ServisFirst Bancshares (SFBS) 10-Q 1 May 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 27, 2018
Document Information [Line Items]
Entity Registrant Name	ServisFirst Bancshares, Inc.
Entity Central Index Key	1,430,723
Trading Symbol	sfbs
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Common Stock, Shares Outstanding (in shares)		53,147,169
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	[1]
ASSETS
Cash and due from banks	$ 64,912	$ 86,213
Interest-bearing balances due from depository institutions	53,311	151,849
Federal funds sold	197,882	239,524
Cash and cash equivalents	316,105	477,586
Available for sale debt securities, at fair value	560,635	538,080
Held to maturity debt securities (fair value of $250 at March 31, 2018 and December 31, 2017)	250	250
Equity securities	1,026	1,034
Mortgage loans held for sale	4,522	4,459
Loans	5,928,327	5,851,261
Less allowance for loan losses	(62,050)	(59,406)
Loans, net	5,866,277	5,791,855
Premises and equipment, net	58,624	58,900
Accrued interest and dividends receivable	20,261	20,661
Deferred tax assets, net	11,468	13,022
Other real estate owned and repossessed assets	5,748	6,701
Bank owned life insurance contracts	128,296	127,519
Goodwill and other identifiable intangible assets	14,652	14,719
Other assets	23,871	27,598
Total assets	7,011,735	7,082,384
Deposits:
Noninterest-bearing	1,407,592	1,440,326
Interest-bearing	4,569,795	4,651,348
Total deposits	5,977,387	6,091,674
Federal funds purchased	326,399	301,797
Other borrowings	64,739	64,832
Accrued interest payable	7,823	4,971
Other liabilities	6,090	11,506
Total liabilities	6,382,438	6,474,780
Stockholders' equity:
Common stock, par value $0.001 per share; 100,000,000 shares authorized; 53,147,169 shares issued and outstanding at March 31, 2018, and 52,992,586 shares issued and outstanding at December 31, 2017	53	53
Additional paid-in capital	217,536	217,693
Retained earnings	416,311	389,554
Accumulated other comprehensive loss	(5,105)	(198)
Total stockholders' equity attributable to ServisFirst Bancshares, Inc.	628,795	607,102
Noncontrolling interest	502	502
Total stockholders' equity	629,297	607,604
Total liabilities and stockholders' equity	7,011,735	7,082,384
Undesignated Preferred Stock [Member]
Stockholders' equity:
Preferred stock, par value $0.001 per share; 1,000,000 authorized and undesignated at March 31, 2018 and December 31, 2017
[1]	derived from audited financial statements

Consolidated Balance Sheets (C3

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	[1]
Held to maturity debt securities, fair value	$ 250	$ 250
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	100,000,000	100,000,000
Common stock, issued (in shares)	53,147,169	52,992,586
Common stock, outstanding (in shares)	53,147,169	52,992,586
Undesignated Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, undesignated (in shares)	1,000,000	1,000,000
[1]	derived from audited financial statements

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest income:
Interest and fees on loans	$ 69,674	$ 55,556
Taxable securities	2,745	2,087
Nontaxable securities	656	765
Federal funds sold	551	519
Other interest and dividends	383	590
Total interest income	74,009	59,517
Interest expense:
Deposits	9,621	5,982
Borrowed funds	1,952	1,483
Total interest expense	11,573	7,465
Net interest income	62,436	52,052
Provision for loan losses	4,139	4,986
Net interest income after provision for loan losses	58,297	47,066
Noninterest income:
Securities gains	4
Increase in cash surrender value life insurance	777	724
Other operating income	407	390
Total noninterest income	4,869	4,546
Non-interest expenses:
Salaries and employee benefits	13,296	11,713
Equipment and occupancy expense	1,954	2,250
Professional services	805	771
FDIC and other regulatory assessments	1,133	997
Other real estate owned expense	316	76
Other operating expenses	6,008	5,460
Total non-interest expenses	23,512	21,267
Income before income taxes	39,654	30,345
Provision for income taxes	7,051	7,826
Net income	32,603	22,519
Dividends on preferred stock
Net income available to common stockholders	$ 32,603	$ 22,519
Basic earnings per common share (in dollars per share)	$ 0.61	$ 0.43
Diluted earnings per common share (in dollars per share)	$ 0.60	$ 0.42
Deposit Account [Member]
Noninterest income:
Noninterest income	$ 1,585	$ 1,354
Mortgage Banking [Member]
Noninterest income:
Noninterest income	518	899
Credit Card [Member]
Noninterest income:
Noninterest income	$ 1,578	$ 1,179

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income	$ 32,603	$ 22,519
Other comprehensive (loss) income, net of tax:
Unrealized holding (losses) gains arising during period from securities available for sale, net of (benefit) tax of $(1,340) and $534 for 2018 and 2017, respectively	(4,910)	993
Reclassification adjustment for gains on sale of securities, net of tax of $1 for 2018	3
Other comprehensive (loss) income, net of tax	(4,907)	993
Comprehensive income	$ 27,696	$ 23,512

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Unrealized holding gain (loss) from available for sale securities, tax	$ (1,340)	$ 534
Reclassification adjustment for net gain (loss) on sale of securities, tax	$ 1

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2016		$ 53	$ 215,932	$ 307,151	$ (624)	$ 377	$ 522,889
Common dividends declared				(2,641)			(2,641)
Issue shares of common stock upon exercise of stock options			926				926
Issue shares of REIT preferred stock						125	125
Stock-based compensation expense			337				337
Other comprehensive income, net of tax					993		993
Net income				22,519			22,519
Balance at Mar. 31, 2017		53	217,195	327,029	369	502	545,148
Balance at Dec. 31, 2017		53	217,693	389,554	(198)	502	607,604	[1]
Common dividends declared				(5,846)			(5,846)
Issue shares of common stock upon exercise of stock options			852				852
Stock-based compensation expense			238				238
Other comprehensive income, net of tax					(4,907)		(4,907)
Net income				32,603			32,603
Shares of common stock withheld in net settlement upon exercise of stock options			(1,247)				(1,247)
Balance at Mar. 31, 2018		$ 53	$ 217,536	$ 416,311	$ (5,105)	$ 502	$ 629,297
[1]	derived from audited financial statements

Consolidated Statement of Stoc8

Consolidated Statement of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Dividend Declared [Member]
Common dividends, per share declared (in dollars per share)	$ 0.11	$ 0.05
Additional Paid-in Capital [Member]
Issuance of common stock, shares (in shares)	173,836	175,500
Shares withheld in net settlement upon exercise of stock options, shares (in shares)	30,003
Noncontrolling Interest [Member]
Issuance of REIT preferred stock, shares (in shares)		125

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES
Net income	$ 32,603,000	$ 22,519,000
Adjustments to reconcile net income to net cash provided by
Deferred tax expense (benefit)	1,554,000	(369,000)
Provision for loan losses	4,139,000	4,986,000
Depreciation	832,000	752,000
Accretion on acquired loans	(72,000)	(143,000)
Amortization of core deposit intangible	67,000	72,000
Net amortization of debt securities available for sale	623,000	1,001,000
Decrease (increase) in accrued interest and dividends receivable	400,000	(250,000)
Stock-based compensation expense	238,000	337,000
Increase (decrease) in accrued interest payable	2,852,000	(187,000)
Proceeds from sale of mortgage loans held for sale	24,720,000	32,501,000
Originations of mortgage loans held for sale	(24,265,000)	(33,526,000)
Gain on sale of debt securities available for sale	(4,000)
Gain on sale of mortgage loans held for sale	(518,000)	(899,000)
Net gain on sale of other real estate owned and repossessed assets		(36,000)
Write down of other real estate owned and repossessed assets	254,000
Operating losses (income) of tax credit partnerships	29,000	(22,000)
Increase in cash surrender value of life insurance contracts	(777,000)	(724,000)
Net change in other assets, liabilities, and other operating activities	(3,790,000)	3,202,000
Net cash provided by operating activities	38,885,000	29,214,000
INVESTMENT ACTIVITIES
Purchase of securities available for sale	(54,666,000)	(53,885,000)
Proceeds from maturities, calls and paydowns of securities available for sale	20,376,000	23,357,000
Proceeds from sale of debt securities available for sale	5,100,000
Purchase of securities held to maturity		(9,786,000)
Proceeds from maturities, calls and paydowns of securities held to maturity		293,000
Purchase of equity securities		(10,000)
Increase in loans	(78,664,000)	(243,562,000)
Purchase of premises and equipment	(556,000)	(6,844,000)
Proceeds from sale of other real estate owned and repossessed assets	874,000	426,000
Net cash used in investing activities	(107,536,000)	(290,011,000)
FINANCING ACTIVITIES
Net (decrease) increase in non-interest-bearing deposits	(32,734,000)	10,835,000
Net decrease in interest-bearing deposits	(81,553,000)	(69,614,000)
Net increase in federal funds purchased	24,602,000	2,297,000
Repayment of Federal Home Loan Bank advances	(100,000)	(100,000)
Proceeds from sale of preferred stock, net		125,000
Proceeds from exercise of stock options	852,000	926,000
Taxes paid in net settlement of tax obligation upon exercise of stock options	(1,247,000)
Dividends paid on common stock	(2,650,000)	(2,105,000)
Net cash used in financing activities	(92,830,000)	(57,636,000)
Net decrease in cash and cash equivalents	(161,481,000)	(318,433,000)
Cash and cash equivalents at beginning of period	477,586,000	783,997,000
Cash and cash equivalents at end of period	316,105,000	465,564,000
Cash paid for:
Interest	8,721,000	7,652,000
Income taxes	2,902,000	652,000
Income tax refund		(181,000)
NONCASH TRANSACTIONS
Other real estate acquired in settlement of loans	175,000	553,000
Internally financed sales of other real estate owned		49,000
Dividends declared	$ 5,846,000	$ 2,641,000

Note 1 - General

Note 1 - General	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	NOTE 1 The accompanying consolidated financial statements in this report have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission, including Regulation S- X 10 not not not may 10 December 31, 2017. All reported amounts are in thousands except share and per share data. Revenue Recognition Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers (“ASC 606” The majority of our revenue-generating transactions are excluded from the scope of ASC 606, 606, • Deposit account service charges – represent service fees for monthly activity and maintenance on customer accounts. Attributes can be transaction-based, item-based or time-based. Revenue is recognized when our performance obligation is completed which is generally monthly for maintenance services or when a transaction is processed. Payment for such performance obligations are generally received at the time the performance obligations are satisfied. • Credit card rewards program membership fees – represent memberships in our credit card rewards program and are paid annually by our cardholders at the time they open an account and on each anniversary. Revenue is recognized ratably over the membership period. Other non-interest income primarily includes income on bank owned life insurance contracts, letter of credit fees and gains on sale of loans held for sale, none 606.

Note 2 - Cash and Cash Equivale

Note 2 - Cash and Cash Equivalents	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	NOTE 2 Cash on hand, cash items in process of collection, amounts due from banks, and federal funds sold are included in cash and cash equivalents.

