First Busey (BUSE) 10-Q 7 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 07, 2019
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2019
Entity File Number	0-15950
Entity Registrant Name	FIRST BUSEY CORPORATION
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	37-1078406
Entity Address, Address Line One	100 W. University Ave.
Entity Address, City or Town	Champaign
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	61820
City Area Code	217
Local Phone Number	365-4544
Title of 12(b) Security	Common Stock
Trading Symbol	BUSE
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		55,047,777
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000314489
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 139,523,000	$ 128,838,000
Interest-bearing deposits	385,934,000	111,135,000
Total cash and cash equivalents	525,457,000	239,973,000
Debt securities available for sale	1,701,005,000	697,685,000
Debt securities held to maturity (fair value 2019 $15,399; 2018 $603,360)	15,170,000	608,660,000
Equity securities	5,690,000	6,169,000
Loans held for sale, at fair value	70,345,000	25,895,000
Portfolio loans (net of allowance for loan losses 2019 $52,965; 2018 $50,648)	6,616,450,000	5,517,780,000
Premises and equipment, net	153,641,000	117,672,000
Right of use asset	9,979,000
Goodwill	322,699,000	267,685,000
Other intangible assets, net	58,624,000	32,873,000
Cash surrender value of bank owned life insurance	172,512,000	128,491,000
Other assets	102,188,000	59,474,000
Total assets	9,753,760,000	7,702,357,000
Deposits:
Noninterest-bearing	1,779,490,000	1,464,700,000
Interest-bearing	6,150,976,000	4,784,621,000
Total deposits	7,930,466,000	6,249,321,000
Securities sold under agreements to repurchase	202,500,000	185,796,000
Short-term borrowings	29,739,000
Long-term debt	85,106,000	50,000,000
Senior notes, net of unamortized issuance costs	39,640,000	39,539,000
Subordinated notes, net of unamortized issuance costs	59,222,000	59,147,000
Junior subordinated debt owed to unconsolidated trusts	71,269,000	71,155,000
Lease liability	10,101,000
Other liabilities	109,736,000	52,435,000
Total liabilities	8,537,779,000	6,707,393,000
Outstanding commitments and contingent liabilities (see Note 11)
Stockholders' Equity
Common stock, $.001 par value, authorized 66,666,667 shares; 55,910,733 shares issued 2019 and 49,185,581 shares issued 2018	56,000	49,000
Additional paid-in capital	1,247,560,000	1,080,084,000
Accumulated deficit	(31,868,000)	(72,167,000)
Accumulated other comprehensive income (loss)	17,391,000	(6,812,000)
Total stockholders' equity before treasury stock	1,233,139,000	1,001,154,000
Treasury stock, at cost (2019 713,456 shares; 2018 310,745 shares)	(17,158,000)	(6,190,000)
Total stockholders' equity	1,215,981,000	994,964,000
Total liabilities and stockholders' equity	$ 9,753,760,000	$ 7,702,357,000
Common shares outstanding at period end	55,197,277	48,874,836

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
CONSOLIDATED BALANCE SHEETS
Held to maturity, fair value	$ 15,399	$ 603,360
Portfolio Loans, allowance for loan losses (in dollars)	$ 52,965	$ 50,648
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	66,666,667	66,666,667
Common stock, shares issued	55,910,733	49,185,581
Treasury Stock, Shares	713,456	310,745

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest income:
Interest and fees on loans	$ 78,083,000	$ 63,589,000	$ 227,903,000	$ 186,839,000
Interest and dividends on investment securities:
Taxable interest income	10,247,000	7,357,000	31,583,000	19,670,000
Non-taxable interest income	1,180,000	1,166,000	3,456,000	3,630,000
Other interest income	2,181,000	649,000	4,496,000	1,580,000
Total interest income	91,691,000	72,761,000	267,438,000	211,719,000
Interest expense:
Deposits	14,753,000	8,946,000	41,407,000	21,837,000
Federal funds purchased and securities sold under agreements to repurchase	579,000	426,000	1,789,000	1,139,000
Short-term borrowings	200,000	324,000	885,000	1,257,000
Long-term debt	700,000	245,000	2,020,000	622,000
Senior notes	400,000	400,000	1,199,000	1,199,000
Subordinated notes	731,000	792,000	2,193,000	2,379,000
Junior subordinated debt owed to unconsolidated trusts	852,000	854,000	2,658,000	2,383,000
Total interest expense	18,215,000	11,987,000	52,151,000	30,816,000
Net interest income	73,476,000	60,774,000	215,287,000	180,903,000
Provision for loan losses	3,411,000	758,000	8,039,000	4,024,000
Net interest income after provision for loan losses	70,065,000	60,016,000	207,248,000	176,879,000
Non-interest income:
Mortgage revenue	3,331,000	1,272,000	8,127,000	4,488,000
Net gains on sales of securities	296,000		112,000	160,000
Unrealized gains (losses) recognized on equity securities	65,000		(735,000)
Other income	4,801,000	2,406,000	11,023,000	6,896,000
Total non-interest income	30,936,000	21,853,000	84,777,000	67,141,000
Non-interest expense:
Salaries, wages and employee benefits	38,747,000	26,024,000	105,356,000	80,315,000
Net occupancy expense of premises	4,652,000	3,761,000	13,365,000	11,271,000
Furniture and equipment expenses	2,489,000	1,715,000	6,936,000	5,418,000
Data processing	5,032,000	4,016,000	15,049,000	12,391,000
Amortization of intangible assets	2,360,000	1,445,000	6,866,000	4,450,000
Other expense	14,841,000	8,968,000	45,732,000	30,429,000
Total non-interest expense	68,121,000	45,929,000	193,304,000	144,274,000
Income before income taxes	32,880,000	35,940,000	98,721,000	99,746,000
Income taxes	8,052,000	9,081,000	24,339,000	26,108,000
Net income	$ 24,828,000	$ 26,859,000	$ 74,382,000	$ 73,638,000
Basic earnings per common share (in dollars per share)	$ 0.45	$ 0.55	$ 1.36	$ 1.51
Diluted earnings per common share (in dollars per share)	0.45	0.55	1.35	1.50
Dividends declared per share of common stock (in dollars per share)	$ 0.21	$ 0.20	$ 0.63	$ 0.60
Fees for customer services
Non-interest income:
Non-interest income	$ 9,842,000	$ 7,340,000	$ 27,635,000	$ 21,576,000
Trust fees
Non-interest income:
Non-interest income	7,689,000	6,324,000	24,122,000	20,573,000
Commissions and brokers fees, net
Non-interest income:
Non-interest income	1,132,000	881,000	3,216,000	2,860,000
Remittance processing
Non-interest income:
Non-interest income	$ 3,780,000	$ 3,630,000	$ 11,277,000	$ 10,588,000

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 24,828,000	$ 26,859,000	$ 74,382,000	$ 73,638,000
Unrealized gains (losses) on debt securities available for sale:
Net unrealized holding gains (losses) on debt securities available for sale, net of taxes	3,568,000	(2,159,000)	21,453,000	(9,609,000)
Net unrealized gains on debt securities transferred from held to maturity to available for sale, net of taxes			3,417,000
Amounts reclassified from accumulated other comprehensive income, Net of Tax	(212,000)		(75,000)
Net change in unrealized gains (losses) on debt securities available for sale	3,356,000	(2,159,000)	24,795,000	(9,609,000)
Unrealized gains (losses) on cash flow hedges:
Net unrealized holding gains (losses) on cash flow hedges, net of taxes	(598,000)		(598,000)
Amounts reclassified from accumulated other comprehensive income, Net of Tax	6,000		6,000
Net change in unrealized gains (losses) on derivative instruments	(592,000)		(592,000)
Net change in accumulated other comprehensive income (loss)	2,764,000	(2,159,000)	24,203,000	(9,609,000)
Total comprehensive income (loss)	$ 27,592,000	$ 24,700,000	$ 98,585,000	$ 64,029,000

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Unrealized holding gains (losses) on debt securities available for sale, Tax Effect	$ (1,423)	$ 860	$ (8,552)	$ 3,830
Tax expense (benefit) on unrealized gains on debt securities transferred from held to maturity to available for sale			(1,363)
Tax expense (benefit) on reclassification adjustment for realized (gains) losses on debt securities available for sale included in net income	85		29
Tax expense (benefit) on unrealized holding gains (losses) on cash flow hedges	239		239
Tax expense (benefit) on reclassification adjustment for realized (gains) losses on cash flow hedges included in net income	$ (3)		$ (3)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Additional Paid-in Capital	Accumulated (Deficit)	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
Accumulated other comprehensive income (loss) beginning balance period, net of tax at Dec. 31, 2017	$ 49,000	$ 1,084,889,000	$ (132,122,000)	$ (2,810,000)	$ (15,003,000)	$ 935,003,000
Beginning Balance (in shares) at Dec. 31, 2017	48,684,943
Increase (decrease) in shareholders' equity
Net income			73,638,000			73,638,000
Other comprehensive income (loss)				(9,609,000)		(9,609,000)
Issuance of treasury stock for employee stock purchase plan		(295,000)			724,000	429,000
Issuance of treasury stock for employee stock purchase plan (in shares)	14,828
Net issuance of treasury stock for restricted/deferred stock unit vesting and related tax		(6,059,000)			4,924,000	(1,135,000)
Net issuance of treasury stock for restricted/deferred stock unit vesting and related tax (in shares)	104,637
Tax Cuts and Jobs Act of 2017 reclassification			605,000	(605,000)
Net issuance of treasury stock for stock options exercised, net of shares redeemed and related tax		(2,505,000)			2,891,000	386,000
Net issuance of treasury stock for stock options exercised, net of shares redeemed and related tax (in shares)	55,901
Cash dividends common stock			(29,238,000)			(29,238,000)
Stock dividend equivalents restricted stock units		415,000	(415,000)
Stock-based compensation		2,666,000				2,666,000
Accumulated other comprehensive income (loss) ending balance period, net of tax at Sep. 30, 2018	$ 49,000	1,079,111,000	(87,532,000)	(13,024,000)	(6,464,000)	972,140,000
Ending Balance (in shares) at Sep. 30, 2018	48,860,309
Accumulated other comprehensive income (loss) beginning balance period, net of tax at Jun. 30, 2018	$ 49,000	1,082,323,000	(104,504,000)	(10,865,000)	(9,821,000)	957,182,000
Beginning Balance (in shares) at Jun. 30, 2018	48,776,404
Increase (decrease) in shareholders' equity
Net income			26,859,000			26,859,000
Other comprehensive income (loss)				(2,159,000)		(2,159,000)
Issuance of treasury stock for employee stock purchase plan		33,000			58,000	91,000
Issuance of treasury stock for employee stock purchase plan (in shares)	3,080
Net issuance of treasury stock for restricted/deferred stock unit vesting and related tax		(4,184,000)			3,121,000	(1,063,000)
Net issuance of treasury stock for restricted/deferred stock unit vesting and related tax (in shares)	72,805
Net issuance of treasury stock for stock options exercised, net of shares redeemed and related tax		(138,000)			178,000	40,000
Net issuance of treasury stock for stock options exercised, net of shares redeemed and related tax (in shares)	8,020
Cash dividends common stock			(9,756,000)			(9,756,000)
Stock dividend equivalents restricted stock units		133,000	(131,000)			2,000
Stock-based compensation		944,000				944,000
Accumulated other comprehensive income (loss) ending balance period, net of tax at Sep. 30, 2018	$ 49,000	1,079,111,000	(87,532,000)	(13,024,000)	(6,464,000)	972,140,000
Ending Balance (in shares) at Sep. 30, 2018	48,860,309
Accumulated other comprehensive income (loss) beginning balance period, net of tax at Dec. 31, 2018	$ 49,000	1,080,084,000	(72,167,000)	(6,812,000)	(6,190,000)	994,964,000
Beginning Balance (in shares) at Dec. 31, 2018	48,874,836
Increase (decrease) in shareholders' equity
Net income			74,382,000			74,382,000
Other comprehensive income (loss)				24,203,000		24,203,000
Repurchase of stock					(13,323,000)	(13,323,000)
Repurchase of stock (in shares)	(527,396)
Stock issued in acquisition of Banc Ed, net of stock issuance costs	$ 7,000	166,274,000				166,281,000
Stock issued in acquisition of Banc Ed, net of stock issuance costs (in shares)	6,725,152
Issuance of treasury stock for employee stock purchase plan		100,000			389,000	489,000
Issuance of treasury stock for employee stock purchase plan (in shares)	20,528
Net issuance of treasury stock for restricted/deferred stock unit vesting and related tax		(2,541,000)			345,000	(2,196,000)
Net issuance of treasury stock for restricted/deferred stock unit vesting and related tax (in shares)	91,032
Net issuance of treasury stock for stock options exercised, net of shares redeemed and related tax		(97,000)			1,621,000	1,524,000
Net issuance of treasury stock for stock options exercised, net of shares redeemed and related tax (in shares)	13,125
Cash dividends common stock			(33,579,000)			(33,579,000)
Stock dividend equivalents restricted stock units		504,000	(504,000)
Stock-based compensation		3,236,000				3,236,000
Accumulated other comprehensive income (loss) ending balance period, net of tax at Sep. 30, 2019	$ 56,000	1,247,560,000	(31,868,000)	17,391,000	(17,158,000)	1,215,981,000
Ending Balance (in shares) at Sep. 30, 2019	55,197,277
Accumulated other comprehensive income (loss) beginning balance period, net of tax at Jun. 30, 2019	$ 56,000	1,246,160,000	(44,878,000)	14,627,000	(12,357,000)	1,203,608,000
Beginning Balance (in shares) at Jun. 30, 2019	55,386,636
Increase (decrease) in shareholders' equity
Net income			24,828,000			24,828,000
Other comprehensive income (loss)				2,764,000		2,764,000
Repurchase of stock					(4,890,000)	(4,890,000)
Repurchase of stock (in shares)	(194,062)
Issuance of treasury stock for employee stock purchase plan		21,000			83,000	104,000
Issuance of treasury stock for employee stock purchase plan (in shares)	4,378
Net issuance of treasury stock for restricted/deferred stock unit vesting and related tax		(6,000)				(6,000)
Net issuance of treasury stock for stock options exercised, net of shares redeemed and related tax		(6,000)			6,000
Net issuance of treasury stock for stock options exercised, net of shares redeemed and related tax (in shares)	325
Cash dividends common stock			(11,632,000)			(11,632,000)
Stock dividend equivalents restricted stock units		186,000	(186,000)
Stock-based compensation		1,205,000				1,205,000
Accumulated other comprehensive income (loss) ending balance period, net of tax at Sep. 30, 2019	$ 56,000	$ 1,247,560,000	$ (31,868,000)	$ 17,391,000	$ (17,158,000)	$ 1,215,981,000
Ending Balance (in shares) at Sep. 30, 2019	55,197,277

CONSOLIDATED STATEMENTS OF ST_2

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
Cash dividends, common stock (in dollars per share)	$ 0.21	$ 0.20	$ 0.63	$ 0.60
Stock dividends, restricted stock units (in dollars per share)	$ 0.21	$ 0.20	$ 0.63	$ 0.60

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities
Net income	$ 74,382	$ 73,638
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	8,039	4,024
Amortization of intangible assets	6,866	4,450
Amortization of Mortgage Servicing Rights ("MSR")	2,061	1,153
Depreciation and amortization of premises and equipment	8,701	7,158
Net amortization (accretion) of premium (discount) on portfolio loans	(8,300)	(8,615)
Net amortization (accretion) of premium (discount) on investment securities	4,538	6,545
Net amortization (accretion) of premium (discount) on time deposits	(1,243)	(191)
Net amortization (accretion) of premium (discount) on Federal Home Loan Bank ("FHLB") advances and other borrowings	216	109
Impairment of other real estate owned ("OREO")	26
Impairment of fixed assets held for sale		817
Impairment of MSR	1,822
Change in fair value of loans held for sale, net	(1,022)
Change in fair value of equity securities, net	735	(2,699)
(Gain) loss on sales of securities, net	(112)	(160)
(Gain) loss on sale of loans, net	(11,022)	(7,805)
(Gain) loss on sale of OREO	(81)
(Gain) loss on sale of premises and equipment	114	186
(Gain) loss life insurance proceeds	(1,509)
Provision for deferred income taxes	3,816	4,696
Stock-based and non-cash compensation	3,236	2,666
Decrease in deferred compensation	(3,339)
Increase in cash surrender value of bank owned life insurance	(3,050)	(926)
Mortgage loans originated for sale	(468,227)	(336,169)
Proceeds from sales of mortgage loans	437,525	406,205
Net change in operating assets and liabilities:
(Increase) decrease in other assets	1,746	(2,580)
Decrease to other liabilities	(3,603)	(5,366)
Net cash provided by operating activities	52,315	147,136
Cash Flows from Investing Activities
Purchases of debt securities held to maturity		(217,767)
Purchases of debt securities available for sale	(296,806)	(122,954)
Purchase of FHLB stock	(3,700)	(25,990)
Proceeds from sales of securities classified held to maturity		31,815
Proceeds from sales of equity securities	958	920
Proceeds from sales of debt securities available for sale	227,371
Proceeds from paydowns and maturities of debt securities held to maturity	14,422
Proceeds from paydowns and maturities of debt securities available for sale	366,624	115,522
Proceeds from the redemption of FHLB stock	3,720	23,379
Net cash (received) paid in acquisitions	(61,481)
Net change in loans	(227,069)	(104,195)
Cash paid for premiums on bank-owned life insurance	(3)
Purchases of premises and equipment	(10,746)	(10,436)
Proceeds from life insurance	3,915
Proceeds from disposition of premises and equipment	393	26
Capitalized expenditures on OREO	(2)
Proceeds from sale of OREO	2,071	4,275
Net cash provided by (used in) investing activities	19,667	(305,405)
Cash Flows from Financing Activities
Net change in deposits	243,184	69,796
Net change in federal funds purchased and securities sold under agreements to repurchase	(33,895)	(48,660)
Proceeds from other borrowings	60,000
Repayment of FHLB advances, net	(3,479)	(20,000)
Repayment of other borrowings	(4,500)	(5,500)
Cash dividends paid	(33,579)	(29,238)
Purchase of treasury stock	(13,323)
Cash paid for withholding taxes on share based payments	(841)	(1,136)
Proceeds from stock options exercised	169	387
Common stock issuance costs	(234)
Net cash provided by (used in) financing activities	213,502	(34,351)
Net increase (decrease) in cash and cash equivalents	285,484	(192,620)
Cash and cash equivalents, beginning of period	239,973	353,272
Cash and cash equivalents, ending of period	525,457	160,652
Cash Payments for:
Interest	51,230	26,665
Income taxes	15,205	20,127
Non-cash Investing and Financing Activities:
OREO acquired in settlement of loans	2,349	$ 3,706
Transfer of debt securities held to maturity to available for sale	$ 573,639

