investment securities held to maturity, with fair values of: $1,030,865 at March 31, 2015 and $1,048,562 at December 31, 2014	1,015,231	1,038,658
Loans	1,683,884	1,700,290
Allowance for loan losses	-31,187	-31,485
Loans, net of allowance for loan losses	1,652,697	1,668,805
Other real estate owned	9,233	6,374
Premises and equipment, net	38,313	37,852
Identifiable intangibles, net	13,286	14,287
Goodwill	121,673	121,673
Other assets	160,574	166,458
Total Assets	5,035,777	5,035,724
Deposits:
Noninterest bearing deposits	1,902,904	1,910,781
Interest bearing deposits	2,477,172	2,438,410
Total deposits	4,380,076	4,349,191
Short-term borrowed funds	82,960	89,784
Federal Home Loan Bank advances		20,015
Other liabilities	45,361	50,131
Total Liabilities	4,508,397	4,509,121
Shareholders' Equity:
Common stock (no par value), authorized - 150,000 shares Issued and outstanding - 25,563 at March 31, 2015 and 25,745 at December 31, 2014	374,958	378,132
Deferred compensation	2,711	2,711
Accumulated other comprehensive income	9,600	5,292
Retained earnings	140,111	140,468
Total Shareholders' Equity	527,380	526,603
Total Liabilities and Shareholders' Equity	$5,035,777	$5,035,724

Consolidated_Balance_Sheets_Un1

Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Investment securities held to maturity, fair value (in Dollars)	$1,030,865	$1,048,562
Common stock, no par valuP5 (in Dollars per share)
Common stock, sharP5s authorizP5d	150,000	150,000
Common stock, sharP5s issuP5d	25,563	25,745
Common stock, sharP5s outstanding	25,563	25,745

Consolidated_Statements_of_Inc

Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Interest and Fee Income:
Loans	$20,230	$22,901
Investment securities available for sale	7,469	5,630
Investment securities held to maturity	6,218	7,033
Total Interest and Fee Income	33,917	35,564
Interest Expense:
Deposits	642	754
Short-term borrowed funds	16	20
Federal Home Loan Bank advances	1	99
Term repurchase agreement		25
Total Interest Expense	659	898
Net Interest Income	33,258	34,666
Provision for Loan Losses		1,000
Net Interest Income After Provision For Loan Losses	33,258	33,666
Noninterest Income:
Service charges on deposit accounts	5,707	6,010
Merchant processing services	1,703	1,924
Debit card fees	1,456	1,405
Trust fees	706	654
Other service fees	665	661
ATM processing fees	585	620
Financial services commissions	153	171
Other	1,325	1,545
Total Noninterest Income	12,300	12,990
Noninterest Expense:
Salaries and related benefits	13,338	14,126
Occupancy	3,727	3,727
Outsourced data processing services	2,108	2,105
Furniture and equipment	1,119	1,005
Amortization of identifiable intangibles	1,001	1,105
Professional fees	548	430
Courier service	543	610
Other real estate owned	315	-350
Other	4,028	4,115
Total Noninterest Expense	26,727	26,873
Income Before Income Taxes	18,831	19,783
Provision for income taxes	4,274	4,476
Net Income	$14,557	$15,307
Average Common Shares Outstanding (in Shares)	25,651	26,433
Diluted Average Common Shares Outstanding (in Shares)	25,655	26,537
Per Common Share Data:
Basic earnings (in Dollars per share)	$0.57	$0.58
Diluted earnings (in Dollars per share)	$0.57	$0.58
Dividends paid (in Dollars per share)	$0.38	$0.38

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net income	$14,557	$15,307
Other comprehensive income:
Increase in net unrealized gains on securities available for sale	7,418	7,823
Deferred tax expense	-3,119	-3,289
Increase in net unrealized gains on securities available for sale, net of tax	4,299	4,534
Post-retirement benefit transition obligation amortization	15	15
Deferred tax expense	-6	-6
Post-retirement benefit transition obligation amortization, net of tax	9	9
Total other comprehensive income	4,308	4,543
Total comprehensive income	$18,865	$19,850

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholdersb Equity (Unaudited) (USD $)	Common Stock [Member]	Accumulated Deferred Compensation [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
In Thousands
Balance at Dec. 31, 2013	$378,946	$2,711	$4,313	$156,964	$542,934
Balance (in Shares) at Dec. 31, 2013	26,510
Net income for the year				15,307	15,307
Other comprehensive income			4,543		4,543
Exercise of stock options	10,853				10,853
Exercise of stock options (in Shares)	225
Tax benefit decrease upon expiration/ exercise of stock options	-369				-369
Stock based compensation	359				359
Stock awarded to employees	52				52
Stock awarded to employees (in Shares)	1
Retirement of common stock including repurchases	-6,351			-16,359	-22,710
Retirement of common stock including repurchases (in Shares)	-437
Dividends				-10,086	-10,086
Balance at Mar. 31, 2014	383,490	2,711	8,856	145,826	540,883
Balance (in Shares) at Mar. 31, 2014	26,299
Balance at Dec. 31, 2014	378,132	2,711	5,292	140,468	526,603
Balance (in Shares) at Dec. 31, 2014	25,745
Net income for the year				14,557	14,557
Other comprehensive income			4,308		4,308
Tax benefit decrease upon expiration/ exercise of stock options	-865				-865
Stock based compensation	354				354
Stock awarded to employees	45				45
Stock awarded to employees (in Shares)	1
Retirement of common stock including repurchases	-2,708			-5,159	-7,867
Retirement of common stock including repurchases (in Shares)	-183
Dividends				-9,755	-9,755
Balance at Mar. 31, 2015	$374,958	$2,711	$9,600	$140,111	$527,380
Balance (in Shares) at Mar. 31, 2015	25,563

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Operating Activities:
Net income	$14,557		$15,307
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,930		4,103
Loan loss provision			1,000
Net amortization of deferred loan fees	-78		-30
Decrease in interest income receivable	812		643
Increase in deferred tax asset	-421		-756
Increase in other assets	-822		-185
Stock option compensation expense	354		359
Tax benefit decrease upon expiration/exercise of stock options	865		369
Increase in income taxes payable	4,695		5,232
Increase in interest expense payable	21		5
(Decrease) increase in other liabilities	-6,850		8,507
Gain on sale of other assets			-400
Writedown/loss on sale of premises and equipment	4		16
Net gain on sale of foreclosed assets			-493
Writedown of foreclosed assets	243		69
Net Cash Provided by Operating Activities	17,310		33,746
Investing Activities:
Net repayments of loans	13,805		9,598
Proceeds from FDIC1 loss-sharing agreement		[1]	44	[1]
Purchases of investment securities available for sale	-354,527		-237,948
Proceeds from sale/maturity/calls of securities available for sale	185,073		99,350
Purchases of investment securities held to maturity	-10,359		-17,993
Proceeds from maturity/calls of securities held to maturity	30,468		34,403
Purchases of premises and equipment	-1,326		-166
Proceeds from sale of FRB2/FHLB3 stock	490	[2],[3]	3,248	[2],[3]
Proceeds from sale of foreclosed assets	100		2,159
Net Cash Used in Investing Activities	-136,276		-107,305
Financing Activities:
Net change in deposits	30,891		51,063
Net change in short-term borrowings and FHLB3 advances	-26,824	[3]	1,620	[3]
Exercise of stock options/issuance of shares			10,853
Tax benefit decrease upon expiration/exercise of stock options	-865		-369
Retirement of common stock including repurchases	-7,867		-22,710
Common stock dividends paid	-9,755		-10,086
Net Cash (Used in) Provided by Financing Activities	-14,420		30,371
Net Change In Cash and Due from Banks	-133,386		-43,188
Cash and Due from Banks at Beginning of Period	380,836		472,028
Cash and Due from Banks at End of Period	247,450		428,840
Supplemental disclosure of noncash activities:
Loan collateral transferred to other real estate owned	3,202		968
Securities purchases pending settlement	1,478		-11,231
Supplemental disclosure of cash flow activities:
Interest paid for the period	$775		$987
[1]	Federal Deposit Insurance Corporation ("FDIC")
[2]	Federal Reserve Bank ("FRB")
[3]	Federal Home Loan Bank ("FHLB")

Note_1_Basis_of_Presentation

Note 1 - Basis of Presentation	3 Months Ended
	Mar. 31, 2015
Disclosure Text Block [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1: Basis of Presentation
	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 months ended March 31, 2015 and 2014 are not necessarily indicative of the results expected for the full year. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes as well as other information included in the Company's Annual Report on Form 10-K for the year ended December 31, 2014.

Note_2_Accounting_Policies

Note 2 - Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Note 2: Accounting Policies
	The most significant accounting policies followed by the Company are presented in Note 1 to the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. These policies, along with the disclosures presented in the other financial statement notes and in this discussion, provide information on how significant assets and liabilities are valued in the financial statements and how those values are determined. Based on the valuation techniques used and the sensitivity of financial statement amounts to the methods, assumptions, and estimates underlying those amounts, Management has identified the allowance for loan losses accounting to be the accounting area requiring the most subjective or complex judgments, and as such could be most subject to revision as new information becomes available. A discussion of the factors affecting accounting for the allowance for loan losses and purchased loans is included in the “Loan Portfolio Credit Risk” discussion below. Certain amounts in prior periods have been reclassified to conform to the current presentation.
	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 carried on the financial statements at fair value warrants an impairment writedown or valuation reserve to be established, or when an asset or liability needs to be recorded contingent upon a future event. Carrying assets and liabilities at fair value inherently results in more financial statement volatility. The fair values and the information used to record valuation adjustments for certain assets and liabilities are based either on quoted market prices or are provided by other third-party sources, when available.
	Recently Adopted Accounting Standards
	FASB ASU 2014-01, Investments- Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects, was issued January 2014 to permit reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). For those investments in qualified affordable housing projects not accounted for using the proportional amortization method, the investment should be accounted for as an equity method investment or a cost method investment in accordance with GAAP.  The policy election must be applied consistently to all qualified affordable housing project investments.
	The update also requires a reporting entity to disclose information regarding its investments in qualified affordable housing projects, and the effect of the measurement of its investments in qualified affordable housing projects and the related tax credits on its financial position and results of operations.
	The adoption of the update was limited to additional disclosures only and did not have a material effect on the Company’s financial statements at January 1, 2015, the date adopted.
	FASB ASU 2014-04, Receivables - Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralizes Consumer Mortgage Loans upon Foreclosure, was issued on January 17, 2014, providing clarification that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction.
	The adoption of the update was limited to additional disclosures only and did not have a material effect on the Company’s financial statements at January 1, 2015, the date adopted.
	Recently Issued Accounting Standards
	FASB ASU 2014-11, Transfers and Servicing (Topic 860): Repurchase-to-Maturity Trans­actions, Repurchase Financings, and Disclosures, was issued on June 12, 2014. The Update improves the financial reporting of repur­chase agreements and other similar transactions through a change in accounting for repurchase-to-ma­turity transactions and repurchase financings, and the introduction of two new disclosure requirements. New disclosures are required for (1) transfers accounted for as sales in transactions that are economically similar to repurchase agreements, in which the transferor retains substantially all of the exposure to the economic return on the trans­ferred financial asset throughout the term of the transaction and (2) repurchase agreements, secu­rities lending transactions, and repurchase-to-maturity transactions accounted for as secured borrow­ings about the nature of collateral pledged and the time to maturity of those transactions.
	The Company will be required to adhere to new disclosure requirements when the Update is adopted April 1, 2015 for the interim period ending June 30, 2015.

Note_3_Investment_Securities

Note 3 - Investment Securities	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Note 3:  Investment Securities
	An analysis of the amortized cost, gross unrealized gains and losses accumulated in other comprehensive income, and fair value of the available for sale investment securities portfolio follows:
		Investment Securities Available for Sale
		At March 31, 2015
		Amortized		Gross		Gross			Fair
		Cost		Unrealized		Unrealized			Value
				Gains		Losses
		(In thousands)
	U.S. Treasury securities	$	3,500	$	4	$	-		$	3,504
	Securities of U.S. Government sponsored entities		631,974		1,637		(3	)		633,608
	Residential mortgage-backed securities		22,625		1,682		(9	)		24,298
	Commercial mortgage-backed securities		2,826		5		(11	)		2,820
	Obligations of states and political subdivisions		165,063		10,756		(125	)		175,694
	Residential collateralized mortgage obligations		220,397		644		(5,142	)		215,899
	Asset-backed securities		3,015		-		(23	)		2,992
	FHLMC1 and FNMA2 stock		775		5,685		-			6,460
	Corporate securities		708,371		2,911		(2,025	)		709,257
	Other securities		2,039		867		(118	)		2,788
	Total	$	1,760,585	$	24,191	$	(7,456	)	$	1,777,320
	1 Federal Home Loan Mortgage Corporation
	2 Federal National Mortgage Association
	An analysis of the amortized cost, gross unrecognized gains and losses, and fair value of the held to maturity investment securities portfolio follows:
		Investment Securities Held to Maturity
		At March 31, 2015
		Amortized		Gross		Gross			Fair
		Cost		Unrecognized		Unrecognized			Value
				Gains		Losses
		(In thousands)
	Securities of U.S. government sponsored entities	$	995	$	12	$	-		$	1,007
	Residential mortgage-backed securities		57,259		1,319		(64	)		58,514
	Obligations of states and political subdivisions		712,374		13,478		(1,062	)		724,790
	Residential collateralized mortgage obligations		244,603		2,811		(860	)		246,554
	Total	$	1,015,231	$	17,620	$	(1,986	)	$	1,030,865
	An analysis of the amortized cost, gross unrealized gains and losses accumulated in other comprehensive income, and fair value of the available for sale investment securities portfolio follows:
		Investment Securities Available for Sale
		At December 31, 2014
		Amortized		Gross		Gross			Fair
		Cost		Unrealized		Unrealized			Value
				Gains		Losses
		(In thousands)
	U.S. Treasury securities	$	3,500	$	5	$	-		$	3,505
	Securities of U.S. Government sponsored entities		635,278		937		(1,027	)		635,188
	Residential mortgage-backed securities		24,647		1,776		(16	)		26,407
	Commercial mortgage-backed securities		2,923		6		(10	)		2,919
	Obligations of states and political subdivisions		171,907		10,015		(123	)		181,799
	Residential collateralized mortgage obligations		230,347		634		(8,524	)		222,457
	Asset-backed securities		8,349		-		(36	)		8,313
	FHLMC1 and FNMA2 stock		775		4,393		-			5,168
	Corporate securities		511,699		2,169		(1,629	)		512,239
	Other securities		2,039		871		(124	)		2,786
	Total	$	1,591,464	$	20,806	$	(11,489	)	$	1,600,781
	1 Federal Home Loan Mortgage Corporation
	2 Federal National Mortgage Association
	An analysis of the amortized cost, gross unrecognized gains and losses, and fair value of the held to maturity investment securities portfolio follows:
		Investment Securities Held to Maturity
		At December 31, 2014
		Amortized		Gross		Gross			Fair
		Cost		Unrecognized		Unrecognized			Value
				Gains		Losses
		(In thousands)
	Securities of U.S. government sponsored entities	$	1,066	$	11	$	-		$	1,077
	Residential mortgage-backed securities		59,078		1,183		(137	)		60,124
	Obligations of states and political subdivisions		720,189		11,350		(2,358	)		729,181
	Residential collateralized mortgage obligations		258,325		2,236		(2,381	)		258,180
Total	$	1,038,658	$	14,780	$	(4,876	)	$	1,048,562
The amortized cost and fair value of investment securities by contractual maturity are shown in the following tables at the dates indicated:
	At March 31, 2015
	Securities Available				Securities Held
	for Sale				to Maturity
	Amortized		Fair		Amortized			Fair
	Cost		Value		Cost			Value
	(In thousands)
Maturity in years:
1 year or less	$	80,420	$	80,658	$	15,322		$	15,829
Over 1 to 5 years		973,932		976,816		247,297			249,867
Over 5 to 10 years		409,874		416,005		270,191			275,665
Over 10 years		47,697		51,576		180,559			184,436
Subtotal		1,511,923		1,525,055		713,369			725,797
Mortgage-backed securities and residential collateralized mortgage obligations		245,848		243,017		301,862			305,068
Other securities		2,814		9,248		-			-
Total	$	1,760,585	$	1,777,320	$	1,015,231		$	1,030,865
Securities available for sale at March 31, 2015 with maturity dates over one year but less than five years include $351,761 thousand (fair value) of securities of U.S. Government sponsored entities with call options on dates within one year or less, of which $71,129 thousand have interest coupons which will increase if the issuer does not exercise the call option.
	At December 31, 2014
	Securities Available				Securities Held
	for Sale				to Maturity
	Amortized		Fair		Amortized			Fair
	Cost		Value		Cost			Value
	(In thousands)
Maturity in years:
1 year or less	$	57,891	$	57,991	$	15,355		$	15,855
Over 1 to 5 years		629,200		630,797		228,380			230,248
Over 5 to 10 years		584,872		589,250		285,219			288,631
Over 10 years		58,770		63,006		192,301			195,524
Subtotal		1,330,733		1,341,044		721,255			730,258
Mortgage-backed securities and residential collateralized mortgage obligations		257,917		251,783		317,403			318,304
Other securities		2,814		7,954		-			-
Total	$	1,591,464	$	1,600,781	$	1,038,658		$	1,048,562
Expected maturities of mortgage-backed 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 affect the yield on the carrying value of mortgage-backed securities. At March 31, 2015 and December 31, 2014, the Company had no high-risk collateralized mortgage obligations as defined by regulatory guidelines.
An analysis of the gross unrealized losses of the available for sale investment securities portfolio follows:
	Investment Securities Available for Sale
	At March 31, 2015
	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	$	9,997	$	(3	)		1	$	9,997	$	(3	)
Residential mortgage-backed securities		-		-		-			1		803		(9	)		1		803		(9	)
Commercial mortgage-backed securities		1		921		(6	)		1		751		(5	)		2		1,672		(11	)
Obligations of states and political subdivisions		5		2,380		(20	)		11		3,842		(105	)		16		6,222		(125	)
Residential collateralized mortgage obligations		-		-		-			29		184,632		(5,142	)		29		184,632		(5,142	)
Asset-backed securities		-		-		-			1		2,992		(23	)		1		2,992		(23	)
Corporate securities		59		232,085		(1,769	)		6		33,078		(256	)		65		265,163		(2,025	)
Other securities		-		-		-			1		1,882		(118	)		1		1,882		(118	)
Total		65	$	235,386	$	(1,795	)		51	$	237,977	$	(5,661	)		116	$	473,363	$	(7,456	)
An analysis of gross unrecognized losses of the held to maturity investment securities portfolio follows:
	Investment Securities Held to Maturity
	At March 31, 2015
	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)
Residential  mortgage-backed securities		2	$	14,483	$	(60	)		1	$	163	$	(4	)		3	$	14,646	$	(64	)
Obligations of states and political subdivisions		45		32,117		(177	)		83		70,639		(885	)		128		102,756		(1,062	)
Residential collateralized mortgage obligations		4		13,767		(134	)		16		83,929		(726	)		20		97,696		(860	)
Total		51	$	60,367	$	(371	)		100	$	154,731	$	(1,615	)		151	$	215,098	$	(1,986	)
The unrealized losses on the Company’s investment securities were caused by market conditions for these types of investments, particularly changes in risk-free interest rates. The Company evaluates securities on a quarterly basis including changes in security ratings issued by ratings agencies, changes in the financial condition of the issuer, and, for mortgage-related 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 intend to sell any investments and has concluded that it is more likely than not that it will not be required to sell the investments prior to recovery of the amortized cost basis. Therefore, the Company does not consider these investments to be other-than-temporarily impaired as of March 31, 2015.
The fair values of the investment 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 securities declines. As a result, other than temporary impairments may occur in the future.
As of March 31, 2015, $720,036 thousand of investment securities were pledged to secure public deposits and short-term borrowed funds. As of December 31, 2014, $757,623 thousand of investment securities were pledged to secure public deposits, short-term borrowed funds and FHLB advances.
An analysis of gross unrealized losses of investment securities available for sale follows:
	Investment Securities Available for Sale
	At December 31, 2014
	No. of		Less than 12 months					No. of		12 months or longer					No. of		Total
	Investment				Unrealized			Investment				Unrealized			Investment				Unrealized
	Positions		Fair Value		Losses			Positions		Fair Value		Losses			Positions		Fair Value		Losses
	($ in thousands)
Securities of U.S. Government sponsored entities		15	$	253,632	$	(989	)		1	$	9,963	$	(38	)		16	$	263,595	$	(1,027	)
Residential mortgage-backed securities		-		-		-			2		822		(16	)		2		822		(16	)
Commercial mortgage-backed securities		1		942		(7	)		1		803		(3	)		2		1,745		(10	)
Obligations of states and political subdivisions		7		2,548		(18	)		17		5,518		(105	)		24		8,066		(123	)
Residential collateralized mortgage obligations		-		-		-			32		205,074		(8,524	)		32		205,074		(8,524	)
Asset-backed securities		1		5,008		(7	)		1		3,305		(29	)		2		8,313		(36	)
Corporate securities		53		165,026		(1,304	)		5		34,222		(325	)		58		199,248		(1,629	)
Other securities		-		-		-			1		1,876		(124	)		1		1,876		(124	)
Total		77	$	427,156	$	(2,325	)		60	$	261,583	$	(9,164	)		137	$	688,739	$	(11,489	)
An analysis of gross unrecognized losses of investment securities held to maturity follows:
	Investment Securities Held to Maturity
	At December 31, 2014
	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)
Residential  mortgage-backed securities		4	$	19,467	$	(132	)		1	$	201	$	(5	)		5	$	19,668	$	(137	)
Obligations of states and political subdivisions		103		76,202		(439	)		138		123,370		(1,919	)		241		199,572		(2,358	)
Residential collateralized mortgage obligations		5		13,932		(166	)		22		119,513		(2,215	)		27		133,445		(2,381	)
Total		112	$	109,601	$	(737	)		161	$	243,084	$	(4,139	)		273	$	352,685	$	(4,876	)
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,
	2015		2014
	(In thousands)
Taxable	$	7,554	$	5,683
Tax-exempt		6,133		6,980
Total interest income from investment securities	$	13,687	$	12,663

