ServisFirst Bancshares (SFBS) 10-Q 30 Apr 19 2019 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 26, 2019
Document Information [Line Items]
Entity Registrant Name	ServisFirst Bancshares, Inc.
Entity Central Index Key	0001430723
Trading Symbol	sfbs
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding (in shares)		53,511,182
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks		$ 71,058	$ 97,516	[1]
Interest-bearing balances due from depository institutions		547,036	360,534	[1]
Federal funds sold		181,435	223,845	[1]
Cash and cash equivalents		799,529	681,895	[1]
Available for sale debt securities, at fair value		631,696	590,184	[1]
Held to maturity debt securities (fair value of $250 at March 31, 2019)	[1]	250
Mortgage loans held for sale		1,223	120	[1]
Loans		6,659,908	6,533,499	[1]
Less allowance for loan losses		(70,207)	(68,600)	[1]
Loans, net		6,589,701	6,464,899	[1]
Premises and equipment, net		57,664	57,822	[1]
Accrued interest and dividends receivable		26,998	24,070	[1]
Deferred tax assets, net		26,209	27,277	[1]
Other real estate owned and repossessed assets		5,480	5,169	[1]
Bank owned life insurance contracts		131,411	130,649	[1]
Goodwill and other identifiable intangible assets		14,381	14,449	[1]
Other assets		26,294	10,848	[1]
Total assets		8,310,836	8,007,382	[1]
Deposits:
Noninterest-bearing		1,572,703	1,557,341	[1]
Interest-bearing		5,510,963	5,358,367	[1]
Total deposits		7,083,666	6,915,708	[1]
Federal funds purchased		373,378	288,725	[1]
Other borrowings		64,675	64,666	[1]
Accrued interest payable		11,476	10,381	[1]
Other liabilities		32,055	12,699	[1]
Total liabilities		7,565,250	7,292,179	[1]
Stockholders' equity:
Preferred stock, par value $0.001 per share; 1,000,000 authorized and undesignated at March 31, 2019 and December 31, 2018				[1]
Common stock, par value $0.001 per share; 100,000,000 shares authorized; 53,495,208 shares issued and outstanding at March 31, 2019, and 53,375,195 shares issued and outstanding at December 31, 2018		53	53	[1]
Additional paid-in capital		218,147	218,521	[1]
Retained earnings		527,853	500,868	[1]
Accumulated other comprehensive loss		(969)	(4,741)	[1]
Total stockholders' equity attributable to ServisFirst Bancshares, Inc.		745,084	714,701	[1]
Noncontrolling interest		502	502	[1]
Total stockholders' equity		745,586	715,203	[1]
Total liabilities and stockholders' equity		$ 8,310,836	$ 8,007,382	[1]
[1]	Derived from audited financial statements.

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Held to maturity debt securities, fair value	$ 250		[1]
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
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)	53,495,208	53,375,195
Common stock, outstanding (in shares)	53,495,208	53,375,195
[1]	Derived from audited financial statements.

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest income:
Interest and fees on loans	$ 85,524	$ 69,674
Taxable securities	3,746	2,745
Nontaxable securities	446	656
Federal funds sold	1,219	551
Other interest and dividends	2,764	383
Total interest income	93,699	74,009
Interest expense:
Deposits	22,145	9,621
Borrowed funds	2,776	1,952
Total interest expense	24,921	11,573
Net interest income	68,778	62,436
Provision for loan losses	4,885	4,139
Net interest income after provision for loan losses	63,893	58,297
Noninterest income:
Securities gains (losses)		4
Increase in cash surrender value life insurance	762	777
Other operating income	327	276
Total noninterest income	4,942	4,415
Non-interest expenses:
Salaries and employee benefits	14,265	13,296
Equipment and occupancy expense	2,259	1,954
Professional services	994	805
FDIC and other regulatory assessments	1,019	1,133
Other real estate owned expense	22	316
Other operating expenses	6,767	5,554
Total non-interest expenses	25,326	23,058
Income before income taxes	43,509	39,654
Provision for income taxes	8,499	7,051
Net income	35,010	32,603
Dividends on preferred stock
Net income available to common stockholders	$ 35,010	$ 32,603
Basic earnings per common share (in dollars per share)	$ 0.65	$ 0.61
Diluted earnings per common share (in dollars per share)	$ 0.65	$ 0.60
Deposit Account [Member]
Noninterest income:
Noninterest income	$ 1,702	$ 1,585
Mortgage Banking [Member]
Noninterest income:
Noninterest income	575	518
Credit Card [Member]
Noninterest income:
Noninterest income	$ 1,576	$ 1,255

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income	$ 35,010	$ 32,603
Other comprehensive income (loss), net of tax:
Unrealized holding gains (losses) arising during period from securities available for sale, net of tax of $1,002 and $(1,340) for 2019 and 2018, respectively	3,772	(4,910)
Reclassification adjustment for net gains on sale of securities, net of tax of $1 for 2018		3
Other comprehensive income (loss), net of tax	3,772	(4,907)
Comprehensive income	$ 38,782	$ 27,696

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Unrealized holding gain (loss) from available for sale securities, tax	$ 1,002	$ (1,340)
Reclassification adjustment for net (gains) losses on sale of securities available-for-sale, 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, 2017		$ 53	$ 217,693	$ 389,554	$ (198)	$ 502	$ 607,604
Common dividends declared				(5,846)			(5,846)
Issue shares of common stock upon exercise of stock options			852				852
Shares of common stock withheld in net settlement upon exercise of stock options			(1,247)				(1,247)
Stock-based compensation expense			238				238
Other comprehensive income, net of tax					(4,907)		(4,907)
Net income				32,603			32,603
Balance at Mar. 31, 2018		53	217,536	416,311	(5,105)	502	629,297
Balance at Dec. 31, 2018		53	218,521	500,868	(4,741)	502	715,203	[1]
Common dividends declared				(8,025)			(8,025)
Issue shares of common stock upon exercise of stock options			797				797
Shares of common stock withheld in net settlement upon exercise of stock options			(1,453)				(1,453)
Stock-based compensation expense			282				282
Other comprehensive income, net of tax					3,772		3,772
Net income				35,010			35,010
Balance at Mar. 31, 2019		$ 53	$ 218,147	$ 527,853	$ (969)	$ 502	$ 745,586
[1]	Derived from audited financial statements.

Consolidated Statement of Sto_2

Consolidated Statement of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Common Stock [Member]
Issuance of common stock, shares (in shares)	117,313	143,833
Additional Paid-in Capital [Member]
Shares withholed in net settlement upon exercise of stock options (in shares)	45,187	30,003
Common dividends, per share declared (in dollars per share)	$ 0.15	$ 0.11

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
Net income	$ 35,010	$ 32,603
Adjustments to reconcile net income to net cash provided by
Deferred tax expense	1,068	1,554
Provision for loan losses	4,885	4,139
Depreciation	917	832
Accretion on acquired loans	(91)	(72)
Amortization of core deposit intangible	68	67
Net amortization of debt securities available for sale	626	623
(Increase) decrease in accrued interest and dividends receivable	(2,928)	400
Stock-based compensation expense	282	238
Increase in accrued interest payable	1,095	2,852
Proceeds from sale of mortgage loans held for sale	15,581	24,720
Originations of mortgage loans held for sale	(16,109)	(24,265)
Net gain on sale of debt securities available for sale		(4)
Gain on sale of mortgage loans held for sale	(575)	(518)
Net loss on sale of other real estate owned and repossessed assets	2
Write down of other real estate owned and repossessed assets	20	254
Operating losses of tax credit partnerships	35	29
Increase in cash surrender value of life insurance contracts	(762)	(777)
Net change in other assets, liabilities, and other operating activities	2,550	(3,790)
Net cash provided by operating activities	41,674	38,885
INVESTMENT ACTIVITIES
Purchase of securities available for sale	(65,507)	(54,666)
Proceeds from maturities, calls and paydowns of securities available for sale	28,469	20,376
Proceeds from sale of debt securities available for sale		5,100
Purchase of debt securities held to maturity	(250)
Increase in loans	(129,977)	(78,664)
Purchase of premises and equipment	(759)	(556)
Proceeds from sale of other real estate owned and repossessed assets	48	874
Net cash used in investing activities	(167,976)	(107,536)
FINANCING ACTIVITIES
Net increase (decrease) in non-interest-bearing deposits	15,362	(32,734)
Net increase (decrease) in interest-bearing deposits	152,596	(81,553)
Net increase in federal funds purchased	84,653	24,602
Repayment of Federal Home Loan Bank advances		(100)
Proceeds from exercise of stock options	797	852
Taxes paid in net settlement of tax obligation upon exercise of stock options	(1,453)	(1,247)
Dividends paid on common stock	(8,019)	(2,650)
Net cash provided by (used in) financing activities	243,936	(92,830)
Net increase (decrease) in cash and cash equivalents	117,634	(161,481)
Cash and cash equivalents at beginning of period	681,895	477,586
Cash and cash equivalents at end of period	799,529	316,105
Cash paid for:
Interest	23,826	8,721
Income taxes	1,533	2,902
NONCASH TRANSACTIONS
Other real estate acquired in settlement of loans	381	175
Dividends declared	$ 8,025	$ 5,846

Note 1 - General

Note 1 - General	3 Months Ended
	Mar. 31, 2019
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, 2018. All reported amounts are in thousands except share and per share data. Leases The Company leases certain office space and equipment under operating leases. Accounting Standards Update 2016 02, Leases (Topic 842 January 1, 2019 Certain of the leases include one one five not not None January 1, 2019. The Company has made an accounting policy election to not 2016 02 1 2 3

Note 2 - Cash and Cash Equivale

Note 2 - Cash and Cash Equivalents	3 Months Ended
	Mar. 31, 2019
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, 2019
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, 2019 2018 (In Thousands, Except Shares and Earnings per common share Weighted average common shares outstanding 53,465,091 53,082,322 Net income available to common stockholders $ 35,010 $ 32,603 Basic earnings per common share $ 0.65 $ 0.61 Weighted average common shares outstanding 53,465,091 53,082,322 Dilutive effects of assumed conversions and exercise of stock options and warrants 611,447 1,101,078 Weighted average common and dilutive potential common shares outstanding 54,076,538 54,183,400 Net income available to common stockholders $ 35,010 $ 32,603 Diluted earnings per common share $ 0.65 $ 0.60