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
Significant Accounting Policies
Significant Accounting Policies	Note 1: Significant Accounting Policies ​ Basis of Financial Statement Presentation ​ When preparing these unaudited consolidated financial statements of First Busey Corporation and its subsidiaries (“First Busey,” “Company,” “we,” or “our”), a Nevada corporation, we have assumed that you have read the audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2018 (“2018 Form 10-K”). These interim unaudited consolidated financial statements serve to update our 2018 Form 10-K and may not include all information and notes necessary to constitute a complete set of financial statements. ​ We prepared these unaudited consolidated financial statements in accordance with accounting principles generally accepted in the United States of America (“GAAP”). We have eliminated intercompany accounts and transactions. We have also reclassified certain prior year amounts to conform to the current period presentation. These reclassifications did not have a material impact on our consolidated financial condition or results of operations. ​ In our opinion, the unaudited consolidated financial statements reflect all normal, recurring adjustments needed to present fairly our results for the interim periods. The results of operations for interim periods are not necessarily indicative of the results that may be expected for the full year or any other interim period. ​ The Company has evaluated subsequent events for potential recognition and/or disclosure through the date the unaudited consolidated financial statements included in this Quarterly Report on Form 10-Q were issued. On October 4, 2019 TheBANK of Edwardsville (“TheBANK”) was merged with and into Busey Bank. On October 15, 2019, the Company began operations of First Busey Risk Management, Inc. (“First Busey Risk Management”), a new formed wholly-owned subsidiary of First Busey. First Busey Risk Management, incorporated in Nevada, is a captive insurance company which insures against certain risks unique to the operations of the Company and its subsidiaries and for which insurance may not be currently available or economically feasible in today’s insurance marketplace. First Busey Risk Management pools resources with several other similar insurance company subsidiaries of financial institutions to spread a limited amount of risk among themselves. First Busey Risk Management is subject to regulations of the State of Nevada and will be subject to periodic examinations by the Nevada Division of Insurance. Other than these events, there were no significant subsequent events for the quarter ended September 30, 2019 through the issuance date of these unaudited consolidated financial statements that warranted adjustment to or disclosure in the unaudited consolidated financial statements. ​ Use of Estimates ​ In preparing the accompanying unaudited consolidated financial statements in conformity with GAAP, the Company’s management is required to make estimates and assumptions that affect the amounts reported in the financial statements and the disclosures provided. Actual results could differ from those estimates. Material estimates which are particularly susceptible to significant change in the near term relate to the fair value of investment securities, fair value of assets acquired and liabilities assumed in business combinations, goodwill, income taxes and the determination of the allowance for loan losses. ​ Leases Effective January 1, 2019, a determination is made at inception if an arrangement contains a lease. For arrangements that contain a lease, the Company recognizes the lease on the balance sheet as a right of use asset and corresponding lease liability. Lease-related assets, or right of use assets, are recognized on the lease commencement date at amounts equal to the respective lease liabilities, adjusted for prepaid lease payments, initial direct costs, and lease incentives received. Lease-related liabilities are recognized at the present value of the remaining contractual fixed lease payments, discounted using our incremental borrowing rate. Operating lease expense is recognized on a straight-line basis over the lease term, while variable lease payments are expensed as incurred. Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. If not readily determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. For operating leases existing prior to January 1, 2019, the Company used a borrowing rate that corresponded to the remaining lease term. ​ The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the right-of-use asset and lease liability. ​ Impact of recently adopted accounting standards On January 1, 2019, the Company adopted Accounting Standards Update (“ASU”) 2016-02 “Leases (Topic 842) and all subsequent ASUs that modified Topic 842. The Company made the following elections for all leases in connection with the adoption of this guidance: ● The Company elected the package of practical expedients to not reassess prior conclusions related to contracts containing leases, lease classification and initial direct costs; ● The Company did not elect the hindsight practical expedient ; ● The Company elected the optional transition method that allows companies to use the effective date as the date of initial application on transition. As a result, the Company did not adjust comparative period financial information or make the newly required lease disclosures for periods before the effective date; ● The Company elected not to apply the above guidance to short-term leases; ● The Company elected to separate the lease components from the nonlease components and exclude the nonlease components from the right-of-use asset and lease liability; and ● The Company did not elect the land easement practical expedient. ​ At the date of adoption, the Company recorded approximately $8.1 million on its Consolidated Balance Sheets to reflect the right of use asset and associated lease liability . The Company utilized its incremental borrowing rate, on a collateralized basis, for the remaining contractual lease term. ​ ASU 2017-08, "Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20), Premium Amortization on Purchased Callable Debt Securities." ASU 2017-08 shortens the amortization period for certain callable debt securities held at a premium, requiring the premium to be amortized to the earliest call date. ASU 2017-08 does not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. This guidance was effective for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. ​ ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities." ASU 2017-12 amends Topic 815 to reduce the cost and complexity of applying hedge accounting and expands the types of relationships that qualify for hedge accounting. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness, requires all items that affect earnings to be presented in the same income statement line as the hedged item, provides for applying hedge accounting to additional hedging strategies, provides for new approaches to measuring the hedged item in fair value hedges of interest rate risk, and eases the requirements for effective testing and hedge documentation. This guidance was effective for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years. During the first quarter of 2019, t he Company adopted this guidance, reassessed classification of certain investments, and transferred $573.6 million of securities from held to maturity to available for sale. ​ ASU 2018-07, "Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting." ASU 2018-07 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. This guidance was effective for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. Recently issued accounting standards ​ ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." ASU 2016-13 implements a change from the current impaired loss model to an expected credit loss model over the life of an instrument, including loans and securities held to maturity. The expected credit loss model is expected to result in earlier recognition of losses. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 including interim periods with those years. The Company is executing a project plan to implement this guidance. The project plan includes an assessment of data, development of methodologies, model validation, parallel runs, refining qualitative factors and forecast periods and evaluating related disclosures. The Company is currently assessing the impact of adopting ASU 2016-13, which will be significantly influenced by the composition, characteristics and quality of the loan portfolio as well as the prevailing economic conditions and forecasts as of the adoption date.

Acquisition

Acquisition	9 Months Ended
	Sep. 30, 2019
Acquisition
Acquisition	Note 2: Acquisition ​ The Banc Ed Corp. ​ On January 31, 2019, the Company completed its acquisition of The Banc Ed Corp. (“Banc Ed”). TheBANK, Banc Ed’s wholly-owned bank subsidiary, was operated as a separate subsidiary from the completion of the acquisition until October 4, 2019 when it was merged with and into Busey Bank. At that time, TheBANK’s banking centers became banking centers of Busey Bank. ​ Under the terms of the merger agreement with Banc Ed, at the effective time of the acquisition, each share of Banc Ed common stock issued and outstanding was converted into the right to receive 8.2067 shares of the Company’s common stock, cash in lieu of fractional shares and $111.53 in cash consideration per share. The market value of the 6.7 million shares of First Busey common stock issued at the effective time of the acquisition was approximately $166.5 million based on First Busey’s closing stock price of $24.76 on January 31, 2019. ​ This transaction was accounted for using the acquisition method of accounting and, accordingly, assets acquired, liabilities assumed, and consideration exchanged was recorded at estimated fair values on the date of acquisition. Fair values are considered provisional until final fair values are determined or the measurement period has passed, but no later than one year from the acquisition date. Reviews of third party valuations are still being performed by management. Therefore amounts are subject to change and could change materially from the provisional amounts disclosed below. During the quarter ended September 30, 2019, the Company adjusted the provisional fair value estimates of Banc Ed’s assets acquired and liabilities assumed. Adjustments included a $0.1 million decrease to premises and equipment and a $0.3 decrease to other liabilities with a corresponding decrease to goodwill of $0.2 million. ​ First Busey incurred $6.5 million and $11.5 million in pre-tax expenses related to the acquisition of Banc Ed for the three and nine months ended September 30, 2019, respectively, primarily for salaries, wages and employee benefits, professional and legal fees and deconversion expenses, all of which are reported as a component of non-interest expense in the accompanying unaudited Consolidated Statements of Income. ​ The following table presents the estimated fair value of Banc Ed’s assets acquired and liabilities assumed as of January 31, 2019 (dollars in thousands) : ​ ​ ​ ​ ​ ​ Estimated ​ ​ Fair Value Assets acquired: ​ ​ Cash and cash equivalents ​ $ 42,013 Securities ​ 692,716 Loans held for sale ​ 2,157 Portfolio loans ​ 873,336 Premises and equipment ​ 31,804 Other intangible assets ​ ​ 32,617 Mortgage servicing rights ​ 6,946 Other assets ​ 57,296 Total assets acquired ​ 1,738,885 ​ ​ ​ ​ Liabilities assumed: ​ ​ ​ Deposits ​ 1,439,203 Other borrowings ​ 63,439 Other liabilities ​ 24,760 Total liabilities assumed ​ 1,527,402 ​ ​ ​ ​ Net assets acquired ​ $ 211,483 ​ ​ ​ ​ Consideration paid: ​ ​ ​ Cash ​ $ 91,400 Common stock ​ 166,515 Total consideration paid ​ $ 257,915 ​ ​ ​ ​ Goodwill ​ $ 46,432 ​ The loans acquired in this transaction were recorded at fair value with no carryover of any existing allowance for loan losses. Loans that were not deemed to be credit-impaired at the acquisition date were accounted for under Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 310-20, Receivables-Nonrefundable Fees and Other Costs , and were subsequently considered as part of the Company’s determination of the adequacy of the allowance for loan losses. Purchased credit impaired (“PCI”) loans were accounted for under ASC 310-30, Receivables — Loans and Debt Securities Acquired with Deteriorated Credit Quality . As of the acquisition date, the aggregate principal balance outstanding and aggregate fair value of the acquired performing loans were $889.3 million and $871.0 million, respectively. The difference between the carrying value and aggregate fair value of $17.0 million will be accreted over the estimated remaining life of the respective loans in a manner that approximates the level yield method. As of the acquisition date, the aggregate principal balance outstanding of PCI loans totaled $3.9 million and the aggregate fair value of PCI loans totaled $2.3 million. The accretable discount of $0.2 million on PCI loans represents the amount by which the undiscounted expected cash flows on such loans exceed their carrying value. The amount by which the contractual payments exceeds the undiscounted expected cash flows represents the non-accretable difference. The difference between contractually required payments at the acquisition date and the cash flow expected to be collected is referred to as the non-accretable difference. Further, the excess of cash flows expected at acquisition over the fair value is referred to as the accretable yield. At September 30, 2019, the carrying value of PCI loans acquired from Banc Ed was $1.5 million. ​ Since the acquisition date, Banc Ed earned total revenues of $53.7 million and net income of $9.5 million, which are included in the Company’s unaudited Consolidated Statements of Income for the nine months ended September 30, 2019. The following table provides the unaudited pro forma information for the results of operations for the three and nine months ended September 30, 2019 and 2018, as if the acquisition had occurred January 1, 2018. The pro forma results combine the historical results of Banc Ed into the Company’s unaudited Consolidated Statements of Income, including the impact of purchase accounting adjustments including loan discount accretion, intangible assets amortization, deposit accretion and premises accretion, net of taxes. The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the results that would have been obtained had the acquisition actually occurred on January 1, 2018. No assumptions have been applied to the pro forma results of operations regarding possible revenue enhancements, expense efficiencies or asset dispositions ( dollars in thousands, except per share amounts) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pro Forma ​ ​ Three Months Ended September 30, ​ Nine Months Ended September 30, ​ ​ 2019 ​ ​ 2018 ​ ​ 2019 ​ 2018 Total revenues (net interest income plus non- interest income) $ 104,543 ​ $ 101,001 ​ $ 305,709 ​ $ 306,472 Net income ​ 30,811 ​ ​ 31,641 ​ 84,742 ​ ​ 87,972 Diluted earnings per common share ​ 0.55 ​ ​ 0.57 ​ 1.51 ​ ​ 1.60 ​ ​ ​ ​ Investors’ Security Trust Company ​ On August 31, 2019, the Company completed the previously announced acquisition by Busey Bank of Investors’ Security Trust Company (“IST”), a Fort Myers, Florida wealth management firm. While the partnership is expected to add to the Company’s wealth management offerings, it is not expected to have any immediate, material impact on the Company’s earnings or overall business. ​ This transaction was accounted for using the acquisition method of accounting and, accordingly, assets acquired, liabilities assumed, and consideration exchanged was recorded at estimated fair values on the date of acquisition. Fair values are considered provisional until final fair values are determined or the measurement period has passed, but no later than one year from the acquisition date. Reviews of third party valuations are still being performed by management. ​ First Busey incurred $0.5 million and $0.7 million in pre-tax expenses related to the acquisition of IST for the three and nine months ended September 30, 2019, respectively, primarily for professional and legal fees, which are reported as a component of non-interest expense in the accompanying unaudited Consolidated Statements of Income. ​

Securities

Securities	9 Months Ended
	Sep. 30, 2019
Securities
Securities	Note 3: Securities ​ The table below provides the amortized cost, unrealized gains and losses and fair values of debt securities summarized by major category (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair September 30, 2019: Cost Gains Losses Value Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 51,395 ​ $ 262 ​ $ (6) ​ $ 51,651 Obligations of U.S. government corporations and agencies ​ 202,393 ​ 3,273 ​ (53) ​ 205,613 Obligations of states and political subdivisions ​ 263,345 ​ 5,733 ​ (16) ​ 269,062 Commercial mortgage-backed securities ​ ​ 121,338 ​ ​ 2,248 ​ ​ (18) ​ ​ 123,568 Residential mortgage-backed securities ​ 914,320 ​ 12,674 ​ (607) ​ 926,387 Corporate debt securities ​ 123,061 ​ 1,668 ​ (5) ​ 124,724 Total ​ $ 1,675,852 ​ $ 25,858 ​ $ (705) ​ $ 1,701,005 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities held to maturity ​ ​ ​ ​ ​ ​ ​ ​ Obligations of states and political subdivisions ​ $ 15,170 ​ $ 229 ​ $ — ​ $ 15,399 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair December 31, 2018: Cost Gains Losses Value Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 25,824 ​ $ 1 ​ $ (414) ​ $ 25,411 Obligations of U.S. government corporations and agencies ​ 53,096 ​ 7 ​ (761) ​ 52,342 Obligations of states and political subdivisions ​ 171,131 ​ 484 ​ (1,571) ​ 170,044 Commercial mortgage-backed securities ​ ​ 2,003 ​ ​ — ​ ​ (61) ​ ​ 1,942 Residential mortgage-backed securities ​ 322,646 ​ 245 ​ (7,143) ​ 315,748 Corporate debt securities ​ 132,513 ​ 61 ​ (376) ​ 132,198 Total ​ $ 707,213 ​ $ 798 ​ $ (10,326) ​ $ 697,685 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities held to maturity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Obligations of states and political subdivisions ​ $ 33,947 ​ $ 68 ​ $ (87) ​ $ 33,928 Commercial mortgage-backed securities ​ ​ 59,054 ​ ​ 11 ​ ​ (1,003) ​ ​ 58,062 Residential mortgage-backed securities ​ ​ 515,659 ​ ​ 1,748 ​ ​ (6,037) ​ ​ 511,370 Total ​ $ 608,660 ​ $ 1,827 ​ $ (7,127) ​ $ 603,360 ​ In adopting ASU 2017-12, the Company reassessed the classification of certain investments during the first quarter of 2019 and transferred $573.6 million of securities from held to maturity to available for sale. The transfer occurred at fair value and had a related unrealized loss of $4.8 million recorded in other comprehensive income. ​ The amortized cost and fair value of debt securities, by contractual maturity or pre-refunded date, are shown below. Mortgages underlying mortgage-backed securities may be called or prepaid; therefore, actual maturities could differ from the contractual maturities. All mortgage-backed securities were issued by U.S. government agencies and corporations (dollars in thousands) . ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities available for sale ​ Debt securities held to maturity ​ Amortized Fair Amortized Fair September 30, 2019: Cost Value Cost Value Due in one year or less ​ $ 128,897 ​ $ 129,230 ​ $ 2,215 ​ $ 2,218 Due after one year through five years ​ 407,251 ​ 413,491 ​ 11,834 ​ 12,006 Due after five years through ten years ​ 248,270 ​ 253,453 ​ 1,121 ​ 1,175 Due after ten years ​ 891,434 ​ 904,831 ​ — ​ — Total ​ $ 1,675,852 ​ $ 1,701,005 ​ $ 15,170 ​ $ 15,399 ​ Realized gains and losses related to sales and calls of debt securities available for sale are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, ​ Nine Months Ended September 30, ​ 2019 2018 2019 2018 Gross security gains ​ $ 298 ​ $ — ​ $ 689 ​ $ — Gross security (losses) ​ ​ (1) ​ — ​ (585) ​ — Net (losses) gains on sales of securities (1) ​ $ 297 ​ $ — ​ $ 104 ​ $ — (1) Net (losses) gains on sales of securities reported on the unaudited Consolidated Statements of Income includes sale of equity securities, excluded in this table. ​ Debt securities with carrying amounts of $768.7 million and $498.3 million on September 30, 2019 and December 31, 2018, respectively, were pledged as collateral for public deposits, securities sold under agreements to repurchase and for other purposes as required or permitted by law. ​ The following information pertains to debt securities with gross unrealized losses, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For less than ​ For greater ​ ​ ​ ​ ​ ​ ​ 12 months, gross ​ than 12 months, gross ​ Total, gross ​ Fair Unrealized Fair Unrealized Fair Unrealized September 30, 2019: Value Losses Value Losses Value Losses Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities $ — ​ $ — ​ $ 9,982 ​ $ (6) ​ $ 9,982 ​ $ (6) Obligations of U.S. government corporations and agencies ​ 6,938 ​ ​ (45) ​ ​ 6,481 ​ ​ (8) ​ ​ 13,419 ​ ​ (53) Obligations of states and political subdivisions ​ 4,949 ​ ​ (11) ​ ​ 9,129 ​ ​ (5) ​ ​ 14,078 ​ ​ (16) Commercial mortgage-backed securities ​ 3,913 ​ ​ (11) ​ ​ 9,702 ​ ​ (7) ​ ​ 13,615 ​ ​ (18) Residential mortgage-backed securities 43,372 ​ (47) ​ 57,319 ​ (560) ​ 100,691 ​ (607) Corporate debt securities 485 ​ (2) ​ 5,595 ​ (3) ​ 6,080 ​ (5) Total temporarily impaired securities $ 59,657 ​ $ (116) ​ $ 98,208 ​ $ (589) ​ $ 157,865 ​ $ (705) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For less than ​ For greater ​ ​ ​ ​ ​ ​ ​ 12 months, gross ​ than 12 months, gross ​ Total, gross ​ Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2018: Value Losses Value Losses Value Losses Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities $ 995 ​ $ (4) ​ $ 24,343 ​ $ (410) ​ $ 25,338 ​ $ (414) Obligations of U.S. government corporations and agencies ​ 749 ​ ​ (3) ​ ​ 50,744 ​ ​ (758) ​ ​ 51,493 ​ ​ (761) Obligations of states and political subdivisions ​ 49,893 ​ ​ (460) ​ ​ 77,651 ​ ​ (1,111) ​ ​ 127,544 ​ ​ (1,571) Commercial mortgage-backed securities ​ — ​ ​ — ​ ​ 1,942 ​ ​ (61) ​ ​ 1,942 ​ ​ (61) Residential mortgage-backed securities 48,387 ​ (496) ​ 247,573 ​ (6,647) ​ 295,960 ​ (7,143) Corporate debt securities 90,713 ​ (268) ​ 15,083 ​ (108) ​ 105,796 ​ (376) Total temporarily impaired securities $ 190,737 ​ $ (1,231) ​ $ 417,336 ​ $ (9,095) ​ $ 608,073 ​ $ (10,326) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities held to maturity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Obligations of states and political subdivisions $ 9,531 ​ $ (33) ​ $ 9,538 ​ $ (54) ​ $ 19,069 ​ $ (87) Commercial mortgage-backed securities ​ 12,067 ​ ​ (212) ​ ​ 45,041 ​ ​ (791) ​ ​ 57,108 ​ ​ (1,003) Residential mortgage-backed securities ​ 77,071 ​ ​ (974) ​ ​ 245,128 ​ ​ (5,063) ​ ​ 322,199 ​ ​ (6,037) Total temporarily impaired securities $ 98,669 ​ $ (1,219) ​ $ 299,707 ​ $ (5,908) ​ $ 398,376 ​ $ (7,127) ​ Debt securities are periodically evaluated for other-than-temporary impairment (“OTTI”). As of September 30, 2019, the Company’s debt security portfolio consisted of 1,208 securities. The total number of debt securities in the investment portfolio in an unrealized loss position as of September 30, 2019 was 74 and represented an unrealized loss of 0.44% of the aggregate fair value. The unrealized losses relate to changes in market interest rates and market conditions that do not represent credit-related impairments. Furthermore, the Company does not intend to sell such securities and it is more likely than not that the Company will recover the amortized cost prior to being required to sell the debt securities. Full collection of the amounts due according to the contractual terms of the debt securities is expected; therefore, the Company does not consider these investments to be OTTI at September 30, 2019. As of September 30, 2019, the Company did not hold general obligation bonds of any single issuer, the aggregate of which exceeded 10% of the Company’s stockholders’ equity.