Note_4_Loans_and_Allowance_for

Note 4 - Loans and Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2015
Loans And Allowance For Credit Losses [Abstract]
Loans And Allowance For Credit Losses [Text Block]	Note 4: Loans and Allowance for Credit Losses
	A summary of the major categories of loans outstanding is shown in the following tables.
		At March 31, 2015
		Commercial			Commercial			Construction			Residential			Consumer			Total
					Real Estate						Real Estate			Installment
														& Other
		(In thousands)
	Originated loans	$	391,863		$	548,936		$	12,438		$	140,334		$	371,975		$	1,465,546
	Purchased covered loans:
	Gross purchased covered loans		-			-			-			2,574			13,955			16,529
	Credit risk discount		-			-			-			(133	)		(67	)		(200	)
	Purchased non-covered loans:
	Gross purchased non-covered loans		17,367			152,167			1,021			1,206			38,953			210,714
	Credit risk discount		(1,255	)		(5,904	)		-			(262	)		(1,284	)		(8,705	)
	Total	$	407,975		$	695,199		$	13,459		$	143,719		$	423,532		$	1,683,884
		At December 31, 2014
		Commercial			Commercial			Construction			Residential			Consumer			Total
					Real Estate						Real Estate			Installment
														& Other
		(In thousands)
	Originated loans	$	374,005		$	567,594		$	11,003		$	146,925		$	370,842		$	1,470,369
	Purchased covered loans:
	Gross purchased covered loans		-			-			-			2,626			14,920			17,546
	Credit risk discount		-			-			-			(434	)		(34	)		(468	)
	Purchased non-covered loans:
	Gross purchased non-covered loans		19,166			157,502			2,919			972			41,656			222,215
	Credit risk discount		(1,356	)		(6,492	)		(50	)		(262	)		(1,212	)		(9,372	)
	Total	$	391,815		$	718,604		$	13,872		$	149,827		$	426,172		$	1,700,290
	Changes in the carrying amount of impaired purchased loans were as follows:
		For the			For the Year Ended
		Three Months Ended			31-Dec-14
		31-Mar-15
	Impaired purchased loans	(In thousands)
	Carrying amount at the beginning of the period	$	4,672		$	4,936
	Reductions during the period		(16	)		(264	)
	Carrying amount at the end of the period	$	4,656		$	4,672
	Changes in the accretable yield for purchased loans were as follows:
		For the			For the
		Three Months Ended			Year Ended
		31-Mar-15			31-Dec-14
	Accretable yield:	(In thousands)
	Balance at the beginning of the period	$	2,261		$	2,505
	Reclassification from nonaccretable difference		739			5,016
	Accretion		(973	)		(5,260	)
	Balance at the end of the period	$	2,027		$	2,261
	Accretion	$	(973	)	$	(5,260	)
	Change in FDIC indemnification		141			1,110
	(Increase) in interest income	$	(832	)	$	(4,150	)
	The following summarizes activity in the allowance for credit losses:
		Allowance for Loan Losses
		For the Three Months Ended March 31, 2015
		Commercial			Commercial			Construction			Residential			Consumer			Purchased			Purchased			Unallocated			Total
					Real Estate						Real Estate			Installment			Non-covered			Covered
														and Other			Loans			Loans
		(In thousands)
	Allowance for loan losses:
	Balance at beginning of period	$	5,460		$	4,245		$	644		$	2,241		$	7,717		$	2,120		$	-		$	9,058		$	31,485
	Additions:
	Provision		(110	)		(137	)		86			(101	)		(281	)		247			-			296			-
	Deductions:
	Chargeoffs		(60	)					-						(995	)		(35	)		-			-			(1,090	)
	Recoveries		180			15			-			-			590			7			-			-			792
	Net loan recoveries (losses)		120			15			-			-			(405	)		(28	)		-			-			(298	)
	Total allowance for loan losses	$	5,470		$	4,123		$	730		$	2,140		$	7,031		$	2,339		$	0		$	9,354		$	31,187
FDIC indemnification expired February 6, 2014 for County Bank non-single-family residential collateralized purchased loans; accordingly, such loans have been reclassified from purchased covered loans to purchased non-covered loans as well as the related allowance for credit losses.
	Allowance for Credit Losses
	For the Three Months Ended March 31, 2014
	Commercial			Commercial			Construction			Residential			Consumer			Purchased			Purchased			Unallocated			Total
				Real Estate						Real Estate			Installment			Non-covered			Covered
													and Other			Loans			Loans
	(In thousands)
Allowance for loan losses:
Balance at beginning of period	$	4,005		$	12,070		$	602		$	405		$	3,198		$	-		$	1,561		$	9,852		$	31,693
Additions:
Provision		130			(974	)		(160	)		86			214			1,272			-			432			1,000
Deductions:
Chargeoffs		(60	)		-			-			-			(999	)		(260	)		-			-			(1,319	)
Recoveries		168			163			3			-			400			1			-			-			735
Net loan recoveries (losses)		108			163			3			-			(599	)		(259	)		-			-			(584	)
Indemnification expiration		-			-			-			-			-			1,561			(1,561	)		-
Balance at end of period		4,243			11,259			445			491			2,813			2,574			-			10,284			32,109
Liability for off-balance sheet credit exposure		1,672			-			185			-			440			251			-			145			2,693
Total allowance for credit losses	$	5,915		$	11,259		$	630		$	491		$	3,253		$	2,825		$	-		$	10,429		$	34,802
The allowance for credit losses and recorded investment in loans were evaluated for impairment as follows:
	Allowance for Loan Losses and Recorded Investment in Loans Evaluated for Impairment
	At March 31, 2015
	Commercial			Commercial Real Estate			Construction			Residential Real Estate			Consumer Installment and Other			Purchased Non-covered Loans			Purchased Covered Loans			Unallocated			Total
	(In thousands)
Allowance for loan losses:
Individually evaluated for impairment	$	493		$	-		$	-		$	-		$	-		$	-		$	-		$	-		$	493
Collectively evaluated for impairment		4,977			4,123			730			2,140			7,031			2,339			-			9,354			30,694
Purchased loans with evidence of credit deterioration		-			-			-			-			-			-			-			-			-
Total	$	5,470		$	4,123		$	730		$	2,140		$	7,031		$	2,339		$	-		$	9,354		$	31,187
Carrying value of loans:
Individually evaluated for impairment	$	12,459		$	597		$	-		$	574		$	599		$	10,740		$	-		$	-		$	24,969
Collectively evaluated for impairment		379,404			548,339			12,438			139,760			371,376			186,835			16,107			-			1,654,259
Purchased loans with evidence of credit deterioration		-			-			-			-			-			4,434			222			-			4,656
Total	$	391,863		$	548,936		$	12,438		$	140,334		$	371,975		$	202,009		$	16,329		$	-		$	1,683,884
	Allowance for Credit Losses and Recorded Investment in Loans Evaluated for Impairment
	At December 31, 2014
	Commercial			Commercial Real Estate			Construction			Residential Real Estate			Consumer Installment and Other			Purchased Non-covered Loans			Purchased Covered Loans			Unallocated			Total
	(In thousands)
Allowance for credit losses:
Individually evaluated for impairment	$	496		$	-		$	-		$	-		$	-		$	-		$	-		$	-		$	496
Collectively evaluated for impairment		7,372			4,245			988			2,241			8,154			2,120			-			8,562			33,682
Purchased loans with evidence of credit deterioration		-			-			-			-			-			-			-			-			-
Total	$	7,868		$	4,245		$	988		$	2,241		$	8,154		$	2,120		$	-		$	8,562		$	34,178
Carrying value of loans:
Individually evaluated for impairment	$	11,811		$	2,970		$	-		$	574		$	599		$	12,364		$	-		$	-		$	28,318
Collectively evaluated for impairment		362,194			564,624			11,003			146,351			370,243			196,034			16,851			-			1,667,300
Purchased loans with evidence of credit deterioration		-			-			-			-			-			4,445			227			-			4,672
Total	$	374,005		$	567,594		$	11,003		$	146,925		$	370,842		$	212,843		$	17,078		$	-		$	1,700,290
The Bank’s customers are small businesses, professionals and consumers. Given the scale of these borrowers, corporate credit rating agencies do not evaluate the borrowers’ financial condition. The Bank maintains a Loan Review Department which reports directly to the Board of Directors. The Loan Review Department performs independent evaluations of loans and assigns credit risk grades to evaluated loans using grading standards employed by bank regulatory agencies. Loans judged to carry lower-risk attributes are assigned a “pass” grade, with a minimal likelihood of loss. Loans judged to carry higher-risk attributes are referred to as “classified loans,” and are further disaggregated, with increasing expectations for loss recognition, as “substandard,” “doubtful,” and “loss.” Loan Review Department evaluations occur every calendar quarter.  If the Bank becomes aware of deterioration in a borrower’s performance or financial condition between Loan Review Department examinations, assigned risk grades are re-evaluated promptly. Credit risk grades assigned by the Loan Review Department are subject to review by the Bank’s regulatory authorities during regulatory examinations.
The following summarizes the credit risk profile by internally assigned grade:
	Credit Risk Profile by Internally Assigned Grade
	At March 31, 2015
	Commercial			Commercial Real Estate			Construction			Residential Real Estate			Consumer Installment and Other			Purchased Non-covered Loans			Purchased Covered Loans (1)			Total
	(In thousands)
Grade:
Pass	$	384,159		$	509,428		$	12,438		$	137,992		$	370,845		$	172,947		$	14,938		$	1,602,747
Substandard		7,692			39,508			-			2,342			906			37,691			1,591			89,730
Doubtful		12			-			-			-			8			76			-			96
Loss		-			-			-			-			216			-			-			216
Credit risk discount		-			-			-			-			-			(8,705	)		(200	)		(8,905	)
Total	$	391,863		$	548,936		$	12,438		$	140,334		$	371,975		$	202,009		$	16,329		$	1,683,884
(1) 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, 2014
	Commercial			Commercial Real Estate			Construction			Residential Real Estate			Consumer Installment and Other			Purchased Non-covered Loans			Purchased Covered Loans (1)			Total
	(In thousands)
Grade:
Pass	$	366,487		$	527,980		$	11,003		$	144,902		$	369,618		$	182,644		$	15,509		$	1,618,143
Substandard		7,506			39,614			-			2,023			734			39,473			2,037			91,387
Doubtful		12			-			-			-			12			77			-			101
Loss		-			-			-			-			478			21			-			499
Credit risk discount		-			-			-			-			-			(9,372	)		(468	)		(9,840	)
Total	$	374,005		$	567,594		$	11,003		$	146,925		$	370,842		$	212,843		$	17,078		$	1,700,290
(1) 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, 2015
	Current and Accruing			30-59 Days Past Due and Accruing			60-89 Days Past Due and Accruing			Past Due 90 days or More and Accruing			Nonaccrual			Total Loans
	(In thousands)
Commercial	$	388,683		$	2,355		$	533		$	-		$	292		$	391,863
Commercial real estate		534,341			7,960			5,109			-			1,526			548,936
Construction		12,438			-			-			-			-			12,438
Residential real estate		136,975			1,976			479			-			904			140,334
Consumer installment and other		369,260			1,548			357			191			619			371,975
Total originated loans		1,441,697			13,839			6,478			191			3,341			1,465,546
Purchased non-covered loans		187,198			2,945			1,821			-			10,045			202,009
Purchased covered loans		16,208			121			-			-			-			16,329
Total	$	1,645,103		$	16,905		$	8,299		$	191		$	13,386		$	1,683,884
	Summary of Loans by Delinquency and Nonaccrual Status
	At December 31, 2014
	Current and Accruing			30-59 Days Past Due and Accruing			60-89 Days Past Due and Accruing			Past Due 90 days or More and Accruing			Nonaccrual			Total Loans
	(In thousands)
Commercial	$	372,235		$	1,704		$	36		$	-		$	30		$	374,005
Commercial real estate		557,041			6,500			-			-			4,053			567,594
Construction		11,003			-			-			-			-			11,003
Residential real estate		144,021			1,513			817			-			574			146,925
Consumer installment and other		365,753			3,310			625			502			652			370,842
Total originated loans		1,450,053			13,027			1,478			502			5,309			1,470,369
Purchased non-covered loans		196,150			4,204			491			-			11,998			212,843
Purchased covered loans		16,389			389			3			-			297			17,078
Total	$	1,662,592		$	17,620		$	1,972		$	502		$	17,604		$	1,700,290
The following is a summary of the effect of nonaccrual loans on interest income:
	For the Three Months Ended
	March 31,
	2015			2014
	(In thousands)
Interest income that would have been recognized had the loans performed in accordance with their original terms	$	311		$	260
Less: Interest income recognized on nonaccrual loans		(205	)		(44	)
Total reduction of interest income	$	106		$	216
There were no commitments to lend additional funds to borrowers whose loans were on nonaccrual status at March 31, 2015 and December 31, 2014.
The following summarizes impaired loans:
	Impaired Loans
	At March 31, 2015
	Recorded			Unpaid			Related
	Investment			Principal			Allowance
				Balance
	(In thousands)
Impaired loans with no related allowance recorded:
Commercial	$	2,651		$	2,715		$	-
Commercial real estate		17,159			23,100			-
Construction		-			-			-
Residential real estate		1,145			1,175			-
Consumer installment and other		990			1,097			-
Impaired loans with an allowance recorded:
Commercial		9,860			9,860			493
Commercial real estate		-			-			-
Construction		-			-			-
Residential real estate		-			-			-
Consumer installment and other		-			-			-
Total:
Commercial	$	12,511		$	12,575		$	493
Commercial real estate		17,159			23,100			-
Construction		-			-			-
Residential real estate		1,145			1,175			-
Consumer installment and other		990			1,097
	Impaired Loans
	At December 31, 2014
	Recorded			Unpaid			Related
	Investment			Principal			Allowance
				Balance
	(In thousands)
Impaired loans with no related allowance recorded:
Commercial	$	2,031		$	2,095		$	-
Commercial real estate		19,478			25,519			-
Construction		1,834			1,884			-
Residential real estate		574			574			-
Consumer installment and other		1,518			1,628			-
Impaired loans with an allowance recorded:
Commercial		9,910			9,910			496
Commercial real estate		-			-			-
Construction		-			-			-
Residential real estate		-			-			-
Consumer installment and other		-			-			-
Total:
Commercial	$	11,941		$	12,005		$	496
Commercial real estate		19,478			25,519			-
Construction		1,834			1,884			-
Residential real estate		574			574			-
Consumer installment and other		1,518			1,628
Impaired loans include troubled debt restructured loans. Impaired loans at March 31, 2015, included $6,537 thousand of restructured loans, including $998 thousand that were on nonaccrual status. Impaired loans at December 31, 2014, included $4,837 thousand of restructured loans, none of which were on nonaccrual status.
	Impaired Loans
	For the Three Months Ended March 31,
	2015						2014
	Average			Recognized			Average			Recognized
	Recorded			Interest			Recorded			Interest
	Investment			Income			Investment			Income
	(In thousands)
Commercial	$	12,226		$	146		$	4,842		$	67
Commercial real estate		18,318			257			19,298			117
Construction		917			-			2,259			-
Residential real estate		860			6			162			-
Consumer installment and other		1,254			6			1,716			8
Total	$	33,575		$	415		$	28,277		$	192
The following table provides information on troubled debt restructurings:
	Troubled Debt Restructurings
	At March 31, 2015
	Number of			Pre-Modification			Period-End			Period-End
	Contracts			Carrying Value			Carrying Value			Individual
										Impairment
										Allowance
	(In thousands)
Commercial		6		$	2,813		$	2,599		$	-
Commercial real estate		5			3,875			3,693			-
Residential real estate		1			18			5			-
Consumer installment and other		1			241			240			-
Total		13		$	6,947		$	6,537		$	-
	Troubled Debt Restructurings
	At March 31, 2014
	Number of			Pre-Modification			Period-End			Period-End
	Contracts			Carrying Value			Carrying Value			Individual
										Impairment
										Allowance
	(In thousands)
Commercial		3		$	3,201		$	2,938		$	262
Commercial real estate		2			2,291			2,316			-
Consumer installment and other		1			18			17			-
Total		6		$	5,510		$	5,271		$	262
During the three months ended March 31, 2015, the Company modified five loans with a carrying value of $1,736 thousand that were considered troubled debt restructurings. The concessions granted in the first quarter 2015 consisted of modification of payment terms to extend the maturity date to allow for deferred principal repayment and under-market terms. During the three months ended March 31, 2014, the Company modified one loan with a carrying value of $17 thousand that was considered a troubled debt restructuring. The concession granted in the first quarter 2014 consisted of modification of payment terms to extend the maturity date to allow for deferred principal repayment. During the three months ended March 31, 2015 and 2014, no troubled debt restructured loans defaulted. A troubled debt restructuring is considered to be in default when payments are ninety days or more past due.
At December 31, 2014, the Company pledged loans to secure borrowings with a carrying value of $20,015 thousand from the Federal Home Loan Bank (“FHLB”). The loans restricted due to collateral requirements approximated $18,366 thousand at December 31, 2014. The FHLB advances matured and were repaid in full in January 2015.
There were no loans held for sale at March 31, 2015 and December 31, 2014.
At March 31, 2015 and March 31, 2014, the Company held total other real estate owned (OREO) of $9,233 thousand and $12,186 thousand, respectively, of which $486 thousand and $967 thousand, respectively, were foreclosed residential real estate properties.  The amount of consumer mortgage loans outstanding secured by residential real estate properties for which formal foreclosure proceedings were in process totaled $599 thousand and $902 thousand at March 31, 2015 and March 31, 2014, respectively.