Note 3 - Earnings Per Common Sh

Note 3 - Earnings Per Common Share	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 3 Basic earnings per common share are computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per common share include the dilutive effect of additional potential common shares issuable under stock options. Three Months Ended March 31, 2018 2017 (In Thousands, Except Shares and Earnings per common share Weighted average common shares outstanding 53,082,322 52,745,335 Net income available to common stockholders $ 32,603 $ 22,519 Basic earnings per common share $ 0.61 $ 0.43 Weighted average common shares outstanding 53,082,322 52,745,335 Dilutive effects of assumed conversions and exercise of stock options and warrants 1,101,078 1,388,387 Weighted average common and dilutive potential common shares outstanding 54,183,400 54,133,722 Net income available to common stockholders $ 32,603 $ 22,519 Diluted earnings per common share $ 0.60 $ 0.42

Note 4 - Securities

Note 4 - Securities	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	NOTE 4 The amortized cost and fair value of available-for-sale and held-to-maturity securities at March 31, 2018 December 31, 2017 Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value March 31, 2018 (In Thousands) Available for sale debt securities U.S. Treasury and government sponsored agencies $ 58,025 $ 5 $ (777 ) $ 57,252 Mortgage-backed securities 294,582 609 (6,874 ) 288,318 State and municipal securities 123,123 522 (856 ) 122,789 Corporate debt 91,409 1,376 (509 ) 92,276 Total $ 567,139 $ 2,512 $ (9,016 ) $ 560,635 Held to maturity debt securities State and municipal securities $ 250 $ - $ - $ 250 Total $ 250 $ - $ - $ 250 December 31, 2017 Available for sale debt securities U.S. Treasury and government sponsored agencies $ 55,567 $ 38 $ (249 ) $ 55,356 Mortgage-backed securities 278,177 1,006 (2,685 ) 276,498 State and municipal securities 134,641 761 (553 ) 134,849 Corporate debt 69,996 1,416 (35 ) 71,377 Total $ 538,381 $ 3,221 $ (3,522 ) $ 538,080 Held to maturity debt securities State and municipal securities $ 250 $ - $ - $ 250 Total $ 250 $ - $ - $ 250 The amortized cost and fair value of debt securities as of March 31, 2018 December 31, 2017 may may not March 31, 2018 December 31, 2017 Amortized Fair Amortized Fair (In thousands) Available for sale debt securities Due within one year $ 45,864 $ 45,909 $ 22,122 $ 22,172 Due from one to five years 194,445 193,930 160,773 160,563 Due from five to ten years 29,371 29,472 73,362 74,684 Due after ten years 2,877 3,006 3,947 4,163 Mortgage-backed securities 294,582 288,318 278,177 276,498 $ 567,139 $ 560,635 $ 538,381 $ 538,080 Held to maturity debt securities Due from one to five years $ 250 $ 250 $ 250 $ 250 $ 250 $ 250 $ 250 $ 250 All mortgage-backed securities are with government-sponsored enterprises (GSEs) such as Federal National Mortgage Association, Government National Mortgage Association, Federal Home Loan Bank, and Federal Home Loan Mortgage Corporation. The following table identifies, as of March 31, 2018 December 31, 2017, 12 12 March 31, 2018, 73 797 12 not not not may not March 31, 2018. not Less Than Twelve Months Twelve Months or More Total Gross Gross Gross Unrealized Unrealized Unrealized Losses Fair Value Losses Fair Value Losses Fair Value (In Thousands) March 31, 2018: U.S. Treasury and government sponsored agencies $ (635 ) $ 54,191 $ (142 ) $ 2,881 $ (777 ) $ 57,072 Mortgage-backed securities (4,046 ) 200,071 (2,828 ) 71,042 (6,874 ) 271,113 State and municipal securities (716 ) 64,676 (140 ) 6,642 (856 ) 71,318 Corporate debt (509 ) 26,389 - - (509 ) 26,389 Total $ (5,906 ) $ 345,327 $ (3,110 ) $ 80,565 $ (9,016 ) $ 425,892 December 31, 2017: U.S. Treasury and government sponsored agencies $ (151 ) $ 33,401 $ (98 ) $ 2,926 $ (249 ) $ 36,327 Mortgage-backed securities (986 ) 140,432 (1,699 ) 75,903 (2,685 ) 216,335 State and municipal securities (450 ) 66,637 (103 ) 6,648 (553 ) 73,285 Corporate debt (35 ) 6,955 - - (35 ) 6,955 Total $ (1,622 ) $ 247,425 $ (1,900 ) $ 85,477 $ (3,522 ) $ 332,902