Portfolio loans

Portfolio loans	9 Months Ended
	Sep. 30, 2019
Portfolio loans
Portfolio loans	Note 4: Portfolio loans ​ The distribution of portfolio loans is as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ 2019 2018 Commercial ​ $ 1,680,491 ​ $ 1,405,106 Commercial real estate ​ ​ 2,793,380 ​ ​ 2,366,823 Real estate construction ​ ​ 426,559 ​ ​ 288,197 Retail real estate ​ ​ 1,717,555 ​ ​ 1,480,133 Retail other ​ ​ 51,430 ​ ​ 28,169 Portfolio loans ​ $ 6,669,415 ​ $ 5,568,428 ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses ​ ​ (52,965) ​ ​ (50,648) Portfolio loans, net ​ $ 6,616,450 ​ $ 5,517,780 ​ Net deferred loan origination costs included in the table above were $5.4 million as of September 30, 2019 and $5.6 million as of December 31, 2018. Net accretable purchase accounting adjustments included in the table above reduced loans by $22.5 million as of September 30, 2019 and $13.9 million as of December 31, 2018. ​ The Company utilizes a loan grading scale to assign a risk grade to all of its loans. A description of the general characteristics of each grade is as follows: ​ ● Pass - This category includes loans that are all considered acceptable credits, ranging from investment or near investment grade, to loans made to borrowers who exhibit credit fundamentals that meet or exceed industry standards. ​ ● Watch- This category includes loans that warrant a higher than average level of monitoring to ensure that weaknesses do not cause the inability of the credit to perform as expected. These loans are not necessarily a problem due to other inherent strengths of the credit, such as guarantor strength, but have above average concern and monitoring. ​ ● Special mention- This category is for “Other Assets Specially Mentioned” loans that have potential weaknesses, which may, if not checked or corrected, weaken the asset or inadequately protect the Company’s credit position at some future date. ​ ● Substandard- This category includes “Substandard” loans, determined in accordance with regulatory guidelines, for which the accrual of interest has not been stopped. Assets so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. ​ ● Substandard Non-accrual- This category includes loans that have all the characteristics of a “Substandard” loan with additional factors that make collection in full highly questionable and improbable. Such loans are placed on non-accrual status and may be dependent on collateral with a value that is difficult to determine. ​ All loans are graded at their inception. Most commercial lending relationships that are $1.0 million or less are processed through an expedited underwriting process. If the credit receives a pass grade, it is aggregated into a homogenous pool of either: $0.35 million or less, or $0.35 million to $1.0 million. These pools are monitored on a regular basis and reviewed annually. Most commercial loans greater than $1.0 million are included in a portfolio review at least annually. Commercial loans greater than $0.35 million that have a grading of special mention or worse are reviewed on a quarterly basis. Interim reviews may take place if circumstances of the borrower warrant a more timely review. ​ The following table is a summary of risk grades segregated by category of portfolio loans (excluding accretable purchase accounting adjustments and clearings) (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ ​ ​ Special ​ Substandard ​ Pass Watch Mention Substandard Non-accrual Commercial $ 1,393,420 ​ $ 167,439 ​ $ 63,516 ​ $ 47,765 ​ $ 10,708 Commercial real estate 2,474,248 ​ 189,443 ​ 91,689 ​ 38,018 ​ 11,852 Real estate construction 397,377 ​ 24,050 ​ 5,151 ​ 1,130 ​ 611 Retail real estate 1,670,187 ​ 14,231 ​ 7,565 ​ 7,963 ​ 8,591 Retail other 51,752 ​ 79 ​ — ​ 13 ​ 65 Total ​ $ 5,986,984 ​ $ 395,242 ​ $ 167,921 ​ $ 94,889 ​ $ 31,827 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ ​ ​ Special ​ Substandard ​ Pass Watch Mention Substandard Non-accrual Commercial $ 1,126,257 ​ $ 172,449 ​ $ 47,000 ​ $ 42,532 ​ $ 17,953 Commercial real estate 2,106,711 ​ 137,214 ​ 85,148 ​ 36,205 ​ 10,298 Real estate construction 268,069 ​ 14,562 ​ 3,899 ​ 1,888 ​ 18 Retail real estate 1,448,964 ​ 6,425 ​ 6,792 ​ 5,435 ​ 6,698 Retail other 26,707 ​ — ​ — ​ — ​ 30 Total ​ $ 4,976,708 ​ $ 330,650 ​ $ 142,839 ​ $ 86,060 ​ $ 34,997 ​ An analysis of portfolio loans that are past due and still accruing or on a non-accrual status is as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ ​ Loans past due, still accruing ​ Non-accrual ​ 30-59 Days 60-89 Days 90+Days Loans Commercial ​ $ 464 ​ $ 584 ​ $ 698 ​ $ 10,708 Commercial real estate ​ 474 ​ 3,040 ​ 222 ​ 11,852 Real estate construction ​ 229 ​ 198 ​ — ​ 611 Retail real estate ​ 4,119 ​ 3,252 ​ 354 ​ ​ 8,591 Retail other ​ 66 ​ 8 ​ 2 ​ 65 Total ​ $ 5,352 ​ $ 7,082 ​ $ 1,276 ​ $ 31,827 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ ​ Loans past due, still accruing ​ Non-accrual ​ 30-59 Days 60-89 Days 90+Days Loans Commercial ​ $ 158 ​ $ 140 ​ $ 775 ​ $ 17,953 Commercial real estate ​ 148 ​ 558 ​ — ​ 10,298 Real estate construction ​ 121 ​ — ​ 58 ​ 18 Retail real estate ​ 4,578 ​ 1,368 ​ 766 ​ 6,698 Retail other ​ 48 ​ 2 ​ 2 ​ 30 Total ​ $ 5,053 ​ $ 2,068 ​ $ 1,601 ​ $ 34,997 ​ The gross interest income that would have been recorded in the three months ended September 30, 2019 and 2018 if impaired loans had been current in accordance with their original terms was $0.5 million and $0.4 million, respectively. The gross interest income that would have been recorded in the nine months ended September 30, 2019 and 2018 if impaired loans had been current in accordance with their original terms was $1.6 million and $1.1 million, respectively. The amount of interest collected on those loans and recognized on a cash basis that was included in interest income was insignificant for the three and nine months ended September 30, 2019 and 2018. ​ A summary of troubled debt restructurings (“TDR”) loans is as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, ​ ​ 2019 2018 In compliance with modified terms ​ $ 8,778 ​ $ 8,319 30 — 89 days past due ​ — ​ 127 Included in non-performing loans ​ 3,557 ​ 392 Total ​ $ 12,335 ​ $ 8,838 ​ Loans classified as a TDR during the three and nine months ended September 30, 2019 included one commercial loan for short-term interest rate relief, with a recorded investment of $0.3 million. There were no loans classified as TDRs during the three months ended September 30, 2018. Loans classified as a TDR during the nine months ended September 30, 2018 included one retail real estate modification for short-term interest rate relief, with a recorded investment of $0.1 million. ​ The gross interest income that would have been recorded in the three and nine months ended September 30, 2019 and 2018 if TDRs had performed in accordance with their original terms compared with their modified terms was insignificant. ​ One commercial real estate TDR, with a recorded investment of $3.2 million, that was entered into during the last 12 months, was subsequently classified as non-performing and had payment defaults (a default occurs when a loan is 90 days or more past due or transferred to non-accrual) during the nine months ended September 30, 2019. There were no TDRs that were entered into during the prior twelve months that were subsequently classified as non-performing and had payment defaults during the three and nine months ended September 30, 2018. ​ At September 30, 2019, the Company had $3.1 million of residential real estate in the process of foreclosure. ​ The following tables provide details of loans identified as impaired, segregated by category. The unpaid contractual principal balance represents the recorded balance prior to any partial charge-offs. The recorded investment represents customer balances net of any partial charge-offs recognized on the loan. The average recorded investment is calculated using the most recent four quarters (dollars in thousands) . ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ Unpaid Recorded ​ ​ ​ ​ ​ ​ Contractual ​ Investment ​ Recorded ​ Total ​ ​ ​ ​ Average ​ ​ Principal ​ with No ​ Investment ​ Recorded ​ Related ​ Recorded ​ Balance Allowance with Allowance Investment Allowance Investment Commercial ​ $ 16,593 ​ $ 9,237 ​ $ 3,262 ​ $ 12,499 ​ $ 2,671 ​ $ 16,070 Commercial real estate ​ 19,011 ​ ​ 8,566 ​ ​ 8,823 ​ 17,389 ​ 2,497 ​ 18,104 Real estate construction ​ 1,071 ​ 929 ​ — ​ 929 ​ — ​ 759 Retail real estate ​ 14,869 ​ 13,141 ​ 474 ​ 13,615 ​ 474 ​ 13,569 Retail other ​ 98 ​ 67 ​ — ​ 67 ​ — ​ 37 Total ​ $ 51,642 ​ $ 31,940 ​ $ 12,559 ​ $ 44,499 ​ $ 5,642 ​ $ 48,539 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ Unpaid Recorded ​ ​ ​ ​ ​ ​ Contractual ​ Investment ​ Recorded ​ Total ​ ​ ​ ​ Average ​ ​ Principal ​ with No ​ Investment ​ Recorded ​ Related ​ Recorded ​ Balance Allowance with Allowance Investment Allowance Investment Commercial ​ $ 21,442 ​ $ 6,858 ​ $ 12,001 ​ $ 18,859 ​ $ 4,319 ​ $ 13,364 Commercial real estate ​ 19,079 ​ 13,082 ​ 4,498 ​ 17,580 ​ 1,181 ​ 18,077 Real estate construction ​ 478 ​ 453 ​ — ​ 453 ​ — ​ 712 Retail real estate ​ 14,418 ​ 13,196 ​ 61 ​ 13,257 ​ 61 ​ 14,110 Retail other ​ 117 ​ 33 ​ — ​ 33 ​ — ​ 40 Total ​ $ 55,534 ​ $ 33,622 ​ $ 16,560 ​ $ 50,182 ​ $ 5,561 ​ $ 46,303 ​ Management's evaluation as to the ultimate collectability of loans includes estimates regarding future cash flows from operations and the value of property, real and personal, pledged as collateral. These estimates are affected by changing economic conditions and the economic prospects of borrowers. ​ The Company holds acquired loans from business combinations with uncollected principal balances. These loans are carried net of a fair value adjustment for credit risk and interest rates and are only included in the allowance calculation to the extent that the reserve requirement exceeds the fair value adjustment. As the acquired loans renew, it is generally necessary to establish an allowance, which represents an amount that, in management’s opinion, will be adequate to absorb probable credit losses in such loans. The recorded investment of all acquired loans as of September 30, 2019 totaled approximately $1.7 billion. ​ The following table details activity in the allowance for loan losses. Allocation of a portion of the allowance to one category does not preclude its availability to absorb losses in other categories (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of and for the Three Months Ended September 30, 2019 ​ ​ Commercial Real Estate Retail Real ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Beginning balance ​ $ 16,733 ​ $ 20,188 ​ $ 3,305 ​ $ 10,613 ​ $ 536 ​ $ 51,375 Provision for loan losses ​ 463 ​ 3,167 ​ (359) ​ (86) ​ 226 ​ 3,411 Charged-off ​ (817) ​ (1,168) ​ — ​ ​ (226) ​ (288) ​ (2,499) Recoveries ​ 147 ​ 33 ​ 164 ​ 221 ​ 113 ​ 678 Ending balance ​ $ 16,526 ​ $ 22,220 ​ $ 3,110 ​ $ 10,522 ​ $ 587 ​ $ 52,965 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of and for the Nine Months Ended September 30, 2019 ​ ​ Commercial Real Estate Retail Real ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Beginning balance ​ $ 17,829 ​ $ 21,137 ​ $ 2,723 ​ $ 8,471 ​ $ 488 ​ $ 50,648 Provision for loan losses ​ 3,417 ​ 1,981 ​ 54 ​ 2,212 ​ 375 ​ 8,039 Charged-off ​ (5,187) ​ (1,183) ​ — ​ ​ (943) ​ (596) ​ (7,909) Recoveries ​ 467 ​ 285 ​ 333 ​ 782 ​ 320 ​ 2,187 Ending balance ​ $ 16,526 ​ $ 22,220 ​ $ 3,110 ​ $ 10,522 ​ $ 587 ​ $ 52,965 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of and for the Three Months Ended September 30, 2018 ​ ​ ​ ​ ​ Commercial ​ Real Estate ​ Retail Real ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Beginning balance $ 17,586 ​ $ 23,047 ​ $ 2,915 ​ $ 9,293 ​ $ 464 ​ $ 53,305 Provision for loan losses ​ 2,388 ​ (1,291) ​ (15) ​ (399) ​ 75 ​ 758 Charged-off ​ (1,144) ​ (62) ​ — ​ (695) ​ (286) ​ (2,187) Recoveries ​ 136 ​ 58 ​ 32 ​ 423 ​ 218 ​ 867 Ending balance $ 18,966 ​ $ 21,752 ​ $ 2,932 ​ $ 8,622 ​ $ 471 ​ $ 52,743 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of and for the Nine Months Ended September 30, 2018 ​ ​ ​ ​ ​ Commercial ​ Real Estate ​ Retail Real ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Beginning balance $ 14,779 ​ $ 21,813 ​ $ 2,861 ​ $ 13,783 ​ $ 346 ​ $ 53,582 Provision for loan losses ​ 7,111 ​ 1,154 ​ 22 ​ (4,609) ​ 346 ​ 4,024 Charged-off ​ (3,841) ​ (1,487) ​ (97) ​ (1,637) ​ (608) ​ (7,670) Recoveries ​ 917 ​ 272 ​ 146 ​ 1,085 ​ 387 ​ 2,807 Ending balance $ 18,966 $ 21,752 $ 2,932 $ 8,622 $ 471 $ 52,743 ​ The following table presents the allowance for loan losses and recorded investments in portfolio loans by category (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of September 30, 2019 ​ ​ ​ Commercial Real Estate Retail Real ​ ​ ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Allowance for loan losses ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance attributed to: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans individually evaluated for impairment ​ $ 2,671 ​ $ 2,497 ​ $ — ​ $ 474 ​ $ — ​ $ 5,642 Loans collectively evaluated for impairment ​ 13,855 ​ 19,723 ​ 3,110 ​ 10,048 ​ 587 ​ 47,323 Ending balance ​ $ 16,526 ​ $ 22,220 ​ $ 3,110 ​ $ 10,522 ​ $ 587 ​ $ 52,965 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans individually evaluated for impairment ​ $ 12,481 ​ $ 14,954 ​ $ 494 ​ $ 12,693 ​ $ 67 ​ $ 40,689 Loans collectively evaluated for impairment ​ 1,667,992 ​ 2,775,991 ​ 425,630 ​ 1,703,940 ​ 51,363 ​ 6,624,916 PCI loans evaluated for impairment ​ ​ 18 ​ ​ 2,435 ​ ​ 435 ​ ​ 922 ​ ​ — ​ ​ 3,810 Ending balance ​ $ 1,680,491 ​ $ 2,793,380 ​ $ 426,559 ​ $ 1,717,555 ​ $ 51,430 ​ $ 6,669,415 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2018 ​ ​ ​ Commercial Real Estate Retail Real ​ ​ ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Allowance for loan losses ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance attributed to: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans individually evaluated for impairment ​ $ 4,319 ​ $ 1,181 ​ $ — ​ $ 61 ​ $ — ​ $ 5,561 Loans collectively evaluated for impairment ​ 13,510 ​ 19,956 ​ 2,723 ​ 8,410 ​ 488 ​ 45,087 Ending balance ​ $ 17,829 ​ $ 21,137 ​ $ 2,723 ​ $ 8,471 ​ $ 488 ​ $ 50,648 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans individually evaluated for impairment ​ $ 18,441 ​ $ 15,318 ​ $ 453 ​ $ 13,159 ​ $ 33 ​ $ 47,404 Loans collectively evaluated for impairment ​ 1,386,247 ​ 2,349,243 ​ 287,744 ​ 1,466,876 ​ 28,136 ​ 5,518,246 PCI loans evaluated for impairment ​ ​ 418 ​ ​ 2,262 ​ ​ — ​ ​ 98 ​ ​ — ​ ​ 2,778 Ending balance ​ $ 1,405,106 ​ $ 2,366,823 ​ $ 288,197 ​ $ 1,480,133 ​ $ 28,169 ​ $ 5,568,428 ​

Deposits

Deposits	9 Months Ended
	Sep. 30, 2019
Deposits
Deposits	Note 5: Deposits ​ The composition of deposits is as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ December 31, 2018 Demand deposits, noninterest-bearing ​ $ 1,779,490 ​ $ 1,464,700 Interest-bearing transaction deposits ​ 2,039,095 ​ 1,435,574 Saving deposits and money market deposits ​ 2,458,910 ​ ​ 1,852,044 Time deposits ​ 1,652,971 ​ 1,497,003 Total ​ $ 7,930,466 ​ $ 6,249,321 ​ The Company held brokered saving deposits and money market deposits of $14.7 million and $17.5 million at September 30, 2019 and December 31, 2018, respectively. ​ The aggregate amount of time deposits with a minimum denomination of $100,000 was approximately $899.3 million and $673.7 million at September 30, 2019 and December 31, 2018, respectively. The aggregate amount of time deposits with a minimum denomination that meets or exceeds the Federal Deposit Insurance Corporation (“FDIC”) insurance limit of $250,000 was approximately $309.2 million and $264.1 million at September 30, 2019 and December 31, 2018, respectively. The Company held brokered time deposits of $57.3 million and $262.5 million at September 30, 2019 and December 31, 2018, respectively. ​ As of September 30, 2019, the scheduled maturities of time deposits are as follows (dollars in thousands) : ​ ​ ​ ​ ​ October 1, 2019 – September 30, 2020 ​ $ 468,221 October 1, 2020 – September 30, 2021 ​ ​ 167,271 October 1, 2021 – September 30, 2022 ​ 80,492 October 1, 2022 – September 30, 2023 ​ 55,019 October 1, 2023 – September 30, 2024 ​ 881,935 Thereafter ​ 33 ​ $ 1,652,971 ​

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2019
Borrowings
Borrowings	Note 6: Borrowings ​ Securities sold under agreements to repurchase, which are classified as secured borrowings, generally mature daily. Securities sold under agreements to repurchase are reflected at the amount of cash received in connection with the transaction. The underlying securities are held by the Company’s safekeeping agent. The Company may be required to provide additional collateral based on fluctuations in the fair value of the underlying securities. ​ Short-term borrowings include FHLB advances which mature in less than one year from date of origination. ​ On January 29, 2019, the Company entered into an Amended and Restated Credit Agreement providing for a $60.0 million term loan (the “Term Loan”) with a maturity date of November 30, 2023. The Term Loan has an annual interest rate of one-month LIBOR plus a spread of 1.50% . The proceeds of the Term Loan were used to fund the cash consideration related to the acquisition of Banc Ed. The Company had $55.5 million outstanding indebtedness on September 30, 2019, comprised of $6.0 million of short-term debt and $49.5 million of long-term debt. ​ The Amended and Restated Credit Agreement also retained the Company’s $20.0 million revolving facility with a maturity date of April 30, 2019. On April 19, 2019, the Company entered into an amendment to the Amended and Restated Credit Agreement to extend the maturity of its revolving loan facility to April 30, 2020. The revolving facility incurs a non-usage fee based on the undrawn amount. The Company had no outstanding balance under the revolving facility on September 30, 2019 or December 31, 2018. ​ ​ Long-term debt is summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ 2019 2018 Notes payable, FHLB, ranging in original maturity from seven to 10 years , collateralized by FHLB deposits, residential and commercial real estate loans and FHLB stock. ​ $ 35,606 ​ $ 50,000 Notes payable ​ ​ 49,500 ​ ​ — Total long-term borrowings ​ $ 85,106 ​ $ 50,000 ​ As of September 30, 2019, long-term debt from the FHLB consisted of variable-rate notes maturing through September 2024, with interest rates ranging from 1.57% to 3.04% . The weighted average rate on the long-term advances was 1.80% as of September 30, 2019. As of December 31, 2018, funds borrowed from the FHLB, listed above, consisted of variable-rate notes maturing through September 2024, with interest rates ranging from 2.20% to 2.41% . The weighted average rate on the long-term advances was 2.28% as of December 31, 2018. ​ On May 25, 2017, the Company issued $40.0 million of 3.75% senior notes that mature on May 25, 2022. The senior notes are payable semi-annually on each May 25 and November 25, commencing on November 25, 2017. The senior notes are not subject to optional redemption by the Company. Additionally, on May 25, 2017, the Company issued $60.0 million of fixed-to-floating rate subordinated notes that mature on May 25, 2027. The subordinated notes, which qualify as Tier 2 capital for First Busey, bear interest at an annual rate of 4.75% for the first five years after issuance and thereafter bear interest at a floating rate equal to three-month LIBOR plus a spread of 2.919% , as calculated on each applicable determination date. The subordinated notes are payable semi-annually on each May 25 and November 25, commencing on November 25, 2017 during the five year fixed-term and thereafter on February 25, May 25, August 25 and November 25 of each year, commencing on August 25, 2022. The subordinated notes have an optional redemption in whole or in part on any interest payment date on or after May 25, 2022. The senior notes and subordinated notes are unsecured obligations of the Company. Unamortized debt issuance costs related to the senior notes and subordinated notes totaled $0.4 million and $0.8 million, respectively, at September 30, 2019. Unamortized debt issuance costs related to the senior notes and subordinated notes totaled $0.5 million and $0.9 million, respectively, at December 31, 2018.