Note_5_Concentration_of_Credit

Note 5 - Concentration of Credit Risk	3 Months Ended
	Mar. 31, 2015
Risks and Uncertainties [Abstract]
Concentration Risk Disclosure [Text Block]	Note 5: Concentration of Credit Risk
	The Company’s business activity is with customers in Northern and Central California. The loan portfolio is well diversified within the Company’s geographic market, although the Company has significant credit arrangements that are secured by real estate collateral. In addition to real estate loans outstanding as disclosed in Note 4, the Company had loan commitments and standby letters of credit related to real estate loans of $68,724 thousand and $66,086 thousand at March 31, 2015 and December 31, 2014, respectively. The Company requires collateral on all real estate loans with loan-to-value ratios at origination generally no greater than 75% on commercial real estate loans and no greater than 80% on residential real estate loans. Under the California Financial Code, loans to any one person owing to a commercial bank at any one time shall not exceed the following limitations: (a) unsecured loans shall not exceed 15 percent of the sum of the shareholders' equity, allowance for loan losses, capital notes, and debentures of the bank, or (b) secured and unsecured loans in all shall not exceed 25 percent of the sum of the shareholders' equity, allowance for loan losses, capital notes, and debentures of the bank. At March 31, 2015, Westamerica Bank did not have loans to any one customer exceeding these limits; Westamerica Bank had 40 borrower relationships with aggregate loans exceeding $5 million.

Note_6_Other_Assets

Note 6 - Other Assets	3 Months Ended
	Mar. 31, 2015
Disclosure Text Block Supplement [Abstract]
Other Assets Disclosure [Text Block]	Note 6: Other Assets
	Other assets consisted of the following:
		At March 31,		At December 31,
		2015		2014
		(In thousands)
	Cost method equity investments:
	Federal Reserve Bank stock (1)	$	14,069	$	14,069
	Federal Home Loan Bank stock (2)		450		940
	Other investments		201		241
	Total cost method equity investments		14,720		15,250
	Life insurance cash surrender value		47,098		46,479
	Net deferred tax asset		47,138		50,903
	Limited partnership investments		17,445		18,673
	Interest receivable		18,582		19,394
	Prepaid assets		5,719		5,609
	Other assets		9,872		10,150
	Total other assets	$	160,574	$	166,458
	(1) A bank applying for membership in the Federal Reserve System is required to subscribe to stock in the Federal Reserve Bank of San Francisco (FRB) 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.
	(2) Borrowings from the FHLB must be supported by capital stock holdings. The minimum activity-based requirement is 4.7% of the outstanding advances. The requirement may be adjusted from time to time by the FHLB within limits established in the FHLB's Capital Plan.
	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, 2015, this investment totaled $17,445 thousand and $2,460 thousand of this amount represents outstanding equity capital commitments.  These commitments are expected to be paid as follows, $614 thousand in 2015, $763 thousand in 2016, and $1,083 thousand in 2017 or thereafter.
	The amounts recognized in net income for these investments include:
		For the Three Months Ended
		March 31,
		2015		2014
		(In thousands)
	Investment loss included in pre-tax income	$	675	$	700
	Tax credits recognized in  provision for income taxes		658		771

Note_7_Goodwill_and_Identifiab

Note 7 - Goodwill and Identifiable Intangible Assets	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	Note 7: Goodwill and Identifiable Intangible Assets
	The Company has recorded goodwill and other identifiable intangibles associated with purchase business combinations. Goodwill is not amortized, but is periodically evaluated for impairment. The Company did not recognize impairment during the three months ended March 31, 2015 and year ended December 31, 2014. Identifiable intangibles are amortized to their estimated residual values over their expected useful lives. Such lives and residual values are also periodically reassessed to determine if any amortization period adjustments are indicated. During the three months ended March 31, 2015 and year ended December 31, 2014, no such adjustments were recorded.
	The carrying values of goodwill were:
			At March 31,		At December 31,
			2015		2014
		(In thousands)
	Goodwill		$	121,673	$	121,673
	The gross carrying amount of identifiable intangible assets and accumulated amortization was:
			At March 31, 2015					At December 31, 2014
			Gross		Accumulated			Gross		Accumulated
			Carrying		Amortization			Carrying		Amortization
			Amount					Amount
			(In thousands)
	Core Deposit Intangibles		$	56,808	$	(44,116	)	$	56,808	$	(43,188	)
	Merchant Draft Processing Intangible			10,300		(9,706	)		10,300		(9,633	)
	Total Identifiable Intangible Assets		$	67,108	$	(53,822	)	$	67,108	$	(52,821	)
	As of March 31, 2015, the current year and estimated future amortization expense for identifiable intangible assets was:
			Core		Merchant			Total
			Deposit		Draft
			Intangibles		Processing
					Intangible
			(In thousands)
	Three months ended March 31, 2015 (actual)		$	928	$	73		$	1,001
	Estimate for year ended December 31, 2015			3,594		262			3,856
	2016			3,292		212			3,504
	2017			2,913		164			3,077
	2018			1,892		29			1,921
	2019			538		-			538
	2020			287		-			287

Note_8_Deposits_and_Borrowed_F

Note 8 - Deposits and Borrowed Funds	3 Months Ended
	Mar. 31, 2015
Deposits And Borrowed Funds [Abstract]
Deposits And Borrowed Funds [Text Block]	Note 8: Deposits and Borrowed Funds
	The following table provides additional detail regarding deposits.
		Deposits
		At March 31, 2015		At December 31, 2014
		(In thousands)
	Noninterest-bearing	$	1,902,904	$	1,910,781
	Interest-bearing:
	Transaction		787,633		792,448
	Savings		1,313,007		1,260,819
	Time deposits less than $100 thousand		165,412		169,959
	Time deposits $100 thousand through $250 thousand		109,909		113,023
	Time deposits more than $250 thousand		101,211		102,161
	Total deposits	$	4,380,076	$	4,349,191
	Demand deposit overdrafts of $3,073 thousand and $3,173 thousand were included as loan balances at March 31, 2015 and December 31, 2014, respectively. Interest expense for aggregate time deposits with individual account balances in excess of $100 thousand was $197 thousand in the first quarter 2015 and $232 thousand in the first quarter 2014.
	Short-term borrowed funds of $82,960 thousand and $89,784 thousand at March 31, 2015 and December 31, 2014, respectively, represent securities sold under agreements to repurchase the securities. As the Company is obligated to repurchase the securities, the transfer of the securities is accounted for as a secured borrowing rather than a sale. Securities sold under repurchase agreements are held in the custody of independent securities brokers. The carrying amount of the securities approximates $115,411 thousand and $148,014 thousand at March 31, 2015 and December 31, 2014, respectively. The short-term borrowed funds mature on an overnight basis.
	FHLB advances matured and were repaid in full in January 2015. At December 31, 2014, FHLB advances with a carrying value of $20,015 thousand were secured by residential real estate loans and securities of approximately $26,484 thousand.
	The Company has a $35,000 thousand unsecured line of credit which had no outstanding balance at March 31, 2015 and December 31, 2014. The line of credit has a variable interest rate, which was 2.0% per annum at March 31, 2015, with interest payable monthly on outstanding advances. Advances may be made up to the unused credit limit through March 18, 2016.