Note 5 - Loans

Note 5 - Loans	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	NOTE 5 The following table details the Company’s loans at March 31, 2018 December 31, 2017: March 31, December 31, 2018 2017 (Dollars In Thousands) Commercial, financial and agricultural $ 2,329,904 $ 2,279,366 Real estate - construction 506,050 580,874 Real estate - mortgage: Owner-occupied commercial 1,349,679 1,328,666 1-4 family mortgage 581,498 603,063 Other mortgage 1,099,482 997,079 Subtotal: Real estate - mortgage 3,030,659 2,928,808 Consumer 61,714 62,213 Total Loans 5,928,327 5,851,261 Less: Allowance for loan losses (62,050 ) (59,406 ) Net Loans $ 5,866,277 $ 5,791,855 Commercial, financial and agricultural 39.30 % 38.96 % Real estate - construction 8.54 % 9.93 % Real estate - mortgage: Owner-occupied commercial 22.77 % 22.71 % 1-4 family mortgage 9.81 % 10.30 % Other mortgage 18.54 % 17.04 % Subtotal: Real estate - mortgage 51.12 % 50.05 % Consumer 1.04 % 1.06 % Total Loans 100.00 % 100.00 % The credit quality of the loan portfolio is summarized no • Pass – loans which are well protected by the current net worth and paying capacity of the obligor(s) or by the fair value, less cost to acquire and sell, of any underlying collateral. • Special Mention – loans with potential weakness that may, not not not • Substandard – loans that exhibit well-defined weakness or weaknesses that presently jeopardize debt repayment. These loans are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not • Doubtful – loans that have all the weaknesses inherent in loans classified substandard, plus the added characteristic that the weaknesses make collection or liquidation in full on the basis of currently existing facts, conditions, and values highly questionable and improbable. Loans by credit quality indicator as of March 31, 2018 December 31, 2017 Special March 31, 2018 Pass Mention Substandard Doubtful Total (In Thousands) Commercial, financial and agricultural $ 2,272,468 $ 32,900 $ 24,536 $ - $ 2,329,904 Real estate - construction 497,846 6,623 1,581 - 506,050 Real estate - mortgage: Owner-occupied commercial 1,338,307 7,401 3,971 - 1,349,679 1-4 family mortgage 576,792 1,599 3,107 - 581,498 Other mortgage 1,078,797 13,732 6,953 - 1,099,482 Total real estate - mortgage 2,993,896 22,732 14,031 - 3,030,659 Consumer 61,623 4 87 - 61,714 Total $ 5,825,833 $ 62,259 $ 40,235 $ - $ 5,928,327 Special December 31, 2017 Pass Mention Substandard Doubtful Total (In Thousands) Commercial, financial and agricultural $ 2,225,084 $ 27,835 $ 26,447 $ - $ 2,279,366 Real estate - construction 572,657 6,691 1,526 - 580,874 Real estate - mortgage: Owner-occupied commercial 1,317,113 7,333 4,220 - 1,328,666 1-4 family mortgage 598,222 1,599 3,242 - 603,063 Other mortgage 976,348 18,122 2,609 - 997,079 Total real estate - mortgage 2,891,683 27,054 10,071 - 2,928,808 Consumer 62,083 42 88 - 62,213 Total $ 5,751,507 $ 61,622 $ 38,132 $ - $ 5,851,261 Loans by performance status as of March 31, 2018 December 31, 2017 March 31, 2018 Performing Nonperforming Total (In Thousands) Commercial, financial and agricultural $ 2,320,887 $ 9,017 $ 2,329,904 Real estate - construction 506,050 - 506,050 Real estate - mortgage: Owner-occupied commercial 1,349,373 306 1,349,679 1-4 family mortgage 580,953 545 581,498 Other mortgage 1,099,482 - 1,099,482 Total real estate - mortgage 3,029,808 851 3,030,659 Consumer 61,633 81 61,714 Total $ 5,918,378 $ 9,949 $ 5,928,327 December 31, 2017 Performing Nonperforming Total (In Thousands) Commercial, financial and agricultural $ 2,269,642 $ 9,724 $ 2,279,366 Real estate - construction 580,874 - 580,874 Real estate - mortgage: Owner-occupied commercial 1,328,110 556 1,328,666 1-4 family mortgage 602,604 459 603,063 Other mortgage 997,079 - 997,079 Total real estate - mortgage 2,927,793 1,015 2,928,808 Consumer 62,127 86 62,213 Total $ 5,840,436 $ 10,825 $ 5,851,261 Loans by past due status as of March 31, 2018 December 31, 2017 March 31, 2018 Past Due Status (Accruing Loans) Total Past 30-59 Days 60-89 Days 90+ Days Due Non-Accrual Current Total Loans (In Thousands) Commercial, financial and agricultural $ 309 $ 10,495 $ 418 $ 11,222 $ 8,599 $ 2,310,083 $ 2,329,904 Real estate - construction - 7,619 - 7,619 - 498,431 506,050 Real estate - mortgage: Owner-occupied commercial 115 3,664 - 3,779 306 1,345,594 1,349,679 1-4 family mortgage 564 1,365 217 2,146 328 579,024 581,498 Other mortgage 381 14,827 - 15,208 - 1,084,274 1,099,482 Total real estate - mortgage 1,060 19,856 217 21,133 634 3,008,892 3,030,659 Consumer 19 24 43 86 38 61,590 61,714 Total $ 1,388 $ 37,994 $ 678 $ 40,060 $ 9,271 $ 5,878,996 $ 5,928,327 December 31, 2017 Past Due Status (Accruing Loans) Total Past 30-59 Days 60-89 Days 90+ Days Due Non-Accrual Current Total Loans (In Thousands) Commercial, financial and agricultural $ 1,410 $ 5,702 $ 12 $ 7,124 $ 9,712 $ 2,262,530 $ 2,279,366 Real estate - construction 56 997 - 1,053 - 579,821 580,874 Real estate - mortgage: Owner-occupied commercial - 3,664 - 3,664 556 1,324,446 1,328,666 1-4 family mortgage 430 850 - 1,280 459 601,324 603,063 Other mortgage 5,116 - - 5,116 - 991,963 997,079 Total real estate - mortgage 5,546 4,514 - 10,060 1,015 2,917,733 2,928,808 Consumer 131 23 48 202 38 61,973 62,213 Total $ 7,143 $ 11,236 $ 60 $ 18,439 $ 10,765 $ 5,822,057 $ 5,851,261 The allowance for loan losses is maintained at a level which, in management’s judgment, is adequate to absorb credit losses inherent in the loan portfolio. The amount of the allowance is based on management’s evaluation of the collectability of the loan portfolio, including the nature of the portfolio, credit concentrations, trends in historical loss experience, specific impaired loans, economic conditions, and other risks inherent in the portfolio. Allowances for impaired loans are generally determined based on collateral values or the present value of the estimated cash flows. The allowance is increased by a provision for loan losses, which is charged to expense, and reduced by charge-offs, net of recoveries. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the allowance for losses on loans. Such agencies may The methodology utilized for the calculation of the allowance for loan losses is divided into four 450 310 Non-Impaired Loans. second five Impaired Loans. may may External Qualitative Factors three Internal Qualitative Factors The following table presents an analysis of the allowance for loan losses by portfolio segment and changes in the allowance for loan losses for the three March 31, 2018 March 31, 2017. Commercial, financial and Real estate - Real estate - agricultural construction mortgage Consumer Total (In Thousands) Three Months Ended March 31, 2018 Allowance for loan losses: Balance at December 31, 2017 $ 32,880 $ 4,989 $ 21,022 $ 515 $ 59,406 Charge-offs (1,088 ) - (381 ) (88 ) (1,557 ) Recoveries 4 7 42 9 62 Provision 3,991 (858 ) 923 83 4,139 Balance at March 31, 2018 $ 35,787 $ 4,138 $ 21,606 $ 519 $ 62,050 Three Months Ended March 31, 2017 Allowance for loan losses: Balance at December 31, 2016 $ 28,872 $ 5,125 $ 17,504 $ 392 $ 51,893 Charge-offs (2,855 ) - (266 ) (75 ) (3,196 ) Recoveries 190 16 2 1 209 Provision 2,500 (316 ) 2,722 80 4,986 Balance at March 31, 2017 $ 28,707 $ 4,825 $ 19,962 $ 398 $ 53,892 As of March 31, 2018 Allowance for loan losses: Individually Evaluated for Impairment $ 5,877 $ 120 $ 432 $ 49 $ 6,478 Collectively Evaluated for Impairment 29,910 4,018 21,174 470 55,572 Loans: Ending Balance $ 2,329,904 $ 506,050 $ 3,030,659 $ 61,714 $ 5,928,327 Individually Evaluated for Impairment 24,536 1,625 16,328 87 42,576 Collectively Evaluated for Impairment 2,305,368 504,425 3,014,331 61,627 5,885,751 As of December 31, 2017 Allowance for loan losses: Individually Evaluated for Impairment $ 4,276 $ 120 $ 1,163 $ 50 $ 5,609 Collectively Evaluated for Impairment 28,604 4,869 19,859 465 53,797 Loans: Ending Balance $ 2,279,366 $ 580,874 $ 2,928,808 $ 62,213 $ 5,851,261 Individually Evaluated for Impairment 26,447 1,571 12,404 88 40,510 Collectively Evaluated for Impairment 2,252,919 579,303 2,916,404 62,125 5,810,751 The following table presents details of the Company’s impaired loans as of March 31, 2018 December 31, 2017, not March 31, 2018 For the three months ended March 31, 2018 Interest Unpaid Average Income Recorded Principal Related Recorded Recognized Investment Balance Allowance Investment in Period (In Thousands) With no allowance recorded: Commercial, financial and agricultural $ 6,176 $ 6,953 $ - $ 6,165 $ 71 Real estate - construction 628 631 - 632 8 Real estate - mortgage: Owner-occupied commercial 2,604 2,771 - 2,789 38 1-4 family mortgage 2,258 2,258 - 2,256 25 Other mortgage 5,090 5,090 - 5,114 63 Total real estate - mortgage 9,952 10,119 - 10,159 126 Consumer 38 38 - 39 1 Total with no allowance recorded 16,794 17,741 - 16,995 206 With an allowance recorded: Commercial, financial and agricultural 18,360 25,182 5,877 19,809 147 Real estate - construction 997 997 120 997 14 Real estate - mortgage: Owner-occupied commercial 3,664 3,664 - 3,664 50 1-4 family mortgage 850 850 151 850 12 Other mortgage 1,862 1,862 281 1,862 20 Total real estate - mortgage 6,376 6,376 432 6,376 82 Consumer 49 49 49 50 1 Total with allowance recorded 25,782 32,604 6,478 27,232 244 Total Impaired Loans: Commercial, financial and agricultural 24,536 32,135 5,877 25,974 218 Real estate - construction 1,625 1,628 120 1,629 22 Real estate - mortgage: Owner-occupied commercial 6,268 6,435 - 6,453 88 1-4 family mortgage 3,108 3,108 151 3,106 37 Other mortgage 6,952 6,952 281 6,976 83 Total real estate - mortgage 16,328 16,495 432 16,535 208 Consumer 87 87 49 89 2 Total impaired loans $ 42,576 $ 50,345 $ 6,478 $ 44,227 $ 450 December 31, 2017 For the twelve months ended December 31, 2017 Interest Unpaid Average Income Recorded Principal Related Recorded Recognized Investment Balance Allowance Investment In Period (In Thousands) With no allowance recorded: Commercial, financial and agricultural $ 10,036 $ 16,639 $ - $ 16,417 $ 571 Real estate - construction 574 577 - 663 31 Real estate - mortgage: Owner-occupied commercial 2,640 2,806 - 2,875 159 1-4 family mortgage 2,262 2,262 - 2,289 93 Other mortgage 746 746 - 727 44 Total real estate - mortgage 5,648 5,814 - 5,891 296 Consumer 38 39 - 42 3 Total with no allowance recorded 16,296 23,069 - 23,013 901 With an allowance recorded: Commercial, financial and agricultural 16,411 16,992 4,276 17,912 651 Real estate - construction 997 997 120 997 56 Real estate - mortgage: Owner-occupied commercial 3,914 3,914 601 3,801 215 1-4 family mortgage 980 980 281 1,113 54 Other mortgage 1,862 1,862 281 1,862 80 Total real estate - mortgage 6,756 6,756 1,163 6,776 349 Consumer 50 50 50 42 3 Total with allowance recorded 24,214 24,795 5,609 25,727 1,059 Total Impaired Loans: Commercial, financial and agricultural 26,447 33,631 4,276 34,329 1,222 Real estate - construction 1,571 1,574 120 1,660 87 Real estate - mortgage: Owner-occupied commercial 6,554 6,720 601 6,676 374 1-4 family mortgage 3,242 3,242 281 3,402 147 Other mortgage 2,608 2,608 281 2,589 124 Total real estate - mortgage 12,404 12,570 1,163 12,667 645 Consumer 88 89 50 84 6 Total impaired loans $ 40,510 $ 47,864 $ 5,609 $ 48,740 $ 1,960 Troubled Debt Restructurings (“TDR”) at March 31, 2018, December 31, 2017 March 31, 2017 $18.8 $20.6 $7.3 March 31, 2018, $5.1 $4.3 December 31, 2017 $2.3 March 31, 2017. no three March 31, 2018 2017. No twelve twelve three March 31, 2018 2017. 90

Note 6 - Employee and Director

Note 6 - Employee and Director Benefits	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	NOTE 6 Stock Options At March 31, 2018, $238,000 $337,000 three March 31, 2018 2017, The Company’s 2005 6,150,000 2009 5,550,000 ten The Company estimates the fair value of each stock option award using a Black-Scholes-Merton valuation model which incorporates the assumptions noted in the following table. Expected volatilities are based on an index of southeastern United States publicly traded banks. The expected term for options granted is based on the short-cut method and represents the period of time that options granted are expected to be outstanding. The risk-free rate for periods within the contractual life of the option is based on the U. S. Treasury yield curve in effect at the time of grant. 2018 2017 Expected volatility 23.43 % 29.00 % Expected dividends 1.07 % 0.43 % Expected term (in years) 6 6 Risk-free rate 2.67 % 2.08 % The weighted average grant-date fair value of options granted during the three March 31, 2018 2017 $10.41 $11.91, The following table summarizes stock option activity during the three March 31, 2018 2017: Weighted Weighted Average Average Remaining Exercise Contractual Aggregate Shares Price Term (years) Intrinsic Value (In Thousands) Three Months Ended March 31, 2018: Outstanding at January 1, 2018 1,666,834 $ 10.68 5.5 $ 51,377 Granted 10,250 41.21 9.9 (4 ) Exercised (173,836 ) 4.90 3.4 6,244 Forfeited (1,000 ) 25.41 8.5 15 Outstanding at March 31, 2018 1,502,248 11.54 5.5 $ 43,978 Exercisable at March 31, 2018 672,600 $ 5.48 3.9 $ 23,770 Three Months Ended March 31, 2017: Outstanding at January 1, 2017 2,026,334 $ 9.00 6.2 $ 57,636 Granted 51,500 38.10 9.8 (89 ) Exercised (175,500 ) 5.28 5.0 5,459 Forfeited (27,000 ) 21.55 8.8 401 Outstanding at March 31, 2017 1,875,334 9.96 6.2 $ 49,540 Exercisable at March 31, 2017 928,236 $ 5.12 4.6 $ 29,013 As of March 31, 2018, $1,847,000 2.4 Restricted Stock The Company periodically grants restricted stock awards that vest upon service conditions. Dividend payments are made during the vesting period. The value of restricted stock is determined to be the current value of the Company’s stock, and this total value will be recognized as compensation expense over the vesting period. As of March 31, 2018, $841,000 March 31, 2018, 1.6

Note 7 - Derivatives

Note 7 - Derivatives	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]	NOTE 7 The Company has entered into agreements with secondary market investors to deliver loans on a “best efforts delivery” basis. When a rate is committed to a borrower, it is based on the best price that day and locked with the investor for the customer for a 30 not no March 31, 2018 December 31, 2017 not

Note 8 - Recently Adopted Accou

Note 8 - Recently Adopted Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	NOTE 8 In February 2018, 2018 02, Income Statement - Reporting Comprehensive Income 220 Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income 2017. December 15, 2018 December 31, 2017. $43,000 21% In May 2014, 2014 09, Revenue from Contracts with Customers (Topic 606 January 1, 2018. 2014 09 not not 2014 09. 2014 09, not not In January 2016, 2016 01, Financial Instruments Overall (Topic 825 2016 01: January 1, 2018. no 10

Note 9 - Recent Accounting Pron

Note 9 - Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Accounting Changes and Error Corrections [Text Block]	NOTE 9 In February 2016, 2016 02, Leases (Topic 842 December 15, 2018. January 2018, not 2016 02 In June 2016, 2016 13, Financial Instruments-Credit Losses (Topic 326 December 15, 2019, December 15, 2018. third In March 2017, 2017 08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310 20 not December 15, 2018. not first