Junior Subordinated Debt Owed t

Junior Subordinated Debt Owed to Unconsolidated Trusts	9 Months Ended
	Sep. 30, 2019
Junior Subordinated Debt Owed to Unconsolidated Trusts
Junior Subordinated Debt Owed to Unconsolidated Trusts	Note 7: Junior Subordinated Debt Owed to Unconsolidated Trusts ​ First Busey maintains statutory trusts for the sole purpose of issuing and servicing trust preferred securities and related trust common securities. The proceeds from such issuances were used by the trusts to purchase junior subordinated notes of the Company, which are the sole assets of each trust. Concurrent with the issuance of the trust preferred securities, the Company issued guarantees for the benefit of the holders of the trust preferred securities. The trust preferred securities are instruments that qualify, and are treated by the Company, as Tier 1 regulatory capital. The Company owns all of the common securities of each trust. The trust preferred securities issued by each trust rank equally with the common securities in right of payment, except that if an event of default under the indenture governing the notes has occurred and is continuing, the preferred securities will rank senior to the common securities in right of payment. In connection with the acquisition of Pulaski Financial Corp. (“Pulaski”) in 2016, the Company acquired similar statutory trusts maintained by Pulaski and the fair value adjustment is being accreted over the weighted average remaining life. The Company had $71.3 million and $71.2 million of junior subordinated debt owed to unconsolidated trusts at September 30, 2019 and December 31, 2018, respectively. ​ The trust preferred securities are subject to mandatory redemption, in whole or in part, upon repayment of the junior subordinated notes at par value at the stated maturity date or upon redemption. Each trust’s ability to pay amounts due on the trust preferred securities is solely dependent upon the Company making payment on the related junior subordinated notes. ​ ​ The Company’s obligations under the junior subordinated notes and other relevant trust agreements, in aggregate, constitute a full and unconditional guarantee by the Company of each trust’s obligations under the trust preferred securities issued by each trust. The Company has the right to defer payment of interest on the notes, in which case the distributions on the trust preferred securities will also be deferred, for up to five years , but not beyond the stated maturity date. Under current banking regulations, bank holding companies are allowed to include qualifying trust preferred securities in their Tier 1 Capital for regulatory capital purposes, subject to a 25% limitation to all core (Tier 1) capital elements, net of goodwill and other intangible assets less any associated deferred tax liability. As of September 30, 2019, 100% of the trust preferred securities qualified as Tier 1 capital under the final rule adopted in March 2005. ​ The Dodd-Frank Act mandated the Federal Reserve to establish minimum capital levels for holding companies on a consolidated basis as stringent as those required for FDIC-insured institutions. A result of this change is that the proceeds of hybrid instruments, such as trust preferred securities, are excluded from capital over a phase-out period. However, if such securities were issued prior to May 19, 2010 by bank holding companies with less than $15.0 billion of assets, they may be retained, subject to certain restrictions. Because the Company has assets of less than $15.0 billion, it is able to maintain its trust preferred proceeds as capital, but the Company has to comply with new capital mandates in other respects and will not be able to raise capital in the future through the issuance of trust preferred securities.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Common Share
Earnings Per Common Share	Note 8: Earnings Per Common Share ​ Earnings per common share have been computed as follows (in thousands, except per share data) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ ​ ​ September 30, ​ September 30, ​ ​ 2019 2018 2019 2018 ​ Net income ​ $ 24,828 ​ $ 26,859 ​ $ 74,382 ​ $ 73,638 ​ Shares: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average common shares outstanding ​ 55,410 ​ 48,892 ​ 54,783 ​ 48,828 ​ Dilutive effect of outstanding options, warrants and restricted stock units as determined by the application of the treasury stock method ​ 236 ​ 355 ​ 275 ​ 388 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average common shares outstanding, as adjusted for diluted earnings per share calculation ​ 55,646 ​ 49,247 ​ 55,058 ​ 49,216 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic earnings per common share ​ $ 0.45 ​ $ 0.55 ​ $ 1.36 ​ $ 1.51 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted earnings per common share ​ $ 0.45 ​ $ 0.55 ​ $ 1.35 ​ $ 1.50 ​ ​ Basic earnings per share is computed by dividing net income for the period by the weighted average number of common shares outstanding, which include deferred stock units that are vested but not delivered. ​ Diluted earnings per common share is computed using the treasury stock method and reflects the potential dilution that could occur if the Company’s outstanding stock options and warrants were exercised and restricted stock units were vested. At September 30, 2019, 385,322 outstanding restricted stock units and 191,278 warrants were anti-dilutive and excluded from the calculation of common stock equivalents. At September 30, 2018, 172,571 outstanding restricted stock equivalents and 191,278 warrants were anti-dilutive and excluded from the calculation of common stock equivalents.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income (Loss).	Note 9: Accumulated Other Comprehensive Income (Loss) ​ The following table represents changes in accumulated other comprehensive income (loss) by component, net of tax, for the periods below (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ ​ September 30, ​ ​ 2019 ​ ​ 2018 ​ ​ ​ Before Tax ​ Tax Effect ​ Net of Tax ​ ​ Before Tax ​ Tax Effect ​ Net of Tax Unrealized gains (losses) on debt securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at beginning of period ​ $ 20,459 $ (5,832) $ 14,627 ​ $ (15,197) $ 4,332 $ (10,865) Unrealized holding gains (losses) on debt securities available for sale, net ​ ​ 4,991 ​ (1,423) ​ 3,568 ​ ​ (3,019) ​ 860 ​ (2,159) Unrealized gains on debt securities transferred from held to maturity to available for sale ​ ​ — ​ — ​ — ​ ​ — ​ — ​ — Amounts reclassified from accumulated other comprehensive income, net ​ ​ (297) ​ 85 ​ (212) ​ ​ — ​ — ​ — Tax Cuts and Jobs Act of 2017 reclassification ​ ​ — ​ — ​ — ​ ​ — ​ — ​ — Balance at end of period ​ $ 25,153 $ (7,170) $ 17,983 ​ $ (18,216) $ 5,192 $ (13,024) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized gains (losses) on cash flow hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at beginning of period ​ ​ — ​ — ​ — ​ ​ — ​ — ​ — Unrealized holding gains (losses) on cash flow hedges, net ​ ​ (837) ​ 239 ​ (598) ​ ​ — ​ — ​ — Amounts reclassified from accumulated other comprehensive income, net ​ ​ 9 ​ (3) ​ 6 ​ ​ — ​ — ​ — Balance at end of period ​ $ (828) $ 236 $ (592) ​ $ — $ — $ — Total accumulated other comprehensive income (loss) ​ $ 24,325 $ (6,934) $ 17,391 ​ $ (18,216) $ 5,192 $ (13,024) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine Months Ended ​ ​ ​ September 30, ​ ​ 2019 ​ ​ 2018 ​ ​ ​ Before Tax ​ Tax Effect ​ Net of Tax ​ ​ Before Tax ​ Tax Effect ​ Net of Tax Unrealized gains (losses) on debt securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at beginning of period ​ $ (9,528) ​ 2,716 ​ (6,812) ​ $ (4,777) ​ 1,967 ​ (2,810) Unrealized holding gains (losses) on debt securities available for sale, net ​ ​ 30,005 ​ (8,552) ​ 21,453 ​ ​ (13,439) ​ 3,830 ​ (9,609) Unrealized gains on debt securities transferred from held to maturity to available for sale ​ ​ 4,780 ​ (1,363) ​ 3,417 ​ ​ — ​ — ​ — Amounts reclassified from accumulated other comprehensive income, net ​ ​ (104) ​ 29 ​ (75) ​ ​ — ​ — ​ — Tax Cuts and Jobs Act of 2017 reclassification ​ ​ — ​ — ​ — ​ ​ — ​ (605) ​ (605) Balance at end of period ​ $ 25,153 ​ (7,170) ​ 17,983 ​ $ (18,216) ​ 5,192 ​ (13,024) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized gains (losses) on cash flow hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at beginning of period ​ ​ — ​ — ​ — ​ ​ — ​ — ​ — Unrealized holding gains (losses) on cash flow hedges, net ​ ​ (837) ​ 239 ​ (598) ​ ​ — ​ — ​ — Amounts reclassified from accumulated other comprehensive income, net ​ ​ 9 ​ (3) ​ 6 ​ ​ — ​ — ​ — Balance at end of period ​ $ (828) ​ 236 ​ (592) ​ $ — ​ — ​ — Total accumulated other comprehensive income (loss) ​ $ 24,325 ​ (6,934) ​ 17,391 ​ $ (18,216) ​ 5,192 ​ (13,024)

Share-based Compensation

Share-based Compensation	9 Months Ended
	Sep. 30, 2019
Share-based Compensation
Share-based Compensation	Note 10: Share-based Compensation ​ The Company currently grants share-based compensation in the form of restricted stock units (“RSUs”) and deferred stock units (“DSUs”). The Company grants RSUs to members of management periodically throughout the year. Each RSU is equivalent to one share of the Company’s common stock. These units have requisite service periods ranging from one to five years . The Company annually grants share-based awards in the form of DSUs, which are RSUs with a deferred settlement date, to its board of directors and advisory directors. Each DSU is equivalent to one share of the Company’s common stock. The DSUs vest over a twelve-month period following the grant date or on the date of the next Annual Meeting of Stockholders, whichever is earlier. These units generally are subject to the same terms as RSUs under the Company’s 2010 Equity Plan or the First Community 2016 Equity Plan, except that, following vesting, settlement occurs within 30 days following the earlier of separation from the board or a change in control of the Company. Subsequent to vesting and prior to delivery, these units will continue to earn dividend equivalents. The Company also has outstanding stock options granted prior to 2011 and stock options assumed from acquisitions. ​ A description of the 2010 Equity Incentive Plan, which was amended in 2015, can be found in the Company’s Proxy Statement for the 2015 Annual Meeting of Stockholders. A description of the First Community 2016 Equity Incentive Plan can be found in the Proxy Statement of First Community Financial Partners, Inc. for the 2016 Annual Meeting of Stockholders. ​ Stock Option Plan ​ A summary of the status of and changes in the Company's stock option awards for the nine months ended September 30, 2019 follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted- ​ Weighted- ​ ​ ​ ​ Average ​ Average ​ ​ ​ ​ Exercise ​ Remaining Contractual ​ Shares Price Term Outstanding at beginning of period 87,600 $ 20.58 ​ ​ Exercised (23,561) ​ 17.69 ​ ​ Forfeited (3,003) ​ 23.53 ​ ​ Expired (5,767) ​ 17.38 ​ ​ Outstanding at end of period 55,269 $ 21.99 6.11 Exercisable at end of period 39,825 $ 21.39 5.71 ​ The Company recorded an insignificant amount and $0.1 million in stock option compensation expense for the three and nine months ended September 30, 2019, related to the converted options from First Community. The Company recorded $0.1 million and $0.2 million in stock option compensation expense for the three and nine months ended September 30, 2018, respectively. As of September 30, 2019, the Company had an insignificant amount of unrecognized stock option expense. This cost is expected to be recognized the fourth quarter of 2019. ​ Restricted Stock Unit Plan ​ A summary of the changes in the Company’s stock unit awards for the nine months ended September 30, 2019, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted- ​ Director ​ Weighted- ​ ​ Restricted ​ Average ​ Deferred ​ Average ​ ​ Stock ​ Grant Date ​ Stock ​ Grant Date ​ Units Fair Value Units Fair Value Non-vested at beginning of period 690,495 $ 26.14 20,449 $ 27.93 Granted 216,411 ​ 26.73 20,984 ​ 26.78 Dividend equivalents earned 17,559 ​ 26.07 1,961 ​ 26.07 Vested (104,760) ​ 18.40 (20,723) ​ 31.18 Forfeited (4,712) ​ 30.47 (1,523) ​ 31.62 Non-vested at end of period 814,993 $ 27.26 21,148 $ 23.17 Outstanding at end of period 814,993 $ 27.26 89,831 $ 23.36 ​ Recipients earn quarterly dividend equivalents on their respective units which entitle the recipients to additional units. Therefore, dividends earned each quarter compound based upon the updated unit balances. Upon vesting/delivery, shares are expected (though not required) to be issued from treasury. ​ On July 5, 2019, under the terms of the 2010 Equity Incentive Plan, the Company granted 185,400 RSUs to members of management, and under the terms of the First Community 2016 Equity Incentive Plan, granted 10,644 RSUs to members of management who were legacy First Community employees. As the stock price on the grant date of July 5, 2019 was $26.78 , total compensation cost to be recognized is $5.3 million. This cost will be recognized over a period of five years . Subsequent to the requisite service period, the awards will become 100% vested . Further, the Company granted 8,775 RSUs, under the terms of the 2010 Equity Incentive Plan, to the Chairman of the Board. As the stock price on the grant date of July 5, 2019 was $26.78 , total compensation cost to be recognized is $0.2 million. This cost will be recognized over a period of five years . Subsequent to the requisite service period, the awards will become 100% vested. Finally, on September 25, 2019, under the terms of the 2010 Equity Incentive Plan, the Company granted 11,592 RSUs to a member of management. As the stock price on the grant date of September 25, 2019 was $25.88 , total compensation cost to be recognized is $0.3 million. This cost will be recognized over a period of three years . Subsequent to the requisite service period, the awards will become 100% vested. ​ On July 5, 2019, under the terms of the 2010 Equity Incentive Plan, the Company granted 17,549 DSUs to directors, and under the terms of the First Community 2016 Equity Incentive Plan, granted 1,867 DSUs to a director who was a legacy First Community director. In addition, under the terms of the 2010 Equity Incentive Plan, the Company granted 1,568 advisory DSUs to advisory directors. As the stock price on the grant date of July 5, 2019 was $26.78 , total compensation cost to be recognized is $0.6 million. These costs will be recognized over the requisite service period of one year from the date of grant or the next Annual Meeting of Stockholders, whichever is earlier. ​ The Company recognized $1.2 million and $0.9 million of compensation expense related to both non-vested RSUs and DSUs for the three months ended September 30, 2019 and 2018, respectively. The Company recognized $3.1 million and $2.5 million of compensation expense related to both non-vested RSUs and DSUs for the nine months ended September 30, 2019 and 2018, respectively. As of September 30, 2019, there was $14.0 million of total unrecognized compensation cost related to these non-vested stock awards. This cost is expected to be recognized over a period of 3.6 years. ​ As of September 30, 2019, 535,377 shares remain available for issuance pursuant to the Company’s 2010 Equity Incentive Plan, 50,463 shares remain available for issuance pursuant to the Company’s Employee Stock Purchase Plan and 297,216 shares remain available for issuance pursuant to the First Community 2016 Equity Incentive Plan.

Outstanding Commitments and Con

Outstanding Commitments and Contingent Liabilities	9 Months Ended
	Sep. 30, 2019
Outstanding Commitments and Contingent Liabilities
Outstanding Commitments and Contingent Liabilities	Note 11: Outstanding Commitments and Contingent Liabilities ​ Legal Matters ​ The Company is a party to legal actions which arise in the normal course of its business activities. In the opinion of management, the ultimate resolution of these matters is not expected to have a material effect on the financial position or the results of operations of the Company. ​ Credit Commitments and Contingencies ​ A summary of the contractual amount of the Company’s exposure to off-balance-sheet risk relating to the Company’s commitments to extend credit and standby letters of credit follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 December 31, 2018 Financial instruments whose contract amounts represent credit risk: ​ ​ ​ ​ ​ ​ Commitments to extend credit ​ $ 1,664,799 ​ $ 1,398,483 Standby letters of credit ​ 40,073 ​ 32,156 ​

Regulatory Capital

Regulatory Capital	9 Months Ended
	Sep. 30, 2019
Regulatory Capital
Regulatory Capital	Note 12: Regulatory Capital ​ The Company and the subsidiary banks are subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory—and possibly additional discretionary—actions by regulators that, if undertaken, could have a direct material effect on the Company's consolidated financial statements. The capital amounts and classification also are subject to qualitative judgments by the regulators about components, risk weightings and other factors. ​ Banking regulations identify five capital categories for insured depository institutions: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized and critically undercapitalized. As of September 30, 2019 and December 31, 2018, all capital ratios of the Company and the subsidiary banks exceeded the well capitalized levels under the applicable regulatory capital adequacy guidelines. Management believes that no events or changes have occurred subsequent to September 30, 2019 that would change this designation. ​ The following tables summarize the applicable holding company and bank regulatory capital requirements (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ To Be Well ​ Actual ​ ​ Capital Requirement ​ ​ Capitalized ​ Amount Ratio ​ Amount Ratio ​ Amount Ratio As of September 30, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 1,020,195 13.71 % ​ $ 595,295 8.00 % ​ $ 744,118 10.00 % Busey Bank $ 883,146 13.93 % ​ $ 507,070 8.00 % ​ $ 633,837 10.00 % TheBANK $ 198,244 18.08 % ​ $ 87,743 8.00 % ​ $ 109,678 10.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 907,230 12.19 % ​ $ 446,471 6.00 % ​ $ 595,295 8.00 % Busey Bank $ 830,995 13.11 % ​ $ 380,303 6.00 % ​ $ 507,070 8.00 % TheBANK $ 197,430 18.00 % ​ $ 65,807 6.00 % ​ $ 87,743 8.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common Equity Tier 1 Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 833,230 11.20 % ​ $ 334,854 4.50 % ​ $ 483,677 6.50 % Busey Bank $ 830,995 13.11 % ​ $ 285,227 4.50 % ​ $ 411,994 6.50 % TheBANK $ 197,430 18.00 % ​ $ 49,356 4.50 % ​ $ 71,291 6.50 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital (to Average Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 907,230 9.78 % ​ $ 371,129 4.00 % ​ N/A N/A ​ Busey Bank $ 830,995 11.12 % ​ $ 298,943 4.00 % ​ $ 373,679 5.00 % TheBANK $ 197,430 10.55 % ​ $ 74,851 4.00 % ​ $ 93,563 5.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ To Be Well ​ ​ Actual ​ ​ Capital Requirement ​ ​ Capitalized ​ ​ Amount Ratio ​ Amount Ratio ​ Amount Ratio ​ As of December 31, 2018: ​ ​ Total Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 894,572 14.83 % ​ $ 482,638 8.00 % ​ $ 603,297 10.00 % Busey Bank $ 854,351 14.19 % ​ $ 481,701 8.00 % ​ $ 602,126 10.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 783,924 12.99 % ​ $ 361,978 6.00 % ​ $ 482,638 8.00 % Busey Bank $ 803,703 13.35 % ​ $ 361,276 6.00 % ​ $ 481,701 8.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common Equity Tier 1 Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 709,924 11.77 % ​ $ 271,484 4.50 % ​ $ 392,143 6.50 % Busey Bank $ 803,703 13.35 % ​ $ 270,957 4.50 % ​ $ 391,382 6.50 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital (to Average Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 783,924 10.36 % ​ $ 302,704 4.00 % ​ N/A N/A ​ Busey Bank $ 803,703 10.64 % ​ $ 302,232 4.00 % ​ $ 377,789 5.00 % ​ ​ ​ ​ ​ ​ ​ In July 2013, the U.S. federal banking authorities approved the Basel III Rule for strengthening international capital standards. The Basel III Rule introduced a capital conservation buffer, composed entirely of Common Equity Tier 1 Capital (“CET1”), which is added to the minimum risk-weighted asset ratios. The capital conservation buffer is not a minimum capital requirement; however, banking institutions with a ratio of CET1 to risk-weighted assets below the capital conservation buffer will face constraints on dividends, equity repurchases and discretionary bonus payments based on the amount of the shortfall. In order to refrain from restrictions on dividends, equity repurchases and discretionary bonus payments, banking institutions must maintain minimum ratios of (i) CET1 to risk-weighted assets of at least 7.00%, (ii) Tier 1 capital to risk-weighted assets of at least 8.50%, and (iii) Total capital to risk-weighted assets of at least 10.50%. ​ The ability of the Company to pay cash dividends to its stockholders and to service its debt is dependent on the receipt of cash dividends from its subsidiaries. Under applicable regulatory requirements, an Illinois state-chartered bank such as Busey Bank may not pay dividends in excess of its net profits. Because Busey Bank had been in an accumulated deficit position from 2009 thru 2018, it was not able to pay dividends in prior years. With prior approval from its regulators, however, an Illinois state-chartered bank in that situation was able to reduce its capital stock by amending its charter to decrease the authorized number of shares, and then make a subsequent distribution to its holding company. Using this approach, and with the approval of its regulators, Busey Bank has distributed funds to the Company, most recently in the amount of $40.0 million on October 12, 2018. Busey Bank returned to a positive retained earnings position in the second quarter of 2018 and, in 2019, returned to paying dividends.