Note_9_Fair_Value_Measurements

Note 9 - Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Note 9:  Fair Value Measurements
	The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures.  Available for sale investment securities are recorded at fair value on a recurring basis.  Additionally, from time to time, the Company may be required to record at fair value other assets on a nonrecurring basis, such as other real estate owned, impaired loans, certain loans held for investment, investment securities held to maturity, and other assets.  These nonrecurring fair value adjustments typically involve the lower-of-cost-or-fair value accounting of individual assets.
	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 hierarchy, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. When the valuation assumptions used to measure the fair value of the asset or liability are categorized within different levels of the fair value hierarchy, the asset or liability is categorized in its entirety within the lowest level of the hierarchy. These levels are:
	Level 1 – Valuation is based upon quoted prices for identical instruments traded in active exchange markets, such as the New York Stock Exchange.  Level 1 includes U.S. Treasury, equity and federal agency securities, which are traded by dealers or brokers in active markets.  Valuations are obtained from readily available pricing sources for market transactions involving identical assets or liabilities.
	Level 2 – Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. Level 2 includes mortgage-backed securities, corporate securities, asset-backed securities, municipal bonds and residential collateralized mortgage obligations.
	Level 3 – Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect the Company’s estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques.
	The Company relies on independent vendor pricing services to measure fair value for investment securities available for sale and investment securities held to maturity. The Company employs three pricing services. To validate the pricing of these vendors, the Company compares vendors’ pricing for each of the securities for consistency; significant pricing differences, if any, are evaluated using all available independent quotes with the quote closely affecting the market is generally used as the fair value estimate. In addition, the Company conducts “other than temporary impairment (OTTI)” analysis on a quarterly basis; securities selected for OTTI analysis include all securities at a market price below 95 percent of par value and with a market to book ratio below 95:100. As with any valuation technique used to estimate fair value, changes in underlying assumptions used could significantly affect the results of current and future values. Accordingly, these fair value estimates may not be realized in an actual sale of the securities.
	When the Company changes its valuation assumptions for measuring financial assets and financial liabilities at fair value, either due to changes in current market conditions or other factors, it may need to transfer those assets or liabilities to another level in the hierarchy based on the new assumptions used. The Company recognizes these transfers at the end of the reporting period that the transfers occur. For the three months ended March 31, 2015 and year ended December 31, 2014, there were no transfers in or out of levels 1, 2 or 3.
	Assets Recorded at Fair Value on a Recurring Basis
	The table below presents assets measured at fair value on a recurring basis.
		At March 31, 2015
		Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
				(Level 1)		(Level 2 )		(Level 3 )
		(In thousands)
	U.S. Treasury securities	$	3,504	$	3,504	$	-	$	-
	Securities of U.S. Government sponsored entities		633,608		633,608		-		-
	Residential mortgage-backed securities		24,298		-		24,298		-
	Commercial mortgage-backed securities		2,820		-		2,820		-
	Obligations of states and political subdivisions		175,694		-		175,694		-
	Residential collateralized mortgage obligations		215,899		-		215,899		-
	Asset-backed securities		2,992		-		2,992		-
	FHLMC and FNMA stock		6,460		6,460		-		-
	Corporate securities		709,257		-		709,257		-
	Other securities		2,788		906		1,882		-
	Total securities available for sale	$	1,777,320	$	644,478	$	1,132,842	$	-
		At December 31, 2014
		Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
				(Level 1)		(Level 2 )		(Level 3 )
		(In thousands)
	U.S. Treasury securities	$	3,505	$	3,505	$	-	$	-
	Securities of U.S. Government sponsored entities		635,188		635,188		-		-
	Residential mortgage-backed securities		26,407		-		26,407		-
	Commercial mortgage-backed securities		2,919		-		2,919		-
	Obligations of states and political subdivisions		181,799		-		181,799		-
	Residential collateralized mortgage obligations		222,457		-		222,457		-
	Asset-backed securities		8,313		-		8,313		-
	FHLMC and FNMA stock		5,168		5,168		-		-
	Corporate securities		512,239		-		512,239		-
	Other securities		2,786		910		1,876		-
	Total securities available for sale	$	1,600,781	$	644,771	$	956,010	$	-
	Assets Recorded at Fair Value on a Nonrecurring Basis
	The Company may be required, from time to time, to measure certain assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from application of lower-of-cost or fair-value accounting of individual assets. For assets measured at fair value on a nonrecurring basis that were recorded in the balance sheet at March 31, 2015 and December 31, 2014, the following table provides the level of valuation assumptions used to determine each adjustment and the carrying value of the related assets at period end.
										For the Three
										Months Ended
		At March 31, 2015								31-Mar-15
		Fair Value		Level 1		Level 2		Level 3		Total Losses
		(In thousands)
	Other real estate owned	$	9,233	$	-	$	9,233	$	-	$	(243	)
	Impaired loans		16,120		-		6,753		9,367		-
	Total assets measured at fair value on a nonrecurring basis	$	25,353	$	-	$	15,986	$	9,367	$	(243	)
										For the
										Year Ended
		At December 31, 2014								31-Dec-14
		Fair Value		Level 1		Level 2		Level 3		Total Losses
		(In thousands)
	Other real estate owned	$	6,374	$	-	$	6,374	$	-	$	(358	)
	Impaired loans		17,085		-		7,670		9,415		(884	)
	Total assets measured at fair value on a nonrecurring basis	$	23,459	$	-	$	14,044	$	9,415	$	(1,242	)
	Level 2 – Valuation is based upon independent market prices or appraised value of the collateral, less 10% for selling costs, generally.  Level 2 includes other real estate owned that has been measured at fair value upon transfer to foreclosed assets and impaired loans collateralized by real property where a specific reserve has been established or a charge-off has been recorded. Losses on other real estate owned represent losses recognized in earnings during the period subsequent to its initial classification as foreclosed assets.
	Level 3 – Valuation is based upon estimated liquidation values of loan collateral.  The value of level 3 assets can also include a component of real estate, which is valued as described for level 2 inputs, when collateral for the impaired loan includes both business assets and real estate.  Level 3 includes impaired loans where a specific reserve has been established or a charge-off has been recorded.
	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 recorded at fair value in the balance sheet.
	Cash and Due from Banks  Cash and due from banks represent U.S. dollar denominated coin and currency, deposits at the Federal Reserve Bank and correspondent banks, and amounts being settled with other banks to complete the processing of  customers’ daily transactions. Collectively, the Federal Reserve Bank and financial institutions operate in a market in which cash and due from banks transactions are processed continuously in significant daily volumes honoring the face value of the U.S. dollar.
Investment Securities Held to Maturity  The fair values of investment securities were estimated using quoted prices as described above for Level 1 and Level 2 valuation.
Loans  Loans were separated into two groups for valuation. Variable rate loans, except for those described below, which reprice frequently with changes in market rates were valued using historical cost. Fixed rate loans and variable rate loans that have reached their minimum contractual interest rates were valued by discounting the future cash flows expected to be received from the loans using current interest rates charged on loans with similar characteristics. Additionally, the allowance for loan losses of $31,187 thousand at March 31, 2015 and $31,485 thousand at December 31, 2014 and the fair value discount due to credit default risk associated with purchased covered and purchased non-covered loans of $200 thousand and $8,705 thousand, respectively at March 31, 2015 and purchased covered and purchased non-covered loans of $468 thousand and $9,372 thousand, respectively at December 31, 2014 were applied against the estimated fair values to recognize estimated future defaults of contractual cash flows. The Company does not consider these values to be a liquidation price for the loans.
Deposit Liabilities  Deposits with no stated maturity such as checking accounts, savings accounts and money market accounts can be readily converted to cash or used to settle transactions at face value through the broad financial system operated by the Federal Reserve Bank and financial institutions. The fair value of deposits with no stated maturity is equal to the amount payable on demand. The fair values of time deposits were estimated by discounting estimated future contractual cash flows using current market rates for financial instruments with similar characteristics.
Short-Term Borrowed Funds  The carrying amount of securities sold under agreement to repurchase and other short-term borrowed funds approximate fair value due to the relatively short period of time between their origination and their expected realization.
Federal Home Loan Bank Advances  The fair values of FHLB advances were estimated by using redemption amounts quoted by the Federal Home Loan Bank of San Francisco.
The table below is 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 necessarily represent amounts which ultimately may be realized for assets or paid to settle liabilities. In addition, these values do not give effect to adjustments to fair value which may occur when financial instruments are sold or settled in larger quantities.  The carrying amounts in the following table are recorded in the balance sheet under the indicated captions.
The Company has not included assets and liabilities that are not financial instruments, such as goodwill, long-term relationships with deposit, merchant processing and trust customers, other purchased intangibles, premises and equipment, deferred taxes and other assets and liabilities. The total estimated fair values do not represent, and should not be construed to represent, the underlying value of the Company.
	At March 31, 2015
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
					(Level 1)		(Level 2 )		(Level 3 )
Financial Assets:	(In thousands)
Cash and due from banks	$	247,450	$	247,450	$	247,450	$	-	$	-
Investment securities held to maturity		1,015,231		1,030,865		1,007		1,029,858		-
Loans		1,652,697		1,665,928		-		-		1,665,928
Financial Liabilities:
Deposits	$	4,380,076	$	4,379,658	$	-	$	4,003,544	$	376,114
Short-term borrowed funds		82,960		82,960		-		82,960		-
	At December 31, 2014
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
					(Level 1)		(Level 2 )		(Level 3 )
Financial Assets:	(In thousands)
Cash and due from banks	$	380,836	$	380,836	$	380,836	$	-	$	-
Investment securities held to maturity		1,038,658		1,048,562		1,077		1,047,485		-
Loans		1,668,805		1,685,048		-		-		1,685,048
Financial Liabilities:
Deposits	$	4,349,191	$	4,348,958	$	-	$	3,964,048	$	384,910
Short-term borrowed funds		89,784		89,784		-		89,784		-
Federal Home Loan Bank advances		20,015		20,014		20,014		-		-
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 premium or discount was ascribed to these commitments because virtually all funding would be at current market rates.

Note_10_Commitments_and_Contin

Note 10 - Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Note 10: Commitments and Contingent Liabilities
	Loan commitments are agreements to lend to a customer provided there is no violation of any condition established in the agreement. Commitments generally have fixed expiration dates or other termination clauses. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future funding requirements. Loan commitments are subject to the Company’s normal credit policies and collateral requirements. Unfunded loan commitments were $320,290 thousand and $312,694 thousand at March 31, 2015 and December 31, 2014, respectively. Standby letters of credit commit the Company to make payments on behalf of customers when certain specified future events occur. Standby letters of credit are primarily issued to support customers’ short-term financing requirements and must meet the Company’s normal credit policies and collateral requirements. Financial and performance standby letters of credit outstanding totaled $27,490 thousand and $29,002 thousand at March 31, 2015 and December 31, 2014, respectively. The Company also had commitments for commercial and similar letters of credit of $40 thousand at March 31, 2015 and December 31, 2014. At March 31, 2015 and December 31, 2014, the Company had a reserve for unfunded commitments of $2,693 thousand included in other liabilities.
	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 expect such cases will have a material, adverse effect on its financial position or results of operations. Legal liabilities are accrued when obligations become probable and the amount is reasonably estimable.

Note_11_Earnings_Per_Common_Sh

Note 11 - Earnings Per Common Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Note 11: Earnings Per Common Share
	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,
		2015		2014
		(In thousands, except per share data)
	Net income (numerator)	$	14,557	$	15,307
	Basic earnings per common share
	Weighted average number of common shares outstanding - basic (denominator)		25,651		26,433
	Basic earnings per common share	$	0.57	$	0.58
	Diluted earnings per common share
	Weighted average number of common shares outstanding - basic		25,651		26,433
	Add common stock equivalents for options		4		104
	Weighted average number of common shares outstanding - diluted (denominator)		25,655		26,537
	Diluted earnings per common share	$	0.57	$	0.58
	For the three months ended March 31, 2015 and 2014, options to purchase 1,775 thousand and 809 thousand shares of common stock, respectively, were outstanding but not included in the computation of diluted net income per share because the option exercise price exceeded the fair value of the stock such that their inclusion would have had an anti-dilutive effect.

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Standards
	FASB ASU 2014-01, Investments- Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects, was issued January 2014 to permit reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). For those investments in qualified affordable housing projects not accounted for using the proportional amortization method, the investment should be accounted for as an equity method investment or a cost method investment in accordance with GAAP.  The policy election must be applied consistently to all qualified affordable housing project investments.
	The update also requires a reporting entity to disclose information regarding its investments in qualified affordable housing projects, and the effect of the measurement of its investments in qualified affordable housing projects and the related tax credits on its financial position and results of operations.
	The adoption of the update was limited to additional disclosures only and did not have a material effect on the Company’s financial statements at January 1, 2015, the date adopted.
	FASB ASU 2014-04, Receivables - Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralizes Consumer Mortgage Loans upon Foreclosure, was issued on January 17, 2014, providing clarification that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction.
	The adoption of the update was limited to additional disclosures only and did not have a material effect on the Company’s financial statements at January 1, 2015, the date adopted.
	Recently Issued Accounting Standards
	FASB ASU 2014-11, Transfers and Servicing (Topic 860): Repurchase-to-Maturity Trans­actions, Repurchase Financings, and Disclosures, was issued on June 12, 2014. The Update improves the financial reporting of repur­chase agreements and other similar transactions through a change in accounting for repurchase-to-ma­turity transactions and repurchase financings, and the introduction of two new disclosure requirements. New disclosures are required for (1) transfers accounted for as sales in transactions that are economically similar to repurchase agreements, in which the transferor retains substantially all of the exposure to the economic return on the trans­ferred financial asset throughout the term of the transaction and (2) repurchase agreements, secu­rities lending transactions, and repurchase-to-maturity transactions accounted for as secured borrow­ings about the nature of collateral pledged and the time to maturity of those transactions.
	The Company will be required to adhere to new disclosure requirements when the Update is adopted April 1, 2015 for the interim period ending June 30, 2015.

Note_3_Investment_Securities_T

Note 3 - Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]		Investment Securities Available for Sale
		At March 31, 2015
		Amortized		Gross		Gross			Fair
		Cost		Unrealized		Unrealized			Value
				Gains		Losses
		(In thousands)
	U.S. Treasury securities	$	3,500	$	4	$	-		$	3,504
	Securities of U.S. Government sponsored entities		631,974		1,637		(3	)		633,608
	Residential mortgage-backed securities		22,625		1,682		(9	)		24,298
	Commercial mortgage-backed securities		2,826		5		(11	)		2,820
	Obligations of states and political subdivisions		165,063		10,756		(125	)		175,694
	Residential collateralized mortgage obligations		220,397		644		(5,142	)		215,899
	Asset-backed securities		3,015		-		(23	)		2,992
	FHLMC1 and FNMA2 stock		775		5,685		-			6,460
	Corporate securities		708,371		2,911		(2,025	)		709,257
	Other securities		2,039		867		(118	)		2,788
	Total	$	1,760,585	$	24,191	$	(7,456	)	$	1,777,320
		Investment Securities Available for Sale
		At December 31, 2014
		Amortized		Gross		Gross			Fair
		Cost		Unrealized		Unrealized			Value
				Gains		Losses
		(In thousands)
	U.S. Treasury securities	$	3,500	$	5	$	-		$	3,505
	Securities of U.S. Government sponsored entities		635,278		937		(1,027	)		635,188
	Residential mortgage-backed securities		24,647		1,776		(16	)		26,407
	Commercial mortgage-backed securities		2,923		6		(10	)		2,919
	Obligations of states and political subdivisions		171,907		10,015		(123	)		181,799
	Residential collateralized mortgage obligations		230,347		634		(8,524	)		222,457
	Asset-backed securities		8,349		-		(36	)		8,313
	FHLMC1 and FNMA2 stock		775		4,393		-			5,168
	Corporate securities		511,699		2,169		(1,629	)		512,239
	Other securities		2,039		871		(124	)		2,786
	Total	$	1,591,464	$	20,806	$	(11,489	)	$	1,600,781
Schedule of Held to Maturity Securities Reconciliation [Table Text Block]		Investment Securities Held to Maturity
		At March 31, 2015
		Amortized		Gross		Gross			Fair
		Cost		Unrecognized		Unrecognized			Value
				Gains		Losses
		(In thousands)
	Securities of U.S. government sponsored entities	$	995	$	12	$	-		$	1,007
	Residential mortgage-backed securities		57,259		1,319		(64	)		58,514
	Obligations of states and political subdivisions		712,374		13,478		(1,062	)		724,790
	Residential collateralized mortgage obligations		244,603		2,811		(860	)		246,554
	Total	$	1,015,231	$	17,620	$	(1,986	)	$	1,030,865
		Investment Securities Held to Maturity
		At December 31, 2014
		Amortized		Gross		Gross			Fair
		Cost		Unrecognized		Unrecognized			Value
				Gains		Losses
		(In thousands)
	Securities of U.S. government sponsored entities	$	1,066	$	11	$	-		$	1,077
	Residential mortgage-backed securities		59,078		1,183		(137	)		60,124
	Obligations of states and political subdivisions		720,189		11,350		(2,358	)		729,181
	Residential collateralized mortgage obligations		258,325		2,236		(2,381	)		258,180
	Total	$	1,038,658	$	14,780	$	(4,876	)	$	1,048,562
Investments Classified by Contractual Maturity Date [Table Text Block]		At March 31, 2015
		Securities Available				Securities Held
		for Sale				to Maturity
		Amortized		Fair		Amortized			Fair
		Cost		Value		Cost			Value
		(In thousands)
	Maturity in years:
	1 year or less	$	80,420	$	80,658	$	15,322		$	15,829
	Over 1 to 5 years		973,932		976,816		247,297			249,867
	Over 5 to 10 years		409,874		416,005		270,191			275,665
	Over 10 years		47,697		51,576		180,559			184,436
	Subtotal		1,511,923		1,525,055		713,369			725,797
	Mortgage-backed securities and residential collateralized mortgage obligations		245,848		243,017		301,862			305,068
	Other securities		2,814		9,248		-			-
	Total	$	1,760,585	$	1,777,320	$	1,015,231		$	1,030,865
		At December 31, 2014
		Securities Available				Securities Held
		for Sale				to Maturity
		Amortized		Fair		Amortized			Fair
		Cost		Value		Cost			Value
		(In thousands)
	Maturity in years:
	1 year or less	$	57,891	$	57,991	$	15,355		$	15,855
	Over 1 to 5 years		629,200		630,797		228,380			230,248
	Over 5 to 10 years		584,872		589,250		285,219			288,631
	Over 10 years		58,770		63,006		192,301			195,524
	Subtotal		1,330,733		1,341,044		721,255			730,258
	Mortgage-backed securities and residential collateralized mortgage obligations		257,917		251,783		317,403			318,304
	Other securities		2,814		7,954		-			-
	Total	$	1,591,464	$	1,600,781	$	1,038,658		$	1,048,562
Schedule of Unrealized Loss on Investments [Table Text Block]		Investment Securities Available for Sale
		At March 31, 2015
		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	$	9,997	$	(3	)		1	$	9,997	$	(3	)
	Residential mortgage-backed securities		-		-		-			1		803		(9	)		1		803		(9	)
	Commercial mortgage-backed securities		1		921		(6	)		1		751		(5	)		2		1,672		(11	)
	Obligations of states and political subdivisions		5		2,380		(20	)		11		3,842		(105	)		16		6,222		(125	)
	Residential collateralized mortgage obligations		-		-		-			29		184,632		(5,142	)		29		184,632		(5,142	)
	Asset-backed securities		-		-		-			1		2,992		(23	)		1		2,992		(23	)
	Corporate securities		59		232,085		(1,769	)		6		33,078		(256	)		65		265,163		(2,025	)
	Other securities		-		-		-			1		1,882		(118	)		1		1,882		(118	)
	Total		65	$	235,386	$	(1,795	)		51	$	237,977	$	(5,661	)		116	$	473,363	$	(7,456	)
		Investment Securities Held to Maturity
		At March 31, 2015
		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)
	Residential  mortgage-backed securities		2	$	14,483	$	(60	)		1	$	163	$	(4	)		3	$	14,646	$	(64	)
	Obligations of states and political subdivisions		45		32,117		(177	)		83		70,639		(885	)		128		102,756		(1,062	)
	Residential collateralized mortgage obligations		4		13,767		(134	)		16		83,929		(726	)		20		97,696		(860	)
	Total		51	$	60,367	$	(371	)		100	$	154,731	$	(1,615	)		151	$	215,098	$	(1,986	)
		Investment Securities Available for Sale
		At December 31, 2014
		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		15	$	253,632	$	(989	)		1	$	9,963	$	(38	)		16	$	263,595	$	(1,027	)
	Residential mortgage-backed securities		-		-		-			2		822		(16	)		2		822		(16	)
	Commercial mortgage-backed securities		1		942		(7	)		1		803		(3	)		2		1,745		(10	)
	Obligations of states and political subdivisions		7		2,548		(18	)		17		5,518		(105	)		24		8,066		(123	)
	Residential collateralized mortgage obligations		-		-		-			32		205,074		(8,524	)		32		205,074		(8,524	)
	Asset-backed securities		1		5,008		(7	)		1		3,305		(29	)		2		8,313		(36	)
	Corporate securities		53		165,026		(1,304	)		5		34,222		(325	)		58		199,248		(1,629	)
	Other securities		-		-		-			1		1,876		(124	)		1		1,876		(124	)
	Total		77	$	427,156	$	(2,325	)		60	$	261,583	$	(9,164	)		137	$	688,739	$	(11,489	)
		Investment Securities Held to Maturity
		At December 31, 2014
		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)
	Residential  mortgage-backed securities		4	$	19,467	$	(132	)		1	$	201	$	(5	)		5	$	19,668	$	(137	)
	Obligations of states and political subdivisions		103		76,202		(439	)		138		123,370		(1,919	)		241		199,572		(2,358	)
	Residential collateralized mortgage obligations		5		13,932		(166	)		22		119,513		(2,215	)		27		133,445		(2,381	)
	Total		112	$	109,601	$	(737	)		161	$	243,084	$	(4,139	)		273	$	352,685	$	(4,876	)
Interest Income from Investments [Table Text Block]		For the Three Months
		Ended March 31,
		2015		2014
		(In thousands)
	Taxable	$	7,554	$	5,683
	Tax-exempt		6,133		6,980
	Total interest income from investment securities	$	13,687	$	12,663