Note 10 - Fair Value Measuremen

Note 10 - Fair Value Measurement	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Fair Value Disclosures [Text Block]	NOTE 10 Measurement of fair value under U.S. GAAP establishes a hierarchy that prioritizes observable and unobservable inputs used to measure fair value, as of the measurement date, into three Level 1: Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 Level 2: Observable prices that are based on inputs not Level 3: Unobservable inputs are used when little or no 3 In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible and also considers counterparty credit risk in its assessment of fair value. Debt Securities. 1 1 not may 2 1 2 not 3 Impaired Loans not not 820 10 3 $2,345,000 three March 31, 2018, $2,978,000 three March 31, 2017. Other Real Estate Owned not 3 $254,000 $30,000 three March 31, 2018 2017, 3 There was one $175,000 March 31, 2018 none December 31, 2017. No March 31, 2018 December 31, 2017. The following table presents the Company’s financial assets and financial liabilities carried at fair value on a recurring basis as of March 31, 2018 December 31, 2017: Fair Value Measurements at March 31, 2018 Using Quoted Prices in Active Markets Significant Other Significant for Identical Observable Inputs Unobservable Assets (Level 1) (Level 2) Inputs (Level 3) Total Assets Measured on a Recurring Basis: (In Thousands) Available for sale debt securities: U.S. Treasury and government sponsored agencies $ - $ 57,252 $ - $ 57,252 Mortgage-backed securities - 288,318 - 288,318 State and municipal securities - 122,789 - 122,789 Corporate debt - 85,673 6,603 92,276 Total assets at fair value $ - $ 554,032 $ 6,603 $ 560,635 Fair Value Measurements at December 31, 2017 Using Quoted Prices in Active Markets Significant Other Significant for Identical Observable Inputs Unobservable Assets (Level 1) (Level 2) Inputs (Level 3) Total Assets Measured on a Recurring Basis: (In Thousands) Available for sale debt securities: U.S. Treasury and government sponsored agencies $ - $ 55,356 $ - $ 55,356 Mortgage-backed securities - 276,498 - 276,498 State and municipal securities - 134,849 - 134,849 Corporate debt - 64,877 6,500 71,377 Total assets at fair value $ - $ 531,580 $ 6,500 $ 538,080 The following table presents the Company’s financial assets and financial liabilities carried at fair value on a nonrecurring basis as of March 31, 2018 December 31, 2017: Fair Value Measurements at March 31, 2018 Using Quoted Prices in Active Markets Significant Other Significant for Identical Observable Unobservable Assets (Level 1) Inputs (Level 2) Inputs (Level 3) Total Assets Measured on a Nonrecurring Basis: (In Thousands) Impaired loans $ - $ - $ 36,098 $ 36,098 Other real estate owned and repossessed assets - - 5,748 5,748 Total assets at fair value $ - $ - $ 41,846 $ 41,846 Fair Value Measurements at December 31, 2017 Using Quoted Prices in Active Markets Significant Other Significant for Identical Observable Unobservable Assets (Level 1) Inputs (Level 2) Inputs (Level 3) Total Assets Measured on a Nonrecurring Basis: (In Thousands) Impaired loans $ - $ - $ 34,901 $ 34,901 Other real estate owned - - 6,701 6,701 Total assets at fair value $ - $ - $ 41,602 $ 41,602 The fair value of a financial instrument is the current amount that would be exchanged in a sale between willing parties, other than in a forced liquidation. Fair value is best determined based upon quoted market prices. However, in many instances, there are no not may not may not The following methods and assumptions were used by the Company in estimating its fair value disclosures for financial instruments: Debt securities: 1 1 not may 2 1 2 not 3 Equity securities: 1 Mortgage loans held for sale: 30 Bank owned life insurance contracts: The carrying amount, estimated fair value, and placement in the fair value hierarchy of the Company’s financial instruments as of March 31, 2018 December 31, 2017 not March 31, 2018 December 31, 2017 Carrying Carrying Amount Fair Value Amount Fair Value (In Thousands) Financial Assets: Level 1 inputs: Cash and due from banks $ 118,223 $ 118,223 $ 238,062 $ 238,062 Level 2 inputs: Available for sale debt securities $ 554,032 $ 554,032 $ 531,580 $ 531,580 Equity securities 1,026 1,026 1,034 1,034 Federal funds sold 197,882 197,882 239,524 239,524 Mortgage loans held for sale 4,522 4,522 4,459 4,459 Bank owned life insurance contracts 128,296 128,296 127,519 127,519 Level 3 Inputs: Available for sale debt securities $ 6,603 $ 6,603 $ 6,500 $ 6,500 Held to maturity debt securities 250 250 250 250 Loans, net 5,830,178 5,769,403 5,756,954 5,712,441 Financial Liabilities: Level 2 inputs: Deposits $ 5,977,387 $ 5,969,531 $ 6,091,674 $ 6,086,085 Federal funds purchased 326,399 326,399 301,797 301,797 Other borrowings 64,739 65,799 64,832 65,921

Note 11 - Subsequent Events

Note 11 - Subsequent Events	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 11 The Company has evaluated all subsequent events through the date of this filing to ensure that this Form 10 March 31, 2018, March 31, 2018 not no

Note 3 - Earnings Per Common 21

Note 3 - Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended March 31, 2018 2017 (In Thousands, Except Shares and Earnings per common share Weighted average common shares outstanding 53,082,322 52,745,335 Net income available to common stockholders $ 32,603 $ 22,519 Basic earnings per common share $ 0.61 $ 0.43 Weighted average common shares outstanding 53,082,322 52,745,335 Dilutive effects of assumed conversions and exercise of stock options and warrants 1,101,078 1,388,387 Weighted average common and dilutive potential common shares outstanding 54,183,400 54,133,722 Net income available to common stockholders $ 32,603 $ 22,519 Diluted earnings per common share $ 0.60 $ 0.42

Note 4 - Securities (Tables)

Note 4 - Securities (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Unrealized Gain (Loss) on Investments [Table Text Block]	Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value March 31, 2018 (In Thousands) Available for sale debt securities U.S. Treasury and government sponsored agencies $ 58,025 $ 5 $ (777 ) $ 57,252 Mortgage-backed securities 294,582 609 (6,874 ) 288,318 State and municipal securities 123,123 522 (856 ) 122,789 Corporate debt 91,409 1,376 (509 ) 92,276 Total $ 567,139 $ 2,512 $ (9,016 ) $ 560,635 Held to maturity debt securities State and municipal securities $ 250 $ - $ - $ 250 Total $ 250 $ - $ - $ 250 December 31, 2017 Available for sale debt securities U.S. Treasury and government sponsored agencies $ 55,567 $ 38 $ (249 ) $ 55,356 Mortgage-backed securities 278,177 1,006 (2,685 ) 276,498 State and municipal securities 134,641 761 (553 ) 134,849 Corporate debt 69,996 1,416 (35 ) 71,377 Total $ 538,381 $ 3,221 $ (3,522 ) $ 538,080 Held to maturity debt securities State and municipal securities $ 250 $ - $ - $ 250 Total $ 250 $ - $ - $ 250
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	March 31, 2018 December 31, 2017 Amortized Fair Amortized Fair (In thousands) Available for sale debt securities Due within one year $ 45,864 $ 45,909 $ 22,122 $ 22,172 Due from one to five years 194,445 193,930 160,773 160,563 Due from five to ten years 29,371 29,472 73,362 74,684 Due after ten years 2,877 3,006 3,947 4,163 Mortgage-backed securities 294,582 288,318 278,177 276,498 $ 567,139 $ 560,635 $ 538,381 $ 538,080 Held to maturity debt securities Due from one to five years $ 250 $ 250 $ 250 $ 250 $ 250 $ 250 $ 250 $ 250
Gain (Loss) on Securities [Table Text Block]	Less Than Twelve Months Twelve Months or More Total Gross Gross Gross Unrealized Unrealized Unrealized Losses Fair Value Losses Fair Value Losses Fair Value (In Thousands) March 31, 2018: U.S. Treasury and government sponsored agencies $ (635 ) $ 54,191 $ (142 ) $ 2,881 $ (777 ) $ 57,072 Mortgage-backed securities (4,046 ) 200,071 (2,828 ) 71,042 (6,874 ) 271,113 State and municipal securities (716 ) 64,676 (140 ) 6,642 (856 ) 71,318 Corporate debt (509 ) 26,389 - - (509 ) 26,389 Total $ (5,906 ) $ 345,327 $ (3,110 ) $ 80,565 $ (9,016 ) $ 425,892 December 31, 2017: U.S. Treasury and government sponsored agencies $ (151 ) $ 33,401 $ (98 ) $ 2,926 $ (249 ) $ 36,327 Mortgage-backed securities (986 ) 140,432 (1,699 ) 75,903 (2,685 ) 216,335 State and municipal securities (450 ) 66,637 (103 ) 6,648 (553 ) 73,285 Corporate debt (35 ) 6,955 - - (35 ) 6,955 Total $ (1,622 ) $ 247,425 $ (1,900 ) $ 85,477 $ (3,522 ) $ 332,902

Note 5 - Loans (Tables)