Note 4 - Securities

Note 4 - Securities	3 Months Ended
	Mar. 31, 2019
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, 2019 December 31, 2018 Amortized Gross Gross Fair Value March 31, 2019 (In Thousands) Available for sale debt securities U.S. Treasury and government sponsored agencies $ 74,285 $ 126 $ (330 ) $ 74,081 Mortgage-backed securities 330,444 1,392 (2,460 ) 329,376 State and municipal securities 96,438 280 (250 ) 96,468 Corporate debt 131,802 508 (539 ) 131,771 Total $ 632,969 $ 2,306 $ (3,579 ) $ 631,696 Held to maturity debt securities State and municipal securities $ 250 $ – $ – $ 250 Total $ 250 $ – $ – $ 250 December 31, 2018 Available for sale debt securities U.S. Treasury and government sponsored agencies $ 77,534 $ 78 $ (619 ) $ 76,993 Mortgage-backed securities 309,244 591 (5,531 ) 304,304 State and municipal securities 106,465 208 (679 ) 105,994 Corporate debt 102,982 668 (757 ) 102,893 Total $ 596,225 $ 1,545 $ (7,586 ) $ 590,184 The amortized cost and fair value of debt securities as of March 31, 2019 December 31, 2018 may may not March 31, 2019 December 31, 2018 Amortized Fair Value Amortized Fair Value (In thousands) Available for sale debt securities Due within one year $ 35,222 $ 35,168 $ 38,343 $ 38,225 Due from one to five years 170,094 169,701 167,873 166,380 Due from five to ten years 94,404 94,605 77,811 78,276 Due after ten years 2,805 2,846 2,954 2,999 Mortgage-backed securities 330,444 329,376 309,244 304,304 $ 632,969 $ 631,696 $ 596,225 $ 590,184 Held to maturity debt securities Due from one to five years $ 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, 2019 December 31, 2018, 12 12 March 31, 2019, 328 752 12 not not not may not March 31, 2019. not Less Than Twelve Months Twelve Months or More Total Gross Fair Value Gross Fair Value Gross Fair Value (In Thousands) March 31, 2019 U.S. Treasury and government sponsored agencies $ (5 ) $ 1,003 $ (325 ) $ 47,913 $ (330 ) $ 48,916 Mortgage-backed securities (203 ) 40,066 (2,257 ) 187,872 (2,460 ) 227,938 State and municipal securities (24 ) 4,394 (226 ) 41,231 (250 ) 45,625 Corporate debt (238 ) 33,466 (301 ) 25,191 (539 ) 58,657 Total $ (470 ) $ 78,929 $ (3,109 ) $ 302,207 $ (3,579 ) $ 381,136 December 31, 2018 U.S. Treasury and government sponsored agencies $ (8 ) $ 1,001 $ (611 ) $ 50,878 $ (619 ) $ 51,880 Mortgage-backed securities (539 ) 67,721 (4,992 ) 204,260 (5,531 ) 271,981 State and municipal securities (101 ) 20,821 (578 ) 52,190 (679 ) 73,011 Corporate debt (315 ) 36,245 (442 ) 13,474 (757 ) 49,718 Total $ (963 ) $ 125,788 $ (6,623 ) $ 320,802 $ (7,586 ) $ 446,590 The carrying value of investment securities pledged to secure public funds on deposit and for other purposes as required by law was $314.4 $291.6 March 31, 2019 December 31, 2018,

Note 5 - Loans

Note 5 - Loans	3 Months Ended
	Mar. 31, 2019
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, 2019 December 31, 2018: March 31, December 31, (Dollars In Thousands) Commercial, financial and agricultural $ 2,522,136 $ 2,513,225 Real estate - construction 556,219 533,192 Real estate - mortgage: Owner-occupied commercial 1,500,595 1,463,887 1-4 family mortgage 629,285 621,634 Other mortgage 1,394,611 1,337,068 Subtotal: Real estate - mortgage 3,524,491 3,422,589 Consumer 57,062 64,493 Total Loans 6,659,908 6,533,499 Less: Allowance for loan losses (70,207 ) (68,600 ) Net Loans $ 6,589,701 $ 6,464,899 Commercial, financial and agricultural 37.87 % 38.47 % Real estate - construction 8.35 % 8.16 % Real estate - mortgage: Owner-occupied commercial 22.53 % 22.41 % 1-4 family mortgage 9.45 % 9.51 % Other mortgage 20.94 % 20.46 % Subtotal: Real estate - mortgage 52.92 % 52.38 % Consumer 0.86 % 0.99 % 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, 2019 December 31, 2018 March 31, 2019 Pass Special Mention Substandard Doubtful Total (In Thousands) Commercial, financial and agricultural $ 2,456,885 $ 47,075 $ 18,176 $ – $ 2,522,136 Real estate - construction 548,656 6,944 619 – 556,219 Real estate - mortgage: Owner-occupied commercial 1,470,108 26,929 3,558 – 1,500,595 1-4 family mortgage 625,458 1,976 1,851 – 629,285 Other mortgage 1,368,451 14,781 11,379 – 1,394,611 Total real estate - mortgage 3,464,017 43,686 16,788 – 3,524,491 Consumer 57,013 49 – – 57,062 Total $ 6,526,571 $ 97,754 $ 35,583 $ – $ 6,659,908 December 31, 2018 Pass Special Substandard Doubtful Total (In Thousands) Commercial, financial and agricultural $ 2,447,052 $ 47,754 $ 18,419 $ – $ 2,513,225 Real estate - construction 525,021 6,749 1,422 – 533,192 Real estate - mortgage: Owner-occupied commercial 1,431,982 28,547 3,358 – 1,463,887 1-4 family mortgage 616,884 2,703 2,047 – 621,634 Other mortgage 1,309,101 16,506 11,461 – 1,337,068 Total real estate - mortgage 3,357,967 47,756 16,866 – 3,422,589 Consumer 64,444 – 49 – 64,493 Total $ 6,394,484 $ 102,259 $ 36,756 $ – $ 6,533,499 Loans by performance status as of March 31, 2019 December 31, 2018 March 31, 2019 Performing Nonperforming Total (In Thousands) Commercial, financial and agricultural $ 2,510,619 $ 11,517 $ 2,522,136 Real estate - construction 555,981 238 556,219 Real estate - mortgage: Owner-occupied commercial 1,497,037 3,558 1,500,595 1-4 family mortgage 627,435 1,850 629,285 Other mortgage 1,384,611 10,000 1,394,611 Total real estate - mortgage 3,509,083 15,408 3,524,491 Consumer 57,050 12 57,062 Total $ 6,632,733 $ 27,175 $ 6,659,908 December 31, 2018 Performing Nonperforming Total (In Thousands) Commercial, financial and agricultural $ 2,502,117 $ 11,108 $ 2,513,225 Real estate - construction 532,195 997 533,192 Real estate - mortgage: Owner-occupied commercial 1,460,529 3,358 1,463,887 1-4 family mortgage 619,465 2,169 621,634 Other mortgage 1,327,038 10,030 1,337,068 Total real estate - mortgage 3,407,032 15,557 3,422,589 Consumer 64,385 108 64,493 Total $ 6,505,729 $ 27,770 $ 6,533,499 Loans by past due status as of March 31, 2019 December 31, 2018 March 31, 2019 Past Due Status (Accruing Loans) 30-59 Days 60-89 Days 90+ Days Total Past Non-Accrual Current Total Loans (In Thousands) Commercial, financial and agricultural $ 6,868 $ 2,115 $ 31 $ 9,014 $ 11,486 $ 2,501,636 $ 2,522,136 Real estate - construction – – – – 238 555,981 556,219 Real estate - mortgage: Owner-occupied commercial 122 – – 122 3,558 1,496,915 1,500,595 1-4 family mortgage 600 649 – 1,249 1,850 626,186 629,285 Other mortgage 37 – 4,978 5,015 5,022 1,384,574 1,394,611 Total real estate - mortgage 759 649 4,978 6,386 10,430 3,507,675 3,524,491 Consumer 41 12 12 65 – 56,997 57,062 Total $ 7,668 $ 2,776 $ 5,021 $ 15,465 $ 22,154 $ 6,622,289 $ 6,659,908 December 31, 2018 Past Due Status (Accruing Loans) 30-59 Days 60-89 Days 90+ Days Total Past Non-Accrual Current Total Loans (In Thousands) Commercial, financial and agricultural $ 1,222 $ 48 $ 605 $ 1,875 $ 10,503 $ 2,500,847 $ 2,513,225 Real estate - construction – 1,352 – 1,352 997 530,843 533,192 Real estate - mortgage: Owner-occupied commercial 412 – – 412 3,358 1,460,117 1,463,887 1-4 family mortgage 534 235 123 892 2,046 618,696 621,634 Other mortgage 1,174 – 5,008 6,182 5,022 1,325,864 1,337,068 Total real estate - mortgage 2,120 235 5,131 7,486 10,426 3,404,677 3,422,589 Consumer 58 123 108 289 – 64,204 64,493 Total $ 3,400 $ 1,758 $ 5,844 $ 11,002 $ 21,926 $ 6,500,571 $ 6,533,499 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, 2019 March 31, 2018. Commercial, Real estate - construction Real estate - mortgage Consumer Total (In Thousands) Three Months Ended March 31, 2019 Allowance for loan losses: Balance at December 31, 2018 $ 39,016 $ 3,522 $ 25,508 $ 554 $ 68,600 Charge-offs (3,037 ) – (50 ) (218 ) (3,305 ) Recoveries 12 1 7 7 27 Provision 3,468 72 1,246 99 4,885 Balance at March 31, 2019 $ 39,459 $ 3,595 $ 26,711 $ 442 $ 70,207 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 As of March 31, 2019 Allowance for loan losses: Individually Evaluated for Impairment $ 5,192 $ 110 $ 1,987 $ – $ 7,289 Collectively Evaluated for Impairment 34,267 3,485 24,724 442 62,918 Loans: Ending Balance $ 2,522,136 $ 556,219 $ 3,524,491 $ 57,062 $ 6,659,908 Individually Evaluated for Impairment 18,197 656 17,891 49 36,793 Collectively Evaluated for Impairment 2,503,939 555,563 3,506,600 57,013 6,623,115 As of December 31, 2018 Allowance for loan losses: Individually Evaluated for Impairment $ 6,066 $ 126 $ 1,887 $ 49 $ 8,128 Collectively Evaluated for Impairment 32,950 3,396 23,621 505 60,472 Loans: Ending Balance $ 2,513,225 $ 533,192 $ 3,422,589 $ 64,493 $ 6,533,499 Individually Evaluated for Impairment 18,444 1,461 18,637 49 38,591 Collectively Evaluated for Impairment 2,494,781 531,731 3,403,952 64,444 6,494,908 The following table presents details of the Company’s impaired loans as of March 31, 2019 December 31, 2018, not March 31, 2019 For the three months Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest (In Thousands) With no allowance recorded: Commercial, financial and agricultural $ 5,447 $ 5,947 $ – $ 5,947 $ 49 Real estate - construction 418 421 – 454 7 Real estate - mortgage: Owner-occupied commercial 1,096 1,192 – 1,102 16 1-4 family mortgage 597 597 – 622 (1 ) Other mortgage 4,978 4,978 – 4,992 61 Total real estate - mortgage 6,671 6,767 – 6,716 76 Consumer – – – – – Total with no allowance recorded 12,536 13,135 – 13,117 132 With an allowance recorded: Commercial, financial and agricultural 12,750 22,855 5,192 15,416 30 Real estate - construction 238 238 110 364 – Real estate - mortgage: Owner-occupied commercial 3,558 3,558 106 3,558 (1 ) 1-4 family mortgage 1,253 1,253 301 1,253 – Other mortgage 6,409 6,409 1,580 6,409 15 Total real estate - mortgage 11,220 11,220 1,987 11,220 14 Consumer 49 49 – 49 1 Total with allowance recorded 24,257 34,362 7,289 27,049 45 Total Impaired Loans: Commercial, financial and agricultural 18,197 28,802 5,192 21,363 79 Real estate - construction 656 659 110 818 7 Real estate - mortgage: Owner-occupied commercial 4,654 4,750 106 4,660 15 1-4 family mortgage 1,850 1,850 301 1,875 (1 ) Other mortgage 11,387 11,387 1,580 11,401 76 Total real estate - mortgage 17,891 17,987 1,987 17,936 90 Consumer 49 49 – 49 1 Total impaired loans $ 36,793 $ 47,497 $ 7,289 $ 40,166 $ 177 December 31, 2018 For the twelve months Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest (In Thousands) With no allowance recorded: Commercial, financial and agricultural $ 6,064 $ 6,064 $ – $ 6,142 $ 237 Real estate - construction 464 467 – 524 28 Real estate - mortgage: Owner-occupied commercial 1,763 1,947 – 2,223 120 1-4 family mortgage 1,071 1,071 – 1,088 21 Other mortgage 5,061 5,061 – 5,133 252 Total real estate - mortgage 7,895 8,079 – 8,444 393 Consumer – – – – – Total with no allowance recorded 14,423 14,610 – 15,110 658 With an allowance recorded: Commercial, financial and agricultural 12,380 20,141 6,066 15,918 462 Real estate - construction 997 997 126 997 31 Real estate - mortgage: Owner-occupied commercial 3,358 3,358 99 3,364 105 1-4 family mortgage 975 975 208 975 30 Other mortgage 6,409 6,409 1,580 6,598 217 Total real estate - mortgage 10,742 10,742 1,887 10,937 352 Consumer 49 49 49 49 3 Total with allowance recorded 24,168 31,929 8,128 27,901 848 Total Impaired Loans: Commercial, financial and agricultural 18,444 26,205 6,066 22,060 699 Real estate - construction 1,461 1,464 126 1,521 59 Real estate - mortgage: Owner-occupied commercial 5,121 5,305 99 5,587 225 1-4 family mortgage 2,046 2,046 208 2,063 51 Other mortgage 11,470 11,470 1,580 11,731 469 Total real estate - mortgage 18,637 18,821 1,887 19,381 745 Consumer 49 49 49 49 3 Total impaired loans $ 38,591 $ 46,539 $ 8,128 $ 43,011 $ 1,506 Troubled Debt Restructurings (“TDR”) at March 31, 2019, December 31, 2018 March 31, 2018 $12.3 $14.6 $18.8 March 31, 2019, December 31, 2018 March 31, 2018 $2.7 $3.1 $15.8 March 31, 2019, $2.6 $4.3 December 31, 2018 $5.1 March 31, 2018. no three March 31, 2019 2018. There were two $0.3 twelve twelve three March 31, 2019. no twelve three March 31, 2018. 90