Note_4_Loans_and_Allowance_for1

Note 4 - Loans and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2015
Loans And Allowance For Credit Losses [Abstract]
Schedule of Loans Receivable [Table Text Block]		At March 31, 2015
		Commercial			Commercial			Construction			Residential			Consumer			Total
					Real Estate						Real Estate			Installment
														& Other
		(In thousands)
	Originated loans	$	391,863		$	548,936		$	12,438		$	140,334		$	371,975		$	1,465,546
	Purchased covered loans:
	Gross purchased covered loans		-			-			-			2,574			13,955			16,529
	Credit risk discount		-			-			-			(133	)		(67	)		(200	)
	Purchased non-covered loans:
	Gross purchased non-covered loans		17,367			152,167			1,021			1,206			38,953			210,714
	Credit risk discount		(1,255	)		(5,904	)		-			(262	)		(1,284	)		(8,705	)
	Total	$	407,975		$	695,199		$	13,459		$	143,719		$	423,532		$	1,683,884
		At December 31, 2014
		Commercial			Commercial			Construction			Residential			Consumer			Total
					Real Estate						Real Estate			Installment
														& Other
		(In thousands)
	Originated loans	$	374,005		$	567,594		$	11,003		$	146,925		$	370,842		$	1,470,369
	Purchased covered loans:
	Gross purchased covered loans		-			-			-			2,626			14,920			17,546
	Credit risk discount		-			-			-			(434	)		(34	)		(468	)
	Purchased non-covered loans:
	Gross purchased non-covered loans		19,166			157,502			2,919			972			41,656			222,215
	Credit risk discount		(1,356	)		(6,492	)		(50	)		(262	)		(1,212	)		(9,372	)
	Total	$	391,815		$	718,604		$	13,872		$	149,827		$	426,172		$	1,700,290
Impaired Purchased Loans Roll Forward [Table Text Block]		For the			For the Year Ended
		Three Months Ended			31-Dec-14
		31-Mar-15
	Impaired purchased loans	(In thousands)
	Carrying amount at the beginning of the period	$	4,672		$	4,936
	Reductions during the period		(16	)		(264	)
	Carrying amount at the end of the period	$	4,656		$	4,672
Accretable Yield Reconciliation Schedule [Table Text Block]		For the			For the
		Three Months Ended			Year Ended
		31-Mar-15			31-Dec-14
	Accretable yield:	(In thousands)
	Balance at the beginning of the period	$	2,261		$	2,505
	Reclassification from nonaccretable difference		739			5,016
	Accretion		(973	)		(5,260	)
	Balance at the end of the period	$	2,027		$	2,261
	Accretion	$	(973	)	$	(5,260	)
	Change in FDIC indemnification		141			1,110
	(Increase) in interest income	$	(832	)	$	(4,150	)
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, 2015
		Commercial			Commercial			Construction			Residential			Consumer			Purchased			Purchased			Unallocated			Total
					Real Estate						Real Estate			Installment			Non-covered			Covered
														and Other			Loans			Loans
		(In thousands)
	Allowance for loan losses:
	Balance at beginning of period	$	5,460		$	4,245		$	644		$	2,241		$	7,717		$	2,120		$	-		$	9,058		$	31,485
	Additions:
	Provision		(110	)		(137	)		86			(101	)		(281	)		247			-			296			-
	Deductions:
	Chargeoffs		(60	)					-						(995	)		(35	)		-			-			(1,090	)
	Recoveries		180			15			-			-			590			7			-			-			792
	Net loan recoveries (losses)		120			15			-			-			(405	)		(28	)		-			-			(298	)
	Total allowance for loan losses	$	5,470		$	4,123		$	730		$	2,140		$	7,031		$	2,339		$	0		$	9,354		$	31,187
		Allowance for Credit Losses
		For the Three Months Ended March 31, 2014
		Commercial			Commercial			Construction			Residential			Consumer			Purchased			Purchased			Unallocated			Total
					Real Estate						Real Estate			Installment			Non-covered			Covered
														and Other			Loans			Loans
		(In thousands)
	Allowance for loan losses:
	Balance at beginning of period	$	4,005		$	12,070		$	602		$	405		$	3,198		$	-		$	1,561		$	9,852		$	31,693
	Additions:
	Provision		130			(974	)		(160	)		86			214			1,272			-			432			1,000
	Deductions:
	Chargeoffs		(60	)		-			-			-			(999	)		(260	)		-			-			(1,319	)
	Recoveries		168			163			3			-			400			1			-			-			735
	Net loan recoveries (losses)		108			163			3			-			(599	)		(259	)		-			-			(584	)
	Indemnification expiration		-			-			-			-			-			1,561			(1,561	)		-
	Balance at end of period		4,243			11,259			445			491			2,813			2,574			-			10,284			32,109
	Liability for off-balance sheet credit exposure		1,672			-			185			-			440			251			-			145			2,693
	Total allowance for credit losses	$	5,915		$	11,259		$	630		$	491		$	3,253		$	2,825		$	-		$	10,429		$	34,802
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, 2015
		Commercial			Commercial Real Estate			Construction			Residential Real Estate			Consumer Installment and Other			Purchased Non-covered Loans			Purchased Covered Loans			Unallocated			Total
		(In thousands)
	Allowance for loan losses:
	Individually evaluated for impairment	$	493		$	-		$	-		$	-		$	-		$	-		$	-		$	-		$	493
	Collectively evaluated for impairment		4,977			4,123			730			2,140			7,031			2,339			-			9,354			30,694
	Purchased loans with evidence of credit deterioration		-			-			-			-			-			-			-			-			-
	Total	$	5,470		$	4,123		$	730		$	2,140		$	7,031		$	2,339		$	-		$	9,354		$	31,187
	Carrying value of loans:
	Individually evaluated for impairment	$	12,459		$	597		$	-		$	574		$	599		$	10,740		$	-		$	-		$	24,969
	Collectively evaluated for impairment		379,404			548,339			12,438			139,760			371,376			186,835			16,107			-			1,654,259
	Purchased loans with evidence of credit deterioration		-			-			-			-			-			4,434			222			-			4,656
	Total	$	391,863		$	548,936		$	12,438		$	140,334		$	371,975		$	202,009		$	16,329		$	-		$	1,683,884
		Allowance for Credit Losses and Recorded Investment in Loans Evaluated for Impairment
		At December 31, 2014
		Commercial			Commercial Real Estate			Construction			Residential Real Estate			Consumer Installment and Other			Purchased Non-covered Loans			Purchased Covered Loans			Unallocated			Total
		(In thousands)
	Allowance for credit losses:
	Individually evaluated for impairment	$	496		$	-		$	-		$	-		$	-		$	-		$	-		$	-		$	496
	Collectively evaluated for impairment		7,372			4,245			988			2,241			8,154			2,120			-			8,562			33,682
	Purchased loans with evidence of credit deterioration		-			-			-			-			-			-			-			-			-
	Total	$	7,868		$	4,245		$	988		$	2,241		$	8,154		$	2,120		$	-		$	8,562		$	34,178
	Carrying value of loans:
	Individually evaluated for impairment	$	11,811		$	2,970		$	-		$	574		$	599		$	12,364		$	-		$	-		$	28,318
	Collectively evaluated for impairment		362,194			564,624			11,003			146,351			370,243			196,034			16,851			-			1,667,300
	Purchased loans with evidence of credit deterioration		-			-			-			-			-			4,445			227			-			4,672
	Total	$	374,005		$	567,594		$	11,003		$	146,925		$	370,842		$	212,843		$	17,078		$	-		$	1,700,290
Financing Receivable Credit Quality Indicators [Table Text Block]		Credit Risk Profile by Internally Assigned Grade
		At March 31, 2015
		Commercial			Commercial Real Estate			Construction			Residential Real Estate			Consumer Installment and Other			Purchased Non-covered Loans			Purchased Covered Loans (1)			Total
		(In thousands)
	Grade:
	Pass	$	384,159		$	509,428		$	12,438		$	137,992		$	370,845		$	172,947		$	14,938		$	1,602,747
	Substandard		7,692			39,508			-			2,342			906			37,691			1,591			89,730
	Doubtful		12			-			-			-			8			76			-			96
	Loss		-			-			-			-			216			-			-			216
	Credit risk discount		-			-			-			-			-			(8,705	)		(200	)		(8,905	)
	Total	$	391,863		$	548,936		$	12,438		$	140,334		$	371,975		$	202,009		$	16,329		$	1,683,884
		Credit Risk Profile by Internally Assigned Grade
		At December 31, 2014
		Commercial			Commercial Real Estate			Construction			Residential Real Estate			Consumer Installment and Other			Purchased Non-covered Loans			Purchased Covered Loans (1)			Total
		(In thousands)
	Grade:
	Pass	$	366,487		$	527,980		$	11,003		$	144,902		$	369,618		$	182,644		$	15,509		$	1,618,143
	Substandard		7,506			39,614			-			2,023			734			39,473			2,037			91,387
	Doubtful		12			-			-			-			12			77			-			101
	Loss		-			-			-			-			478			21			-			499
	Credit risk discount		-			-			-			-			-			(9,372	)		(468	)		(9,840	)
	Total	$	374,005		$	567,594		$	11,003		$	146,925		$	370,842		$	212,843		$	17,078		$	1,700,290
Past Due Financing Receivables [Table Text Block]		Summary of Loans by Delinquency and Nonaccrual Status
		At March 31, 2015
		Current and Accruing			30-59 Days Past Due and Accruing			60-89 Days Past Due and Accruing			Past Due 90 days or More and Accruing			Nonaccrual			Total Loans
		(In thousands)
	Commercial	$	388,683		$	2,355		$	533		$	-		$	292		$	391,863
	Commercial real estate		534,341			7,960			5,109			-			1,526			548,936
	Construction		12,438			-			-			-			-			12,438
	Residential real estate		136,975			1,976			479			-			904			140,334
	Consumer installment and other		369,260			1,548			357			191			619			371,975
	Total originated loans		1,441,697			13,839			6,478			191			3,341			1,465,546
	Purchased non-covered loans		187,198			2,945			1,821			-			10,045			202,009
	Purchased covered loans		16,208			121			-			-			-			16,329
	Total	$	1,645,103		$	16,905		$	8,299		$	191		$	13,386		$	1,683,884
		Summary of Loans by Delinquency and Nonaccrual Status
		At December 31, 2014
		Current and Accruing			30-59 Days Past Due and Accruing			60-89 Days Past Due and Accruing			Past Due 90 days or More and Accruing			Nonaccrual			Total Loans
		(In thousands)
	Commercial	$	372,235		$	1,704		$	36		$	-		$	30		$	374,005
	Commercial real estate		557,041			6,500			-			-			4,053			567,594
	Construction		11,003			-			-			-			-			11,003
	Residential real estate		144,021			1,513			817			-			574			146,925
	Consumer installment and other		365,753			3,310			625			502			652			370,842
	Total originated loans		1,450,053			13,027			1,478			502			5,309			1,470,369
	Purchased non-covered loans		196,150			4,204			491			-			11,998			212,843
	Purchased covered loans		16,389			389			3			-			297			17,078
	Total	$	1,662,592		$	17,620		$	1,972		$	502		$	17,604		$	1,700,290
Effect Of Nonaccrual Loans On Interest Income [Table Text Block]		For the Three Months Ended
		March 31,
		2015			2014
		(In thousands)
	Interest income that would have been recognized had the loans performed in accordance with their original terms	$	311		$	260
	Less: Interest income recognized on nonaccrual loans		(205	)		(44	)
	Total reduction of interest income	$	106		$	216
Impaired Financing Receivables [Table Text Block]		Impaired Loans
		At March 31, 2015
		Recorded			Unpaid			Related
		Investment			Principal			Allowance
					Balance
		(In thousands)
	Impaired loans with no related allowance recorded:
	Commercial	$	2,651		$	2,715		$	-
	Commercial real estate		17,159			23,100			-
	Construction		-			-			-
	Residential real estate		1,145			1,175			-
	Consumer installment and other		990			1,097			-
	Impaired loans with an allowance recorded:
	Commercial		9,860			9,860			493
	Commercial real estate		-			-			-
	Construction		-			-			-
	Residential real estate		-			-			-
	Consumer installment and other		-			-			-
	Total:
	Commercial	$	12,511		$	12,575		$	493
	Commercial real estate		17,159			23,100			-
	Construction		-			-			-
	Residential real estate		1,145			1,175			-
	Consumer installment and other		990			1,097
		Impaired Loans
		At December 31, 2014
		Recorded			Unpaid			Related
		Investment			Principal			Allowance
					Balance
		(In thousands)
	Impaired loans with no related allowance recorded:
	Commercial	$	2,031		$	2,095		$	-
	Commercial real estate		19,478			25,519			-
	Construction		1,834			1,884			-
	Residential real estate		574			574			-
	Consumer installment and other		1,518			1,628			-
	Impaired loans with an allowance recorded:
	Commercial		9,910			9,910			496
	Commercial real estate		-			-			-
	Construction		-			-			-
	Residential real estate		-			-			-
	Consumer installment and other		-			-			-
	Total:
	Commercial	$	11,941		$	12,005		$	496
	Commercial real estate		19,478			25,519			-
	Construction		1,834			1,884			-
	Residential real estate		574			574			-
	Consumer installment and other		1,518			1,628
Impaired Financing Receivables Supplemental Schedule [Table Text Block]		Impaired Loans
		For the Three Months Ended March 31,
		2015						2014
		Average			Recognized			Average			Recognized
		Recorded			Interest			Recorded			Interest
		Investment			Income			Investment			Income
		(In thousands)
	Commercial	$	12,226		$	146		$	4,842		$	67
	Commercial real estate		18,318			257			19,298			117
	Construction		917			-			2,259			-
	Residential real estate		860			6			162			-
	Consumer installment and other		1,254			6			1,716			8
	Total	$	33,575		$	415		$	28,277		$	192
Troubled Debt Restructurings on Financing Receivables [Table Text Block]		Troubled Debt Restructurings
		At March 31, 2015
		Number of			Pre-Modification			Period-End			Period-End
		Contracts			Carrying Value			Carrying Value			Individual
											Impairment
											Allowance
		(In thousands)
	Commercial		6		$	2,813		$	2,599		$	-
	Commercial real estate		5			3,875			3,693			-
	Residential real estate		1			18			5			-
	Consumer installment and other		1			241			240			-
	Total		13		$	6,947		$	6,537		$	-
		Troubled Debt Restructurings
		At March 31, 2014
		Number of			Pre-Modification			Period-End			Period-End
		Contracts			Carrying Value			Carrying Value			Individual
											Impairment
											Allowance
		(In thousands)
	Commercial		3		$	3,201		$	2,938		$	262
	Commercial real estate		2			2,291			2,316			-
	Consumer installment and other		1			18			17			-
	Total		6		$	5,510		$	5,271		$	262

Note_6_Other_Assets_Tables

Note 6 - Other Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure Text Block Supplement [Abstract]
Schedule of Other Assets [Table Text Block]		At March 31,		At December 31,
		2015		2014
		(In thousands)
	Cost method equity investments:
	Federal Reserve Bank stock (1)	$	14,069	$	14,069
	Federal Home Loan Bank stock (2)		450		940
	Other investments		201		241
	Total cost method equity investments		14,720		15,250
	Life insurance cash surrender value		47,098		46,479
	Net deferred tax asset		47,138		50,903
	Limited partnership investments		17,445		18,673
	Interest receivable		18,582		19,394
	Prepaid assets		5,719		5,609
	Other assets		9,872		10,150
	Total other assets	$	160,574	$	166,458
Schedule of Amounts Recognized in Net Income [Table Text Block]		For the Three Months Ended
		March 31,
		2015		2014
		(In thousands)
	Investment loss included in pre-tax income	$	675	$	700
	Tax credits recognized in  provision for income taxes		658		771

Note_7_Goodwill_and_Identifiab1

Note 7 - Goodwill and Identifiable Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]			At March 31,		At December 31,
			2015		2014
		(In thousands)
	Goodwill		$	121,673	$	121,673
Schedule of Finite-Lived Intangible Assets [Table Text Block]			At March 31, 2015					At December 31, 2014
			Gross		Accumulated			Gross		Accumulated
			Carrying		Amortization			Carrying		Amortization
			Amount					Amount
			(In thousands)
	Core Deposit Intangibles		$	56,808	$	(44,116	)	$	56,808	$	(43,188	)
	Merchant Draft Processing Intangible			10,300		(9,706	)		10,300		(9,633	)
	Total Identifiable Intangible Assets		$	67,108	$	(53,822	)	$	67,108	$	(52,821	)
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]			Core		Merchant			Total
			Deposit		Draft
			Intangibles		Processing
					Intangible
			(In thousands)
	Three months ended March 31, 2015 (actual)		$	928	$	73		$	1,001
	Estimate for year ended December 31, 2015			3,594		262			3,856
	2016			3,292		212			3,504
	2017			2,913		164			3,077
	2018			1,892		29			1,921
	2019			538		-			538
	2020			287		-			287