Note 5 - Loans (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	March 31, December 31, 2018 2017 (Dollars In Thousands) Commercial, financial and agricultural $ 2,329,904 $ 2,279,366 Real estate - construction 506,050 580,874 Real estate - mortgage: Owner-occupied commercial 1,349,679 1,328,666 1-4 family mortgage 581,498 603,063 Other mortgage 1,099,482 997,079 Subtotal: Real estate - mortgage 3,030,659 2,928,808 Consumer 61,714 62,213 Total Loans 5,928,327 5,851,261 Less: Allowance for loan losses (62,050 ) (59,406 ) Net Loans $ 5,866,277 $ 5,791,855 Commercial, financial and agricultural 39.30 % 38.96 % Real estate - construction 8.54 % 9.93 % Real estate - mortgage: Owner-occupied commercial 22.77 % 22.71 % 1-4 family mortgage 9.81 % 10.30 % Other mortgage 18.54 % 17.04 % Subtotal: Real estate - mortgage 51.12 % 50.05 % Consumer 1.04 % 1.06 % Total Loans 100.00 % 100.00 %
Financing Receivable Credit Quality Indicators [Table Text Block]	Special March 31, 2018 Pass Mention Substandard Doubtful Total (In Thousands) Commercial, financial and agricultural $ 2,272,468 $ 32,900 $ 24,536 $ - $ 2,329,904 Real estate - construction 497,846 6,623 1,581 - 506,050 Real estate - mortgage: Owner-occupied commercial 1,338,307 7,401 3,971 - 1,349,679 1-4 family mortgage 576,792 1,599 3,107 - 581,498 Other mortgage 1,078,797 13,732 6,953 - 1,099,482 Total real estate - mortgage 2,993,896 22,732 14,031 - 3,030,659 Consumer 61,623 4 87 - 61,714 Total $ 5,825,833 $ 62,259 $ 40,235 $ - $ 5,928,327 Special December 31, 2017 Pass Mention Substandard Doubtful Total (In Thousands) Commercial, financial and agricultural $ 2,225,084 $ 27,835 $ 26,447 $ - $ 2,279,366 Real estate - construction 572,657 6,691 1,526 - 580,874 Real estate - mortgage: Owner-occupied commercial 1,317,113 7,333 4,220 - 1,328,666 1-4 family mortgage 598,222 1,599 3,242 - 603,063 Other mortgage 976,348 18,122 2,609 - 997,079 Total real estate - mortgage 2,891,683 27,054 10,071 - 2,928,808 Consumer 62,083 42 88 - 62,213 Total $ 5,751,507 $ 61,622 $ 38,132 $ - $ 5,851,261
Financing Receivable, Credit Substitute, Credit Quality Indicator [Table Text Block]	March 31, 2018 Performing Nonperforming Total (In Thousands) Commercial, financial and agricultural $ 2,320,887 $ 9,017 $ 2,329,904 Real estate - construction 506,050 - 506,050 Real estate - mortgage: Owner-occupied commercial 1,349,373 306 1,349,679 1-4 family mortgage 580,953 545 581,498 Other mortgage 1,099,482 - 1,099,482 Total real estate - mortgage 3,029,808 851 3,030,659 Consumer 61,633 81 61,714 Total $ 5,918,378 $ 9,949 $ 5,928,327 December 31, 2017 Performing Nonperforming Total (In Thousands) Commercial, financial and agricultural $ 2,269,642 $ 9,724 $ 2,279,366 Real estate - construction 580,874 - 580,874 Real estate - mortgage: Owner-occupied commercial 1,328,110 556 1,328,666 1-4 family mortgage 602,604 459 603,063 Other mortgage 997,079 - 997,079 Total real estate - mortgage 2,927,793 1,015 2,928,808 Consumer 62,127 86 62,213 Total $ 5,840,436 $ 10,825 $ 5,851,261
Past Due Financing Receivables [Table Text Block]	March 31, 2018 Past Due Status (Accruing Loans) Total Past 30-59 Days 60-89 Days 90+ Days Due Non-Accrual Current Total Loans (In Thousands) Commercial, financial and agricultural $ 309 $ 10,495 $ 418 $ 11,222 $ 8,599 $ 2,310,083 $ 2,329,904 Real estate - construction - 7,619 - 7,619 - 498,431 506,050 Real estate - mortgage: Owner-occupied commercial 115 3,664 - 3,779 306 1,345,594 1,349,679 1-4 family mortgage 564 1,365 217 2,146 328 579,024 581,498 Other mortgage 381 14,827 - 15,208 - 1,084,274 1,099,482 Total real estate - mortgage 1,060 19,856 217 21,133 634 3,008,892 3,030,659 Consumer 19 24 43 86 38 61,590 61,714 Total $ 1,388 $ 37,994 $ 678 $ 40,060 $ 9,271 $ 5,878,996 $ 5,928,327 December 31, 2017 Past Due Status (Accruing Loans) Total Past 30-59 Days 60-89 Days 90+ Days Due Non-Accrual Current Total Loans (In Thousands) Commercial, financial and agricultural $ 1,410 $ 5,702 $ 12 $ 7,124 $ 9,712 $ 2,262,530 $ 2,279,366 Real estate - construction 56 997 - 1,053 - 579,821 580,874 Real estate - mortgage: Owner-occupied commercial - 3,664 - 3,664 556 1,324,446 1,328,666 1-4 family mortgage 430 850 - 1,280 459 601,324 603,063 Other mortgage 5,116 - - 5,116 - 991,963 997,079 Total real estate - mortgage 5,546 4,514 - 10,060 1,015 2,917,733 2,928,808 Consumer 131 23 48 202 38 61,973 62,213 Total $ 7,143 $ 11,236 $ 60 $ 18,439 $ 10,765 $ 5,822,057 $ 5,851,261
Allowance for Credit Losses on Financing Receivables [Table Text Block]	Commercial, financial and Real estate - Real estate - agricultural construction mortgage Consumer Total (In Thousands) Three Months Ended March 31, 2018 Allowance for loan losses: Balance at December 31, 2017 $ 32,880 $ 4,989 $ 21,022 $ 515 $ 59,406 Charge-offs (1,088 ) - (381 ) (88 ) (1,557 ) Recoveries 4 7 42 9 62 Provision 3,991 (858 ) 923 83 4,139 Balance at March 31, 2018 $ 35,787 $ 4,138 $ 21,606 $ 519 $ 62,050 Three Months Ended March 31, 2017 Allowance for loan losses: Balance at December 31, 2016 $ 28,872 $ 5,125 $ 17,504 $ 392 $ 51,893 Charge-offs (2,855 ) - (266 ) (75 ) (3,196 ) Recoveries 190 16 2 1 209 Provision 2,500 (316 ) 2,722 80 4,986 Balance at March 31, 2017 $ 28,707 $ 4,825 $ 19,962 $ 398 $ 53,892 As of March 31, 2018 Allowance for loan losses: Individually Evaluated for Impairment $ 5,877 $ 120 $ 432 $ 49 $ 6,478 Collectively Evaluated for Impairment 29,910 4,018 21,174 470 55,572 Loans: Ending Balance $ 2,329,904 $ 506,050 $ 3,030,659 $ 61,714 $ 5,928,327 Individually Evaluated for Impairment 24,536 1,625 16,328 87 42,576 Collectively Evaluated for Impairment 2,305,368 504,425 3,014,331 61,627 5,885,751 As of December 31, 2017 Allowance for loan losses: Individually Evaluated for Impairment $ 4,276 $ 120 $ 1,163 $ 50 $ 5,609 Collectively Evaluated for Impairment 28,604 4,869 19,859 465 53,797 Loans: Ending Balance $ 2,279,366 $ 580,874 $ 2,928,808 $ 62,213 $ 5,851,261 Individually Evaluated for Impairment 26,447 1,571 12,404 88 40,510 Collectively Evaluated for Impairment 2,252,919 579,303 2,916,404 62,125 5,810,751
Impaired Financing Receivables [Table Text Block]	March 31, 2018 For the three months ended March 31, 2018 Interest Unpaid Average Income Recorded Principal Related Recorded Recognized Investment Balance Allowance Investment in Period (In Thousands) With no allowance recorded: Commercial, financial and agricultural $ 6,176 $ 6,953 $ - $ 6,165 $ 71 Real estate - construction 628 631 - 632 8 Real estate - mortgage: Owner-occupied commercial 2,604 2,771 - 2,789 38 1-4 family mortgage 2,258 2,258 - 2,256 25 Other mortgage 5,090 5,090 - 5,114 63 Total real estate - mortgage 9,952 10,119 - 10,159 126 Consumer 38 38 - 39 1 Total with no allowance recorded 16,794 17,741 - 16,995 206 With an allowance recorded: Commercial, financial and agricultural 18,360 25,182 5,877 19,809 147 Real estate - construction 997 997 120 997 14 Real estate - mortgage: Owner-occupied commercial 3,664 3,664 - 3,664 50 1-4 family mortgage 850 850 151 850 12 Other mortgage 1,862 1,862 281 1,862 20 Total real estate - mortgage 6,376 6,376 432 6,376 82 Consumer 49 49 49 50 1 Total with allowance recorded 25,782 32,604 6,478 27,232 244 Total Impaired Loans: Commercial, financial and agricultural 24,536 32,135 5,877 25,974 218 Real estate - construction 1,625 1,628 120 1,629 22 Real estate - mortgage: Owner-occupied commercial 6,268 6,435 - 6,453 88 1-4 family mortgage 3,108 3,108 151 3,106 37 Other mortgage 6,952 6,952 281 6,976 83 Total real estate - mortgage 16,328 16,495 432 16,535 208 Consumer 87 87 49 89 2 Total impaired loans $ 42,576 $ 50,345 $ 6,478 $ 44,227 $ 450 December 31, 2017 For the twelve months ended December 31, 2017 Interest Unpaid Average Income Recorded Principal Related Recorded Recognized Investment Balance Allowance Investment In Period (In Thousands) With no allowance recorded: Commercial, financial and agricultural $ 10,036 $ 16,639 $ - $ 16,417 $ 571 Real estate - construction 574 577 - 663 31 Real estate - mortgage: Owner-occupied commercial 2,640 2,806 - 2,875 159 1-4 family mortgage 2,262 2,262 - 2,289 93 Other mortgage 746 746 - 727 44 Total real estate - mortgage 5,648 5,814 - 5,891 296 Consumer 38 39 - 42 3 Total with no allowance recorded 16,296 23,069 - 23,013 901 With an allowance recorded: Commercial, financial and agricultural 16,411 16,992 4,276 17,912 651 Real estate - construction 997 997 120 997 56 Real estate - mortgage: Owner-occupied commercial 3,914 3,914 601 3,801 215 1-4 family mortgage 980 980 281 1,113 54 Other mortgage 1,862 1,862 281 1,862 80 Total real estate - mortgage 6,756 6,756 1,163 6,776 349 Consumer 50 50 50 42 3 Total with allowance recorded 24,214 24,795 5,609 25,727 1,059 Total Impaired Loans: Commercial, financial and agricultural 26,447 33,631 4,276 34,329 1,222 Real estate - construction 1,571 1,574 120 1,660 87 Real estate - mortgage: Owner-occupied commercial 6,554 6,720 601 6,676 374 1-4 family mortgage 3,242 3,242 281 3,402 147 Other mortgage 2,608 2,608 281 2,589 124 Total real estate - mortgage 12,404 12,570 1,163 12,667 645 Consumer 88 89 50 84 6 Total impaired loans $ 40,510 $ 47,864 $ 5,609 $ 48,740 $ 1,960

Note 6 - Employee and Directo24

Note 6 - Employee and Director Benefits (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	2018 2017 Expected volatility 23.43 % 29.00 % Expected dividends 1.07 % 0.43 % Expected term (in years) 6 6 Risk-free rate 2.67 % 2.08 %
Share-based Compensation, Stock Options, Activity [Table Text Block]	Weighted Weighted Average Average Remaining Exercise Contractual Aggregate Shares Price Term (years) Intrinsic Value (In Thousands) Three Months Ended March 31, 2018: Outstanding at January 1, 2018 1,666,834 $ 10.68 5.5 $ 51,377 Granted 10,250 41.21 9.9 (4 ) Exercised (173,836 ) 4.90 3.4 6,244 Forfeited (1,000 ) 25.41 8.5 15 Outstanding at March 31, 2018 1,502,248 11.54 5.5 $ 43,978 Exercisable at March 31, 2018 672,600 $ 5.48 3.9 $ 23,770 Three Months Ended March 31, 2017: Outstanding at January 1, 2017 2,026,334 $ 9.00 6.2 $ 57,636 Granted 51,500 38.10 9.8 (89 ) Exercised (175,500 ) 5.28 5.0 5,459 Forfeited (27,000 ) 21.55 8.8 401 Outstanding at March 31, 2017 1,875,334 9.96 6.2 $ 49,540 Exercisable at March 31, 2017 928,236 $ 5.12 4.6 $ 29,013