Operating Segments and Related

Operating Segments and Related Information	9 Months Ended
	Sep. 30, 2019
Operating Segments and Related Information
Operating Segments and Related Information	Note 13: Operating Segments and Related Information ​ The Company has three reportable operating segments, Banking, Remittance Processing and Wealth Management. The Banking operating segment provides a full range of banking services to individual and corporate customers through its banking center network in Illinois, St. Louis, Missouri metropolitan area, southwest Florida and through its banking center in Indianapolis, Indiana. Banking services for Busey Bank and TheBANK are aggregated into the banking operating segment as they have similar operations and activities. The Remittance Processing operating segment provides for online bill payments, lockbox and walk-in payments. The Wealth Management operating segment provides a full range of asset management, investment and fiduciary services to individuals, businesses and foundations, tax preparation, philanthropic advisory services and farm and brokerage services. ​ The Company’s three operating segments are strategic business units that are separately managed as they offer different products and services and have different marketing strategies. The “other” category consists of the Parent Company and the elimination of intercompany transactions. ​ The segment financial information provided below has been derived from information used by management to monitor and manage the financial performance of the Company. The accounting policies of the three segments are the same as those described in the summary of significant accounting policies in the “Note 1. Significant Accounting Policies” to Form 10-K. The Company accounts for intersegment revenue and transfers at current market value. ​ Following is a summary of selected financial information for the Company’s operating segments (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Goodwill ​ Total Assets ​ September 30, 2019 December 31, 2018 September 30, 2019 December 31, 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 293,431 ​ $ 246,999 ​ $ 9,704,121 ​ $ 7,656,709 Remittance Processing ​ 8,992 ​ 8,992 ​ 43,138 ​ 39,278 Wealth Management ​ 20,276 ​ 11,694 ​ 28,587 ​ 20,992 Other ​ — ​ — ​ (22,086) ​ (14,622) Totals ​ $ 322,699 ​ $ 267,685 ​ $ 9,753,760 ​ $ 7,702,357 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, ​ Nine Months Ended September 30, ​ ​ 2019 2018 2019 2018 Net interest income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 75,955 ​ $ 62,578 ​ $ 222,537 ​ $ 186,103 ​ Remittance Processing ​ ​ 20 ​ ​ 17 ​ ​ 56 ​ ​ 49 ​ Wealth Management ​ — ​ 110 ​ — ​ 304 ​ Other ​ (2,499) ​ (1,931) ​ (7,306) ​ (5,553) ​ Total net interest income ​ $ 73,476 ​ $ 60,774 ​ $ 215,287 ​ $ 180,903 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-interest income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 18,301 ​ $ 11,196 ​ $ 46,743 ​ $ 33,827 ​ Remittance Processing ​ 4,088 ​ 4,042 ​ 12,386 ​ 11,812 ​ Wealth Management ​ 8,994 ​ 7,391 ​ 27,721 ​ 23,840 ​ Other ​ (447) ​ (776) ​ (2,073) ​ (2,338) ​ Total non-interest income ​ $ 30,936 ​ $ 21,853 ​ $ 84,777 ​ $ 67,141 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-interest expense: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 56,593 ​ $ 37,034 ​ $ 158,659 ​ $ 116,275 ​ Remittance Processing ​ ​ 2,746 ​ ​ 2,718 ​ ​ 8,099 ​ ​ 7,808 ​ Wealth Management ​ ​ 6,043 ​ ​ 4,307 ​ ​ 17,356 ​ ​ 13,921 ​ Other ​ ​ 2,739 ​ ​ 1,870 ​ ​ 9,190 ​ ​ 6,270 ​ Total non-interest expense ​ $ 68,121 ​ $ 45,929 ​ $ 193,304 ​ $ 144,274 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Income before income taxes: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 34,252 ​ $ 35,982 ​ $ 102,582 ​ $ 99,631 ​ Remittance Processing ​ ​ 1,362 ​ ​ 1,341 ​ ​ 4,343 ​ ​ 4,053 ​ Wealth Management ​ ​ 2,951 ​ ​ 3,194 ​ ​ 10,365 ​ ​ 10,223 ​ Other ​ ​ (5,685) ​ ​ (4,577) ​ ​ (18,569) ​ ​ (14,161) ​ Total income before income taxes ​ $ 32,880 ​ $ 35,940 ​ $ 98,721 ​ $ 99,746 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 25,731 ​ $ 26,486 ​ $ 76,837 ​ $ 73,235 ​ Remittance Processing ​ 972 ​ 957 ​ 3,102 ​ 2,896 ​ Wealth Management ​ 2,184 ​ 2,280 ​ 7,670 ​ 7,332 ​ Other ​ (4,059) ​ (2,864) ​ (13,227) ​ (9,825) ​ Total net income ​ $ 24,828 ​ $ 26,859 ​ $ 74,382 ​ $ 73,638 ​ ​

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Financial Instruments
Derivative Financial Instruments	Note 14: Derivative Financial Instruments ​ The Company utilizes interest rate swap agreements as part of its asset liability management strategy to help manage its interest rate risk position. Additionally, the Company enters into derivative financial instruments, including interest rate lock commitments issued to residential loan customers for loans that will be held for sale, forward sales commitments to sell residential mortgage loans to investors and interest rate swaps with customers and other third parties. See “Note 15: Fair Value Measurements” for further discussion of the fair value measurement of such derivatives. ​ Interest Rate Swaps Designated as Cash Flow Hedges: Starting in the third quarter of 2019, the Company entered into derivative instruments designated as a cash flow hedges. For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative instrument is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative instrument representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. ​ Interest rate swaps with notional amounts totaling $70.0 million as of September 30, 2019 were designated as cash flow hedges to hedge the risk of variability in cash flows (future interest payments) attributable to changes in the contractually specified 3 month LIBOR benchmark interest rate on the Company’s junior subordinated debt owed to unconsolidated trusts and were determined to be fully effective during the period. As such, no amount of ineffectiveness has been included in net income. The aggregate fair value of the swaps of $0.8 million is recorded in other liabilities in the unaudited consolidated financial statements at September 30, 2019, with changes in fair value recorded in other comprehensive income. The Company expects the hedges to remain fully effective during the remaining terms of the swaps. ​ A summary of the interest-rate swaps designated as cash flow hedges is presented below (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ December 31, 2018 ​ ​ Notional amount ​ $ 70,000 ​ ​ $ — ​ ​ Weighted average fixed pay rates ​ 1.80 % ​ — % ​ Weighted average receive rates ​ ​ 2.12 % ​ ​ — % ​ Weighted average maturity ​ ​ 4.11 yrs ​ ​ — yrs ​ Unrealized gains (losses) ​ $ 592 ​ ​ $ — ​ ​ ​ Interest income (expense) recorded on these swap transactions were insignificant during the three and nine months ended September 30, 2019. The Company expects $0.1 million of the unrealized gain to be reclassified from Other Comprehensive Income (“OCI”) to interest expense during the next 12 months. This reclassified amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations and the addition of other hedges subsequent to September 30, 2019. ​ The following table presents the net gains (losses) recorded in accumulated other comprehensive income and the unaudited Consolidated Statements of Income relating to cash flow derivative instruments for the periods presented (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2019 ​ ​ ​ ​ Amount of (gain) loss recognized in OCI (effective portion) ​ ​ ​ Amount of (gain) loss reclassified from OCI to interest income ​ ​ Amount of (gain) loss recognized in other non-interest income (ineffective portion) ​ Interest rate contracts ​ $ (598) ​ ​ $ (6) ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine Months Ended September 30, 2019 ​ ​ ​ ​ Amount of (gain) loss recognized in OCI (effective portion) ​ ​ ​ Amount of (gain) loss reclassified from OCI to interest income ​ ​ Amount of (gain) loss recognized in other non-interest income (ineffective portion) ​ Interest rate contracts ​ $ (598) ​ ​ $ (6) ​ $ — ​ ​ The Company pledged $0.8 million in cash to secure its obligation under these contracts at September 30, 2019. ​ Interest Rate Lock Commitments . At September 30, 2019 and December 31, 2018, the Company had issued $135.6 million and $27.2 million, respectively, of unexpired interest rate lock commitments to loan customers. Such interest rate lock commitments that meet the definition of derivative financial instruments under ASC Topic 815, Derivatives and Hedging, are carried at their fair values in other assets or other liabilities in the unaudited consolidated financial statements, with changes in the fair values of the corresponding derivative financial assets or liabilities recorded as either a charge or credit to current earnings during the period in which the changes occurred. ​ Forward Sales Commitments . At September 30, 2019 and December 31, 2018, the Company had issued $189.5 million and $48.6 million, respectively, of unexpired forward sales commitments to mortgage loan investors. Typically, the Company economically hedges mortgage loans held for sale and interest rate lock commitments issued to its residential loan customers related to loans that will be held for sale by obtaining corresponding best-efforts forward sales commitments with an investor to sell the loans at an agreed-upon price at the time the interest rate locks are issued to the customers. Forward sales commitments that meet the definition of derivative financial instruments under ASC Topic 815, Derivatives and Hedging, are carried at their fair values in other assets or other liabilities in the unaudited consolidated financial statements. While such forward sales commitments generally served as an economic hedge to the mortgage loans held for sale and interest rate lock commitments, the Company did not designate them for hedge accounting treatment. Changes in fair value of the corresponding derivative financial asset or liability were recorded as either a charge or credit to current earnings during the period in which the changes occurred. ​ The fair values of derivative assets and liabilities related to interest rate lock commitments and forward sales commitments recorded in the unaudited Consolidated Balance Sheets are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 December 31, 2018 Fair value recorded in other assets ​ $ 1,182 ​ $ 624 Fair value recorded in other liabilities ​ 1,707 ​ ​ 1,205 ​ The gross gains and losses on these derivative assets and liabilities related to interest rate lock commitments and forward sales commitments recorded in non-interest income and expense in the unaudited Consolidated Statements of Income are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, Nine Months Ended September 30, ​ ​ 2019 2018 2019 2018 ​ Gross gains ​ $ 1,655 ​ $ 641 ​ $ 4,662 ​ $ 2,396 ​ Gross (losses) ​ (1,706) ​ ​ (561) ​ (4,773) ​ ​ (2,669) ​ Net gains (losses) ​ $ (51) ​ $ 80 ​ $ (111) ​ $ (273) ​ ​ The impact of the net gains or losses on derivative financial instruments related to interest rate lock commitments issued to residential loan customers for loans that will be held for sale and forward sales commitments to sell residential mortgage loans to loan investors are almost entirely offset by a corresponding change in the fair value of loans held for sale. ​ Interest Rate Swaps Not Designated as Hedges. The Company may offer derivative contracts to its customers in connection with their risk management needs. The Company manages the risk associated with these contracts by entering into an equal and offsetting derivative with a third-party dealer. With notional values of $511.4 million and $243.7 million at September 30, 2019 and December 31, 2018, respectively, these contracts support variable rate, commercial loan relationships totaling $255.7 million and $121.8 million, respectively. These derivatives generally worked together as an economic interest rate hedge, but the Company did not designate them for hedge accounting treatment. Consequently, changes in fair value of the corresponding derivative financial asset or liability were recorded as either a charge or credit to current earnings during the period in which the changes occurred. ​ The fair values of derivative assets and liabilities related to derivatives for customers for interest rate swaps recorded in the unaudited Consolidated Balance Sheets are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ December 31, 2018 Fair value recorded in other assets ​ $ 16,643 ​ $ 1,438 Fair value recorded in other liabilities ​ ​ 16,643 ​ ​ 1,438 ​ The gross gains and losses on these derivative assets and liabilities recorded in non-interest income and non-interest expense in the unaudited Consolidated Statements of Income are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, ​ Nine Months Ended September 30, ​ ​ 2019 ​ 2018 ​ 2019 ​ 2018 Gross gains ​ $ 4,695 ​ $ 724 ​ $ 15,205 ​ $ 2,167 Gross losses ​ ​ (4,695) ​ ​ (724) ​ ​ (15,205) ​ ​ (2,167) Net gains (losses) ​ $ — ​ $ — ​ $ — ​ $ — ​ The Company pledged $18.6 million and $1.0 million in cash to secure its obligation under these contracts at September 30, 2019 and December 31, 2018, respectively.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019
Fair Value Measurements
Fair Value Measurements	Note 15: Fair Value Measurements ​ The fair value of an asset or liability is the price that would be received by selling that asset or paid in transferring that liability (exit price) in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. ASC Topic 820, Fair Value Measurement, establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: ​ Level 1 Inputs - Unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. ​ Level 2 Inputs - Inputs other than quoted prices included in level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. ​ Level 3 Inputs - Unobservable inputs for determining the fair values of assets or liabilities that reflect the Company’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. ​ A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. These valuation methodologies were applied to those Company assets and liabilities that are carried at fair value. ​ In general, fair value is based upon quoted market prices, when available. If such quoted market prices are not available, fair values are measured utilizing independent valuation techniques of identical or similar securities for which significant assumptions are derived primarily from or corroborated by observable data. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect, among other things, counterparty credit quality and the company's creditworthiness as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. While management believes the Company's valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. ​ Debt securities available for sale. Debt securities available for sale are reported at fair value utilizing level 2 measurements. The Company obtains fair value measurements from an independent pricing service. The independent pricing service utilizes evaluated pricing models that vary by asset class and incorporate available trade, bid and other market information. Because many fixed income securities do not trade on a daily basis, the independent pricing service applies available information, focusing on observable market data such as benchmark curves, benchmarking of like securities, sector groupings, and matrix pricing, to prepare evaluations. ​ The independent pricing service uses model processes, such as the Option Adjusted Spread model, to assess interest rate impact and develop prepayment scenarios. The models and processes take into account market conventions. For each asset class, a team of evaluators gathers information from market sources and integrates relevant credit information, perceived market movements and sector news into the evaluated pricing applications and models. ​ The market inputs that the independent pricing service normally seeks for evaluations of securities, listed in approximate order of priority, include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data including market research publications. The independent pricing service also monitors market indicators, industry and economic events. For certain security types, additional inputs may be used or some of the market inputs may not be applicable. Evaluators may prioritize inputs differently on any given day for any security based on market conditions, and not all inputs listed are available for use in the evaluation process for each security evaluation on a given day. Because the data utilized was observable, the securities have been classified as level 2. ​ Equity Securities. Equity securities are reported at fair value utilizing level 1 or level 2 measurements. For mutual funds, unadjusted quoted prices in active markets for identical assets are utilized to determine fair value at the measurement date and have been classified as level 1. For stock, quoted prices for identical or similar assets in markets that are not active are utilized and classified as level 2. ​ Loans Held for Sale. Loans held for sale are reported at fair value utilizing level 2 measurements. The fair value of the mortgage loans held for sale are measured using observable quoted market or contract prices or market price equivalents and are classified as level 2. ​ Derivative Assets and Derivative Liabilities . Derivative assets and derivative liabilities are reported at fair value utilizing level 2 measurements. The fair value of derivative assets and liabilities is determined based on prices that are obtained from a third-party which uses observable market inputs. Derivative assets and liabilities are classified as level 2. ​ The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total September 30, 2019 Inputs Inputs Inputs Fair Value Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities $ — ​ $ 51,651 ​ $ — ​ $ 51,651 Obligations of U.S. government corporations and agencies — ​ 205,613 ​ — ​ 205,613 Obligations of states and political subdivisions — ​ 269,062 ​ — ​ 269,062 Commercial mortgage-backed securities ​ — ​ ​ 123,568 ​ ​ — ​ ​ 123,568 Residential mortgage-backed securities — ​ 926,387 ​ — ​ 926,387 Corporate debt securities — ​ 124,724 ​ — ​ 124,724 Equity securities ​ — ​ 5,690 ​ — ​ 5,690 Loans held for sale ​ — ​ ​ 70,345 ​ ​ — ​ ​ 70,345 Derivative assets ​ — ​ ​ 17,825 ​ ​ — ​ ​ 17,825 Derivative liabilities ​ — ​ ​ 19,177 ​ ​ — ​ ​ 19,177 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total December 31, 2018 Inputs Inputs Inputs Fair Value Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities $ — ​ $ 25,411 ​ $ — ​ $ 25,411 Obligations of U.S. government corporations and agencies — ​ 52,342 ​ — ​ 52,342 Obligations of states and political subdivisions — ​ 170,044 ​ — ​ 170,044 Commercial mortgage-backed securities ​ — ​ ​ 1,942 ​ ​ — ​ ​ 1,942 Residential mortgage-backed securities — ​ 315,748 ​ — ​ 315,748 Corporate debt securities — ​ 132,198 ​ — ​ 132,198 Equity securities ​ 6,169 ​ ​ — ​ ​ — ​ ​ 6,169 Loans held for sale ​ — ​ ​ 25,895 ​ ​ — ​ ​ 25,895 Derivative assets ​ — ​ ​ 2,062 ​ ​ — ​ ​ 2,062 Derivative liabilities ​ — ​ ​ 2,643 ​ ​ — ​ ​ 2,643 ​ Certain financial assets and financial liabilities are measured at fair value on a non-recurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). ​ Impaired Loans . The Company does not record portfolio loans at fair value on a recurring basis. However, periodically, a loan is identified as impaired and is reported at the fair value of the underlying collateral, less estimated costs to sell, if repayment is expected solely from the collateral. Impaired loans measured at fair value typically consist of loans on non-accrual status and restructured loans in compliance with modified terms. Collateral values are estimated using a combination of observable inputs, including recent appraisals, and unobservable inputs based on customized discounting criteria. Due to the significance of the unobservable inputs, all impaired loan fair values have been classified as level 3. ​ OREO. Non-financial assets and non-financial liabilities measured at fair value include OREO (upon initial recognition or subsequent impairment). OREO properties are measured using a combination of observable inputs, including recent appraisals, and unobservable inputs. Due to the significance of the unobservable inputs, all OREO fair values have been classified as level 3. ​ Bank Property Held for Sale. Bank property held for sale represents certain banking center office buildings which the Company has closed and consolidated with other existing banking centers. Bank property held for sale is measured at the lower of amortized cost or fair value less estimated costs to sell. The fair values were based upon discounted appraisals or real estate listing price. Due to the significance of the unobservable inputs, all bank property held for sale fair values have been classified as level 3. ​ The following table summarizes assets and liabilities measured at fair value on a non-recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total ​ Inputs Inputs Inputs Fair Value September 30, 2019 ​ ​ Impaired loans ​ $ — ​ $ — ​ $ 6,917 ​ $ 6,917 OREO ​ — ​ — ​ 55 ​ 55 Bank property held for sale ​ — ​ — ​ 1,832 ​ 1,832 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ ​ ​ ​ Impaired loans ​ $ — ​ $ — ​ $ 10,999 ​ $ 10,999 OREO ​ — ​ — ​ 55 ​ 55 Bank property held for sale ​ ​ — ​ — ​ 1,832 ​ 1,832 ​ The following table presents additional quantitative information about assets measured at fair value on a non-recurring basis for which the Company has utilized level 3 inputs to determine fair value (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative Information about Level 3 Fair Value Measurements ​ Fair Value ​ Valuation ​ Unobservable ​ Range ​ Estimate Techniques Input (Weighted Average) September 30, 2019 ​ Impaired loans $ 6,917 Appraisal of collateral Appraisal adjustments - 5.6 % to - 100.0 % ​ ​ ​ ​ ​ ​ ​ ​ (-39.2)% OREO 55 Appraisal of collateral Appraisal adjustments - 25.0 % to - 100.0 % ​ ​ ​ ​ ​ ​ ​ ​ (-65.0)% Bank property held for sale ​ 1,832 ​ Appraisal of collateral or real estate listing price ​ Appraisal adjustments ​ - 0.0 % to - 35.1 % ​ ​ ​ ​ ​ ​ ​ ​ (-28.3)% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired loans $ 10,999 Appraisal of collateral Appraisal adjustments - 3.3 % to - 100.0 % ​ ​ ​ ​ ​ ​ ​ ​ (-24.1)% OREO 55 Appraisal of collateral Appraisal adjustments - 25.0 % to - 100.0 % ​ ​ ​ ​ ​ ​ ​ ​ (-65.0)% Bank property held for sale ​ 1,832 ​ Appraisal of collateral or real estate listing price ​ Appraisal adjustments ​ - 0.0 % to - 35.1 % ​ ​ ​ ​ ​ ​ ​ ​ (-28.3)% ​ The estimated fair values of financial instruments that are reported at amortized cost in the Company’s unaudited Consolidated Balance Sheets, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value, were as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ December 31, 2018 ​ Carrying Fair Carrying Fair ​ Amount Value Amount Value Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents $ 525,457 ​ $ 525,457 ​ $ 239,973 ​ $ 239,973 Level 2 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities held to maturity ​ 15,170 ​ ​ 15,399 ​ ​ 608,660 ​ ​ 603,360 Accrued interest receivable 29,408 ​ 29,408 ​ 22,314 ​ 22,314 Level 3 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Portfolio loans, net 6,616,450 ​ 6,630,255 ​ 5,517,780 ​ 5,473,063 Mortgage servicing rights ​ 9,276 ​ ​ 11,410 ​ ​ 3,315 ​ ​ 11,051 Other servicing rights ​ 1,039 ​ ​ 1,676 ​ ​ 781 ​ ​ 1,443 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 2 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Time deposits $ 1,652,971 ​ $ 1,654,955 ​ $ 1,497,003 ​ $ 1,482,301 Securities sold under agreements to repurchase 202,500 ​ 202,500 ​ 185,796 ​ 185,796 Short-term borrowings ​ 29,739 ​ ​ 29,835 ​ ​ — ​ ​ — Long-term debt 85,106 ​ 85,238 ​ ​ 50,000 ​ 49,873 Junior subordinated debt owed to unconsolidated trusts 71,269 ​ 73,292 ​ 71,155 ​ 65,182 Accrued interest payable 7,487 ​ 7,487 ​ 6,568 ​ 6,568 Level 3 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Senior notes, net of unamortized issuance costs ​ 39,640 ​ ​ 40,144 ​ ​ 39,539 ​ ​ 39,452 Subordinated notes, net of unamortized issuance costs ​ 59,222 ​ ​ 60,971 ​ ​ 59,147 ​ ​ 58,186 ​ A detailed description of the valuation methodologies used in estimating the fair value of financial instruments is set forth in the Company’s 2018 Form 10-K.