Note_8_Deposits_and_Borrowed_F1

Note 8 - Deposits and Borrowed Funds (Tables)	3 Months Ended
	Mar. 31, 2015
Deposits And Borrowed Funds [Abstract]
Deposits [Table Text Block]		Deposits
		At March 31, 2015		At December 31, 2014
		(In thousands)
	Noninterest-bearing	$	1,902,904	$	1,910,781
	Interest-bearing:
	Transaction		787,633		792,448
	Savings		1,313,007		1,260,819
	Time deposits less than $100 thousand		165,412		169,959
	Time deposits $100 thousand through $250 thousand		109,909		113,023
	Time deposits more than $250 thousand		101,211		102,161
	Total deposits	$	4,380,076	$	4,349,191

Note_9_Fair_Value_Measurements1

Note 9 - Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis [Table Text Block]		At March 31, 2015
		Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
				(Level 1)		(Level 2 )		(Level 3 )
		(In thousands)
	U.S. Treasury securities	$	3,504	$	3,504	$	-	$	-
	Securities of U.S. Government sponsored entities		633,608		633,608		-		-
	Residential mortgage-backed securities		24,298		-		24,298		-
	Commercial mortgage-backed securities		2,820		-		2,820		-
	Obligations of states and political subdivisions		175,694		-		175,694		-
	Residential collateralized mortgage obligations		215,899		-		215,899		-
	Asset-backed securities		2,992		-		2,992		-
	FHLMC and FNMA stock		6,460		6,460		-		-
	Corporate securities		709,257		-		709,257		-
	Other securities		2,788		906		1,882		-
	Total securities available for sale	$	1,777,320	$	644,478	$	1,132,842	$	-
		At December 31, 2014
		Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
				(Level 1)		(Level 2 )		(Level 3 )
		(In thousands)
	U.S. Treasury securities	$	3,505	$	3,505	$	-	$	-
	Securities of U.S. Government sponsored entities		635,188		635,188		-		-
	Residential mortgage-backed securities		26,407		-		26,407		-
	Commercial mortgage-backed securities		2,919		-		2,919		-
	Obligations of states and political subdivisions		181,799		-		181,799		-
	Residential collateralized mortgage obligations		222,457		-		222,457		-
	Asset-backed securities		8,313		-		8,313		-
	FHLMC and FNMA stock		5,168		5,168		-		-
	Corporate securities		512,239		-		512,239		-
	Other securities		2,786		910		1,876		-
	Total securities available for sale	$	1,600,781	$	644,771	$	956,010	$	-
Fair Value Measurements, Nonrecurring [Table Text Block]										For the Three
										Months Ended
		At March 31, 2015								31-Mar-15
		Fair Value		Level 1		Level 2		Level 3		Total Losses
		(In thousands)
	Other real estate owned	$	9,233	$	-	$	9,233	$	-	$	(243	)
	Impaired loans		16,120		-		6,753		9,367		-
	Total assets measured at fair value on a nonrecurring basis	$	25,353	$	-	$	15,986	$	9,367	$	(243	)
										For the
										Year Ended
		At December 31, 2014								31-Dec-14
		Fair Value		Level 1		Level 2		Level 3		Total Losses
		(In thousands)
	Other real estate owned	$	6,374	$	-	$	6,374	$	-	$	(358	)
	Impaired loans		17,085		-		7,670		9,415		(884	)
	Total assets measured at fair value on a nonrecurring basis	$	23,459	$	-	$	14,044	$	9,415	$	(1,242	)
Fair Value, by Balance Sheet Grouping [Table Text Block]		At March 31, 2015
		Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
						(Level 1)		(Level 2 )		(Level 3 )
	Financial Assets:	(In thousands)
	Cash and due from banks	$	247,450	$	247,450	$	247,450	$	-	$	-
	Investment securities held to maturity		1,015,231		1,030,865		1,007		1,029,858		-
	Loans		1,652,697		1,665,928		-		-		1,665,928
	Financial Liabilities:
	Deposits	$	4,380,076	$	4,379,658	$	-	$	4,003,544	$	376,114
	Short-term borrowed funds		82,960		82,960		-		82,960		-
		At December 31, 2014
		Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
						(Level 1)		(Level 2 )		(Level 3 )
	Financial Assets:	(In thousands)
	Cash and due from banks	$	380,836	$	380,836	$	380,836	$	-	$	-
	Investment securities held to maturity		1,038,658		1,048,562		1,077		1,047,485		-
	Loans		1,668,805		1,685,048		-		-		1,685,048
	Financial Liabilities:
	Deposits	$	4,349,191	$	4,348,958	$	-	$	3,964,048	$	384,910
	Short-term borrowed funds		89,784		89,784		-		89,784		-
	Federal Home Loan Bank advances		20,015		20,014		20,014		-		-

Note_11_Earnings_Per_Common_Sh1

Note 11 - Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]		For the Three Months Ended
		March 31,
		2015		2014
		(In thousands, except per share data)
	Net income (numerator)	$	14,557	$	15,307
	Basic earnings per common share
	Weighted average number of common shares outstanding - basic (denominator)		25,651		26,433
	Basic earnings per common share	$	0.57	$	0.58
	Diluted earnings per common share
	Weighted average number of common shares outstanding - basic		25,651		26,433
	Add common stock equivalents for options		4		104
	Weighted average number of common shares outstanding - diluted (denominator)		25,655		26,537
	Diluted earnings per common share	$	0.57	$	0.58

Note_3_Investment_Securities_D

Note 3 - Investment Securities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Note 3 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	$976,816	$630,797
Pledged Financial Instruments, Not Separately Reported, Securities	720,036	757,623
US Government-sponsored Enterprises Debt Securities [Member] | Call Option [Member] | Interest Coupons [Member]
Note 3 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	71,129
US Government-sponsored Enterprises Debt Securities [Member] | Call Option [Member]
Note 3 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	$351,761

Note_3_Investment_Securities_D1

Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	$1,760,585		$1,591,464
Gross Unrealized Gains	24,191		20,806
Gross Unrealized Losses	-7,456		-11,489
Fair Value	1,777,320		1,600,781
US Treasury Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	3,500		3,500
Gross Unrealized Gains	4		5
Fair Value	3,504		3,505
US Government-sponsored Enterprises Debt Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	631,974		635,278
Gross Unrealized Gains	1,637		937
Gross Unrealized Losses	-3		-1,027
Fair Value	633,608		635,188
Residential Mortgage Backed Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	22,625		24,647
Gross Unrealized Gains	1,682		1,776
Gross Unrealized Losses	-9		-16
Fair Value	24,298		26,407
Commercial Mortgage Backed Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	2,826		2,923
Gross Unrealized Gains	5		6
Gross Unrealized Losses	-11		-10
Fair Value	2,820		2,919
US States and Political Subdivisions Debt Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	165,063		171,907
Gross Unrealized Gains	10,756		10,015
Gross Unrealized Losses	-125		-123
Fair Value	175,694		181,799
Residential Collateralized Mortgage Obligations [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	220,397		230,347
Gross Unrealized Gains	644		634
Gross Unrealized Losses	-5,142		-8,524
Fair Value	215,899		222,457
Asset-backed Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	3,015		8,349
Gross Unrealized Losses	-23		-36
Fair Value	2,992		8,313
FHLMC And FNMA Stock [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	775	[1],[2]	775	[1],[2]
Gross Unrealized Gains	5,685	[1],[2]	4,393	[1],[2]
Gross Unrealized Losses		[1],[2]		[1],[2]
Fair Value	6,460	[1],[2]	5,168	[1],[2]
Domestic Corporate Debt Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	708,371		511,699
Gross Unrealized Gains	2,911		2,169
Gross Unrealized Losses	-2,025		-1,629
Fair Value	709,257		512,239
Other Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio [Line Items]
Amortized Cost	2,039		2,039
Gross Unrealized Gains	867		871
Gross Unrealized Losses	-118		-124
Fair Value	$2,788		$2,786
[1]	Federal Home Loan Mortgage Corporation
[2]	Federal National Mortgage Association

Note_3_Investment_Securities_D2

Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Market Value of Held to Maturity Investment Securities Portfolio (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Market Value of Held to Maturity Investment Securities Portfolio [Line Items]
Amortized Cost	$1,015,231	$1,038,658
Gross Unrealized Gains	17,620	14,780
Gross Unrealized Losses	-1,986	-4,876
Estimated Market Value	1,030,865	1,048,562
US Government-sponsored Enterprises Debt Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Market Value of Held to Maturity Investment Securities Portfolio [Line Items]
Amortized Cost	995	1,066
Gross Unrealized Gains	12	11
Estimated Market Value	1,007	1,077
Residential Mortgage Backed Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Market Value of Held to Maturity Investment Securities Portfolio [Line Items]
Amortized Cost	57,259	59,078
Gross Unrealized Gains	1,319	1,183
Gross Unrealized Losses	-64	-137
Estimated Market Value	58,514	60,124
US States and Political Subdivisions Debt Securities [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Market Value of Held to Maturity Investment Securities Portfolio [Line Items]
Amortized Cost	712,374	720,189
Gross Unrealized Gains	13,478	11,350
Gross Unrealized Losses	-1,062	-2,358
Estimated Market Value	724,790	729,181
Residential Collateralized Mortgage Obligations [Member]
Note 3 - Investment Securities (Details) - Amortized Cost, Unrealized Gains and Losses, and Estimated Market Value of Held to Maturity Investment Securities Portfolio [Line Items]
Amortized Cost	244,603	258,325
Gross Unrealized Gains	2,811	2,236
Gross Unrealized Losses	-860	-2,381
Estimated Market Value	$246,554	$258,180

Note_3_Investment_Securities_D3

Note 3 - Investment Securities (Details) - Amortized Cost and Estimated Market Value of Securities by Contractual Maturity (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Maturity in years:
Securities Available for Sale, Amortized Cost, 1 year or less	$80,420	$57,891
Securities Available for Sale, Estimated Market Value, 1 year or less	80,658	57,991
Securities Held to Maturity, Amortized Cost, 1 year or less	15,322	15,355
Securities Held to Maturity, Estimated Market Value, 1 year or less	15,829	15,855
Securities Available for Sale, Amortized Cost, Over 1 to 5 years	973,932	629,200
Securities Available for Sale, Estimated Market Value, Over 1 to 5 years	976,816	630,797
Securities Held to Maturity, Amortized Cost, Over 1 to 5 years	247,297	228,380
Securities Held to Maturity, Estimated Market Value, Over 1 to 5 years	249,867	230,248
Securities Available for Sale, Amortized Cost, Over 5 to 10 years	409,874	584,872
Securities Available for Sale, Estimated Market Value, Over 5 to 10 years	416,005	589,250
Securities Held to Maturity, Amortized Cost, Over 5 to 10 years	270,191	285,219
Securities Held to Maturity, Estimated Market Value, Over 5 to 10 years	275,665	288,631
Securities Available for Sale, Amortized Cost, Over 10 years	47,697	58,770
Securities Available for Sale, Estimated Market Value, Over 10 years	51,576	63,006
Securities Held to Maturity, Amortized Cost, Over 10 years	180,559	192,301
Securities Held to Maturity, Estimated Market Value, Over 10 years	184,436	195,524
Securities Available for Sale, Amortized Cost, Subtotal	1,511,923	1,330,733
Securities Available for Sale, Estimated Market Value, Subtotal	1,525,055	1,341,044
Securities Held to Maturity, Amortized Cost, Subtotal	713,369	721,255
Securities Held to Maturity, Estimated Market Value, Subtotal	725,797	730,258
Securities Available for Sale, Amortized Cost, Mortgage-backed securities and residential collateralized mortgage obligations	245,848	257,917
Securities Available for Sale, Estimated Market Value, Mortgage-backed securities and residential collateralized mortgage obligations	243,017	251,783
Securities Held to Maturity, Amortized Cost, Mortgage-backed securities and residential collateralized mortgage obligations	301,862	317,403
Securities Held to Maturity, Estimated Market Value, Mortgage-backed securities and residential collateralized mortgage obligations	305,068	318,304
Securities Available for Sale, Amortized Cost, Other securities	2,814	2,814
Securities Available for Sale, Estimated Market Value, Other securities	9,248	7,954
Securities Available for Sale, Amortized Cost, Total	1,760,585	1,591,464
Securities Available for Sale, Estimated Market Value, Total	1,777,320	1,600,781
Securities Held to Maturity, Amortized Cost, Total	1,015,231	1,038,658
Securities Held to Maturity, Estimated Market Value, Total	$1,030,865	$1,048,562

Note_3_Investment_Securities_D4

Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio [Line Items]
Available for sale securities, less than 12 months, number of investment positions	65	77
Available for sale securities, less than 12 months, fair value	$235,386	$427,156
Available for sale securities, less than 12 months, unrealized losses	-1,795	-2,325
Available for sale securities, 12 months or longer, number of investment positions	51	60
Available for sale securities, 12 months or longer, fair value	237,977	261,583
Available for sale securities, 12 months or longer, unrealized losses	-5,661	-9,164
Available for sale securities, total, number of investment positions	116	137
Available for sale securities, total, fair value	473,363	688,739
Available for sale securities, total, unrealized losses	-7,456	-11,489
Held to Maturity securities, less than 12 months, number of investment positions	51	112
Held to Maturity securities, less than 12 months, fair value	60,367	109,601
Held to Maturity securities, less than 12 months, unrealized losses	-371	-737
Held to Maturity securities, 12 months or longer, number of investment positions	100	161
Held to Maturity securities, 12 months or longer, fair value	154,731	243,084
Held to Maturity securities, 12 months or longer, unrealized losses	-1,615	-4,139
Held to Maturity securities, total, number of investment positions	151	273
Held to Maturity securities, total, fair value	215,098	352,685
Held to Maturity securities, total, unrealized losses	-1,986	-4,876
US Government-sponsored Enterprises Debt Securities [Member]
Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio [Line Items]
Available for sale securities, less than 12 months, number of investment positions		15
Available for sale securities, less than 12 months, fair value		253,632
Available for sale securities, less than 12 months, unrealized losses		-989
Available for sale securities, 12 months or longer, number of investment positions	1	1
Available for sale securities, 12 months or longer, fair value	9,997	9,963
Available for sale securities, 12 months or longer, unrealized losses	-3	-38
Available for sale securities, total, number of investment positions	1	16
Available for sale securities, total, fair value	9,997	263,595
Available for sale securities, total, unrealized losses	-3	-1,027
Residential Mortgage Backed Securities [Member]
Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio [Line Items]
Available for sale securities, 12 months or longer, number of investment positions	1	2
Available for sale securities, 12 months or longer, fair value	803	822
Available for sale securities, 12 months or longer, unrealized losses	-9	-16
Available for sale securities, total, number of investment positions	1	2
Available for sale securities, total, fair value	803	822
Available for sale securities, total, unrealized losses	-9	-16
Held to Maturity securities, less than 12 months, number of investment positions	2	4
Held to Maturity securities, less than 12 months, fair value	14,483	19,467
Held to Maturity securities, less than 12 months, unrealized losses	-60	-132
Held to Maturity securities, 12 months or longer, number of investment positions	1	1
Held to Maturity securities, 12 months or longer, fair value	163	201
Held to Maturity securities, 12 months or longer, unrealized losses	-4	-5
Held to Maturity securities, total, number of investment positions	3	5
Held to Maturity securities, total, fair value	14,646	19,668
Held to Maturity securities, total, unrealized losses	-64	-137
Commercial Mortgage Backed Securities [Member]
Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio [Line Items]
Available for sale securities, less than 12 months, number of investment positions	1	1
Available for sale securities, less than 12 months, fair value	921	942
Available for sale securities, less than 12 months, unrealized losses	-6	-7
Available for sale securities, 12 months or longer, number of investment positions	1	1
Available for sale securities, 12 months or longer, fair value	751	803
Available for sale securities, 12 months or longer, unrealized losses	-5	-3
Available for sale securities, total, number of investment positions	2	2
Available for sale securities, total, fair value	1,672	1,745
Available for sale securities, total, unrealized losses	-11	-10
US States and Political Subdivisions Debt Securities [Member]
Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio [Line Items]
Available for sale securities, less than 12 months, number of investment positions	5	7
Available for sale securities, less than 12 months, fair value	2,380	2,548
Available for sale securities, less than 12 months, unrealized losses	-20	-18
Available for sale securities, 12 months or longer, number of investment positions	11	17
Available for sale securities, 12 months or longer, fair value	3,842	5,518
Available for sale securities, 12 months or longer, unrealized losses	-105	-105
Available for sale securities, total, number of investment positions	16	24
Available for sale securities, total, fair value	6,222	8,066
Available for sale securities, total, unrealized losses	-125	-123
Held to Maturity securities, less than 12 months, number of investment positions	45	103
Held to Maturity securities, less than 12 months, fair value	32,117	76,202
Held to Maturity securities, less than 12 months, unrealized losses	-177	-439
Held to Maturity securities, 12 months or longer, number of investment positions	83	138
Held to Maturity securities, 12 months or longer, fair value	70,639	123,370
Held to Maturity securities, 12 months or longer, unrealized losses	-885	-1,919
Held to Maturity securities, total, number of investment positions	128	241
Held to Maturity securities, total, fair value	102,756	199,572
Held to Maturity securities, total, unrealized losses	-1,062	-2,358
Residential Collateralized Mortgage Obligations [Member]
Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio [Line Items]
Available for sale securities, 12 months or longer, number of investment positions	29	32
Available for sale securities, 12 months or longer, fair value	184,632	205,074
Available for sale securities, 12 months or longer, unrealized losses	-5,142	-8,524
Available for sale securities, total, number of investment positions	29	32
Available for sale securities, total, fair value	184,632	205,074
Available for sale securities, total, unrealized losses	-5,142	-8,524
Held to Maturity securities, less than 12 months, number of investment positions	4	5
Held to Maturity securities, less than 12 months, fair value	13,767	13,932
Held to Maturity securities, less than 12 months, unrealized losses	-134	-166
Held to Maturity securities, 12 months or longer, number of investment positions	16	22
Held to Maturity securities, 12 months or longer, fair value	83,929	119,513
Held to Maturity securities, 12 months or longer, unrealized losses	-726	-2,215
Held to Maturity securities, total, number of investment positions	20	27
Held to Maturity securities, total, fair value	97,696	133,445
Held to Maturity securities, total, unrealized losses	-860	-2,381
Asset-backed Securities [Member]
Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio [Line Items]
Available for sale securities, less than 12 months, number of investment positions		1
Available for sale securities, less than 12 months, fair value		5,008
Available for sale securities, less than 12 months, unrealized losses		-7
Available for sale securities, 12 months or longer, number of investment positions	1	1
Available for sale securities, 12 months or longer, fair value	2,992	3,305
Available for sale securities, 12 months or longer, unrealized losses	-23	-29
Available for sale securities, total, number of investment positions	1	2
Available for sale securities, total, fair value	2,992	8,313
Available for sale securities, total, unrealized losses	-23	-36
Domestic Corporate Debt Securities [Member]
Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio [Line Items]
Available for sale securities, less than 12 months, number of investment positions	59	53
Available for sale securities, less than 12 months, fair value	232,085	165,026
Available for sale securities, less than 12 months, unrealized losses	-1,769	-1,304
Available for sale securities, 12 months or longer, number of investment positions	6	5
Available for sale securities, 12 months or longer, fair value	33,078	34,222
Available for sale securities, 12 months or longer, unrealized losses	-256	-325
Available for sale securities, total, number of investment positions	65	58
Available for sale securities, total, fair value	265,163	199,248
Available for sale securities, total, unrealized losses	-2,025	-1,629
Other Securities [Member]
Note 3 - Investment Securities (Details) - Gross Unrealized Losses, Investment Securities Portfolio [Line Items]
Available for sale securities, 12 months or longer, number of investment positions	1	1
Available for sale securities, 12 months or longer, fair value	1,882	1,876
Available for sale securities, 12 months or longer, unrealized losses	-118	-124
Available for sale securities, total, number of investment positions	1	1
Available for sale securities, total, fair value	1,882	1,876
Available for sale securities, total, unrealized losses	($118)	($124)