Note 6 - Leases

Note 6 - Leases	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	NOTE 6 The Company leases space under non-cancelable operating leases for several of its banking offices and certain office equipment. The leases have remaining terms up to 10 March 31, 2019, $14.7 Maturities of operating lease liabilities as of March 31, 2019 March 31, 2019 (In Thousands) 2019 (remaining) $ 2,397 2020 3,134 2021 2,487 2022 2,509 2023 2,088 thereafter 3,701 Total lease payments 16,316 Less: imputed interest (1,637 ) Present value of operating lease liabilities $ 14,679 As of March 31, 2019 6.2 5.00%. An initial right-of-use asset of $15.3 January 1, 2019. $0.4 first 2019. $0.8 first 2019 Operating lease costs were $0.9 first 2019. $0.1 first 2019. $7,000 first 2019. $0.7 first 2018.

Note 7 - Employee and Director

Note 7 - Employee and Director Benefits	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	NOTE 7 Stock Options At March 31, 2019, $0.3 $0.2 three March 31, 2019 2018, The Company’s 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. 2019 2018 Expected volatility 40.00 % 23.43 % Expected dividends 1.76 % 1.07 % Expected term (in years) 6.3 6.3 Risk-free rate 2.61 % 2.67 % The weighted average grant-date fair value of options granted during the three March 31, 2019 2018 $12.20 $10.41, The following table summarizes stock option activity during the three March 31, 2019 2018: Weighted (In Thousands) Three Months Ended March 31, 2019: Outstanding January 1, 2019 1,238,748 $ 13.02 5.2 $ 23,355 Granted 6,000 34.09 9.8 (2 ) Exercised (162,500 ) 4.59 1.7 4,384 Forfeited – – – – Outstanding March 31, 2019 1,082,248 14.41 6.3 $ 21,318 Exercisable March 31, 2019 354,800 $ 8.40 4.0 $ 9,356 Three Months Ended March 31, 2018: Outstanding 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 March 31, 2018 1,502,248 11.54 5.5 $ 43,978 Exercisable March 31, 2018 672,600 $ 5.48 3.9 $ 23,770 As of March 31, 2019, $1.6 1.8 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. There were 15,200 first 2019. 10,750 first 2018. March 31, 2019, $1.2 March 31, 2019, 3.2

Note 8 - Derivatives

Note 8 - Derivatives	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]	NOTE 8 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, 2019 December 31, 2018 not

Note 9 - Recently Adopted Accou

Note 9 - Recently Adopted Accounting Pronouncements	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	NOTE 9 In February 2016, 2016 02, Leases (Topic 842 January 1, 2019. three 1 2 3 January 1, 2019, $15.3 not no 6 In June 2018, 2018 07, Compensation – Stock Compensation (Topic 718 718, 505 50, January 1, 2019. not not In March 2017, 2017 08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310 20 not January 1, 2019. not first

Note 10 - Recent Accounting Pro

Note 10 - Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Accounting Changes and Error Corrections [Text Block]	NOTE 10 In June 2016, 2016 13, Financial Instruments-Credit Losses (Topic 326 December 15, 2019, December 15, 2018. third 2019. In July 2018, 2018 13, Fair Value Measurement (Topic 820 no 1 2 3 No. 2018 13 December 15, 2019; No. 2018 13 not

Note 11 - Fair Value Measuremen

Note 11 - Fair Value Measurement	3 Months Ended
	Mar. 31, 2019
Notes to Financial Statements
Fair Value Disclosures [Text Block]	NOTE 11 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 820 10. 3 $1.9 three March 31, 2019, $2.3 three March 31, 2018. Other Real Estate Owned not 3 $22,000 $254,000 three March 31, 2019 2018, 3 There was one $340,000 March 31, 2019. $360,000 December 31, 2018. No March 31, 2019 one $173,000 December 31, 2018. The following table presents the Company’s financial assets carried at fair value on a recurring basis as of March 31, 2019 December 31, 2018. no March 31, 2019 December 31, 2018. Fair Value Measurements at March 31, 2019 Using Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets Measured on a Recurring Basis: (In Thousands) Available for sale debt securities: U.S. Treasury and government sponsored agencies $ – $ 74,081 $ – $ 74,081 Mortgage-backed securities – 329,376 – 329,376 State and municipal securities – 96,468 – 96,468 Corporate debt – 125,268 6,503 131,771 Total assets at fair value $ – $ 625,193 $ 6,503 $ 631,696 Fair Value Measurements at December 31, 2018 Using Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets Measured on a Recurring Basis: (In Thousands) Available for sale debt securities: U.S. Treasury and government sponsored agencies $ – $ 76,993 $ – $ 76,993 Mortgage-backed securities – 304,304 – 304,304 State and municipal securities – 105,994 – 105,994 Corporate debt – 96,375 6,518 102,893 Total assets at fair value $ – $ 583,666 $ 6,518 $ 590,184 The following table presents the Company’s financial assets carried at fair value on a nonrecurring basis as of March 31, 2019 December 31, 2018. no March 31, 2019 December 31, 2018. Fair Value Measurements at March 31, 2019 Using Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets Measured on a Nonrecurring Basis: (In Thousands) Impaired loans $ – $ – $ 29,504 $ 29,504 Other real estate owned and repossessed assets – – 5,480 5,480 Total assets at fair value $ – $ – $ 34,984 $ 34,984 Fair Value Measurements at December 31, 2018 Using Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets Measured on a Nonrecurring Basis: (In Thousands) Impaired loans $ – $ – $ 30,463 $ 30,463 Other real estate owned – – 5,169 5,169 Total assets at fair value $ – $ – $ 35,632 $ 35,632 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 estimated fair values of the Company’s financial instruments not March 31, 2019 December 31, 2018 March 31, 2019 December 31, 2018 Carrying Fair Value Carrying Fair Value (In Thousands) Financial Assets: Level 1 inputs: Cash and cash equivalents $ 618,094 $ 618,094 $ 458,050 $ 458,050 Level 2 inputs: Federal funds sold 181,435 181,435 223,845 223,845 Mortgage loans held for sale 1,223 1,251 120 121 Level 3 Inputs: Held to maturity debt securities 250 250 – – Loans, net 6,589,701 6,555,511 6,464,899 6,398,604 Financial Liabilities: Level 2 inputs: Deposits $ 7,083,666 $ 7,082,114 $ 6,915,708 $ 6,910,176 Federal funds purchased 373,378 373,378 288,725 288,725 Other borrowings 64,675 64,618 64,666 64,613