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases
Leases	​ ​ Note 16: Leases ​ The Company has operating leases consisting primarily of equipment leases and real estate leases. The Company leases real estate property for bank branches, ATM locations, and office space with terms extending through 2032. As of September 30, 2019, the Company reported $10.0 million of right-of-use asset and $10.1 million lease liability in its unaudited Consolidated Balance Sheets. ​ The following tables represents lease costs and other lease information for the periods presented (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended Lease Costs September 30, 2019 September 30, 2019 Operating lease costs $ 619 ​ $ 1,736 Variable lease costs 133 ​ 363 Short-term lease costs ​ 46 ​ ​ 69 Sublease income ​ - ​ ​ - Net lease cost $ 798 ​ $ 2,168 ​ ​ ​ ​ ​ ​ Other information ​ ​ ​ ​ ​ Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ ​ ​ Operating lease cash flows – Fixed payments $ 605 ​ $ 1,688 Operating lease cash flows – Liability reduction 526 ​ 1,479 Right of use assets obtained during the period in exchange for operating lease liabilities ​ 159 ​ ​ 923 Weighted average lease term (in years) ​ 6.73 ​ ​ 6.73 Weighted average discount rate ​ 3.04% ​ ​ 3.04% ​ At September 30, 2019, the Company was obligated under noncancelable operating leases for office space and other commitments. Rent expense under operating leases, included in net occupancy and equipment expense, was $0.8 million and $0.6 million for the three months ended September 30, 2019 and 2018, respectively. Rent expense under operating leases, included in net occupancy and equipment expense, was $2.2 million and $1.9 million for the nine months ended September 30, 2019 and 2018, respectively. ​ Rent commitments were as follows (dollars in thousands) : ​ ​ ​ ​ September 30, 2019 2019 $ 613 2020 2,386 2021 ​ 1,763 2022 ​ 1,375 2023 ​ 1,217 Thereafter ​ 3,895 Amounts representing interest ​ (1,148) Present value of net future minimum lease payments $ 10,101 ​

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Significant Accounting Policies
Use of Estimates	Use of Estimates ​ In preparing the accompanying unaudited consolidated financial statements in conformity with GAAP, the Company’s management is required to make estimates and assumptions that affect the amounts reported in the financial statements and the disclosures provided. Actual results could differ from those estimates. Material estimates which are particularly susceptible to significant change in the near term relate to the fair value of investment securities, fair value of assets acquired and liabilities assumed in business combinations, goodwill, income taxes and the determination of the allowance for loan losses.
Leases	Leases Effective January 1, 2019, a determination is made at inception if an arrangement contains a lease. For arrangements that contain a lease, the Company recognizes the lease on the balance sheet as a right of use asset and corresponding lease liability. Lease-related assets, or right of use assets, are recognized on the lease commencement date at amounts equal to the respective lease liabilities, adjusted for prepaid lease payments, initial direct costs, and lease incentives received. Lease-related liabilities are recognized at the present value of the remaining contractual fixed lease payments, discounted using our incremental borrowing rate. Operating lease expense is recognized on a straight-line basis over the lease term, while variable lease payments are expensed as incurred. Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. If not readily determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. For operating leases existing prior to January 1, 2019, the Company used a borrowing rate that corresponded to the remaining lease term. ​ The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the right-of-use asset and lease liability.
Impact of recently adopted accounting standards	Impact of recently adopted accounting standards On January 1, 2019, the Company adopted Accounting Standards Update (“ASU”) 2016-02 “Leases (Topic 842) and all subsequent ASUs that modified Topic 842. The Company made the following elections for all leases in connection with the adoption of this guidance: ● The Company elected the package of practical expedients to not reassess prior conclusions related to contracts containing leases, lease classification and initial direct costs; ● The Company did not elect the hindsight practical expedient ; ● The Company elected the optional transition method that allows companies to use the effective date as the date of initial application on transition. As a result, the Company did not adjust comparative period financial information or make the newly required lease disclosures for periods before the effective date; ● The Company elected not to apply the above guidance to short-term leases; ● The Company elected to separate the lease components from the nonlease components and exclude the nonlease components from the right-of-use asset and lease liability; and ● The Company did not elect the land easement practical expedient. ​ At the date of adoption, the Company recorded approximately $8.1 million on its Consolidated Balance Sheets to reflect the right of use asset and associated lease liability . The Company utilized its incremental borrowing rate, on a collateralized basis, for the remaining contractual lease term. ​ ASU 2017-08, "Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20), Premium Amortization on Purchased Callable Debt Securities." ASU 2017-08 shortens the amortization period for certain callable debt securities held at a premium, requiring the premium to be amortized to the earliest call date. ASU 2017-08 does not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. This guidance was effective for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. ​ ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities." ASU 2017-12 amends Topic 815 to reduce the cost and complexity of applying hedge accounting and expands the types of relationships that qualify for hedge accounting. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness, requires all items that affect earnings to be presented in the same income statement line as the hedged item, provides for applying hedge accounting to additional hedging strategies, provides for new approaches to measuring the hedged item in fair value hedges of interest rate risk, and eases the requirements for effective testing and hedge documentation. This guidance was effective for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years. During the first quarter of 2019, t he Company adopted this guidance, reassessed classification of certain investments, and transferred $573.6 million of securities from held to maturity to available for sale. ​ ASU 2018-07, "Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting." ASU 2018-07 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. This guidance was effective for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. Recently issued accounting standards ​ ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." ASU 2016-13 implements a change from the current impaired loss model to an expected credit loss model over the life of an instrument, including loans and securities held to maturity. The expected credit loss model is expected to result in earlier recognition of losses. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 including interim periods with those years. The Company is executing a project plan to implement this guidance. The project plan includes an assessment of data, development of methodologies, model validation, parallel runs, refining qualitative factors and forecast periods and evaluating related disclosures. The Company is currently assessing the impact of adopting ASU 2016-13, which will be significantly influenced by the composition, characteristics and quality of the loan portfolio as well as the prevailing economic conditions and forecasts as of the adoption date.

Acquisition (Tables)

Acquisition (Tables) - Banc Ed	9 Months Ended
	Sep. 30, 2019
Schedule of fair value estimates of assets acquired and liabilities assumed	The following table presents the estimated fair value of Banc Ed’s assets acquired and liabilities assumed as of January 31, 2019 (dollars in thousands) : ​ ​ ​ ​ ​ ​ Estimated ​ ​ Fair Value Assets acquired: ​ ​ Cash and cash equivalents ​ $ 42,013 Securities ​ 692,716 Loans held for sale ​ 2,157 Portfolio loans ​ 873,336 Premises and equipment ​ 31,804 Other intangible assets ​ ​ 32,617 Mortgage servicing rights ​ 6,946 Other assets ​ 57,296 Total assets acquired ​ 1,738,885 ​ ​ ​ ​ Liabilities assumed: ​ ​ ​ Deposits ​ 1,439,203 Other borrowings ​ 63,439 Other liabilities ​ 24,760 Total liabilities assumed ​ 1,527,402 ​ ​ ​ ​ Net assets acquired ​ $ 211,483 ​ ​ ​ ​ Consideration paid: ​ ​ ​ Cash ​ $ 91,400 Common stock ​ 166,515 Total consideration paid ​ $ 257,915 ​ ​ ​ ​ Goodwill ​ $ 46,432 ​
Schedule of unaudited pro forma results of operations for the acquisition	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pro Forma ​ ​ Three Months Ended September 30, ​ Nine Months Ended September 30, ​ ​ 2019 ​ ​ 2018 ​ ​ 2019 ​ 2018 Total revenues (net interest income plus non- interest income) $ 104,543 ​ $ 101,001 ​ $ 305,709 ​ $ 306,472 Net income ​ 30,811 ​ ​ 31,641 ​ 84,742 ​ ​ 87,972 Diluted earnings per common share ​ 0.55 ​ ​ 0.57 ​ 1.51 ​ ​ 1.60

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2019
Securities
Schedule of amortized cost, unrealized gains and losses and fair values of securities classified available for sale and held to maturity	The table below provides the amortized cost, unrealized gains and losses and fair values of debt securities summarized by major category (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair September 30, 2019: Cost Gains Losses Value Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 51,395 ​ $ 262 ​ $ (6) ​ $ 51,651 Obligations of U.S. government corporations and agencies ​ 202,393 ​ 3,273 ​ (53) ​ 205,613 Obligations of states and political subdivisions ​ 263,345 ​ 5,733 ​ (16) ​ 269,062 Commercial mortgage-backed securities ​ ​ 121,338 ​ ​ 2,248 ​ ​ (18) ​ ​ 123,568 Residential mortgage-backed securities ​ 914,320 ​ 12,674 ​ (607) ​ 926,387 Corporate debt securities ​ 123,061 ​ 1,668 ​ (5) ​ 124,724 Total ​ $ 1,675,852 ​ $ 25,858 ​ $ (705) ​ $ 1,701,005 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities held to maturity ​ ​ ​ ​ ​ ​ ​ ​ Obligations of states and political subdivisions ​ $ 15,170 ​ $ 229 ​ $ — ​ $ 15,399 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair December 31, 2018: Cost Gains Losses Value Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 25,824 ​ $ 1 ​ $ (414) ​ $ 25,411 Obligations of U.S. government corporations and agencies ​ 53,096 ​ 7 ​ (761) ​ 52,342 Obligations of states and political subdivisions ​ 171,131 ​ 484 ​ (1,571) ​ 170,044 Commercial mortgage-backed securities ​ ​ 2,003 ​ ​ — ​ ​ (61) ​ ​ 1,942 Residential mortgage-backed securities ​ 322,646 ​ 245 ​ (7,143) ​ 315,748 Corporate debt securities ​ 132,513 ​ 61 ​ (376) ​ 132,198 Total ​ $ 707,213 ​ $ 798 ​ $ (10,326) ​ $ 697,685 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities held to maturity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Obligations of states and political subdivisions ​ $ 33,947 ​ $ 68 ​ $ (87) ​ $ 33,928 Commercial mortgage-backed securities ​ ​ 59,054 ​ ​ 11 ​ ​ (1,003) ​ ​ 58,062 Residential mortgage-backed securities ​ ​ 515,659 ​ ​ 1,748 ​ ​ (6,037) ​ ​ 511,370 Total ​ $ 608,660 ​ $ 1,827 ​ $ (7,127) ​ $ 603,360
Schedule of amortized cost and fair value of debt securities available for sale and held to maturity by contractual maturity	​ The amortized cost and fair value of debt securities, by contractual maturity or pre-refunded date, are shown below. Mortgages underlying mortgage-backed securities may be called or prepaid; therefore, actual maturities could differ from the contractual maturities. All mortgage-backed securities were issued by U.S. government agencies and corporations (dollars in thousands) . ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities available for sale ​ Debt securities held to maturity ​ Amortized Fair Amortized Fair September 30, 2019: Cost Value Cost Value Due in one year or less ​ $ 128,897 ​ $ 129,230 ​ $ 2,215 ​ $ 2,218 Due after one year through five years ​ 407,251 ​ 413,491 ​ 11,834 ​ 12,006 Due after five years through ten years ​ 248,270 ​ 253,453 ​ 1,121 ​ 1,175 Due after ten years ​ 891,434 ​ 904,831 ​ — ​ — Total ​ $ 1,675,852 ​ $ 1,701,005 ​ $ 15,170 ​ $ 15,399
Schedule of realized gains and losses related to sales of securities	Realized gains and losses related to sales and calls of debt securities available for sale are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, ​ Nine Months Ended September 30, ​ 2019 2018 2019 2018 Gross security gains ​ $ 298 ​ $ — ​ $ 689 ​ $ — Gross security (losses) ​ ​ (1) ​ — ​ (585) ​ — Net (losses) gains on sales of securities (1) ​ $ 297 ​ $ — ​ $ 104 ​ $ — (1) Net (losses) gains on sales of securities reported on the unaudited Consolidated Statements of Income includes sale of equity securities, excluded in this table.
Schedule of securities with gross unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous loss position	The following information pertains to debt securities with gross unrealized losses, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For less than ​ For greater ​ ​ ​ ​ ​ ​ ​ 12 months, gross ​ than 12 months, gross ​ Total, gross ​ Fair Unrealized Fair Unrealized Fair Unrealized September 30, 2019: Value Losses Value Losses Value Losses Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities $ — ​ $ — ​ $ 9,982 ​ $ (6) ​ $ 9,982 ​ $ (6) Obligations of U.S. government corporations and agencies ​ 6,938 ​ ​ (45) ​ ​ 6,481 ​ ​ (8) ​ ​ 13,419 ​ ​ (53) Obligations of states and political subdivisions ​ 4,949 ​ ​ (11) ​ ​ 9,129 ​ ​ (5) ​ ​ 14,078 ​ ​ (16) Commercial mortgage-backed securities ​ 3,913 ​ ​ (11) ​ ​ 9,702 ​ ​ (7) ​ ​ 13,615 ​ ​ (18) Residential mortgage-backed securities 43,372 ​ (47) ​ 57,319 ​ (560) ​ 100,691 ​ (607) Corporate debt securities 485 ​ (2) ​ 5,595 ​ (3) ​ 6,080 ​ (5) Total temporarily impaired securities $ 59,657 ​ $ (116) ​ $ 98,208 ​ $ (589) ​ $ 157,865 ​ $ (705) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For less than ​ For greater ​ ​ ​ ​ ​ ​ ​ 12 months, gross ​ than 12 months, gross ​ Total, gross ​ Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2018: Value Losses Value Losses Value Losses Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities $ 995 ​ $ (4) ​ $ 24,343 ​ $ (410) ​ $ 25,338 ​ $ (414) Obligations of U.S. government corporations and agencies ​ 749 ​ ​ (3) ​ ​ 50,744 ​ ​ (758) ​ ​ 51,493 ​ ​ (761) Obligations of states and political subdivisions ​ 49,893 ​ ​ (460) ​ ​ 77,651 ​ ​ (1,111) ​ ​ 127,544 ​ ​ (1,571) Commercial mortgage-backed securities ​ — ​ ​ — ​ ​ 1,942 ​ ​ (61) ​ ​ 1,942 ​ ​ (61) Residential mortgage-backed securities 48,387 ​ (496) ​ 247,573 ​ (6,647) ​ 295,960 ​ (7,143) Corporate debt securities 90,713 ​ (268) ​ 15,083 ​ (108) ​ 105,796 ​ (376) Total temporarily impaired securities $ 190,737 ​ $ (1,231) ​ $ 417,336 ​ $ (9,095) ​ $ 608,073 ​ $ (10,326) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities held to maturity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Obligations of states and political subdivisions $ 9,531 ​ $ (33) ​ $ 9,538 ​ $ (54) ​ $ 19,069 ​ $ (87) Commercial mortgage-backed securities ​ 12,067 ​ ​ (212) ​ ​ 45,041 ​ ​ (791) ​ ​ 57,108 ​ ​ (1,003) Residential mortgage-backed securities ​ 77,071 ​ ​ (974) ​ ​ 245,128 ​ ​ (5,063) ​ ​ 322,199 ​ ​ (6,037) Total temporarily impaired securities $ 98,669 ​ $ (1,219) ​ $ 299,707 ​ $ (5,908) ​ $ 398,376 ​ $ (7,127)

Portfolio loans (Tables)