Note 10 - Fair Value Measurem25

Note 10 - Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Fair Value Measurements at March 31, 2018 Using Quoted Prices in Active Markets Significant Other Significant for Identical Observable Inputs Unobservable Assets (Level 1) (Level 2) Inputs (Level 3) Total Assets Measured on a Recurring Basis: (In Thousands) Available for sale debt securities: U.S. Treasury and government sponsored agencies $ - $ 57,252 $ - $ 57,252 Mortgage-backed securities - 288,318 - 288,318 State and municipal securities - 122,789 - 122,789 Corporate debt - 85,673 6,603 92,276 Total assets at fair value $ - $ 554,032 $ 6,603 $ 560,635 Fair Value Measurements at December 31, 2017 Using Quoted Prices in Active Markets Significant Other Significant for Identical Observable Inputs Unobservable Assets (Level 1) (Level 2) Inputs (Level 3) Total Assets Measured on a Recurring Basis: (In Thousands) Available for sale debt securities: U.S. Treasury and government sponsored agencies $ - $ 55,356 $ - $ 55,356 Mortgage-backed securities - 276,498 - 276,498 State and municipal securities - 134,849 - 134,849 Corporate debt - 64,877 6,500 71,377 Total assets at fair value $ - $ 531,580 $ 6,500 $ 538,080
Fair Value Measurements, Nonrecurring [Table Text Block]	Fair Value Measurements at March 31, 2018 Using Quoted Prices in Active Markets Significant Other Significant for Identical Observable Unobservable Assets (Level 1) Inputs (Level 2) Inputs (Level 3) Total Assets Measured on a Nonrecurring Basis: (In Thousands) Impaired loans $ - $ - $ 36,098 $ 36,098 Other real estate owned and repossessed assets - - 5,748 5,748 Total assets at fair value $ - $ - $ 41,846 $ 41,846 Fair Value Measurements at December 31, 2017 Using Quoted Prices in Active Markets Significant Other Significant for Identical Observable Unobservable Assets (Level 1) Inputs (Level 2) Inputs (Level 3) Total Assets Measured on a Nonrecurring Basis: (In Thousands) Impaired loans $ - $ - $ 34,901 $ 34,901 Other real estate owned - - 6,701 6,701 Total assets at fair value $ - $ - $ 41,602 $ 41,602
Fair Value, by Balance Sheet Grouping [Table Text Block]	March 31, 2018 December 31, 2017 Carrying Carrying Amount Fair Value Amount Fair Value (In Thousands) Financial Assets: Level 1 inputs: Cash and due from banks $ 118,223 $ 118,223 $ 238,062 $ 238,062 Level 2 inputs: Available for sale debt securities $ 554,032 $ 554,032 $ 531,580 $ 531,580 Equity securities 1,026 1,026 1,034 1,034 Federal funds sold 197,882 197,882 239,524 239,524 Mortgage loans held for sale 4,522 4,522 4,459 4,459 Bank owned life insurance contracts 128,296 128,296 127,519 127,519 Level 3 Inputs: Available for sale debt securities $ 6,603 $ 6,603 $ 6,500 $ 6,500 Held to maturity debt securities 250 250 250 250 Loans, net 5,830,178 5,769,403 5,756,954 5,712,441 Financial Liabilities: Level 2 inputs: Deposits $ 5,977,387 $ 5,969,531 $ 6,091,674 $ 6,086,085 Federal funds purchased 326,399 326,399 301,797 301,797 Other borrowings 64,739 65,799 64,832 65,921

Note 3 - Earnings Per Common 26

Note 3 - Earnings Per Common Share - Summary of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Weighted average common shares outstanding (in shares)	53,082,322	52,745,335
Net income available to common stockholders	$ 32,603	$ 22,519
Basic earnings per common share (in dollars per share)	$ 0.61	$ 0.43
Dilutive effects of assumed conversions and exercise of stock options and warrants (in shares)	1,101,078	1,388,387
Weighted average common and dilutive potential common shares outstanding (in shares)	54,183,400	54,133,722
Net income available to common stockholders	$ 32,603	$ 22,519
Diluted earnings per common share (in dollars per share)	$ 0.60	$ 0.42

Note 4 - Securities (Details Te

Note 4 - Securities (Details Textual)	Mar. 31, 2018
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	73
Available for Sale Securities Debt Securities, Number of Positions	797

Note 4 - Securities - Amortized

Note 4 - Securities - Amortized Cost and Fair Value of Available-for-sale and Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Available for sale, amortized cost	$ 567,139	$ 538,381
Available for sale, gross unrealized gain	2,512	3,221
Available for sale, gross unrealized loss	(9,016)	(3,522)
Available for sale, fair value	560,635	538,080
Held to maturity, amortized cost	250	250
Held to maturity, gross unrealized gain
Held to maturity, gross unrealized loss
Held to maturity debt securities, fair value	250	250	[1]
Held to maturity, gross unrealized loss
US Treasury and Government [Member]
Available for sale, amortized cost	58,025	55,567
Available for sale, gross unrealized gain	5	38
Available for sale, gross unrealized loss	(777)	(249)
Available for sale, fair value	57,252	55,356
Collateralized Mortgage Backed Securities [Member]
Available for sale, amortized cost	294,582	278,177
Available for sale, gross unrealized gain	609	1,006
Available for sale, gross unrealized loss	(6,874)	(2,685)
Available for sale, fair value	288,318	276,498
US States and Political Subdivisions Debt Securities [Member]
Available for sale, amortized cost	123,123	134,641
Available for sale, gross unrealized gain	522	761
Available for sale, gross unrealized loss	(856)	(553)
Available for sale, fair value	122,789	134,849
Held to maturity, amortized cost	250	250
Held to maturity, gross unrealized gain
Held to maturity, gross unrealized loss
Held to maturity debt securities, fair value	250	250
Held to maturity, gross unrealized loss
Corporate Debt Securities [Member]
Available for sale, amortized cost	91,409	69,996
Available for sale, gross unrealized gain	1,376	1,416
Available for sale, gross unrealized loss	(509)	(35)
Available for sale, fair value	$ 92,276	$ 71,377
[1]	derived from audited financial statements

Note 4 - Securities - Amortiz29

Note 4 - Securities - Amortized Cost and Fair Value of Contractual Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Available for sale, amortized cost	$ 567,139	$ 538,381
Available for sale, fair value	560,635	538,080
Held to maturity, amortized cost	250	250
Held to maturity debt securities, fair value	250	250	[1]
Due Within One Year [Member]
Available for sale, amortized cost	45,864	22,122
Available for sale, fair value	45,909	22,172
Due from One to Five Years [Member]
Available for sale, amortized cost	194,445	160,773
Available for sale, fair value	193,930	160,563
Held to maturity, amortized cost	250	250
Held to maturity debt securities, fair value	250	250
Due from Five to Ten Years [Member]
Available for sale, amortized cost	29,371	73,362
Available for sale, fair value	29,472	74,684
Due After Ten Years [Member]
Available for sale, amortized cost	2,877	3,947
Available for sale, fair value	3,006	4,163
Collateralized Mortgage Backed Securities [Member]
Available for sale, amortized cost	294,582	278,177
Available for sale, fair value	$ 288,318	$ 276,498
[1]	derived from audited financial statements

Note 4 - Securities - Investmen

Note 4 - Securities - Investment Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Less Than Twelve Months, Gross Unrealized Losses	$ (5,906)	$ (1,622)
Less Than Twelve Months, Fair Value	345,327	247,425
Twelve Months or More, Gross Unrealized Losses	(3,110)	(1,900)
Twelve Months or More, Fair Value	80,565	85,477
Total, Gross Unrealized Losses	(9,016)	(3,522)
Total, Fair Value	425,892	332,902
US Treasury and Government [Member]
Less Than Twelve Months, Gross Unrealized Losses	(635)	(151)
Less Than Twelve Months, Fair Value	54,191	33,401
Twelve Months or More, Gross Unrealized Losses	(142)	(98)
Twelve Months or More, Fair Value	2,881	2,926
Total, Gross Unrealized Losses	(777)	(249)
Total, Fair Value	57,072	36,327
Collateralized Mortgage Backed Securities [Member]
Less Than Twelve Months, Gross Unrealized Losses	(4,046)	(986)
Less Than Twelve Months, Fair Value	200,071	140,432
Twelve Months or More, Gross Unrealized Losses	(2,828)	(1,699)
Twelve Months or More, Fair Value	71,042	75,903
Total, Gross Unrealized Losses	(6,874)	(2,685)
Total, Fair Value	271,113	216,335
US States and Political Subdivisions Debt Securities [Member]
Less Than Twelve Months, Gross Unrealized Losses	(716)	(450)
Less Than Twelve Months, Fair Value	64,676	66,637
Twelve Months or More, Gross Unrealized Losses	(140)	(103)
Twelve Months or More, Fair Value	6,642	6,648
Total, Gross Unrealized Losses	(856)	(553)
Total, Fair Value	71,318	73,285
Corporate Debt Securities [Member]
Less Than Twelve Months, Gross Unrealized Losses	(509)	(35)
Less Than Twelve Months, Fair Value	26,389	6,955
Twelve Months or More, Gross Unrealized Losses
Twelve Months or More, Fair Value
Total, Gross Unrealized Losses	(509)	(35)
Total, Fair Value	$ 26,389	$ 6,955

Note 5 - Loans (Details Textual

Note 5 - Loans (Details Textual) xbrli-pure in Thousands, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Financing Receivable, Modifications, Recorded Investment	$ 18.8	$ 7.3	$ 20.6
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 5.1	$ 2.3	$ 4.3
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0

Note 5 - Loans - Summary of Loa

Note 5 - Loans - Summary of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017		Mar. 31, 2017	Dec. 31, 2016
Financing receivable, gross	$ 5,928,327	$ 5,851,261
Less allowance for loan losses	(62,050)	(59,406)	[1]	$ (53,892)	$ (51,893)
Net Loans	$ 5,866,277	$ 5,791,855	[1]
Financing receivable, gross, percentage	100.00%	100.00%
Commercial Real Estate Portfolio Segment [Member]
Financing receivable, gross	$ 2,329,904	$ 2,279,366
Less allowance for loan losses	$ (35,787)	$ (32,880)		(28,707)	(28,872)
Financing receivable, gross, percentage	39.30%	38.96%
Real Estate Portfolio Segment[Member]
Financing receivable, gross	$ 3,030,659	$ 2,928,808
Financing receivable, gross, percentage	51.12%	50.05%
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Financing receivable, gross	$ 506,050	$ 580,874
Less allowance for loan losses	$ (4,138)	$ (4,989)		(4,825)	(5,125)
Financing receivable, gross, percentage	8.54%	9.93%
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	$ 1,349,679	$ 1,328,666
Financing receivable, gross, percentage	22.77%	22.71%
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Financing receivable, gross	$ 581,498	$ 603,063
Financing receivable, gross, percentage	9.81%	10.30%
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Financing receivable, gross	$ 1,099,482	$ 997,079
Financing receivable, gross, percentage	18.54%	17.04%
Consumer Portfolio Segment [Member]
Financing receivable, gross	$ 61,714	$ 62,213
Less allowance for loan losses	$ (519)	$ (515)		$ (398)	$ (392)
Financing receivable, gross, percentage	1.04%	1.06%
[1]	derived from audited financial statements