Note 3 - Earnings Per Common _2

Note 3 - Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended March 31, 2019 2018 (In Thousands, Except Shares and Earnings per common share Weighted average common shares outstanding 53,465,091 53,082,322 Net income available to common stockholders $ 35,010 $ 32,603 Basic earnings per common share $ 0.65 $ 0.61 Weighted average common shares outstanding 53,465,091 53,082,322 Dilutive effects of assumed conversions and exercise of stock options and warrants 611,447 1,101,078 Weighted average common and dilutive potential common shares outstanding 54,076,538 54,183,400 Net income available to common stockholders $ 35,010 $ 32,603 Diluted earnings per common share $ 0.65 $ 0.60

Note 4 - Securities (Tables)

Note 4 - Securities (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Unrealized Gain (Loss) on Investments [Table Text Block]	Amortized Gross Gross Fair Value March 31, 2019 (In Thousands) Available for sale debt securities U.S. Treasury and government sponsored agencies $ 74,285 $ 126 $ (330 ) $ 74,081 Mortgage-backed securities 330,444 1,392 (2,460 ) 329,376 State and municipal securities 96,438 280 (250 ) 96,468 Corporate debt 131,802 508 (539 ) 131,771 Total $ 632,969 $ 2,306 $ (3,579 ) $ 631,696 Held to maturity debt securities State and municipal securities $ 250 $ – $ – $ 250 Total $ 250 $ – $ – $ 250 December 31, 2018 Available for sale debt securities U.S. Treasury and government sponsored agencies $ 77,534 $ 78 $ (619 ) $ 76,993 Mortgage-backed securities 309,244 591 (5,531 ) 304,304 State and municipal securities 106,465 208 (679 ) 105,994 Corporate debt 102,982 668 (757 ) 102,893 Total $ 596,225 $ 1,545 $ (7,586 ) $ 590,184
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	March 31, 2019 December 31, 2018 Amortized Fair Value Amortized Fair Value (In thousands) Available for sale debt securities Due within one year $ 35,222 $ 35,168 $ 38,343 $ 38,225 Due from one to five years 170,094 169,701 167,873 166,380 Due from five to ten years 94,404 94,605 77,811 78,276 Due after ten years 2,805 2,846 2,954 2,999 Mortgage-backed securities 330,444 329,376 309,244 304,304 $ 632,969 $ 631,696 $ 596,225 $ 590,184 Held to maturity debt securities Due from one to five years $ 250 $ 250 $ – $ – $ 250 $ 250 $ – $ –
Gain (Loss) on Securities [Table Text Block]	Less Than Twelve Months Twelve Months or More Total Gross Fair Value Gross Fair Value Gross Fair Value (In Thousands) March 31, 2019 U.S. Treasury and government sponsored agencies $ (5 ) $ 1,003 $ (325 ) $ 47,913 $ (330 ) $ 48,916 Mortgage-backed securities (203 ) 40,066 (2,257 ) 187,872 (2,460 ) 227,938 State and municipal securities (24 ) 4,394 (226 ) 41,231 (250 ) 45,625 Corporate debt (238 ) 33,466 (301 ) 25,191 (539 ) 58,657 Total $ (470 ) $ 78,929 $ (3,109 ) $ 302,207 $ (3,579 ) $ 381,136 December 31, 2018 U.S. Treasury and government sponsored agencies $ (8 ) $ 1,001 $ (611 ) $ 50,878 $ (619 ) $ 51,880 Mortgage-backed securities (539 ) 67,721 (4,992 ) 204,260 (5,531 ) 271,981 State and municipal securities (101 ) 20,821 (578 ) 52,190 (679 ) 73,011 Corporate debt (315 ) 36,245 (442 ) 13,474 (757 ) 49,718 Total $ (963 ) $ 125,788 $ (6,623 ) $ 320,802 $ (7,586 ) $ 446,590

Note 5 - Loans (Tables)

Note 5 - Loans (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	March 31, December 31, (Dollars In Thousands) Commercial, financial and agricultural $ 2,522,136 $ 2,513,225 Real estate - construction 556,219 533,192 Real estate - mortgage: Owner-occupied commercial 1,500,595 1,463,887 1-4 family mortgage 629,285 621,634 Other mortgage 1,394,611 1,337,068 Subtotal: Real estate - mortgage 3,524,491 3,422,589 Consumer 57,062 64,493 Total Loans 6,659,908 6,533,499 Less: Allowance for loan losses (70,207 ) (68,600 ) Net Loans $ 6,589,701 $ 6,464,899 Commercial, financial and agricultural 37.87 % 38.47 % Real estate - construction 8.35 % 8.16 % Real estate - mortgage: Owner-occupied commercial 22.53 % 22.41 % 1-4 family mortgage 9.45 % 9.51 % Other mortgage 20.94 % 20.46 % Subtotal: Real estate - mortgage 52.92 % 52.38 % Consumer 0.86 % 0.99 % Total Loans 100.00 % 100.00 %
Financing Receivable Credit Quality Indicators [Table Text Block]	March 31, 2019 Pass Special Mention Substandard Doubtful Total (In Thousands) Commercial, financial and agricultural $ 2,456,885 $ 47,075 $ 18,176 $ – $ 2,522,136 Real estate - construction 548,656 6,944 619 – 556,219 Real estate - mortgage: Owner-occupied commercial 1,470,108 26,929 3,558 – 1,500,595 1-4 family mortgage 625,458 1,976 1,851 – 629,285 Other mortgage 1,368,451 14,781 11,379 – 1,394,611 Total real estate - mortgage 3,464,017 43,686 16,788 – 3,524,491 Consumer 57,013 49 – – 57,062 Total $ 6,526,571 $ 97,754 $ 35,583 $ – $ 6,659,908 December 31, 2018 Pass Special Substandard Doubtful Total (In Thousands) Commercial, financial and agricultural $ 2,447,052 $ 47,754 $ 18,419 $ – $ 2,513,225 Real estate - construction 525,021 6,749 1,422 – 533,192 Real estate - mortgage: Owner-occupied commercial 1,431,982 28,547 3,358 – 1,463,887 1-4 family mortgage 616,884 2,703 2,047 – 621,634 Other mortgage 1,309,101 16,506 11,461 – 1,337,068 Total real estate - mortgage 3,357,967 47,756 16,866 – 3,422,589 Consumer 64,444 – 49 – 64,493 Total $ 6,394,484 $ 102,259 $ 36,756 $ – $ 6,533,499
Financing Receivable, Credit Substitute, Credit Quality Indicator [Table Text Block]	March 31, 2019 Performing Nonperforming Total (In Thousands) Commercial, financial and agricultural $ 2,510,619 $ 11,517 $ 2,522,136 Real estate - construction 555,981 238 556,219 Real estate - mortgage: Owner-occupied commercial 1,497,037 3,558 1,500,595 1-4 family mortgage 627,435 1,850 629,285 Other mortgage 1,384,611 10,000 1,394,611 Total real estate - mortgage 3,509,083 15,408 3,524,491 Consumer 57,050 12 57,062 Total $ 6,632,733 $ 27,175 $ 6,659,908 December 31, 2018 Performing Nonperforming Total (In Thousands) Commercial, financial and agricultural $ 2,502,117 $ 11,108 $ 2,513,225 Real estate - construction 532,195 997 533,192 Real estate - mortgage: Owner-occupied commercial 1,460,529 3,358 1,463,887 1-4 family mortgage 619,465 2,169 621,634 Other mortgage 1,327,038 10,030 1,337,068 Total real estate - mortgage 3,407,032 15,557 3,422,589 Consumer 64,385 108 64,493 Total $ 6,505,729 $ 27,770 $ 6,533,499
Financing Receivable, Past Due [Table Text Block]	March 31, 2019 Past Due Status (Accruing Loans) 30-59 Days 60-89 Days 90+ Days Total Past Non-Accrual Current Total Loans (In Thousands) Commercial, financial and agricultural $ 6,868 $ 2,115 $ 31 $ 9,014 $ 11,486 $ 2,501,636 $ 2,522,136 Real estate - construction – – – – 238 555,981 556,219 Real estate - mortgage: Owner-occupied commercial 122 – – 122 3,558 1,496,915 1,500,595 1-4 family mortgage 600 649 – 1,249 1,850 626,186 629,285 Other mortgage 37 – 4,978 5,015 5,022 1,384,574 1,394,611 Total real estate - mortgage 759 649 4,978 6,386 10,430 3,507,675 3,524,491 Consumer 41 12 12 65 – 56,997 57,062 Total $ 7,668 $ 2,776 $ 5,021 $ 15,465 $ 22,154 $ 6,622,289 $ 6,659,908 December 31, 2018 Past Due Status (Accruing Loans) 30-59 Days 60-89 Days 90+ Days Total Past Non-Accrual Current Total Loans (In Thousands) Commercial, financial and agricultural $ 1,222 $ 48 $ 605 $ 1,875 $ 10,503 $ 2,500,847 $ 2,513,225 Real estate - construction – 1,352 – 1,352 997 530,843 533,192 Real estate - mortgage: Owner-occupied commercial 412 – – 412 3,358 1,460,117 1,463,887 1-4 family mortgage 534 235 123 892 2,046 618,696 621,634 Other mortgage 1,174 – 5,008 6,182 5,022 1,325,864 1,337,068 Total real estate - mortgage 2,120 235 5,131 7,486 10,426 3,404,677 3,422,589 Consumer 58 123 108 289 – 64,204 64,493 Total $ 3,400 $ 1,758 $ 5,844 $ 11,002 $ 21,926 $ 6,500,571 $ 6,533,499
Financing Receivable, Allowance for Credit Loss [Table Text Block]	Commercial, Real estate - construction Real estate - mortgage Consumer Total (In Thousands) Three Months Ended March 31, 2019 Allowance for loan losses: Balance at December 31, 2018 $ 39,016 $ 3,522 $ 25,508 $ 554 $ 68,600 Charge-offs (3,037 ) – (50 ) (218 ) (3,305 ) Recoveries 12 1 7 7 27 Provision 3,468 72 1,246 99 4,885 Balance at March 31, 2019 $ 39,459 $ 3,595 $ 26,711 $ 442 $ 70,207 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 As of March 31, 2019 Allowance for loan losses: Individually Evaluated for Impairment $ 5,192 $ 110 $ 1,987 $ – $ 7,289 Collectively Evaluated for Impairment 34,267 3,485 24,724 442 62,918 Loans: Ending Balance $ 2,522,136 $ 556,219 $ 3,524,491 $ 57,062 $ 6,659,908 Individually Evaluated for Impairment 18,197 656 17,891 49 36,793 Collectively Evaluated for Impairment 2,503,939 555,563 3,506,600 57,013 6,623,115 As of December 31, 2018 Allowance for loan losses: Individually Evaluated for Impairment $ 6,066 $ 126 $ 1,887 $ 49 $ 8,128 Collectively Evaluated for Impairment 32,950 3,396 23,621 505 60,472 Loans: Ending Balance $ 2,513,225 $ 533,192 $ 3,422,589 $ 64,493 $ 6,533,499 Individually Evaluated for Impairment 18,444 1,461 18,637 49 38,591 Collectively Evaluated for Impairment 2,494,781 531,731 3,403,952 64,444 6,494,908
Impaired Financing Receivables [Table Text Block]	March 31, 2019 For the three months Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest (In Thousands) With no allowance recorded: Commercial, financial and agricultural $ 5,447 $ 5,947 $ – $ 5,947 $ 49 Real estate - construction 418 421 – 454 7 Real estate - mortgage: Owner-occupied commercial 1,096 1,192 – 1,102 16 1-4 family mortgage 597 597 – 622 (1 ) Other mortgage 4,978 4,978 – 4,992 61 Total real estate - mortgage 6,671 6,767 – 6,716 76 Consumer – – – – – Total with no allowance recorded 12,536 13,135 – 13,117 132 With an allowance recorded: Commercial, financial and agricultural 12,750 22,855 5,192 15,416 30 Real estate - construction 238 238 110 364 – Real estate - mortgage: Owner-occupied commercial 3,558 3,558 106 3,558 (1 ) 1-4 family mortgage 1,253 1,253 301 1,253 – Other mortgage 6,409 6,409 1,580 6,409 15 Total real estate - mortgage 11,220 11,220 1,987 11,220 14 Consumer 49 49 – 49 1 Total with allowance recorded 24,257 34,362 7,289 27,049 45 Total Impaired Loans: Commercial, financial and agricultural 18,197 28,802 5,192 21,363 79 Real estate - construction 656 659 110 818 7 Real estate - mortgage: Owner-occupied commercial 4,654 4,750 106 4,660 15 1-4 family mortgage 1,850 1,850 301 1,875 (1 ) Other mortgage 11,387 11,387 1,580 11,401 76 Total real estate - mortgage 17,891 17,987 1,987 17,936 90 Consumer 49 49 – 49 1 Total impaired loans $ 36,793 $ 47,497 $ 7,289 $ 40,166 $ 177 December 31, 2018 For the twelve months Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest (In Thousands) With no allowance recorded: Commercial, financial and agricultural $ 6,064 $ 6,064 $ – $ 6,142 $ 237 Real estate - construction 464 467 – 524 28 Real estate - mortgage: Owner-occupied commercial 1,763 1,947 – 2,223 120 1-4 family mortgage 1,071 1,071 – 1,088 21 Other mortgage 5,061 5,061 – 5,133 252 Total real estate - mortgage 7,895 8,079 – 8,444 393 Consumer – – – – – Total with no allowance recorded 14,423 14,610 – 15,110 658 With an allowance recorded: Commercial, financial and agricultural 12,380 20,141 6,066 15,918 462 Real estate - construction 997 997 126 997 31 Real estate - mortgage: Owner-occupied commercial 3,358 3,358 99 3,364 105 1-4 family mortgage 975 975 208 975 30 Other mortgage 6,409 6,409 1,580 6,598 217 Total real estate - mortgage 10,742 10,742 1,887 10,937 352 Consumer 49 49 49 49 3 Total with allowance recorded 24,168 31,929 8,128 27,901 848 Total Impaired Loans: Commercial, financial and agricultural 18,444 26,205 6,066 22,060 699 Real estate - construction 1,461 1,464 126 1,521 59 Real estate - mortgage: Owner-occupied commercial 5,121 5,305 99 5,587 225 1-4 family mortgage 2,046 2,046 208 2,063 51 Other mortgage 11,470 11,470 1,580 11,731 469 Total real estate - mortgage 18,637 18,821 1,887 19,381 745 Consumer 49 49 49 49 3 Total impaired loans $ 38,591 $ 46,539 $ 8,128 $ 43,011 $ 1,506