Portfolio loans (Tables)	9 Months Ended
	Sep. 30, 2019
Portfolio loans
Schedule of distribution of portfolio loans	The distribution of portfolio loans is as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ 2019 2018 Commercial ​ $ 1,680,491 ​ $ 1,405,106 Commercial real estate ​ ​ 2,793,380 ​ ​ 2,366,823 Real estate construction ​ ​ 426,559 ​ ​ 288,197 Retail real estate ​ ​ 1,717,555 ​ ​ 1,480,133 Retail other ​ ​ 51,430 ​ ​ 28,169 Portfolio loans ​ $ 6,669,415 ​ $ 5,568,428 ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses ​ ​ (52,965) ​ ​ (50,648) Portfolio loans, net ​ $ 6,616,450 ​ $ 5,517,780
Summary of risk grades segregated by category of portfolio loans (excluding accretable purchase accounting adjustments and clearings)	The following table is a summary of risk grades segregated by category of portfolio loans (excluding accretable purchase accounting adjustments and clearings) (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ ​ ​ Special ​ Substandard ​ Pass Watch Mention Substandard Non-accrual Commercial $ 1,393,420 ​ $ 167,439 ​ $ 63,516 ​ $ 47,765 ​ $ 10,708 Commercial real estate 2,474,248 ​ 189,443 ​ 91,689 ​ 38,018 ​ 11,852 Real estate construction 397,377 ​ 24,050 ​ 5,151 ​ 1,130 ​ 611 Retail real estate 1,670,187 ​ 14,231 ​ 7,565 ​ 7,963 ​ 8,591 Retail other 51,752 ​ 79 ​ — ​ 13 ​ 65 Total ​ $ 5,986,984 ​ $ 395,242 ​ $ 167,921 ​ $ 94,889 ​ $ 31,827 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ ​ ​ Special ​ Substandard ​ Pass Watch Mention Substandard Non-accrual Commercial $ 1,126,257 ​ $ 172,449 ​ $ 47,000 ​ $ 42,532 ​ $ 17,953 Commercial real estate 2,106,711 ​ 137,214 ​ 85,148 ​ 36,205 ​ 10,298 Real estate construction 268,069 ​ 14,562 ​ 3,899 ​ 1,888 ​ 18 Retail real estate 1,448,964 ​ 6,425 ​ 6,792 ​ 5,435 ​ 6,698 Retail other 26,707 ​ — ​ — ​ — ​ 30 Total ​ $ 4,976,708 ​ $ 330,650 ​ $ 142,839 ​ $ 86,060 ​ $ 34,997
Summary of portfolio loans that are past due and still accruing or on a non-accrual status	An analysis of portfolio loans that are past due and still accruing or on a non-accrual status is as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ ​ Loans past due, still accruing ​ Non-accrual ​ 30-59 Days 60-89 Days 90+Days Loans Commercial ​ $ 464 ​ $ 584 ​ $ 698 ​ $ 10,708 Commercial real estate ​ 474 ​ 3,040 ​ 222 ​ 11,852 Real estate construction ​ 229 ​ 198 ​ — ​ 611 Retail real estate ​ 4,119 ​ 3,252 ​ 354 ​ ​ 8,591 Retail other ​ 66 ​ 8 ​ 2 ​ 65 Total ​ $ 5,352 ​ $ 7,082 ​ $ 1,276 ​ $ 31,827 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ ​ Loans past due, still accruing ​ Non-accrual ​ 30-59 Days 60-89 Days 90+Days Loans Commercial ​ $ 158 ​ $ 140 ​ $ 775 ​ $ 17,953 Commercial real estate ​ 148 ​ 558 ​ — ​ 10,298 Real estate construction ​ 121 ​ — ​ 58 ​ 18 Retail real estate ​ 4,578 ​ 1,368 ​ 766 ​ 6,698 Retail other ​ 48 ​ 2 ​ 2 ​ 30 Total ​ $ 5,053 ​ $ 2,068 ​ $ 1,601 ​ $ 34,997
Summary of restructured loans	A summary of troubled debt restructurings (“TDR”) loans is as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, December 31, ​ ​ 2019 2018 In compliance with modified terms ​ $ 8,778 ​ $ 8,319 30 — 89 days past due ​ — ​ 127 Included in non-performing loans ​ 3,557 ​ 392 Total ​ $ 12,335 ​ $ 8,838
Schedule of details of impaired loans, segregated by category	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ Unpaid Recorded ​ ​ ​ ​ ​ ​ Contractual ​ Investment ​ Recorded ​ Total ​ ​ ​ ​ Average ​ ​ Principal ​ with No ​ Investment ​ Recorded ​ Related ​ Recorded ​ Balance Allowance with Allowance Investment Allowance Investment Commercial ​ $ 16,593 ​ $ 9,237 ​ $ 3,262 ​ $ 12,499 ​ $ 2,671 ​ $ 16,070 Commercial real estate ​ 19,011 ​ ​ 8,566 ​ ​ 8,823 ​ 17,389 ​ 2,497 ​ 18,104 Real estate construction ​ 1,071 ​ 929 ​ — ​ 929 ​ — ​ 759 Retail real estate ​ 14,869 ​ 13,141 ​ 474 ​ 13,615 ​ 474 ​ 13,569 Retail other ​ 98 ​ 67 ​ — ​ 67 ​ — ​ 37 Total ​ $ 51,642 ​ $ 31,940 ​ $ 12,559 ​ $ 44,499 ​ $ 5,642 ​ $ 48,539 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ Unpaid Recorded ​ ​ ​ ​ ​ ​ Contractual ​ Investment ​ Recorded ​ Total ​ ​ ​ ​ Average ​ ​ Principal ​ with No ​ Investment ​ Recorded ​ Related ​ Recorded ​ Balance Allowance with Allowance Investment Allowance Investment Commercial ​ $ 21,442 ​ $ 6,858 ​ $ 12,001 ​ $ 18,859 ​ $ 4,319 ​ $ 13,364 Commercial real estate ​ 19,079 ​ 13,082 ​ 4,498 ​ 17,580 ​ 1,181 ​ 18,077 Real estate construction ​ 478 ​ 453 ​ — ​ 453 ​ — ​ 712 Retail real estate ​ 14,418 ​ 13,196 ​ 61 ​ 13,257 ​ 61 ​ 14,110 Retail other ​ 117 ​ 33 ​ — ​ 33 ​ — ​ 40 Total ​ $ 55,534 ​ $ 33,622 ​ $ 16,560 ​ $ 50,182 ​ $ 5,561 ​ $ 46,303
Schedule of activity on the allowance for loan losses	​ The following table details activity in the allowance for loan losses. Allocation of a portion of the allowance to one category does not preclude its availability to absorb losses in other categories (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of and for the Three Months Ended September 30, 2019 ​ ​ Commercial Real Estate Retail Real ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Beginning balance ​ $ 16,733 ​ $ 20,188 ​ $ 3,305 ​ $ 10,613 ​ $ 536 ​ $ 51,375 Provision for loan losses ​ 463 ​ 3,167 ​ (359) ​ (86) ​ 226 ​ 3,411 Charged-off ​ (817) ​ (1,168) ​ — ​ ​ (226) ​ (288) ​ (2,499) Recoveries ​ 147 ​ 33 ​ 164 ​ 221 ​ 113 ​ 678 Ending balance ​ $ 16,526 ​ $ 22,220 ​ $ 3,110 ​ $ 10,522 ​ $ 587 ​ $ 52,965 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of and for the Nine Months Ended September 30, 2019 ​ ​ Commercial Real Estate Retail Real ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Beginning balance ​ $ 17,829 ​ $ 21,137 ​ $ 2,723 ​ $ 8,471 ​ $ 488 ​ $ 50,648 Provision for loan losses ​ 3,417 ​ 1,981 ​ 54 ​ 2,212 ​ 375 ​ 8,039 Charged-off ​ (5,187) ​ (1,183) ​ — ​ ​ (943) ​ (596) ​ (7,909) Recoveries ​ 467 ​ 285 ​ 333 ​ 782 ​ 320 ​ 2,187 Ending balance ​ $ 16,526 ​ $ 22,220 ​ $ 3,110 ​ $ 10,522 ​ $ 587 ​ $ 52,965 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of and for the Three Months Ended September 30, 2018 ​ ​ ​ ​ ​ Commercial ​ Real Estate ​ Retail Real ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Beginning balance $ 17,586 ​ $ 23,047 ​ $ 2,915 ​ $ 9,293 ​ $ 464 ​ $ 53,305 Provision for loan losses ​ 2,388 ​ (1,291) ​ (15) ​ (399) ​ 75 ​ 758 Charged-off ​ (1,144) ​ (62) ​ — ​ (695) ​ (286) ​ (2,187) Recoveries ​ 136 ​ 58 ​ 32 ​ 423 ​ 218 ​ 867 Ending balance $ 18,966 ​ $ 21,752 ​ $ 2,932 ​ $ 8,622 ​ $ 471 ​ $ 52,743 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of and for the Nine Months Ended September 30, 2018 ​ ​ ​ ​ ​ Commercial ​ Real Estate ​ Retail Real ​ ​ ​ ​ ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Beginning balance $ 14,779 ​ $ 21,813 ​ $ 2,861 ​ $ 13,783 ​ $ 346 ​ $ 53,582 Provision for loan losses ​ 7,111 ​ 1,154 ​ 22 ​ (4,609) ​ 346 ​ 4,024 Charged-off ​ (3,841) ​ (1,487) ​ (97) ​ (1,637) ​ (608) ​ (7,670) Recoveries ​ 917 ​ 272 ​ 146 ​ 1,085 ​ 387 ​ 2,807 Ending balance $ 18,966 $ 21,752 $ 2,932 $ 8,622 $ 471 $ 52,743
Schedule of allowance for loan losses and recorded investments in portfolio loans, by category	The following table presents the allowance for loan losses and recorded investments in portfolio loans by category (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of September 30, 2019 ​ ​ ​ Commercial Real Estate Retail Real ​ ​ ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Allowance for loan losses ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance attributed to: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans individually evaluated for impairment ​ $ 2,671 ​ $ 2,497 ​ $ — ​ $ 474 ​ $ — ​ $ 5,642 Loans collectively evaluated for impairment ​ 13,855 ​ 19,723 ​ 3,110 ​ 10,048 ​ 587 ​ 47,323 Ending balance ​ $ 16,526 ​ $ 22,220 ​ $ 3,110 ​ $ 10,522 ​ $ 587 ​ $ 52,965 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans individually evaluated for impairment ​ $ 12,481 ​ $ 14,954 ​ $ 494 ​ $ 12,693 ​ $ 67 ​ $ 40,689 Loans collectively evaluated for impairment ​ 1,667,992 ​ 2,775,991 ​ 425,630 ​ 1,703,940 ​ 51,363 ​ 6,624,916 PCI loans evaluated for impairment ​ ​ 18 ​ ​ 2,435 ​ ​ 435 ​ ​ 922 ​ ​ — ​ ​ 3,810 Ending balance ​ $ 1,680,491 ​ $ 2,793,380 ​ $ 426,559 ​ $ 1,717,555 ​ $ 51,430 ​ $ 6,669,415 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2018 ​ ​ ​ Commercial Real Estate Retail Real ​ ​ ​ ​ ​ Commercial Real Estate Construction Estate Retail Other Total Allowance for loan losses ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance attributed to: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans individually evaluated for impairment ​ $ 4,319 ​ $ 1,181 ​ $ — ​ $ 61 ​ $ — ​ $ 5,561 Loans collectively evaluated for impairment ​ 13,510 ​ 19,956 ​ 2,723 ​ 8,410 ​ 488 ​ 45,087 Ending balance ​ $ 17,829 ​ $ 21,137 ​ $ 2,723 ​ $ 8,471 ​ $ 488 ​ $ 50,648 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans individually evaluated for impairment ​ $ 18,441 ​ $ 15,318 ​ $ 453 ​ $ 13,159 ​ $ 33 ​ $ 47,404 Loans collectively evaluated for impairment ​ 1,386,247 ​ 2,349,243 ​ 287,744 ​ 1,466,876 ​ 28,136 ​ 5,518,246 PCI loans evaluated for impairment ​ ​ 418 ​ ​ 2,262 ​ ​ — ​ ​ 98 ​ ​ — ​ ​ 2,778 Ending balance ​ $ 1,405,106 ​ $ 2,366,823 ​ $ 288,197 ​ $ 1,480,133 ​ $ 28,169 ​ $ 5,568,428

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2019
Deposits
Schedule of composition of deposits	The composition of deposits is as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ December 31, 2018 Demand deposits, noninterest-bearing ​ $ 1,779,490 ​ $ 1,464,700 Interest-bearing transaction deposits ​ 2,039,095 ​ 1,435,574 Saving deposits and money market deposits ​ 2,458,910 ​ ​ 1,852,044 Time deposits ​ 1,652,971 ​ 1,497,003 Total ​ $ 7,930,466 ​ $ 6,249,321
Schedule of maturities of time deposits	As of September 30, 2019, the scheduled maturities of time deposits are as follows (dollars in thousands) : ​ ​ ​ ​ ​ October 1, 2019 – September 30, 2020 ​ $ 468,221 October 1, 2020 – September 30, 2021 ​ ​ 167,271 October 1, 2021 – September 30, 2022 ​ 80,492 October 1, 2022 – September 30, 2023 ​ 55,019 October 1, 2023 – September 30, 2024 ​ 881,935 Thereafter ​ 33 ​ $ 1,652,971

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2019
Borrowings
Summary of long-term debt	Long-term debt is summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, ​ December 31, ​ 2019 2018 Notes payable, FHLB, ranging in original maturity from seven to 10 years , collateralized by FHLB deposits, residential and commercial real estate loans and FHLB stock. ​ $ 35,606 ​ $ 50,000 Notes payable ​ ​ 49,500 ​ ​ — Total long-term borrowings ​ $ 85,106 ​ $ 50,000

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Common Share
Schedule of computation of earnings per common share	Earnings per common share have been computed as follows (in thousands, except per share data) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended ​ ​ ​ September 30, ​ September 30, ​ ​ 2019 2018 2019 2018 ​ Net income ​ $ 24,828 ​ $ 26,859 ​ $ 74,382 ​ $ 73,638 ​ Shares: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average common shares outstanding ​ 55,410 ​ 48,892 ​ 54,783 ​ 48,828 ​ Dilutive effect of outstanding options, warrants and restricted stock units as determined by the application of the treasury stock method ​ 236 ​ 355 ​ 275 ​ 388 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average common shares outstanding, as adjusted for diluted earnings per share calculation ​ 55,646 ​ 49,247 ​ 55,058 ​ 49,216 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic earnings per common share ​ $ 0.45 ​ $ 0.55 ​ $ 1.36 ​ $ 1.51 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted earnings per common share ​ $ 0.45 ​ $ 0.55 ​ $ 1.35 ​ $ 1.50 ​

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table represents changes in accumulated other comprehensive income (loss) by component, net of tax, for the periods below (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ ​ September 30, ​ ​ 2019 ​ ​ 2018 ​ ​ ​ Before Tax ​ Tax Effect ​ Net of Tax ​ ​ Before Tax ​ Tax Effect ​ Net of Tax Unrealized gains (losses) on debt securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at beginning of period ​ $ 20,459 $ (5,832) $ 14,627 ​ $ (15,197) $ 4,332 $ (10,865) Unrealized holding gains (losses) on debt securities available for sale, net ​ ​ 4,991 ​ (1,423) ​ 3,568 ​ ​ (3,019) ​ 860 ​ (2,159) Unrealized gains on debt securities transferred from held to maturity to available for sale ​ ​ — ​ — ​ — ​ ​ — ​ — ​ — Amounts reclassified from accumulated other comprehensive income, net ​ ​ (297) ​ 85 ​ (212) ​ ​ — ​ — ​ — Tax Cuts and Jobs Act of 2017 reclassification ​ ​ — ​ — ​ — ​ ​ — ​ — ​ — Balance at end of period ​ $ 25,153 $ (7,170) $ 17,983 ​ $ (18,216) $ 5,192 $ (13,024) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized gains (losses) on cash flow hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at beginning of period ​ ​ — ​ — ​ — ​ ​ — ​ — ​ — Unrealized holding gains (losses) on cash flow hedges, net ​ ​ (837) ​ 239 ​ (598) ​ ​ — ​ — ​ — Amounts reclassified from accumulated other comprehensive income, net ​ ​ 9 ​ (3) ​ 6 ​ ​ — ​ — ​ — Balance at end of period ​ $ (828) $ 236 $ (592) ​ $ — $ — $ — Total accumulated other comprehensive income (loss) ​ $ 24,325 $ (6,934) $ 17,391 ​ $ (18,216) $ 5,192 $ (13,024) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine Months Ended ​ ​ ​ September 30, ​ ​ 2019 ​ ​ 2018 ​ ​ ​ Before Tax ​ Tax Effect ​ Net of Tax ​ ​ Before Tax ​ Tax Effect ​ Net of Tax Unrealized gains (losses) on debt securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at beginning of period ​ $ (9,528) ​ 2,716 ​ (6,812) ​ $ (4,777) ​ 1,967 ​ (2,810) Unrealized holding gains (losses) on debt securities available for sale, net ​ ​ 30,005 ​ (8,552) ​ 21,453 ​ ​ (13,439) ​ 3,830 ​ (9,609) Unrealized gains on debt securities transferred from held to maturity to available for sale ​ ​ 4,780 ​ (1,363) ​ 3,417 ​ ​ — ​ — ​ — Amounts reclassified from accumulated other comprehensive income, net ​ ​ (104) ​ 29 ​ (75) ​ ​ — ​ — ​ — Tax Cuts and Jobs Act of 2017 reclassification ​ ​ — ​ — ​ — ​ ​ — ​ (605) ​ (605) Balance at end of period ​ $ 25,153 ​ (7,170) ​ 17,983 ​ $ (18,216) ​ 5,192 ​ (13,024) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized gains (losses) on cash flow hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at beginning of period ​ ​ — ​ — ​ — ​ ​ — ​ — ​ — Unrealized holding gains (losses) on cash flow hedges, net ​ ​ (837) ​ 239 ​ (598) ​ ​ — ​ — ​ — Amounts reclassified from accumulated other comprehensive income, net ​ ​ 9 ​ (3) ​ 6 ​ ​ — ​ — ​ — Balance at end of period ​ $ (828) ​ 236 ​ (592) ​ $ — ​ — ​ — Total accumulated other comprehensive income (loss) ​ $ 24,325 ​ (6,934) ​ 17,391 ​ $ (18,216) ​ 5,192 ​ (13,024)

Share-based Compensation (Table

Share-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Compensation
Schedule of status of and changes in the Company's stock option awards	A summary of the status of and changes in the Company's stock option awards for the nine months ended September 30, 2019 follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted- ​ Weighted- ​ ​ ​ ​ Average ​ Average ​ ​ ​ ​ Exercise ​ Remaining Contractual ​ Shares Price Term Outstanding at beginning of period 87,600 $ 20.58 ​ ​ Exercised (23,561) ​ 17.69 ​ ​ Forfeited (3,003) ​ 23.53 ​ ​ Expired (5,767) ​ 17.38 ​ ​ Outstanding at end of period 55,269 $ 21.99 6.11 Exercisable at end of period 39,825 $ 21.39 5.71
Summary of the changes in the Company's stock unit awards	A summary of the changes in the Company’s stock unit awards for the nine months ended September 30, 2019, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted- ​ Director ​ Weighted- ​ ​ Restricted ​ Average ​ Deferred ​ Average ​ ​ Stock ​ Grant Date ​ Stock ​ Grant Date ​ Units Fair Value Units Fair Value Non-vested at beginning of period 690,495 $ 26.14 20,449 $ 27.93 Granted 216,411 ​ 26.73 20,984 ​ 26.78 Dividend equivalents earned 17,559 ​ 26.07 1,961 ​ 26.07 Vested (104,760) ​ 18.40 (20,723) ​ 31.18 Forfeited (4,712) ​ 30.47 (1,523) ​ 31.62 Non-vested at end of period 814,993 $ 27.26 21,148 $ 23.17 Outstanding at end of period 814,993 $ 27.26 89,831 $ 23.36

Outstanding Commitments and C_2

Outstanding Commitments and Contingent Liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Outstanding Commitments and Contingent Liabilities
Schedule of contractual amount of exposure to off-balance-sheet risk	A summary of the contractual amount of the Company’s exposure to off-balance-sheet risk relating to the Company’s commitments to extend credit and standby letters of credit follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 December 31, 2018 Financial instruments whose contract amounts represent credit risk: ​ ​ ​ ​ ​ ​ Commitments to extend credit ​ $ 1,664,799 ​ $ 1,398,483 Standby letters of credit ​ 40,073 ​ 32,156

Regulatory Capital (Tables)

Regulatory Capital (Tables)	9 Months Ended
	Sep. 30, 2019
Regulatory Capital
Schedule of applicable holding company and bank regulatory capital requirements	The following tables summarize the applicable holding company and bank regulatory capital requirements (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ To Be Well ​ Actual ​ ​ Capital Requirement ​ ​ Capitalized ​ Amount Ratio ​ Amount Ratio ​ Amount Ratio As of September 30, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 1,020,195 13.71 % ​ $ 595,295 8.00 % ​ $ 744,118 10.00 % Busey Bank $ 883,146 13.93 % ​ $ 507,070 8.00 % ​ $ 633,837 10.00 % TheBANK $ 198,244 18.08 % ​ $ 87,743 8.00 % ​ $ 109,678 10.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 907,230 12.19 % ​ $ 446,471 6.00 % ​ $ 595,295 8.00 % Busey Bank $ 830,995 13.11 % ​ $ 380,303 6.00 % ​ $ 507,070 8.00 % TheBANK $ 197,430 18.00 % ​ $ 65,807 6.00 % ​ $ 87,743 8.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common Equity Tier 1 Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 833,230 11.20 % ​ $ 334,854 4.50 % ​ $ 483,677 6.50 % Busey Bank $ 830,995 13.11 % ​ $ 285,227 4.50 % ​ $ 411,994 6.50 % TheBANK $ 197,430 18.00 % ​ $ 49,356 4.50 % ​ $ 71,291 6.50 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital (to Average Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 907,230 9.78 % ​ $ 371,129 4.00 % ​ N/A N/A ​ Busey Bank $ 830,995 11.12 % ​ $ 298,943 4.00 % ​ $ 373,679 5.00 % TheBANK $ 197,430 10.55 % ​ $ 74,851 4.00 % ​ $ 93,563 5.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ To Be Well ​ ​ Actual ​ ​ Capital Requirement ​ ​ Capitalized ​ ​ Amount Ratio ​ Amount Ratio ​ Amount Ratio ​ As of December 31, 2018: ​ ​ Total Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 894,572 14.83 % ​ $ 482,638 8.00 % ​ $ 603,297 10.00 % Busey Bank $ 854,351 14.19 % ​ $ 481,701 8.00 % ​ $ 602,126 10.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 783,924 12.99 % ​ $ 361,978 6.00 % ​ $ 482,638 8.00 % Busey Bank $ 803,703 13.35 % ​ $ 361,276 6.00 % ​ $ 481,701 8.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common Equity Tier 1 Capital (to Risk Weighted Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 709,924 11.77 % ​ $ 271,484 4.50 % ​ $ 392,143 6.50 % Busey Bank $ 803,703 13.35 % ​ $ 270,957 4.50 % ​ $ 391,382 6.50 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital (to Average Assets) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated $ 783,924 10.36 % ​ $ 302,704 4.00 % ​ N/A N/A ​ Busey Bank $ 803,703 10.64 % ​ $ 302,232 4.00 % ​ $ 377,789 5.00 %