Note 5 - Loans - Loans by Credi

Note 5 - Loans - Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing receivable, gross	$ 5,928,327	$ 5,851,261
Pass [Member]
Financing receivable, gross	5,825,833	5,751,507
Special Mention [Member]
Financing receivable, gross	62,259	61,622
Substandard [Member]
Financing receivable, gross	40,235	38,132
Doubtful [Member]
Financing receivable, gross
Commercial Real Estate Portfolio Segment [Member]
Financing receivable, gross	2,329,904	2,279,366
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Financing receivable, gross	2,272,468	2,225,084
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Financing receivable, gross	32,900	27,835
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Financing receivable, gross	24,536	26,447
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Financing receivable, gross
Real Estate Portfolio Segment[Member]
Financing receivable, gross	3,030,659	2,928,808
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Financing receivable, gross	506,050	580,874
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	1,349,679	1,328,666
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Financing receivable, gross	581,498	603,063
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Financing receivable, gross	1,099,482	997,079
Real Estate Portfolio Segment[Member] | Pass [Member]
Financing receivable, gross	2,993,896	2,891,683
Real Estate Portfolio Segment[Member] | Pass [Member] | Construction Loans [Member]
Financing receivable, gross	497,846	572,657
Real Estate Portfolio Segment[Member] | Pass [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	1,338,307	1,317,113
Real Estate Portfolio Segment[Member] | Pass [Member] | One to Four Family [Member]
Financing receivable, gross	576,792	598,222
Real Estate Portfolio Segment[Member] | Pass [Member] | Other Mortgages [Member]
Financing receivable, gross	1,078,797	976,348
Real Estate Portfolio Segment[Member] | Special Mention [Member]
Financing receivable, gross	22,732	27,054
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Construction Loans [Member]
Financing receivable, gross	6,623	6,691
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	7,401	7,333
Real Estate Portfolio Segment[Member] | Special Mention [Member] | One to Four Family [Member]
Financing receivable, gross	1,599	1,599
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Other Mortgages [Member]
Financing receivable, gross	13,732	18,122
Real Estate Portfolio Segment[Member] | Substandard [Member]
Financing receivable, gross	14,031	10,071
Real Estate Portfolio Segment[Member] | Substandard [Member] | Construction Loans [Member]
Financing receivable, gross	1,581	1,526
Real Estate Portfolio Segment[Member] | Substandard [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	3,971	4,220
Real Estate Portfolio Segment[Member] | Substandard [Member] | One to Four Family [Member]
Financing receivable, gross	3,107	3,242
Real Estate Portfolio Segment[Member] | Substandard [Member] | Other Mortgages [Member]
Financing receivable, gross	6,953	2,609
Real Estate Portfolio Segment[Member] | Doubtful [Member]
Financing receivable, gross
Real Estate Portfolio Segment[Member] | Doubtful [Member] | Construction Loans [Member]
Financing receivable, gross
Real Estate Portfolio Segment[Member] | Doubtful [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross
Real Estate Portfolio Segment[Member] | Doubtful [Member] | One to Four Family [Member]
Financing receivable, gross
Real Estate Portfolio Segment[Member] | Doubtful [Member] | Other Mortgages [Member]
Financing receivable, gross
Consumer Portfolio Segment [Member]
Financing receivable, gross	61,714	62,213
Consumer Portfolio Segment [Member] | Pass [Member]
Financing receivable, gross	61,623	62,083
Consumer Portfolio Segment [Member] | Special Mention [Member]
Financing receivable, gross	4	42
Consumer Portfolio Segment [Member] | Substandard [Member]
Financing receivable, gross	87	88
Consumer Portfolio Segment [Member] | Doubtful [Member]
Financing receivable, gross

Note 5 - Loans - Loans by Perfo

Note 5 - Loans - Loans by Performance Status (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing receivable, gross	$ 5,928,327	$ 5,851,261
Performing Financial Instruments [Member]
Financing receivable, gross	5,918,378	5,840,436
Nonperforming Financial Instruments [Member]
Financing receivable, gross	9,949	10,825
Commercial Real Estate Portfolio Segment [Member]
Financing receivable, gross	2,329,904	2,279,366
Commercial Real Estate Portfolio Segment [Member] | Performing Financial Instruments [Member]
Financing receivable, gross	2,320,887	2,269,642
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Financing receivable, gross	9,017	9,724
Real Estate Portfolio Segment[Member]
Financing receivable, gross	3,030,659	2,928,808
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Financing receivable, gross	506,050	580,874
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	1,349,679	1,328,666
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Financing receivable, gross	581,498	603,063
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Financing receivable, gross	1,099,482	997,079
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member]
Financing receivable, gross	3,029,808	2,927,793
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | Construction Loans [Member]
Financing receivable, gross	506,050	580,874
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	1,349,373	1,328,110
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | One to Four Family [Member]
Financing receivable, gross	580,953	602,604
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | Other Mortgages [Member]
Financing receivable, gross	1,099,482	997,079
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member]
Financing receivable, gross	851	1,015
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | Construction Loans [Member]
Financing receivable, gross
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	306	556
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | One to Four Family [Member]
Financing receivable, gross	545	459
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | Other Mortgages [Member]
Financing receivable, gross
Consumer Portfolio Segment [Member]
Financing receivable, gross	61,714	62,213
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Financing receivable, gross	61,633	62,127
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Financing receivable, gross	$ 81	$ 86

Note 5 - Loans - Loans Categori

Note 5 - Loans - Loans Categorized by Past Due Status (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accrual loans, past due	$ 40,060	$ 18,439
Non-accrual	9,271	10,765
Current	5,878,996	5,822,057
Loans	5,928,327	5,851,261	[1]
Financing Receivables, 30 to 59 Days Past Due [Member]
Accrual loans, past due	1,388	7,143
Financing Receivables, 60 to 89 Days Past Due [Member]
Accrual loans, past due	37,994	11,236
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accrual loans, past due	678	60
Commercial Real Estate Portfolio Segment [Member]
Accrual loans, past due	11,222	7,124
Non-accrual	8,599	9,712
Current	2,310,083	2,262,530
Loans	2,329,904	2,279,366
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accrual loans, past due	309	1,410
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accrual loans, past due	10,495	5,702
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accrual loans, past due	418	12
Real Estate Portfolio Segment[Member]
Accrual loans, past due	21,133	10,060
Non-accrual	634	1,015
Current	3,008,892	2,917,733
Loans	3,030,659	2,928,808
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Accrual loans, past due	7,619	1,053
Non-accrual
Current	498,431	579,821
Loans	506,050	580,874
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Accrual loans, past due	3,779	3,664
Non-accrual	306	556
Current	1,345,594	1,324,446
Loans	1,349,679	1,328,666
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Accrual loans, past due	2,146	1,280
Non-accrual	328	459
Current	579,024	601,324
Loans	581,498	603,063
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Accrual loans, past due	15,208	5,116
Non-accrual
Current	1,084,274	991,963
Loans	1,099,482	997,079
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accrual loans, past due	1,060	5,546
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Accrual loans, past due		56
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Owner Occupied Commercial [Member]
Accrual loans, past due	115
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | One to Four Family [Member]
Accrual loans, past due	564	430
Real Estate Portfolio Segment[Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Other Mortgages [Member]
Accrual loans, past due	381	5,116
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accrual loans, past due	19,856	4,514
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Accrual loans, past due	7,619	997
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Owner Occupied Commercial [Member]
Accrual loans, past due	3,664	3,664
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | One to Four Family [Member]
Accrual loans, past due	1,365	850
Real Estate Portfolio Segment[Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Other Mortgages [Member]
Accrual loans, past due	14,827
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accrual loans, past due	217
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Accrual loans, past due
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Owner Occupied Commercial [Member]
Accrual loans, past due
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | One to Four Family [Member]
Accrual loans, past due	217
Real Estate Portfolio Segment[Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Other Mortgages [Member]
Accrual loans, past due
Consumer Portfolio Segment [Member]
Accrual loans, past due	86	202
Non-accrual	38	38
Current	61,590	61,973
Loans	61,714	62,213
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accrual loans, past due	19	131
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accrual loans, past due	24	23
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accrual loans, past due	$ 43	$ 48
[1]	derived from audited financial statements

Note 5 - Loans - Analysis of Al

Note 5 - Loans - Analysis of Allowance for Loans Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018		Mar. 31, 2017	Dec. 31, 2017
Balance, beginning of period	$ 59,406	[1]	$ 51,893
Charge-offs	(1,557)		(3,196)
Recoveries	62		209
Provision	4,139		4,986
Balance, end of period	62,050		53,892
Individually Evaluated for Impairment	6,478			$ 5,609
Collectively Evaluated for Impairment	55,572			53,797
Loans	5,928,327			5,851,261	[1]
Individually Evaluated for Impairment	42,576			40,510
Collectively Evaluated for Impairment	5,885,751			5,810,751
Commercial Real Estate Portfolio Segment [Member]
Balance, beginning of period	32,880		28,872
Charge-offs	(1,088)		(2,855)
Recoveries	4		190
Provision	3,991		2,500
Balance, end of period	35,787		28,707
Individually Evaluated for Impairment	5,877			4,276
Collectively Evaluated for Impairment	29,910			28,604
Loans	2,329,904			2,279,366
Individually Evaluated for Impairment	24,536			26,447
Collectively Evaluated for Impairment	2,305,368			2,252,919
Real Estate Portfolio Segment[Member]
Loans	3,030,659			2,928,808
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Balance, beginning of period	4,989		5,125
Charge-offs
Recoveries	7		16
Provision	(858)		(316)
Balance, end of period	4,138		4,825
Individually Evaluated for Impairment	120			120
Collectively Evaluated for Impairment	4,018			4,869
Loans	506,050			580,874
Individually Evaluated for Impairment	1,625			1,571
Collectively Evaluated for Impairment	504,425			579,303
Real Estate Portfolio Segment[Member] | Real Estate Loan [Member]
Balance, beginning of period	21,022		17,504
Charge-offs	(381)		(266)
Recoveries	42		2
Provision	923		2,722
Balance, end of period	21,606		19,962
Individually Evaluated for Impairment	432			1,163
Collectively Evaluated for Impairment	21,174			19,859
Loans	3,030,659			2,928,808
Individually Evaluated for Impairment	16,328			12,404
Collectively Evaluated for Impairment	3,014,331			2,916,404
Consumer Portfolio Segment [Member]
Balance, beginning of period	515		392
Charge-offs	(88)		(75)
Recoveries	9		1
Provision	83		80
Balance, end of period	519		$ 398
Individually Evaluated for Impairment	49			50
Collectively Evaluated for Impairment	470			465
Loans	61,714			62,213
Individually Evaluated for Impairment	87			88
Collectively Evaluated for Impairment	$ 61,627			$ 62,125
[1]	derived from audited financial statements