Note 6 - Leases (Tables)

Note 6 - Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	March 31, 2019 (In Thousands) 2019 (remaining) $ 2,397 2020 3,134 2021 2,487 2022 2,509 2023 2,088 thereafter 3,701 Total lease payments 16,316 Less: imputed interest (1,637 ) Present value of operating lease liabilities $ 14,679

Note 7 - Employee and Directo_2

Note 7 - Employee and Director Benefits (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	2019 2018 Expected volatility 40.00 % 23.43 % Expected dividends 1.76 % 1.07 % Expected term (in years) 6.3 6.3 Risk-free rate 2.61 % 2.67 %
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Weighted (In Thousands) Three Months Ended March 31, 2019: Outstanding January 1, 2019 1,238,748 $ 13.02 5.2 $ 23,355 Granted 6,000 34.09 9.8 (2 ) Exercised (162,500 ) 4.59 1.7 4,384 Forfeited – – – – Outstanding March 31, 2019 1,082,248 14.41 6.3 $ 21,318 Exercisable March 31, 2019 354,800 $ 8.40 4.0 $ 9,356 Three Months Ended March 31, 2018: Outstanding 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 March 31, 2018 1,502,248 11.54 5.5 $ 43,978 Exercisable March 31, 2018 672,600 $ 5.48 3.9 $ 23,770

Note 11 - Fair Value Measurem_2

Note 11 - Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2019
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Fair Value Measurements at March 31, 2019 Using Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets Measured on a Recurring Basis: (In Thousands) Available for sale debt securities: U.S. Treasury and government sponsored agencies $ – $ 74,081 $ – $ 74,081 Mortgage-backed securities – 329,376 – 329,376 State and municipal securities – 96,468 – 96,468 Corporate debt – 125,268 6,503 131,771 Total assets at fair value $ – $ 625,193 $ 6,503 $ 631,696 Fair Value Measurements at December 31, 2018 Using Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets Measured on a Recurring Basis: (In Thousands) Available for sale debt securities: U.S. Treasury and government sponsored agencies $ – $ 76,993 $ – $ 76,993 Mortgage-backed securities – 304,304 – 304,304 State and municipal securities – 105,994 – 105,994 Corporate debt – 96,375 6,518 102,893 Total assets at fair value $ – $ 583,666 $ 6,518 $ 590,184
Fair Value Measurements, Nonrecurring [Table Text Block]	Fair Value Measurements at March 31, 2019 Using Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets Measured on a Nonrecurring Basis: (In Thousands) Impaired loans $ – $ – $ 29,504 $ 29,504 Other real estate owned and repossessed assets – – 5,480 5,480 Total assets at fair value $ – $ – $ 34,984 $ 34,984 Fair Value Measurements at December 31, 2018 Using Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Assets Measured on a Nonrecurring Basis: (In Thousands) Impaired loans $ – $ – $ 30,463 $ 30,463 Other real estate owned – – 5,169 5,169 Total assets at fair value $ – $ – $ 35,632 $ 35,632
Fair Value, by Balance Sheet Grouping [Table Text Block]	March 31, 2019 December 31, 2018 Carrying Fair Value Carrying Fair Value (In Thousands) Financial Assets: Level 1 inputs: Cash and cash equivalents $ 618,094 $ 618,094 $ 458,050 $ 458,050 Level 2 inputs: Federal funds sold 181,435 181,435 223,845 223,845 Mortgage loans held for sale 1,223 1,251 120 121 Level 3 Inputs: Held to maturity debt securities 250 250 – – Loans, net 6,589,701 6,555,511 6,464,899 6,398,604 Financial Liabilities: Level 2 inputs: Deposits $ 7,083,666 $ 7,082,114 $ 6,915,708 $ 6,910,176 Federal funds purchased 373,378 373,378 288,725 288,725 Other borrowings 64,675 64,618 64,666 64,613

Note 1 - General (Details Textu

Note 1 - General (Details Textual)	Mar. 31, 2019
Minimum [Member]
Lessee, Operating Lease, Renewal Term	1 year
Maximum [Member]
Lessee, Operating Lease, Renewal Term	5 years

Note 3 - Earnings Per Common _3

Note 3 - Earnings Per Common Share - Summary of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Weighted average common shares outstanding (in shares)	53,465,091	53,082,322
Net income available to common stockholders	$ 35,010	$ 32,603
Basic earnings per common share (in dollars per share)	$ 0.65	$ 0.61
Dilutive effects of assumed conversions and exercise of stock options and warrants (in shares)	611,447	1,101,078
Weighted average common and dilutive potential common shares outstanding (in shares)	54,076,538	54,183,400
Net income available to common stockholders	$ 35,010	$ 32,603
Diluted earnings per common share (in dollars per share)	$ 0.65	$ 0.60

Note 4 - Securities (Details Te

Note 4 - Securities (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	328
Available for Sale Securities Debt Securities, Number of Positions	752
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Total	$ 0
Pledged Financial Instruments, Not Separately Reported, Securities, Total	$ 314,400	$ 291,600

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, 2019	Dec. 31, 2018
Available for sale, amortized cost	$ 632,969	$ 596,225
Available for sale, gross unrealized gain	2,306	1,545
Available for sale, gross unrealized loss	(3,579)	(7,586)
Available for sale, fair value	631,696	590,184	[1]
Held to maturity, amortized cost	250
Held to maturity, gross unrealized gain
Held to maturity, gross unrealized loss
Held to maturity debt securities, fair value	250		[2]
US Treasury and Government [Member]
Available for sale, amortized cost	74,285	77,534
Available for sale, gross unrealized gain	126	78
Available for sale, gross unrealized loss	(330)	(619)
Available for sale, fair value	74,081	76,993
Collateralized Mortgage Backed Securities [Member]
Available for sale, amortized cost	330,444	309,244
Available for sale, gross unrealized gain	1,392	591
Available for sale, gross unrealized loss	(2,460)	(5,531)
Available for sale, fair value	329,376	304,304
US States and Political Subdivisions Debt Securities [Member]
Available for sale, amortized cost	96,438	106,465
Available for sale, gross unrealized gain	280	208
Available for sale, gross unrealized loss	(250)	(679)
Available for sale, fair value	96,468	105,994
Held to maturity, amortized cost	250
Held to maturity, gross unrealized gain
Held to maturity, gross unrealized loss
Held to maturity debt securities, fair value	250
Corporate Debt Securities [Member]
Available for sale, amortized cost	131,802	102,982
Available for sale, gross unrealized gain	508	668
Available for sale, gross unrealized loss	(539)	(757)
Available for sale, fair value	$ 131,771	$ 102,893
[1]	Derived from audited financial statements.
[2]	Derived from audited financial statements.