Note_3_Investment_Securities_D5

Note 3 - Investment Securities (Details) - Interest Income from Investment Securities (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Interest Income from Investment Securities [Abstract]
Taxable	$7,554	$5,683
Tax-exempt	6,133	6,980
Total interest income from investment securities	$13,687	$12,663

Note_4_Loans_and_Allowance_for2

Note 4 - Loans and Allowance for Credit Losses (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Note 4 - Loans and Allowance for Credit Losses (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment	$6,537	$5,271
Impaired Loans, Restructured, Nonaccrual Status	998		0
Troubled Debt Restructurings During Period	5	1
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Long-term Federal Home Loan Bank Advances			20,015
Restricted Pledged Loans			18,366
Loans Receivable Held-for-sale, Amount	0		0
Other Real Estate, Foreclosed Assets, and Repossessed Assets	9,233	12,186	6,374
Mortgage Loans in Process of Foreclosure, Amount	599	902
Residential Real Estate Included in OREO [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) [Line Items]
Real Estate Acquired Through Foreclosure	486	967
Restructured Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment	6,537		4,837
Five Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,736
One Loan [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment		$17

Note_4_Loans_and_Allowance_for3

Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]
Originated loans	$1,465,546	$1,470,369
Purchased covered loans:
Gross purchased covered loans	16,529	17,546
Credit risk discount, covered loans	-200	-468
Purchased non-covered loans:
Gross purchased non-covered loans	210,714	222,215
Credit risk discount, non-covered loans	-8,705	-9,372
Total	1,683,884	1,700,290
Commercial Portfolio Segment [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]
Originated loans	391,863	374,005
Purchased non-covered loans:
Gross purchased non-covered loans	17,367	19,166
Credit risk discount, non-covered loans	-1,255	-1,356
Total	407,975	391,815
Commercial Real Estate Portfolio Segment [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]
Originated loans	548,936	567,594
Purchased non-covered loans:
Gross purchased non-covered loans	152,167	157,502
Credit risk discount, non-covered loans	-5,904	-6,492
Total	695,199	718,604
Construction Portfolio Segment [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]
Originated loans	12,438	11,003
Purchased non-covered loans:
Gross purchased non-covered loans	1,021	2,919
Credit risk discount, non-covered loans		-50
Total	13,459	13,872
Residential Portfolio Segment [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]
Originated loans	140,334	146,925
Purchased covered loans:
Gross purchased covered loans	2,574	2,626
Credit risk discount, covered loans	-133	-434
Purchased non-covered loans:
Gross purchased non-covered loans	1,206	972
Credit risk discount, non-covered loans	-262	-262
Total	143,719	149,827
Consumer Portfolio Segment [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]
Originated loans	371,975	370,842
Purchased covered loans:
Gross purchased covered loans	13,955	14,920
Credit risk discount, covered loans	-67	-34
Purchased non-covered loans:
Gross purchased non-covered loans	38,953	41,656
Credit risk discount, non-covered loans	-1,284	-1,212
Total	$423,532	$426,172

Note_4_Loans_and_Allowance_for4

Note 4 - Loans and Allowance for Credit Losses (Details) - Changes in the Carrying Amount of Impaired Purchased Loans (Impaired Purchased Loans [Member], USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Impaired Purchased Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Changes in the Carrying Amount of Impaired Purchased Loans [Line Items]
Carrying amount at the beginning of the period	$4,672	$4,936
Reductions during the period	-16	-264
Carrying amount at the end of the period	$4,656	$4,672

Note_4_Loans_and_Allowance_for5

Note 4 - Loans and Allowance for Credit Losses (Details) - Changes in the Accretable Yield for Purchased Loans (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Changes in the Accretable Yield for Purchased Loans [Abstract]
Balance at the beginning of the period	$2,261	$2,505
Reclassification from nonaccretable difference	739	5,016
Accretion	-973	-5,260
Change in FDIC indemnification	141	1,110
(Increase) in interest income	-832	-4,150
Balance at the end of the period	$2,027	$2,261

Note_4_Loans_and_Allowance_for6

Note 4 - Loans and Allowance for Credit Losses (Details) - Allowance for Credit Losses (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Allowance for loan losses:
Balance at beginning of period	$31,485	$31,693
Additions:
Provision		1,000
Deductions:
Chargeoffs	-1,090	-1,319
Recoveries	792	735
Net loan recoveries (losses)	-298	-584
Balance at end of period	31,187	32,109
Total allowance for credit losses	31,187	34,802	34,178
Liability for off-balance sheet credit exposure		2,693
Commercial [Member]
Allowance for loan losses:
Balance at beginning of period	5,460	4,005
Additions:
Provision	-110	130
Deductions:
Chargeoffs	-60	-60
Recoveries	180	168
Net loan recoveries (losses)	120	108
Balance at end of period	5,470	4,243
Total allowance for credit losses	5,470	5,915	7,868
Liability for off-balance sheet credit exposure		1,672
Commercial Real Estate Loans [Member]
Allowance for loan losses:
Balance at beginning of period	4,245	12,070
Additions:
Provision	-137	-974
Deductions:
Recoveries	15	163
Net loan recoveries (losses)	15	163
Balance at end of period	4,123	11,259
Total allowance for credit losses	4,123	11,259	4,245
Construction [Member]
Allowance for loan losses:
Balance at beginning of period	644	602
Additions:
Provision	86	-160
Deductions:
Recoveries		3
Net loan recoveries (losses)		3
Balance at end of period	730	445
Total allowance for credit losses	730	630	988
Liability for off-balance sheet credit exposure		185
Residential Real Estate Loans [Member]
Allowance for loan losses:
Balance at beginning of period	2,241	405
Additions:
Provision	-101	86
Deductions:
Balance at end of period	2,140	491
Total allowance for credit losses	2,140	491	2,241
Consumer Installment And Other [Member]
Allowance for loan losses:
Balance at beginning of period	7,717	3,198
Additions:
Provision	-281	214
Deductions:
Chargeoffs	-995	-999
Recoveries	590	400
Net loan recoveries (losses)	-405	-599
Balance at end of period	7,031	2,813
Total allowance for credit losses	7,031	3,253	8,154
Liability for off-balance sheet credit exposure		440
Purchased Non-Covered Loans [Member]
Allowance for loan losses:
Balance at beginning of period	2,120
Additions:
Provision	247	1,272
Deductions:
Chargeoffs	-35	-260
Recoveries	7	1
Net loan recoveries (losses)	-28	-259
Indemnification expiration		1,561
Balance at end of period	2,339	2,574
Total allowance for credit losses	2,339	2,825	2,120
Liability for off-balance sheet credit exposure		251
Purchased Covered Loans [Member]
Allowance for loan losses:
Balance at beginning of period		1,561
Deductions:
Indemnification expiration		-1,561
Balance at end of period	0
Unallocated Financing Receivable [Member]
Allowance for loan losses:
Balance at beginning of period	9,058	9,852
Additions:
Provision	296	432
Deductions:
Balance at end of period	9,354	10,284
Total allowance for credit losses	9,354	10,429	8,562
Liability for off-balance sheet credit exposure		$145

Note_4_Loans_and_Allowance_for7

Note 4 - Loans and Allowance for Credit Losses (Details) - Recorded Investment in Loans Evaluated for Impairment (USD $)	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
In Thousands, unless otherwise specified
Allowance for loan losses:
Individually evaluated for impairment	$493		$496
Collectively evaluated for impairment	30,694		33,682
Total	31,187		34,178		34,802
Carrying value of loans:
Individually evaluated for impairment	24,969		28,318
Collectively evaluated for impairment	1,654,259		1,667,300
Purchased loans with evidence of credit deterioration	4,656		4,672
Total	1,683,884		1,700,290
Commercial [Member]
Allowance for loan losses:
Individually evaluated for impairment	493		496
Collectively evaluated for impairment	4,977		7,372
Total	5,470		7,868		5,915
Carrying value of loans:
Individually evaluated for impairment	12,459		11,811
Collectively evaluated for impairment	379,404		362,194
Total	391,863		374,005
Commercial Real Estate Loans [Member]
Allowance for loan losses:
Collectively evaluated for impairment	4,123		4,245
Total	4,123		4,245		11,259
Carrying value of loans:
Individually evaluated for impairment	597		2,970
Collectively evaluated for impairment	548,339		564,624
Total	548,936		567,594
Construction [Member]
Allowance for loan losses:
Collectively evaluated for impairment	730		988
Total	730		988		630
Carrying value of loans:
Collectively evaluated for impairment	12,438		11,003
Total	12,438		11,003
Residential Real Estate Loans [Member]
Allowance for loan losses:
Collectively evaluated for impairment	2,140		2,241
Total	2,140		2,241		491
Carrying value of loans:
Individually evaluated for impairment	574		574
Collectively evaluated for impairment	139,760		146,351
Total	140,334		146,925
Consumer Installment And Other [Member]
Allowance for loan losses:
Collectively evaluated for impairment	7,031		8,154
Total	7,031		8,154		3,253
Carrying value of loans:
Individually evaluated for impairment	599		599
Collectively evaluated for impairment	371,376		370,243
Total	371,975		370,842
Purchased Non-Covered Loans [Member]
Allowance for loan losses:
Collectively evaluated for impairment	2,339		2,120
Total	2,339		2,120		2,825
Carrying value of loans:
Individually evaluated for impairment	10,740		12,364
Collectively evaluated for impairment	186,835		196,034
Purchased loans with evidence of credit deterioration	4,434		4,445
Total	202,009		212,843
Purchased Covered Loans [Member]
Carrying value of loans:
Collectively evaluated for impairment	16,107		16,851
Purchased loans with evidence of credit deterioration	222		227
Total	16,329	[1]	17,078	[1]
Unallocated Financing Receivable [Member]
Allowance for loan losses:
Collectively evaluated for impairment	9,354		8,562
Total	$9,354		$8,562		$10,429
[1]	Credit risk profile reflects internally assigned grade of purchased covered loans without regard to FDIC indemnification.

Note_4_Loans_and_Allowance_for8

Note 4 - Loans and Allowance for Credit Losses (Details) - Credit Risk Profile by Internally Assigned Grade (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Grade:
Loans by grade	$1,683,884		$1,700,290
Commercial [Member] | Pass [Member]
Grade:
Loans by grade	384,159		366,487
Commercial [Member] | Substandard [Member]
Grade:
Loans by grade	7,692		7,506
Commercial [Member] | Doubtful [Member]
Grade:
Loans by grade	12		12
Commercial [Member]
Grade:
Loans by grade	391,863		374,005
Commercial Real Estate Loans [Member] | Pass [Member]
Grade:
Loans by grade	509,428		527,980
Commercial Real Estate Loans [Member] | Substandard [Member]
Grade:
Loans by grade	39,508		39,614
Commercial Real Estate Loans [Member]
Grade:
Loans by grade	548,936		567,594
Construction [Member] | Pass [Member]
Grade:
Loans by grade	12,438		11,003
Construction [Member]
Grade:
Loans by grade	12,438		11,003
Residential Real Estate Loans [Member] | Pass [Member]
Grade:
Loans by grade	137,992		144,902
Residential Real Estate Loans [Member] | Substandard [Member]
Grade:
Loans by grade	2,342		2,023
Residential Real Estate Loans [Member]
Grade:
Loans by grade	140,334		146,925
Consumer Installment And Other [Member] | Pass [Member]
Grade:
Loans by grade	370,845		369,618
Consumer Installment And Other [Member] | Substandard [Member]
Grade:
Loans by grade	906		734
Consumer Installment And Other [Member] | Doubtful [Member]
Grade:
Loans by grade	8		12
Consumer Installment And Other [Member] | Unlikely to be Collected Financing Receivable [Member]
Grade:
Loans by grade	216		478
Consumer Installment And Other [Member]
Grade:
Loans by grade	371,975		370,842
Purchased Non-Covered Loans [Member] | Pass [Member]
Grade:
Loans by grade	172,947		182,644
Purchased Non-Covered Loans [Member] | Substandard [Member]
Grade:
Loans by grade	37,691		39,473
Purchased Non-Covered Loans [Member] | Doubtful [Member]
Grade:
Loans by grade	76		77
Purchased Non-Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Grade:
Loans by grade			21
Purchased Non-Covered Loans [Member] | Default Risk Purchase Discount [Member]
Grade:
Loans by grade	-8,705		-9,372
Purchased Non-Covered Loans [Member]
Grade:
Loans by grade	202,009		212,843
Purchased Covered Loans [Member] | Pass [Member]
Grade:
Loans by grade	14,938	[1]	15,509	[1]
Purchased Covered Loans [Member] | Substandard [Member]
Grade:
Loans by grade	1,591	[1]	2,037	[1]
Purchased Covered Loans [Member] | Doubtful [Member]
Grade:
Loans by grade		[1]		[1]
Purchased Covered Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Grade:
Loans by grade		[1]		[1]
Purchased Covered Loans [Member] | Default Risk Purchase Discount [Member]
Grade:
Loans by grade	-200	[1]	-468	[1]
Purchased Covered Loans [Member]
Grade:
Loans by grade	16,329	[1]	17,078	[1]
Pass [Member]
Grade:
Loans by grade	1,602,747		1,618,143
Substandard [Member]
Grade:
Loans by grade	89,730		91,387
Doubtful [Member]
Grade:
Loans by grade	96		101
Unlikely to be Collected Financing Receivable [Member]
Grade:
Loans by grade	216		499
Default Risk Purchase Discount [Member]
Grade:
Loans by grade	($8,905)		($9,840)
[1]	Credit risk profile reflects internally assigned grade of purchased covered loans without regard to FDIC indemnification.