Note 5 - Loans - Summary of Imp

Note 5 - Loans - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Recorded investment, with no allowance	$ 16,794	$ 16,296
Unpaid principal balance, with no allowance	17,741	23,069
Average recorded investment, with no allowance	16,995	23,013
Interest income recognized in period, with no allowance	206	901
Recorded investment, with an allowance	25,782	24,214
Unpaid principal balance, with an allowance	32,604	24,795
Related allowance	6,478	5,609
Average recorded investment, with an allowance	27,232	25,727
Interest income recognized in period, with an allowance	244	1,059
Recorded investment	42,576	40,510
Unpaid principal balance	50,345	47,864
Average recorded investment	44,227	48,740
Interest income recognized in period	450	1,960
Commercial Real Estate Portfolio Segment [Member]
Recorded investment, with no allowance	6,176	10,036
Unpaid principal balance, with no allowance	6,953	16,639
Average recorded investment, with no allowance	6,165	16,417
Interest income recognized in period, with no allowance	71	571
Recorded investment, with an allowance	18,360	16,411
Unpaid principal balance, with an allowance	25,182	16,992
Related allowance	5,877	4,276
Average recorded investment, with an allowance	19,809	17,912
Interest income recognized in period, with an allowance	147	651
Recorded investment	24,536	26,447
Unpaid principal balance	32,135	33,631
Average recorded investment	25,974	34,329
Interest income recognized in period	218	1,222
Real Estate Portfolio Segment[Member]
Recorded investment, with no allowance	9,952	5,648
Unpaid principal balance, with no allowance	10,119	5,814
Average recorded investment, with no allowance	10,159	5,891
Interest income recognized in period, with no allowance	126	296
Recorded investment, with an allowance	6,376	6,756
Unpaid principal balance, with an allowance	6,376	6,756
Related allowance	432	1,163
Average recorded investment, with an allowance	6,376	6,776
Interest income recognized in period, with an allowance	82	349
Recorded investment	16,328	12,404
Unpaid principal balance	16,495	12,570
Average recorded investment	16,535	12,667
Interest income recognized in period	208	645
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Recorded investment, with no allowance	628	574
Unpaid principal balance, with no allowance	631	577
Average recorded investment, with no allowance	632	663
Interest income recognized in period, with no allowance	8	31
Recorded investment, with an allowance	997	997
Unpaid principal balance, with an allowance	997	997
Related allowance	120	120
Average recorded investment, with an allowance	997	997
Interest income recognized in period, with an allowance	14	56
Recorded investment	1,625	1,571
Unpaid principal balance	1,628	1,574
Average recorded investment	1,629	1,660
Interest income recognized in period	22	87
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Recorded investment, with no allowance	2,604	2,640
Unpaid principal balance, with no allowance	2,771	2,806
Average recorded investment, with no allowance	2,789	2,875
Interest income recognized in period, with no allowance	38	159
Recorded investment, with an allowance	3,664	3,914
Unpaid principal balance, with an allowance	3,664	3,914
Related allowance		601
Average recorded investment, with an allowance	3,664	3,801
Interest income recognized in period, with an allowance	50	215
Recorded investment	6,268	6,554
Unpaid principal balance	6,435	6,720
Average recorded investment	6,453	6,676
Interest income recognized in period	88	374
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Recorded investment, with no allowance	2,258	2,262
Unpaid principal balance, with no allowance	2,258	2,262
Average recorded investment, with no allowance	2,256	2,289
Interest income recognized in period, with no allowance	25	93
Recorded investment, with an allowance	850	980
Unpaid principal balance, with an allowance	850	980
Related allowance	151	281
Average recorded investment, with an allowance	850	1,113
Interest income recognized in period, with an allowance	12	54
Recorded investment	3,108	3,242
Unpaid principal balance	3,108	3,242
Average recorded investment	3,106	3,402
Interest income recognized in period	37	147
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Recorded investment, with no allowance	5,090	746
Unpaid principal balance, with no allowance	5,090	746
Average recorded investment, with no allowance	5,114	727
Interest income recognized in period, with no allowance	63	44
Recorded investment, with an allowance	1,862	1,862
Unpaid principal balance, with an allowance	1,862	1,862
Related allowance	281	281
Average recorded investment, with an allowance	1,862	1,862
Interest income recognized in period, with an allowance	20	80
Recorded investment	6,952	2,608
Unpaid principal balance	6,952	2,608
Average recorded investment	6,976	2,589
Interest income recognized in period	83	124
Consumer Portfolio Segment [Member]
Recorded investment, with no allowance	38	38
Unpaid principal balance, with no allowance	38	39
Average recorded investment, with no allowance	39	42
Interest income recognized in period, with no allowance	1	3
Recorded investment, with an allowance	49	50
Unpaid principal balance, with an allowance	49	50
Related allowance	49	50
Average recorded investment, with an allowance	50	42
Interest income recognized in period, with an allowance	1	3
Recorded investment	87	88
Unpaid principal balance	87	89
Average recorded investment	89	84
Interest income recognized in period	$ 2	$ 6

Note 6 - Employee and Directo38

Note 6 - Employee and Director Benefits (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2006
Share-based Compensation, Total	$ 238,000	$ 337,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 11.91
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 1,847,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years 146 days
Restricted Stock [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 841,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 219 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
The 2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			6,150,000
The 2009 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	5,550,000

Note 6 - Employee and Directo39

Note 6 - Employee and Director Benefits - Assumption Used to Estimate Fair Value of Stock Option Awards (Details) - Employee Stock Option [Member]	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Expected volatility	23.43%	29.00%
Expected dividends	1.07%	0.43%
Expected term (in years) (Year)	6 years	6 years
Risk-free rate	2.67%	2.08%

Note 6 - Employee and Directo40

Note 6 - Employee and Director Benefits - Summary of Stock Option Activity (Details) - Employee Stock Option [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Outstanding, shares (in shares)	1,666,834	2,026,334	2,026,334
Outstanding, weighted average exercise price (in dollars per share)	$ 10.68	$ 9	$ 9
Outstanding, weighted average remaining contractual term (Year)	5 years 182 days	6 years 73 days	5 years 182 days	6 years 73 days
Outstanding, aggregate intrinsic value	$ 43,978	$ 49,540	$ 51,377	$ 57,636
Granted (in shares)	10,250	51,500
Granted, weighted average exercise price (in dollars per share)	$ 41.21	$ 38.10
Granted, weighted average remaining contractual term (Year)	9 years 328 days	9 years 292 days
Granted, aggregate intrinsic value	$ (4)	$ (89)
Exercised (in shares)	(173,836)	(175,500)
Exercised, weighted average exercise price (in dollars per share)	$ 4.90	$ 5.28
Exercised, weighted average remaining contractual term (Year)	3 years 146 days	5 years
Exercised, aggregate intrinsic value	$ 6,244	$ 5,459
Forfeited (in shares)	(1,000)	(27,000)
Forfeited, weighted average exercise price (in dollars per share)	$ 25.41	$ 21.55
Forfeited, weighted average remaining contractual term (Year)	8 years 182 days	8 years 292 days
Forfeited, aggregate intrinsic value	$ 15	$ 401
Outstanding, shares (in shares)	1,502,248	1,875,334	1,666,834	2,026,334
Outstanding, weighted average exercise price (in dollars per share)	$ 11.54	$ 9.96	$ 10.68	$ 9
Exercisable, shares (in shares)	672,600	928,236
Exercisable, weighted average exercise price (in dollars per share)	$ 5.48	$ 5.12
Exercisable, weighted average remaining contractual term (Year)	3 years 328 days	4 years 219 days
Exercisable, aggregate intrinsic value	$ 23,770	$ 29,013

Note 8 - Recently Adopted Acc41

Note 8 - Recently Adopted Accounting Pronouncements (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total		$ (5,105,000)	$ (198,000)	[1]
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Adjustments for New Accounting Principle, Early Adoption [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total			$ 43,000
[1]	derived from audited financial statements

Note 10 - Fair Value Measurem42

Note 10 - Fair Value Measurement (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Asset Impairment Charges, Total	$ 2,345,000	$ 2,978,000
Real Estate Owned, Amount of Loss at Acquisition	254,000	$ 30,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure	$ 175,000		$ 0

Note 10 - Fair Value Measurem43

Note 10 - Fair Value Measurement - Financial Assets and Financial Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Available for sale debt securities	$ 560,635	$ 538,080	[1]
Fair Value, Measurements, Recurring [Member]
Available for sale debt securities	560,635	538,080
Fair Value, Measurements, Recurring [Member] | US Treasury and Government [Member]
Available for sale debt securities	57,252	55,356
Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Backed Securities [Member]
Available for sale debt securities	288,318	276,498
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Available for sale debt securities	122,789	134,849
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member]
Available for sale debt securities	92,276	71,377
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Available for sale debt securities
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury and Government [Member]
Available for sale debt securities
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Backed Securities [Member]
Available for sale debt securities
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Available for sale debt securities
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]
Available for sale debt securities
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale debt securities	554,032	531,580
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member]
Available for sale debt securities	57,252	55,356
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities [Member]
Available for sale debt securities	288,318	276,498
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Available for sale debt securities	122,789	134,849
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Available for sale debt securities	85,673	64,877
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Available for sale debt securities	6,603	6,500
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury and Government [Member]
Available for sale debt securities
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Backed Securities [Member]
Available for sale debt securities
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
Available for sale debt securities
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member]
Available for sale debt securities	$ 6,603	$ 6,500
[1]	derived from audited financial statements

Note 10 - Fair Value Measurem44

Note 10 - Fair Value Measurement - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Impaired loans	$ 36,098	$ 34,901
Other real estate owned and repossessed assets	5,748	6,701
Total assets at fair value	41,846	41,602
Fair Value, Inputs, Level 1 [Member]
Impaired loans
Other real estate owned and repossessed assets
Total assets at fair value
Fair Value, Inputs, Level 2 [Member]
Impaired loans
Other real estate owned and repossessed assets
Total assets at fair value
Fair Value, Inputs, Level 3 [Member]
Impaired loans	36,098	34,901
Other real estate owned and repossessed assets	5,748	6,701
Total assets at fair value	$ 41,846	$ 41,602

Note 10 - Fair Value Measurem45

Note 10 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Cash and due from banks	$ 64,912	$ 86,213	[1]
Available for sale debt securities	560,635	538,080	[1]
Equity securities	1,026	1,034	[1]
Federal funds sold	197,882	239,524	[1]
Mortgage loans held for sale	4,522	4,459	[1]
Bank owned life insurance contracts	128,296	127,519	[1]
Held to maturity debt securities	250	250	[1]
Net Loans	5,866,277	5,791,855	[1]
Federal funds purchased	326,399	301,797	[1]
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and due from banks	118,223	238,062
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale debt securities	554,032	531,580
Equity securities	1,026	1,034
Federal funds sold	197,882	239,524
Mortgage loans held for sale	4,522	4,459
Bank owned life insurance contracts	128,296	127,519
Deposits	5,977,387	6,091,674
Federal funds purchased	326,399	301,797
Other borrowings	64,739	64,832
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Available for sale debt securities	6,603	6,500
Held to maturity debt securities	250	250
Net Loans	5,830,178	5,756,954
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and due from banks	118,223	238,062
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale debt securities	554,032	531,580
Equity securities	1,026	1,034
Federal funds sold	197,882	239,524
Mortgage loans held for sale	4,522	4,459
Bank owned life insurance contracts	128,296	127,519
Deposits	5,969,531	6,086,085
Federal funds purchased	326,399	301,797
Other borrowings	65,799	65,921
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Available for sale debt securities	6,603	6,500
Held to maturity debt securities	250	250
Net Loans	$ 5,769,403	$ 5,712,441
[1]	derived from audited financial statements