Note 4 - Securities - Amortiz_2

Note 4 - Securities - Amortized Cost and Fair Value of Contractual Securities (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Due within one year, amortized cost		$ 35,222	$ 38,343
Due within one year, fair value		35,168	38,225
Due from one to five years, amortized cost		170,094	167,873
Due from one to five years, fair value		169,701	166,380
Due from five to ten years, amortized cost		94,404	77,811
Due from five to ten years, fair value		94,605	78,276
Due after ten years, amortized cost		2,805	2,954
Due after ten years, fair value		2,846	2,999
Mortgage-backed securities, amortized cost		330,444	309,244
Mortgage-backed securities, fair value		329,376	304,304
Available for sale, amortized cost		632,969	596,225
Available for sale, fair value		631,696	590,184	[1]
Due from one to five years, amortized cost		250
Due from one to five years, fair value		250
Held to maturity, amortized cost	[1]	250
Held to maturity debt securities, fair value		$ 250		[2]
[1]	Derived from audited financial statements.
[2]	Derived from audited financial statements.

Note 4 - Securities - Investmen

Note 4 - Securities - Investment Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Less Than Twelve Months, Gross Unrealized Losses	$ (470)	$ (963)
Less Than Twelve Months, Fair Value	78,929	125,788
Twelve Months or More, Gross Unrealized Losses	(3,109)	(6,623)
Twelve Months or More, Fair Value	302,207	320,802
Total, Gross Unrealized Losses	(3,579)	(7,586)
Total, Fair Value	381,136		$ 446,590
US Treasury and Government [Member]
Less Than Twelve Months, Gross Unrealized Losses	(5)	(8)
Less Than Twelve Months, Fair Value	1,003	1,001
Twelve Months or More, Gross Unrealized Losses	(325)	(611)
Twelve Months or More, Fair Value	47,913	50,878
Total, Gross Unrealized Losses	(330)	(619)
Total, Fair Value	48,916	51,880
Collateralized Mortgage Backed Securities [Member]
Less Than Twelve Months, Gross Unrealized Losses	(203)	(539)
Less Than Twelve Months, Fair Value	40,066	67,721
Twelve Months or More, Gross Unrealized Losses	(2,257)	(4,992)
Twelve Months or More, Fair Value	187,872	204,260
Total, Gross Unrealized Losses	(2,460)	(5,531)
Total, Fair Value	227,938	271,981
US States and Political Subdivisions Debt Securities [Member]
Less Than Twelve Months, Gross Unrealized Losses	(24)	(101)
Less Than Twelve Months, Fair Value	4,394	20,821
Twelve Months or More, Gross Unrealized Losses	(226)	(578)
Twelve Months or More, Fair Value	41,231	52,190
Total, Gross Unrealized Losses	(250)	(679)
Total, Fair Value	45,625	73,011
Corporate Debt Securities [Member]
Less Than Twelve Months, Gross Unrealized Losses	(238)	(315)
Less Than Twelve Months, Fair Value	33,466	36,245
Twelve Months or More, Gross Unrealized Losses	(301)	(442)
Twelve Months or More, Fair Value	25,191	13,474
Total, Gross Unrealized Losses	(539)	(757)
Total, Fair Value	$ 58,657	$ 49,718

Note 5 - Loans (Details Textual

Note 5 - Loans (Details Textual) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)
Financing Receivable, Troubled Debt Restructuring	$ 12.3	$ 18.8	$ 14.6
Financing Receivable, Modifications, Recorded Investment, Accruing Interest	2.7	15.8	3.1
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 2.6	$ 5.1	$ 4.3
Financing Receivable, Modifications, Number of Contracts	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts	2	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 0.3

Note 5 - Loans - Summary of Loa

Note 5 - Loans - Summary of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018		Mar. 31, 2018	Dec. 31, 2017
Financing receivable, gross	$ 6,659,908	$ 6,533,499
Less: Allowance for loan losses	(70,207)	(68,600)	[1]	$ (62,050)	$ (59,406)
Net Loans	$ 6,589,701	$ 6,464,899	[1]
Financing receivable, gross, percentage	100.00%	100.00%
Commercial Real Estate Portfolio Segment [Member]
Financing receivable, gross	$ 2,522,136	$ 2,513,225
Less: Allowance for loan losses	$ (39,459)	$ (39,016)		(35,787)	(32,880)
Financing receivable, gross, percentage	37.87%	38.47%
Real Estate Portfolio Segment[Member]
Financing receivable, gross	$ 3,524,491	$ 3,422,589
Financing receivable, gross, percentage	52.92%	52.38%
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Financing receivable, gross	$ 556,219	$ 533,192
Less: Allowance for loan losses	$ (3,595)	$ (3,522)		(4,138)	(4,989)
Financing receivable, gross, percentage	8.35%	8.16%
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	$ 1,500,595	$ 1,463,887
Financing receivable, gross, percentage	22.53%	22.41%
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Financing receivable, gross	$ 629,285	$ 621,634
Financing receivable, gross, percentage	9.45%	9.51%
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Financing receivable, gross	$ 1,394,611	$ 1,337,068
Financing receivable, gross, percentage	20.94%	20.46%
Consumer Portfolio Segment [Member]
Financing receivable, gross	$ 57,062	$ 64,493
Less: Allowance for loan losses	$ (442)	$ (554)		$ (519)	$ (515)
Financing receivable, gross, percentage	0.86%	0.99%
[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, 2019	Dec. 31, 2018
Financing receivable, gross	$ 6,659,908	$ 6,533,499
Pass [Member]
Financing receivable, gross	6,526,571	6,394,484
Special Mention [Member]
Financing receivable, gross	97,754	102,259
Substandard [Member]
Financing receivable, gross	35,583	36,756
Doubtful [Member]
Financing receivable, gross	6,659,908	6,533,499
Commercial Real Estate Portfolio Segment [Member]
Financing receivable, gross	2,522,136	2,513,225
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Financing receivable, gross	2,456,885	2,447,052
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Financing receivable, gross	47,075	47,754
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Financing receivable, gross	18,176	18,419
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Financing receivable, gross	2,522,136	2,513,225
Real Estate Portfolio Segment[Member]
Financing receivable, gross	3,524,491	3,422,589
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Financing receivable, gross	556,219	533,192
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	1,500,595	1,463,887
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Financing receivable, gross	629,285	621,634
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Financing receivable, gross	1,394,611	1,337,068
Real Estate Portfolio Segment[Member] | Pass [Member]
Financing receivable, gross	3,464,017	3,357,967
Real Estate Portfolio Segment[Member] | Pass [Member] | Construction Loans [Member]
Financing receivable, gross	548,656	525,021
Real Estate Portfolio Segment[Member] | Pass [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	1,470,108	1,431,982
Real Estate Portfolio Segment[Member] | Pass [Member] | One to Four Family [Member]
Financing receivable, gross	625,458	616,884
Real Estate Portfolio Segment[Member] | Pass [Member] | Other Mortgages [Member]
Financing receivable, gross	1,368,451	1,309,101
Real Estate Portfolio Segment[Member] | Special Mention [Member]
Financing receivable, gross	43,686	47,756
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Construction Loans [Member]
Financing receivable, gross	6,944	6,749
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	26,929	28,547
Real Estate Portfolio Segment[Member] | Special Mention [Member] | One to Four Family [Member]
Financing receivable, gross	1,976	2,703
Real Estate Portfolio Segment[Member] | Special Mention [Member] | Other Mortgages [Member]
Financing receivable, gross	14,781	16,506
Real Estate Portfolio Segment[Member] | Substandard [Member]
Financing receivable, gross	16,788	16,866
Real Estate Portfolio Segment[Member] | Substandard [Member] | Construction Loans [Member]
Financing receivable, gross	619	1,422
Real Estate Portfolio Segment[Member] | Substandard [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	3,558	3,358
Real Estate Portfolio Segment[Member] | Substandard [Member] | One to Four Family [Member]
Financing receivable, gross	1,851	2,047
Real Estate Portfolio Segment[Member] | Substandard [Member] | Other Mortgages [Member]
Financing receivable, gross	11,379	11,461
Real Estate Portfolio Segment[Member] | Doubtful [Member]
Financing receivable, gross	3,524,491	3,422,589
Real Estate Portfolio Segment[Member] | Doubtful [Member] | Construction Loans [Member]
Financing receivable, gross	556,219	533,192
Real Estate Portfolio Segment[Member] | Doubtful [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	1,500,595	1,463,887
Real Estate Portfolio Segment[Member] | Doubtful [Member] | One to Four Family [Member]
Financing receivable, gross	629,285	621,634
Real Estate Portfolio Segment[Member] | Doubtful [Member] | Other Mortgages [Member]
Financing receivable, gross	1,394,611	1,337,068
Consumer Portfolio Segment [Member]
Financing receivable, gross	57,062	64,493
Consumer Portfolio Segment [Member] | Pass [Member]
Financing receivable, gross	57,013	64,444
Consumer Portfolio Segment [Member] | Special Mention [Member]
Financing receivable, gross	49
Consumer Portfolio Segment [Member] | Substandard [Member]
Financing receivable, gross		49
Consumer Portfolio Segment [Member] | Doubtful [Member]
Financing receivable, gross	$ 57,062	$ 64,493