Note_4_Loans_and_Allowance_for9

Note 4 - Loans and Allowance for Credit Losses (Details) - Loans by Delinquency and Nonaccrual Status (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	$1,645,103		$1,662,592
30-59 Days Past Due and Accruing	16,905		17,620
60-89 Days Past Due and Accruing	8,299		1,972
90 days or More and Accruing	191		502
Nonaccrual	13,386		17,604
Total Loans	1,683,884		1,700,290
Originated Loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	388,683		372,235
30-59 Days Past Due and Accruing	2,355		1,704
60-89 Days Past Due and Accruing	533		36
Nonaccrual	292		30
Total Loans	391,863		374,005
Originated Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	534,341		557,041
30-59 Days Past Due and Accruing	7,960		6,500
60-89 Days Past Due and Accruing	5,109
Nonaccrual	1,526		4,053
Total Loans	548,936		567,594
Originated Loans [Member] | Construction Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	12,438		11,003
Total Loans	12,438		11,003
Originated Loans [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	136,975		144,021
30-59 Days Past Due and Accruing	1,976		1,513
60-89 Days Past Due and Accruing	479		817
Nonaccrual	904		574
Total Loans	140,334		146,925
Originated Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	369,260		365,753
30-59 Days Past Due and Accruing	1,548		3,310
60-89 Days Past Due and Accruing	357		625
90 days or More and Accruing	191		502
Nonaccrual	619		652
Total Loans	371,975		370,842
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	1,441,697		1,450,053
30-59 Days Past Due and Accruing	13,839		13,027
60-89 Days Past Due and Accruing	6,478		1,478
90 days or More and Accruing	191		502
Nonaccrual	3,341		5,309
Total Loans	1,465,546		1,470,369
Purchased Non-Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	187,198		196,150
30-59 Days Past Due and Accruing	2,945		4,204
60-89 Days Past Due and Accruing	1,821		491
Nonaccrual	10,045		11,998
Total Loans	202,009		212,843
Purchased Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	16,208		16,389
30-59 Days Past Due and Accruing	121		389
60-89 Days Past Due and Accruing			3
Nonaccrual			297
Total Loans	16,329	[1]	17,078	[1]
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	407,975		391,815
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	695,199		718,604
Construction Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	13,459		13,872
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	143,719		149,827
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$423,532		$426,172
[1]	Credit risk profile reflects internally assigned grade of purchased covered loans without regard to FDIC indemnification.

Recovered_Sheet1

Note 4 - Loans and Allowance for Credit Losses (Details) - Effect of Nonaccrual Loans on Interest Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Effect of Nonaccrual Loans on Interest Income [Abstract]
Interest income that would have been recognized had the loans performed in accordance with their original terms	$311	$260
Less: Interest income recognized on nonaccrual loans	-205	-44
Total reduction of interest income	$106	$216

Recovered_Sheet2

Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Commercial [Member]
Impaired loans with no related allowance recorded:
Impaired loans with no related allowance recorded, Recorded Investment	$2,651	$2,031
Impaired loans with no related allowance recorded, Unpaid Principal Balance	2,715	2,095
Impaired loans with an allowance recorded:
Impaired loans with an allowance recorded, Recorded Investment	9,860	9,910
Impaired loans with an allowance recorded, Unpaid Principal Balance	9,860	9,910
Impaired loans with an allowance recorded, Related Allowance	493	496
Total:
Total Impaired loans, Recorded Investment	12,511	11,941
Total Impaired loans, Unpaid Principal Balance	12,575	12,005
Total Impaired loans, Related Allowance	493	496
Commercial Real Estate Loans [Member]
Impaired loans with no related allowance recorded:
Impaired loans with no related allowance recorded, Recorded Investment	17,159	19,478
Impaired loans with no related allowance recorded, Unpaid Principal Balance	23,100	25,519
Total:
Total Impaired loans, Recorded Investment	17,159	19,478
Total Impaired loans, Unpaid Principal Balance	23,100	25,519
Construction [Member]
Impaired loans with no related allowance recorded:
Impaired loans with no related allowance recorded, Recorded Investment		1,834
Impaired loans with no related allowance recorded, Unpaid Principal Balance		1,884
Total:
Total Impaired loans, Recorded Investment		1,834
Total Impaired loans, Unpaid Principal Balance		1,884
Residential Real Estate Loans [Member]
Impaired loans with no related allowance recorded:
Impaired loans with no related allowance recorded, Recorded Investment	1,145	574
Impaired loans with no related allowance recorded, Unpaid Principal Balance	1,175	574
Total:
Total Impaired loans, Recorded Investment	1,145	574
Total Impaired loans, Unpaid Principal Balance	1,175	574
Consumer Installment And Other [Member]
Impaired loans with no related allowance recorded:
Impaired loans with no related allowance recorded, Recorded Investment	990	1,518
Impaired loans with no related allowance recorded, Unpaid Principal Balance	1,097	1,628
Total:
Total Impaired loans, Recorded Investment	990	1,518
Total Impaired loans, Unpaid Principal Balance	$1,097	$1,628

Recovered_Sheet3

Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	$33,575	$28,277
Recognized Interest Income	415	192
Commercial [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	12,226	4,842
Recognized Interest Income	146	67
Commercial Real Estate Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	18,318	19,298
Recognized Interest Income	257	117
Construction [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	917	2,259
Residential Real Estate Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	860	162
Recognized Interest Income	6
Consumer Installment And Other [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	1,254	1,716
Recognized Interest Income	$6	$8

Recovered_Sheet4

Note 4 - Loans and Allowance for Credit Losses (Details) - Troubled Debt Restructurings (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Modifications [Line Items]
Number of Contracts	13	6
Pre-Modification Carrying Value	$6,947	$5,510
Period-End Carrying Value	6,537	5,271
Period-End Individual Impairment Allowance		262
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	6	3
Pre-Modification Carrying Value	2,813	3,201
Period-End Carrying Value	2,599	2,938
Period-End Individual Impairment Allowance		262
Commercial Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	5	2
Pre-Modification Carrying Value	3,875	2,291
Period-End Carrying Value	3,693	2,316
Residential Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1
Pre-Modification Carrying Value	18
Period-End Carrying Value	5
Consumer Installment And Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	1
Pre-Modification Carrying Value	241	18
Period-End Carrying Value	$240	$17

Note_5_Concentration_of_Credit1

Note 5 - Concentration of Credit Risk (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Note 5 - Concentration of Credit Risk (Details) [Line Items]
Loan Commitments and Standby Letters of Credit Related to Real Estate Loans (in Dollars)	$68,724,000	$66,086,000
Unsecured Loan Limit, Percentage of Shareholders' Equity, California Financial Code	15.00%
Secured and Unsecured Loan Limit Percentage, California Financial Code	25.00%
Commercial Real Estate Loans [Member]
Note 5 - Concentration of Credit Risk (Details) [Line Items]
Loan To Value Ratio Requirement	75.00%
Residential Real Estate Loans [Member]
Note 5 - Concentration of Credit Risk (Details) [Line Items]
Loan To Value Ratio Requirement	80.00%
Aggregate Loans [Member] | Customer Concentration Risk [Member]
Note 5 - Concentration of Credit Risk (Details) [Line Items]
Concentration Risk, Borrower Relationships	40
Concentration Risk, Aggregate Loan Amount (in Dollars)	$5,000,000

Note_6_Other_Assets_Details

Note 6 - Other Assets (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Note 6 - Other Assets (Details) [Line Items]
FRB Membership, Stock Subscription, Percent of Paid-Up Capital Stock and Surplus Requirement	6.00%
FHLB Borrowings, Minimum Activity-Based Requirement Percentage of Outstanding Advances	4.70%
	$17,445	$18,673
Qualified Affordable Housing Project Investments, Commitment	2,460
Contingent Commitment, Year 1 [Member]
Note 6 - Other Assets (Details) [Line Items]
Qualified Affordable Housing Project Investments, Commitment	614
Contingent Commitment, Year 2 [Member]
Note 6 - Other Assets (Details) [Line Items]
Qualified Affordable Housing Project Investments, Commitment	763
Contingent Commitment, Year 3 [Member]
Note 6 - Other Assets (Details) [Line Items]
Qualified Affordable Housing Project Investments, Commitment	$1,083

Note_6_Other_Assets_Details_Ot

Note 6 - Other Assets (Details) - Other Assets (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Cost method equity investments:
Federal Reserve Bank stock (1)	$14,069	[1]	$14,069	[1]
Federal Home Loan Bank stock (2)	450	[2]	940	[2]
Other investments	201		241
Total cost method equity investments	14,720		15,250
Life insurance cash surrender value	47,098		46,479
Net deferred tax asset	47,138		50,903
Limited partnership investments	17,445		18,673
Interest receivable	18,582		19,394
Prepaid assets	5,719		5,609
Other assets	9,872		10,150
Total other assets	$160,574		$166,458
[1]	A bank applying for membership in the Federal Reserve System is required to subscribe to stock in the Federal Reserve Bank of San Francisco (FRB) 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.
[2]	Borrowings from the FHLB must be supported by capital stock holdings. The minimum activity-based requirement is 4.7% of the outstanding advances. The requirement may be adjusted from time to time by the FHLB within limits established in the FHLB's Capital Plan.

Note_6_Other_Assets_Details_Am

Note 6 - Other Assets (Details) - Amounts Recognized in Net Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Amounts Recognized in Net Income [Abstract]
Investment loss included in pre-tax income	$675	$700
Tax credits recognized in provision for income taxes	$658	$771

Note_7_Goodwill_and_Identifiab2

Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Carrying Values of Goodwill (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Carrying Values of Goodwill [Abstract]
Goodwill	$121,673	$121,673

Note_7_Goodwill_and_Identifiab3

Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Gross Carrying Amount of Intangible Assets and Accumulated Amortization (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$67,108	$67,108
Accumulated Amortization	-53,822	-52,821
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	56,808	56,808
Accumulated Amortization	-44,116	-43,188
Mechant Draft Processing [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,300	10,300
Accumulated Amortization	($9,706)	($9,633)

Note_7_Goodwill_and_Identifiab4

Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Estimated Future Amortization Expense for Identifiable Intangible Assets (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Estimated Future Amortization Expense for Identifiable Intangible Assets [Line Items]
Three months ended March 31, 2015 (actual)	$1,001	$1,105
Estimate for year ended December 31, 2015	3,856
2016	3,504
2017	3,077
2018	1,921
2019	538
2020	287
Core Deposits [Member]
Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Estimated Future Amortization Expense for Identifiable Intangible Assets [Line Items]
Three months ended March 31, 2015 (actual)	928
Estimate for year ended December 31, 2015	3,594
2016	3,292
2017	2,913
2018	1,892
2019	538
2020	287
Mechant Draft Processing [Member]
Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Estimated Future Amortization Expense for Identifiable Intangible Assets [Line Items]
Three months ended March 31, 2015 (actual)	73
Estimate for year ended December 31, 2015	262
2016	212
2017	164
2018	$29

Note_8_Deposits_and_Borrowed_F2

Note 8 - Deposits and Borrowed Funds (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Note 8 - Deposits and Borrowed Funds (Details) [Line Items]
Demand Deposit Overdrafts	$3,073,000		$3,173,000
Interest Expense, Time Deposits, $100,000 or More	197,000	232,000
Short-term Debt	82,960,000		89,784,000
Pledged Financial Instruments, Not Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	115,411,000		148,014,000
Long-term Federal Home Loan Bank Advances			20,015,000
Long-term Line of Credit	0		0
Unsecured Line of Credit [Member]
Note 8 - Deposits and Borrowed Funds (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	35,000,000		35,000,000
Debt Instrument, Interest Rate, Stated Percentage	2.00%
Residential Real Estate Loans and Securities [Member]
Note 8 - Deposits and Borrowed Funds (Details) [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged			$26,484,000

Note_8_Deposits_and_Borrowed_F3

Note 8 - Deposits and Borrowed Funds (Details) - Deposits Detail (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Deposits Detail [Abstract]
Noninterest-bearing	$1,902,904	$1,910,781
Interest-bearing:
Transaction	787,633	792,448
Savings	1,313,007	1,260,819
Time deposits less than $100 thousand	165,412	169,959
Time deposits $100 thousand through $250 thousand	109,909	113,023
Time deposits more than $250 thousand	101,211	102,161
Total deposits	$4,380,076	$4,349,191

Note_9_Fair_Value_Measurements2

Note 9 - Fair Value Measurements (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Note 9 - Fair Value Measurements (Details) [Line Items]
Securities Selected For OTTI Analysis Market Price Threshold	95.00%
Securities Selected for OTTI Analysis Market to Book Ratio Threshold	95
Loans and Leases Receivable, Allowance	$31,187	$31,485	$32,109	$31,693
Purchased Covered Loans [Member]
Note 9 - Fair Value Measurements (Details) [Line Items]
Loans and Leases Receivable, Allowance	0			1,561
Fair Value Discount, Credit Default Risk, Purchased Loans	200	468
Purchased Non-Covered Loans [Member]
Note 9 - Fair Value Measurements (Details) [Line Items]
Loans and Leases Receivable, Allowance	2,339	2,120	2,574
Fair Value Discount, Credit Default Risk, Purchased Loans	$8,705	$9,372
Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) [Line Items]
Fair Value Inputs, Discount Rate	10.00%

Note_9_Fair_Value_Measurements3

Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	$1,777,320		$1,600,781
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	3,504		3,505
US Treasury Securities [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	3,504		3,505
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	633,608		635,188
US Government-sponsored Enterprises Debt Securities [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	633,608		635,188
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	24,298		26,407
Residential Mortgage Backed Securities [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	24,298		26,407
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	2,820		2,919
Commercial Mortgage Backed Securities [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	2,820		2,919
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	175,694		181,799
US States and Political Subdivisions Debt Securities [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	175,694		181,799
Residential Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	215,899		222,457
Residential Collateralized Mortgage Obligations [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	215,899		222,457
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	2,992		8,313
Asset-backed Securities [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	2,992		8,313
FHLMC And FNMA Stock [Member] | Fair Value, Inputs, Level 1 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	6,460		5,168
FHLMC And FNMA Stock [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	6,460	[1],[2]	5,168	[1],[2]
Domestic Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	709,257		512,239
Domestic Corporate Debt Securities [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	709,257		512,239
Other Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	906		910
Other Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	1,882		1,876
Other Securities [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	2,788		2,786
Fair Value, Inputs, Level 1 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	644,478		644,771
Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Recurring Basis [Line Items]
Investment securities available for sale	$1,132,842		$956,010
[1]	Federal Home Loan Mortgage Corporation
[2]	Federal National Mortgage Association

Note_9_Fair_Value_Measurements4

Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Fair Value	$25,353	$23,459
Total Losses	-243	-1,242
Fair Value, Inputs, Level 2 [Member] | Other Real Estate Owned [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Fair Value	9,233	6,374
Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Fair Value	6,753	7,670
Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Fair Value	15,986	14,044
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Fair Value	9,367	9,415
Fair Value, Inputs, Level 3 [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Fair Value	9,367	9,415
Other Real Estate Owned [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Fair Value	9,233	6,374
Total Losses	-243	-358
Impaired Loans [Member]
Note 9 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Fair Value	16,120	17,085
Total Losses		($884)

Note_9_Fair_Value_Measurements5

Note 9 - Fair Value Measurements (Details) - Fair Value Estimates for Financial Instruments, Excluding Financial Instruments Recorded at Fair Value on a Recurring Basis (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities held to maturity	$1,030,865	$1,048,562
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	247,450	380,836
Investment securities held to maturity	1,007	1,077
Financial Liabilities:
Federal Home Loan Bank advances		20,014
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities held to maturity	1,029,858	1,047,485
Financial Liabilities:
Deposits	4,003,544	3,964,048
Short-term borrowed funds	82,960	89,784
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans	1,665,928	1,685,048
Financial Liabilities:
Deposits	376,114	384,910
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	247,450	380,836
Investment securities held to maturity	1,015,231	1,038,658
Loans	1,652,697	1,668,805
Financial Liabilities:
Deposits	4,380,076	4,349,191
Short-term borrowed funds	82,960	89,784
Federal Home Loan Bank advances		20,015
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	247,450	380,836
Investment securities held to maturity	1,030,865	1,048,562
Loans	1,665,928	1,685,048
Financial Liabilities:
Deposits	4,379,658	4,348,958
Short-term borrowed funds	82,960	89,784
Federal Home Loan Bank advances		$20,014

Note_10_Commitments_and_Contin1

Note 10 - Commitments and Contingent Liabilities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Note 10 - Commitments and Contingent Liabilities (Details) [Line Items]
Unfunded Loan Commitments	$320,290	$312,694
Financial Standby Letter of Credit [Member]
Note 10 - Commitments and Contingent Liabilities (Details) [Line Items]
Letters of Credit Outstanding, Amount	27,490	29,002
Standby Letters of Credit [Member]
Note 10 - Commitments and Contingent Liabilities (Details) [Line Items]
Letters of Credit Outstanding, Amount	40	40
Other Liabilities [Member]
Note 10 - Commitments and Contingent Liabilities (Details) [Line Items]
Reserve for Unfunded Commitments	$2,693	$2,693

Note_11_Earnings_Per_Common_Sh2

Note 11 - Earnings Per Common Share (Details) (Equity Option [Member])	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Equity Option [Member]
Note 11 - Earnings Per Common Share (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,775	809

Note_11_Earnings_Per_Common_Sh3

Note 11 - Earnings Per Common Share (Details) - Earnings Per Common Share and Diluted Earnings Per Common Share (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Common Share and Diluted Earnings Per Common Share [Abstract]
Net income (numerator) (in Dollars)	$14,557	$15,307
Basic earnings per common share
Weighted average number of common shares outstanding - basic	25,651	26,433
Add common stock equivalents for options	4	104
Weighted average number of common shares outstanding - diluted (denominator)	25,655	26,537
Diluted earnings per common share (in Dollars per share)	$0.57	$0.58
Basic earnings per common share (in Dollars per share)	$0.57	$0.58