Note 5 - Loans - Loans by Perfo

Note 5 - Loans - Loans by Performance Status (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing receivable, gross	$ 6,659,908	$ 6,533,499
Performing Financial Instruments [Member]
Financing receivable, gross	6,632,733	6,505,729
Nonperforming Financial Instruments [Member]
Financing receivable, gross	27,175	27,770
Commercial Real Estate Portfolio Segment [Member]
Financing receivable, gross	2,522,136	2,513,225
Commercial Real Estate Portfolio Segment [Member] | Performing Financial Instruments [Member]
Financing receivable, gross	2,510,619	2,502,117
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Financing receivable, gross	11,517	11,108
Real Estate Portfolio Segment[Member]
Financing receivable, gross	3,524,491	3,422,589
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Financing receivable, gross	556,219	533,192
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	1,500,595	1,463,887
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Financing receivable, gross	629,285	621,634
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Financing receivable, gross	1,394,611	1,337,068
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member]
Financing receivable, gross	3,509,083	3,407,032
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | Construction Loans [Member]
Financing receivable, gross	555,981	532,195
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	1,497,037	1,460,529
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | One to Four Family [Member]
Financing receivable, gross	627,435	619,465
Real Estate Portfolio Segment[Member] | Performing Financial Instruments [Member] | Other Mortgages [Member]
Financing receivable, gross	1,384,611	1,327,038
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member]
Financing receivable, gross	15,408	15,557
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | Construction Loans [Member]
Financing receivable, gross	238	997
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | Owner Occupied Commercial [Member]
Financing receivable, gross	3,558	3,358
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | One to Four Family [Member]
Financing receivable, gross	1,850	2,169
Real Estate Portfolio Segment[Member] | Nonperforming Financial Instruments [Member] | Other Mortgages [Member]
Financing receivable, gross	10,000	10,030
Consumer Portfolio Segment [Member]
Financing receivable, gross	57,062	64,493
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Financing receivable, gross	57,050	64,385
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Financing receivable, gross	$ 12	$ 108

Note 5 - Loans - Loans Categori

Note 5 - Loans - Loans Categorized by Past Due Status (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018		Mar. 31, 2018
Accrual loans, past due	$ 15,465	$ 11,002
Non-accrual	22,154	21,926
Current	6,622,289	6,500,571
Total loans	6,659,908	6,533,499	[1]	$ 6,533,499
Financial Asset, 30 to 59 Days Past Due [Member]
Accrual loans, past due	7,668	3,400
Financial Asset, 60 to 89 Days Past Due [Member]
Accrual loans, past due	2,776	1,758
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accrual loans, past due	5,021	5,844
Commercial Real Estate Portfolio Segment [Member]
Accrual loans, past due	9,014	1,875
Non-accrual	11,486	10,503
Current	2,501,636	2,500,847
Total loans	2,522,136	2,513,225		2,513,225
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Accrual loans, past due	6,868	1,222
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Accrual loans, past due	2,115	48
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accrual loans, past due	31	605
Real Estate Portfolio Segment[Member]
Accrual loans, past due	6,386	7,486
Non-accrual	10,430	10,426
Current	3,507,675	3,404,677
Total loans	3,524,491	3,422,589
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Accrual loans, past due		1,352
Non-accrual	238	997
Current	555,981	530,843
Total loans	556,219	533,192		533,192
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Accrual loans, past due	122	412
Non-accrual	3,558	3,358
Current	1,496,915	1,460,117
Total loans	1,500,595	1,463,887
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Accrual loans, past due	1,249	892
Non-accrual	1,850	2,046
Current	626,186	618,696
Total loans	629,285	621,634
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Accrual loans, past due	5,015	6,182
Non-accrual	5,022	5,022
Current	1,384,574	1,325,864
Total loans	1,394,611	1,337,068
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Accrual loans, past due	759	2,120
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Accrual loans, past due
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied Commercial [Member]
Accrual loans, past due	122	412
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member] | One to Four Family [Member]
Accrual loans, past due	600	534
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Other Mortgages [Member]
Accrual loans, past due	37	1,174
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Accrual loans, past due	649	235
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Accrual loans, past due		1,352
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied Commercial [Member]
Accrual loans, past due
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member] | One to Four Family [Member]
Accrual loans, past due	649	235
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Other Mortgages [Member]
Accrual loans, past due
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accrual loans, past due	4,978	5,131
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Accrual loans, past due
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied Commercial [Member]
Accrual loans, past due
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | One to Four Family [Member]
Accrual loans, past due		123
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Mortgages [Member]
Accrual loans, past due	4,978	5,008
Consumer Portfolio Segment [Member]
Accrual loans, past due	65	289
Non-accrual
Current	56,997	64,204
Total loans	57,062	64,493		$ 64,493
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Accrual loans, past due	41	58
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Accrual loans, past due	12	123
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accrual loans, past due	$ 12	$ 108
[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, 2019		Mar. 31, 2018	Dec. 31, 2018
Balance, beginning of period	$ 68,600	[1]	$ 59,406
Charge-offs	(3,305)		(1,557)
Recoveries	27		62
Provision	4,885		4,139
Balance, end of period	70,207		62,050
Individually Evaluated for Impairment	7,289		8,128
Collectively Evaluated for Impairment	62,918		60,472
Ending Balance	6,659,908		6,533,499	$ 6,533,499	[1]
Individually Evaluated for Impairment	36,793		38,591
Collectively Evaluated for Impairment	6,623,115		6,494,908
Commercial Real Estate Portfolio Segment [Member]
Balance, beginning of period	39,016		32,880
Charge-offs	(3,037)		(1,088)
Recoveries	12		4
Provision	3,468		3,991
Balance, end of period	39,459		35,787
Individually Evaluated for Impairment	5,192		6,066
Collectively Evaluated for Impairment	34,267		32,950
Ending Balance	2,522,136		2,513,225	2,513,225
Individually Evaluated for Impairment	18,197		18,444
Collectively Evaluated for Impairment	2,503,939		2,494,781
Real Estate Portfolio Segment[Member]
Ending Balance	3,524,491			3,422,589
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Balance, beginning of period	3,522		4,989
Charge-offs
Recoveries	1		7
Provision	72		(858)
Balance, end of period	3,595		4,138
Individually Evaluated for Impairment	110		126
Collectively Evaluated for Impairment	3,485		3,396
Ending Balance	556,219		533,192	533,192
Individually Evaluated for Impairment	656		1,461
Collectively Evaluated for Impairment	555,563		531,731
Real Estate Portfolio Segment[Member] | Real Estate Loan [Member]
Balance, beginning of period	25,508		21,022
Charge-offs	(50)		(381)
Recoveries	7		42
Provision	1,246		923
Balance, end of period	26,711		21,606
Individually Evaluated for Impairment	1,987		1,887
Collectively Evaluated for Impairment	24,724		23,621
Ending Balance	3,524,491		3,422,589
Individually Evaluated for Impairment	17,891		18,637
Collectively Evaluated for Impairment	3,506,600		3,403,952
Consumer Portfolio Segment [Member]
Balance, beginning of period	554		515
Charge-offs	(218)		(88)
Recoveries	7		9
Provision	99		83
Balance, end of period	442		519
Individually Evaluated for Impairment			49
Collectively Evaluated for Impairment	442		505
Ending Balance	57,062		64,493	$ 64,493
Individually Evaluated for Impairment	49		49
Collectively Evaluated for Impairment	$ 57,013		$ 64,444
[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, 2019	Dec. 31, 2018
Recorded investment, with no allowance	$ 12,536	$ 14,423
Unpaid principal balance, with no allowance	13,135	14,610
Average recorded investment, with no allowance	13,117	15,110
Interest income recognized in period, with no allowance	132	658
Recorded investment, with an allowance	24,257	24,168
Unpaid principal balance, with an allowance	34,362	31,929
Related allowance	7,289	8,128
Average recorded investment, with an allowance	27,049	27,901
Interest income recognized in period, with an allowance	45	848
Recorded investment	36,793	38,591
Unpaid principal balance	47,497	46,539
Average recorded investment	40,166	43,011
Interest income recognized in period	177	1,506
Commercial Real Estate Portfolio Segment [Member]
Recorded investment, with no allowance	5,447	6,064
Unpaid principal balance, with no allowance	5,947	6,064
Average recorded investment, with no allowance	5,947	6,142
Interest income recognized in period, with no allowance	49	237
Recorded investment, with an allowance	12,750	12,380
Unpaid principal balance, with an allowance	22,855	20,141
Related allowance	5,192	6,066
Average recorded investment, with an allowance	15,416	15,918
Interest income recognized in period, with an allowance	30	462
Recorded investment	18,197	18,444
Unpaid principal balance	28,802	26,205
Average recorded investment	21,363	22,060
Interest income recognized in period	79	699
Real Estate Portfolio Segment[Member]
Recorded investment, with no allowance	6,671	7,895
Unpaid principal balance, with no allowance	6,767	8,079
Average recorded investment, with no allowance	6,716	8,444
Interest income recognized in period, with no allowance	76	393
Recorded investment, with an allowance	11,220	10,742
Unpaid principal balance, with an allowance	11,220	10,742
Related allowance	1,987	1,887
Average recorded investment, with an allowance	11,220	10,937
Interest income recognized in period, with an allowance	14	352
Recorded investment	17,891	18,637
Unpaid principal balance	17,987	18,821
Average recorded investment	17,936	19,381
Interest income recognized in period	90	745
Real Estate Portfolio Segment[Member] | Construction Loans [Member]
Recorded investment, with no allowance	418	464
Unpaid principal balance, with no allowance	421	467
Average recorded investment, with no allowance	454	524
Interest income recognized in period, with no allowance	7	28
Recorded investment, with an allowance	238	997
Unpaid principal balance, with an allowance	238	997
Related allowance	110	126
Average recorded investment, with an allowance	364	997
Interest income recognized in period, with an allowance		31
Recorded investment	656	1,461
Unpaid principal balance	659	1,464
Average recorded investment	818	1,521
Interest income recognized in period	7	59
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]
Recorded investment, with no allowance	1,096	1,763
Unpaid principal balance, with no allowance	1,192	1,947
Average recorded investment, with no allowance	1,102	2,223
Interest income recognized in period, with no allowance	16	120
Recorded investment, with an allowance	3,558	3,358
Unpaid principal balance, with an allowance	3,558	3,358
Related allowance	106	99
Average recorded investment, with an allowance	3,558	3,364
Interest income recognized in period, with an allowance		105
Interest income recognized in period, with an allowance	(1)
Recorded investment	4,654	5,121
Unpaid principal balance	4,750	5,305
Average recorded investment	4,660	5,587
Interest income recognized in period	15	225
Real Estate Portfolio Segment[Member] | One to Four Family [Member]
Recorded investment, with no allowance	597	1,071
Unpaid principal balance, with no allowance	597	1,071
Average recorded investment, with no allowance	622	1,088
Interest income recognized in period, with no allowance		21
Interest income recognized in period, with no allowance	(1)
Recorded investment, with an allowance	1,253	975
Unpaid principal balance, with an allowance	1,253	975
Related allowance	301	208
Average recorded investment, with an allowance	1,253	975
Interest income recognized in period, with an allowance		30
Recorded investment	1,850	2,046
Unpaid principal balance	1,850	2,046
Average recorded investment	1,875	2,063
Interest income recognized in period		51
Interest income recognized in period	(1)
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]
Recorded investment, with no allowance	4,978	5,061
Unpaid principal balance, with no allowance	4,978	5,061
Average recorded investment, with no allowance	4,992	5,133
Interest income recognized in period, with no allowance	61	252
Recorded investment, with an allowance	6,409	6,409
Unpaid principal balance, with an allowance	6,409	6,409
Related allowance	1,580	1,580
Average recorded investment, with an allowance	6,409	6,598
Interest income recognized in period, with an allowance	15	217
Recorded investment	11,387	11,470
Unpaid principal balance	11,387	11,470
Average recorded investment	11,401	11,731
Interest income recognized in period	76	469
Consumer Portfolio Segment [Member]
Recorded investment, with no allowance
Unpaid principal balance, with no allowance
Average recorded investment, with no allowance
Interest income recognized in period, with no allowance
Recorded investment, with an allowance	49	49
Unpaid principal balance, with an allowance	49	49
Related allowance		49
Average recorded investment, with an allowance	49	49
Interest income recognized in period, with an allowance	1	3
Recorded investment	49	49
Unpaid principal balance	49	49
Average recorded investment	49	49
Interest income recognized in period	$ 1	$ 3

Note 6 - Leases (Details Textua

Note 6 - Leases (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019
Lessee, Operating Lease, Term of Contract	10 years
Operating Lease, Right-of-Use Asset			$ 15,300,000
Operating Lease, Liability, Total	$ 14,679,000
Operating Lease, Weighted Average Remaining Lease Term	6 years 73 days
Operating Lease, Weighted Average Discount Rate, Percent	5.00%
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 400,000
Operating Lease, Payments	800,000
Operating Lease, Cost	900,000
Variable Lease, Cost	100,000
Short-term Lease, Cost	7,000
Operating Leases, Rent Expense, Total		$ 700,000
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			15,300,000
Operating Lease, Liability, Total			$ 15,300,000
Accounting Standards Update 2016-02 [Member] | Other Assets [Member]
Operating Lease, Right-of-Use Asset	14,700,000
Accounting Standards Update 2016-02 [Member] | Other Liabilities [Member]
Operating Lease, Liability, Total	$ 14,700,000

Note 6 - Leases - Maturities of

Note 6 - Leases - Maturities of Operating Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019USD ($)
2019 (remaining)	$ 2,397
2020	3,134
2021	2,487
2022	2,509
2023	2,088
thereafter	3,701
Total lease payments	16,316
Less: imputed interest	(1,637)
Present value of operating lease liabilities	$ 14,679

Note 7 - Employee and Directo_3

Note 7 - Employee and Director Benefits (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Payment Arrangement, Noncash Expense, Total	$ 282	$ 238
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 12.20	$ 10.41
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 1,600
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 292 days
Restricted Stock [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 1,200
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	3 years 73 days
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total	15,200	10,750
The 2009 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	5,550,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years

Note 7 - Employee and Directo_4

Note 7 - Employee and Director Benefits - Assumptions Used to Estimate Fair Value of Stock Option Awards (Details) - Share-based Payment Arrangement, Option [Member]	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Expected volatility	40.00%	23.43%
Expected dividends	1.76%	1.07%
Expected term (Year)	6 years 109 days	6 years 109 days
Risk-free rate	2.61%	2.67%

Note 7 - Employee and Directo_5

Note 7 - Employee and Director Benefits - Summary of Stock Option Activity (Details) - Share-based Payment Arrangement, Option [Member] - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Outstanding, shares (in shares)	1,238,748	1,666,834	1,666,834
Outstanding, weighted average exercise price (in dollars per share)	$ 13.02	$ 10.68	$ 10.68
Outstanding, weighted average remaining contractual term (Year)	6 years 109 days	5 years 182 days	5 years 73 days	5 years 182 days
Outstanding, aggregate intrinsic value	$ 21,318,000	$ 43,978	$ 23,355,000	$ 51,377,000
Granted (in shares)	6,000	10,250
Granted, weighted average exercise price (in dollars per share)	$ 34.09	$ 41.21
Granted, weighted average remaining contractual term (Year)	9 years 292 days	9 years 328 days
Granted, aggregate intrinsic value	$ (2,000)	$ (4,000)
Exercised (in shares)	(162,500)	(173,836)
Exercised, weighted average exercise price (in dollars per share)	$ 4.59	$ 4.90
Exercised, weighted average remaining contractual term (Year)	1 year 255 days	3 years 146 days
Exercised, aggregate intrinsic value	$ 4,384,000	$ 6,244,000
Forfeited (in shares)		(1,000)
Forfeited, weighted average exercise price (in dollars per share)		$ 25.41
Forfeited, weighted average remaining contractual term (Year)		8 years 182 days
Forfeited, aggregate intrinsic value		$ 15,000
Outstanding, shares (in shares)	1,082,248	1,502,248	1,238,748	1,666,834
Outstanding, weighted average exercise price (in dollars per share)	$ 14.41	$ 11.54	$ 13.02	$ 10.68
Exercisable, shares (in shares)	354,800	672,600
Exercisable, weighted average exercise price (in dollars per share)	$ 8.40	$ 5.48
Exercisable, weighted average remaining contractual term (Year)	4 years	3 years 328 days
Exercisable, aggregate intrinsic value	$ 9,356,000	$ 23,770,000

Note 9 - Recently Adopted Acc_2

Note 9 - Recently Adopted Accounting Pronouncements (Details Textual) - USD ($)	Mar. 31, 2019	Jan. 01, 2019
Operating Lease, Right-of-Use Asset		$ 15,300,000
Operating Lease, Liability, Total	$ 14,679,000
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset		15,300,000
Operating Lease, Liability, Total		$ 15,300,000

Note 11 - Fair Value Measurem_3

Note 11 - Fair Value Measurement (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Asset Impairment Charges, Total	$ 1,900,000	$ 2,300,000
Real Estate Owned, Amount of Loss at Acquisition	22,000	254,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure	340,000		$ 360,000
Mortgage Loans in Process of Foreclosure, Amount	0		173,000
Liabilities, Total	7,565,250,000		$ 7,292,179,000	[1]
Fair Value, Recurring [Member]
Liabilities, Total	0	0
Fair Value, Nonrecurring [Member]
Liabilities, Total	$ 0	$ 0
[1]	Derived from audited financial statements.

Note 11 - Fair Value Measurem_4

Note 11 - Fair Value Measurement - Financial Assets and Financial Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Available-for-sale securities	$ 631,696	$ 590,184	[1]
US Treasury and Government [Member]
Available-for-sale securities	74,081	76,993
Collateralized Mortgage Backed Securities [Member]
Available-for-sale securities	329,376	304,304
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities	96,468	105,994
Corporate Debt Securities [Member]
Available-for-sale securities	131,771	102,893
Fair Value, Recurring [Member]
Available-for-sale securities
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities	625,193	583,666
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities	6,503	6,518
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities	631,696	590,184
Fair Value, Recurring [Member] | US Treasury and Government [Member]
Available-for-sale securities
Fair Value, Recurring [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities	74,081	76,993
Fair Value, Recurring [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities
Fair Value, Recurring [Member] | US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities	74,081	76,993
Fair Value, Recurring [Member] | Collateralized Mortgage Backed Securities [Member]
Available-for-sale securities
Fair Value, Recurring [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities	329,376	304,304
Fair Value, Recurring [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities
Fair Value, Recurring [Member] | Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities	329,376	304,304
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities	96,468	105,994
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities	96,468	105,994
Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Available-for-sale securities
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities	125,268	96,375
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities	6,503	6,518
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities	$ 131,771	$ 102,893
[1]	Derived from audited financial statements.

Note 11 - Fair Value Measurem_5

Note 11 - Fair Value Measurement - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Inputs, Level 1 [Member]
Impaired loans	$ 29,504	$ 30,463
Other real estate owned and repossessed assets	5,480	5,169
Total assets at fair value	34,984	35,632
Fair Value, Inputs, Level 2 [Member]
Impaired loans	29,504	30,463
Other real estate owned and repossessed assets	5,480	5,169
Total assets at fair value	34,984	35,632
Fair Value, Inputs, Level 3 [Member]
Impaired loans
Other real estate owned and repossessed assets
Total assets at fair value

Note 11 - Fair Value Measurem_6

Note 11 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 71,058	$ 97,516	[1]
Federal funds sold	181,435	223,845	[1]
Mortgage loans held for sale	1,223	120	[1]
Held to maturity debt securities	250		[2]
Net Loans	6,589,701	6,464,899	[1]
Federal funds purchased	373,378	288,725	[1]
Fair Value, Inputs, Level 3 [Member]
Held to maturity debt securities	250
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	618,094	458,050
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Federal funds sold	181,435	223,845
Mortgage loans held for sale	1,223	120
Deposits	7,083,666	6,915,708
Federal funds purchased	373,378	288,725
Other borrowings	64,675	64,666
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Net Loans	6,589,701	6,464,899
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	618,094	458,050
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Federal funds sold	181,435	223,845
Mortgage loans held for sale	1,251	121
Deposits	7,082,114	6,910,176
Federal funds purchased	373,378	288,725
Other borrowings	64,618	64,613
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Net Loans	$ 6,555,511	$ 6,398,604
[1]	Derived from audited financial statements.
[2]	Derived from audited financial statements.