Operating Segments and Relate_2

Operating Segments and Related Information (Tables)	9 Months Ended
	Sep. 30, 2019
Operating Segments and Related Information
Summary of information relating to operating segments	Following is a summary of selected financial information for the Company’s operating segments (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Goodwill ​ Total Assets ​ September 30, 2019 December 31, 2018 September 30, 2019 December 31, 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 293,431 ​ $ 246,999 ​ $ 9,704,121 ​ $ 7,656,709 Remittance Processing ​ 8,992 ​ 8,992 ​ 43,138 ​ 39,278 Wealth Management ​ 20,276 ​ 11,694 ​ 28,587 ​ 20,992 Other ​ — ​ — ​ (22,086) ​ (14,622) Totals ​ $ 322,699 ​ $ 267,685 ​ $ 9,753,760 ​ $ 7,702,357 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, ​ Nine Months Ended September 30, ​ ​ 2019 2018 2019 2018 Net interest income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 75,955 ​ $ 62,578 ​ $ 222,537 ​ $ 186,103 ​ Remittance Processing ​ ​ 20 ​ ​ 17 ​ ​ 56 ​ ​ 49 ​ Wealth Management ​ — ​ 110 ​ — ​ 304 ​ Other ​ (2,499) ​ (1,931) ​ (7,306) ​ (5,553) ​ Total net interest income ​ $ 73,476 ​ $ 60,774 ​ $ 215,287 ​ $ 180,903 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-interest income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 18,301 ​ $ 11,196 ​ $ 46,743 ​ $ 33,827 ​ Remittance Processing ​ 4,088 ​ 4,042 ​ 12,386 ​ 11,812 ​ Wealth Management ​ 8,994 ​ 7,391 ​ 27,721 ​ 23,840 ​ Other ​ (447) ​ (776) ​ (2,073) ​ (2,338) ​ Total non-interest income ​ $ 30,936 ​ $ 21,853 ​ $ 84,777 ​ $ 67,141 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-interest expense: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 56,593 ​ $ 37,034 ​ $ 158,659 ​ $ 116,275 ​ Remittance Processing ​ ​ 2,746 ​ ​ 2,718 ​ ​ 8,099 ​ ​ 7,808 ​ Wealth Management ​ ​ 6,043 ​ ​ 4,307 ​ ​ 17,356 ​ ​ 13,921 ​ Other ​ ​ 2,739 ​ ​ 1,870 ​ ​ 9,190 ​ ​ 6,270 ​ Total non-interest expense ​ $ 68,121 ​ $ 45,929 ​ $ 193,304 ​ $ 144,274 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Income before income taxes: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 34,252 ​ $ 35,982 ​ $ 102,582 ​ $ 99,631 ​ Remittance Processing ​ ​ 1,362 ​ ​ 1,341 ​ ​ 4,343 ​ ​ 4,053 ​ Wealth Management ​ ​ 2,951 ​ ​ 3,194 ​ ​ 10,365 ​ ​ 10,223 ​ Other ​ ​ (5,685) ​ ​ (4,577) ​ ​ (18,569) ​ ​ (14,161) ​ Total income before income taxes ​ $ 32,880 ​ $ 35,940 ​ $ 98,721 ​ $ 99,746 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Banking ​ $ 25,731 ​ $ 26,486 ​ $ 76,837 ​ $ 73,235 ​ Remittance Processing ​ 972 ​ 957 ​ 3,102 ​ 2,896 ​ Wealth Management ​ 2,184 ​ 2,280 ​ 7,670 ​ 7,332 ​ Other ​ (4,059) ​ (2,864) ​ (13,227) ​ (9,825) ​ Total net income ​ $ 24,828 ​ $ 26,859 ​ $ 74,382 ​ $ 73,638 ​

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Summary of the interest-rate swaps designated as cash flow hedges	A summary of the interest-rate swaps designated as cash flow hedges is presented below (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ December 31, 2018 ​ ​ Notional amount ​ $ 70,000 ​ ​ $ — ​ ​ Weighted average fixed pay rates ​ 1.80 % ​ — % ​ Weighted average receive rates ​ ​ 2.12 % ​ ​ — % ​ Weighted average maturity ​ ​ 4.11 yrs ​ ​ — yrs ​ Unrealized gains (losses) ​ $ 592 ​ ​ $ — ​ ​
Interest rate lock commitments and forward sales commitments
Summary of fair values of derivative assets and liabilities recorded in consolidated balance sheet	The fair values of derivative assets and liabilities related to interest rate lock commitments and forward sales commitments recorded in the unaudited Consolidated Balance Sheets are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 December 31, 2018 Fair value recorded in other assets ​ $ 1,182 ​ $ 624 Fair value recorded in other liabilities ​ 1,707 ​ ​ 1,205
Summary of gross gains and losses on derivative assets and liabilities recorded in non-interest income and expense in consolidated statements of income	The gross gains and losses on these derivative assets and liabilities related to interest rate lock commitments and forward sales commitments recorded in non-interest income and expense in the unaudited Consolidated Statements of Income are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, Nine Months Ended September 30, ​ ​ 2019 2018 2019 2018 ​ Gross gains ​ $ 1,655 ​ $ 641 ​ $ 4,662 ​ $ 2,396 ​ Gross (losses) ​ (1,706) ​ ​ (561) ​ (4,773) ​ ​ (2,669) ​ Net gains (losses) ​ $ (51) ​ $ 80 ​ $ (111) ​ $ (273) ​
Interest rate swap
Summary of fair values of derivative assets and liabilities recorded in consolidated balance sheet	The fair values of derivative assets and liabilities related to derivatives for customers for interest rate swaps recorded in the unaudited Consolidated Balance Sheets are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ December 31, 2018 Fair value recorded in other assets ​ $ 16,643 ​ $ 1,438 Fair value recorded in other liabilities ​ ​ 16,643 ​ ​ 1,438
Summary of gross gains and losses on derivative assets and liabilities recorded in non-interest income and expense in consolidated statements of income	The gross gains and losses on these derivative assets and liabilities recorded in non-interest income and non-interest expense in the unaudited Consolidated Statements of Income are summarized as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, ​ Nine Months Ended September 30, ​ ​ 2019 ​ 2018 ​ 2019 ​ 2018 Gross gains ​ $ 4,695 ​ $ 724 ​ $ 15,205 ​ $ 2,167 Gross losses ​ ​ (4,695) ​ ​ (724) ​ ​ (15,205) ​ ​ (2,167) Net gains (losses) ​ $ — ​ $ — ​ $ — ​ $ —
Interest rate contract
Summary of gross gains and losses on derivative assets and liabilities recorded in non-interest income and expense in consolidated statements of income	The following table presents the net gains (losses) recorded in accumulated other comprehensive income and the unaudited Consolidated Statements of Income relating to cash flow derivative instruments for the periods presented (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, 2019 ​ ​ ​ ​ Amount of (gain) loss recognized in OCI (effective portion) ​ ​ ​ Amount of (gain) loss reclassified from OCI to interest income ​ ​ Amount of (gain) loss recognized in other non-interest income (ineffective portion) ​ Interest rate contracts ​ $ (598) ​ ​ $ (6) ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nine Months Ended September 30, 2019 ​ ​ ​ ​ Amount of (gain) loss recognized in OCI (effective portion) ​ ​ ​ Amount of (gain) loss reclassified from OCI to interest income ​ ​ Amount of (gain) loss recognized in other non-interest income (ineffective portion) ​ Interest rate contracts ​ $ (598) ​ ​ $ (6) ​ $ — ​

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Measurements
Schedule of financial assets and financial liabilities measured at fair value on a recurring basis	​ The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total September 30, 2019 Inputs Inputs Inputs Fair Value Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities $ — ​ $ 51,651 ​ $ — ​ $ 51,651 Obligations of U.S. government corporations and agencies — ​ 205,613 ​ — ​ 205,613 Obligations of states and political subdivisions — ​ 269,062 ​ — ​ 269,062 Commercial mortgage-backed securities ​ — ​ ​ 123,568 ​ ​ — ​ ​ 123,568 Residential mortgage-backed securities — ​ 926,387 ​ — ​ 926,387 Corporate debt securities — ​ 124,724 ​ — ​ 124,724 Equity securities ​ — ​ 5,690 ​ — ​ 5,690 Loans held for sale ​ — ​ ​ 70,345 ​ ​ — ​ ​ 70,345 Derivative assets ​ — ​ ​ 17,825 ​ ​ — ​ ​ 17,825 Derivative liabilities ​ — ​ ​ 19,177 ​ ​ — ​ ​ 19,177 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total December 31, 2018 Inputs Inputs Inputs Fair Value Debt securities available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities $ — ​ $ 25,411 ​ $ — ​ $ 25,411 Obligations of U.S. government corporations and agencies — ​ 52,342 ​ — ​ 52,342 Obligations of states and political subdivisions — ​ 170,044 ​ — ​ 170,044 Commercial mortgage-backed securities ​ — ​ ​ 1,942 ​ ​ — ​ ​ 1,942 Residential mortgage-backed securities — ​ 315,748 ​ — ​ 315,748 Corporate debt securities — ​ 132,198 ​ — ​ 132,198 Equity securities ​ 6,169 ​ ​ — ​ ​ — ​ ​ 6,169 Loans held for sale ​ — ​ ​ 25,895 ​ ​ — ​ ​ 25,895 Derivative assets ​ — ​ ​ 2,062 ​ ​ — ​ ​ 2,062 Derivative liabilities ​ — ​ ​ 2,643 ​ ​ — ​ ​ 2,643
Schedule of assets and liabilities measured at fair value on a non-recurring basis	The following table summarizes assets and liabilities measured at fair value on a non-recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 Total ​ Inputs Inputs Inputs Fair Value September 30, 2019 ​ ​ Impaired loans ​ $ — ​ $ — ​ $ 6,917 ​ $ 6,917 OREO ​ — ​ — ​ 55 ​ 55 Bank property held for sale ​ — ​ — ​ 1,832 ​ 1,832 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ ​ ​ ​ Impaired loans ​ $ — ​ $ — ​ $ 10,999 ​ $ 10,999 OREO ​ — ​ — ​ 55 ​ 55 Bank property held for sale ​ ​ — ​ — ​ 1,832 ​ 1,832
Schedule of quantitative information about Level 3 fair value measurements	The following table presents additional quantitative information about assets measured at fair value on a non-recurring basis for which the Company has utilized level 3 inputs to determine fair value (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative Information about Level 3 Fair Value Measurements ​ Fair Value ​ Valuation ​ Unobservable ​ Range ​ Estimate Techniques Input (Weighted Average) September 30, 2019 ​ Impaired loans $ 6,917 Appraisal of collateral Appraisal adjustments - 5.6 % to - 100.0 % ​ ​ ​ ​ ​ ​ ​ ​ (-39.2)% OREO 55 Appraisal of collateral Appraisal adjustments - 25.0 % to - 100.0 % ​ ​ ​ ​ ​ ​ ​ ​ (-65.0)% Bank property held for sale ​ 1,832 ​ Appraisal of collateral or real estate listing price ​ Appraisal adjustments ​ - 0.0 % to - 35.1 % ​ ​ ​ ​ ​ ​ ​ ​ (-28.3)% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired loans $ 10,999 Appraisal of collateral Appraisal adjustments - 3.3 % to - 100.0 % ​ ​ ​ ​ ​ ​ ​ ​ (-24.1)% OREO 55 Appraisal of collateral Appraisal adjustments - 25.0 % to - 100.0 % ​ ​ ​ ​ ​ ​ ​ ​ (-65.0)% Bank property held for sale ​ 1,832 ​ Appraisal of collateral or real estate listing price ​ Appraisal adjustments ​ - 0.0 % to - 35.1 % ​ ​ ​ ​ ​ ​ ​ ​ (-28.3)%
Schedule of estimated fair values of financial instruments	The estimated fair values of financial instruments that are reported at amortized cost in the Company’s unaudited Consolidated Balance Sheets, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value, were as follows (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2019 ​ December 31, 2018 ​ Carrying Fair Carrying Fair ​ Amount Value Amount Value Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents $ 525,457 ​ $ 525,457 ​ $ 239,973 ​ $ 239,973 Level 2 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Debt securities held to maturity ​ 15,170 ​ ​ 15,399 ​ ​ 608,660 ​ ​ 603,360 Accrued interest receivable 29,408 ​ 29,408 ​ 22,314 ​ 22,314 Level 3 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Portfolio loans, net 6,616,450 ​ 6,630,255 ​ 5,517,780 ​ 5,473,063 Mortgage servicing rights ​ 9,276 ​ ​ 11,410 ​ ​ 3,315 ​ ​ 11,051 Other servicing rights ​ 1,039 ​ ​ 1,676 ​ ​ 781 ​ ​ 1,443 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 2 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Time deposits $ 1,652,971 ​ $ 1,654,955 ​ $ 1,497,003 ​ $ 1,482,301 Securities sold under agreements to repurchase 202,500 ​ 202,500 ​ 185,796 ​ 185,796 Short-term borrowings ​ 29,739 ​ ​ 29,835 ​ ​ — ​ ​ — Long-term debt 85,106 ​ 85,238 ​ ​ 50,000 ​ 49,873 Junior subordinated debt owed to unconsolidated trusts 71,269 ​ 73,292 ​ 71,155 ​ 65,182 Accrued interest payable 7,487 ​ 7,487 ​ 6,568 ​ 6,568 Level 3 inputs: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Senior notes, net of unamortized issuance costs ​ 39,640 ​ ​ 40,144 ​ ​ 39,539 ​ ​ 39,452 Subordinated notes, net of unamortized issuance costs ​ 59,222 ​ ​ 60,971 ​ ​ 59,147 ​ ​ 58,186

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases
Schedule of lease costs and other lease information	​ The following tables represents lease costs and other lease information for the periods presented (dollars in thousands) : ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Nine Months Ended Lease Costs September 30, 2019 September 30, 2019 Operating lease costs $ 619 ​ $ 1,736 Variable lease costs 133 ​ 363 Short-term lease costs ​ 46 ​ ​ 69 Sublease income ​ - ​ ​ - Net lease cost $ 798 ​ $ 2,168 ​ ​ ​ ​ ​ ​ Other information ​ ​ ​ ​ ​ Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ ​ ​ Operating lease cash flows – Fixed payments $ 605 ​ $ 1,688 Operating lease cash flows – Liability reduction 526 ​ 1,479 Right of use assets obtained during the period in exchange for operating lease liabilities ​ 159 ​ ​ 923 Weighted average lease term (in years) ​ 6.73 ​ ​ 6.73 Weighted average discount rate ​ 3.04% ​ ​ 3.04% ​
Schedule of future rent commitments	Rent commitments were as follows (dollars in thousands) : ​ ​ ​ ​ September 30, 2019 2019 $ 613 2020 2,386 2021 ​ 1,763 2022 ​ 1,375 2023 ​ 1,217 Thereafter ​ 3,895 Amounts representing interest ​ (1,148) Present value of net future minimum lease payments $ 10,101

Significant Accounting Polici_3

Significant Accounting Policies - Impact of new financial accounting standards (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2019	Sep. 30, 2019	Jan. 01, 2019
Recently Issued Accounting Standards
Lease, Practical Expedients, Package [true false]		true
Lease, Practical Expedient, Use of Hindsight [true false]		false
Right of use asset		$ 9,979
Lease liability		$ 10,101
Accounting Standards Update 2017-12
Recently Issued Accounting Standards
Transferred securities from held to maturity to available-for-sale	$ 573,600
Accounting Standards Update 2016-02 | Restatement
Recently Issued Accounting Standards
Right of use asset			$ 8,100
Lease liability			$ 8,100

Acquisition (Details)

Acquisition (Details) $ / shares in Units, $ in Thousands, shares in Millions	Aug. 21, 2019$ / shares	Jan. 31, 2019USD ($)$ / sharesshares	Sep. 30, 2019USD ($)$ / shares	Sep. 30, 2018USD ($)$ / shares	Sep. 30, 2019USD ($)$ / shares	Sep. 30, 2018USD ($)$ / shares	Dec. 31, 2018USD ($)
Merger agreement
Decrease to other liabilities					$ (3,603)	$ (5,366)
Consideration paid
Goodwill			$ 322,699		322,699		$ 267,685
Banc Ed
Merger agreement
Share consideration conversion ratio	8.2067
Per share cash consideration entitled (in dollars per share) | $ / shares	$ 111.53
Number of common shares issued for acquisition | shares		6.7
Market value of common stock issued		$ 166,500
Common stock		$ 166,515
Share price | $ / shares		$ 24.76
Decrease to premises and equipment			(100)
Decrease to other liabilities			(300)
Decrease to goodwill			(200)
Assets acquired:
Cash and cash equivalents		$ 42,013
Securities		692,716
Loans held for sale		2,157
Portfolio loans		873,336
Premises and equipment		31,804
Other intangible assets		32,617
Mortgage servicing rights		6,946
Other assets		57,296
Total assets acquired		1,738,885
Liabilities assumed:
Deposits		1,439,203
Other borrowings		63,439
Other liabilities		24,760
Total liabilities assumed		1,527,402
Net assets acquired		211,483
Consideration paid
Cash		91,400
Common stock		166,515
Total consideration paid		257,915
Goodwill		46,432
Aggregate principal outstanding		889,300
Fair value of performing loans, including loans held for sale		871,000
Amount expected to be accreted, gross		17,000
Contractual amount of PCI loans		3,900
Accretable discount on PCI loans		200
Fair value of credit-impaired loans		$ 2,300	1,500		1,500
Total revenues (net interest income plus non-interest income)					53,700
Net income					9,500
Banc Ed | Pro Forma
Consideration paid
Total revenues (net interest income plus non-interest income)			104,543,000	$ 101,001,000	305,709,000	306,472,000
Net income			$ 30,811,000	$ 31,641,000	$ 84,742,000	$ 87,972,000
Diluted earnings per common share (in dollars per share) | $ / shares			$ 0.55	$ 0.57	$ 1.51	$ 1.60
Banc Ed | Non-interest expense
Merger agreement
Business acquisition expenses			$ 6,500		$ 11,500
IST | Non-interest expense
Merger agreement
Business acquisition expenses			$ 500		$ 700

Securities - General Disclosure

Securities - General Disclosures (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Securities
Equity securities consisting of common stock and money market mutual funds, fair value	$ 5,690,000		$ 5,690,000	$ 6,169,000
Unrealized gains (losses) recognized on equity securities	65,000		(735,000)
Debt securities available for sale
Amortized Cost	1,675,852,000		1,675,852,000	707,213,000
Gross Unrealized Gains	25,858,000		25,858,000	798,000
Gross Unrealized Losses	(705,000)		(705,000)	(10,326,000)
Fair Value	1,701,005,000		1,701,005,000	697,685,000
Debt securities held to maturity
Amortized Cost	15,170,000		15,170,000	608,660,000
Gross Unrealized Gains				1,827,000
Gross Unrealized Losses				(7,127,000)
Fair Value	15,399,000		15,399,000	603,360,000
Debt securities available for sale, Amortized Cost
Due in one year or less	128,897,000		128,897,000
Due after one year through five years	407,251,000		407,251,000
Due after five years through ten years	248,270,000		248,270,000
Due after ten years	891,434,000		891,434,000
Amortized Cost	1,675,852,000		1,675,852,000	707,213,000
Debt securities available for sale, Fair Value
Due in one year or less	129,230,000		129,230,000
Due after one year through five years	413,491,000		413,491,000
Due after five years through ten years	253,453,000		253,453,000
Due after ten years	904,831,000		904,831,000
Fair Value	1,701,005,000		1,701,005,000	697,685,000
Debt securities held to maturity, Amortized Cost
Due in one year or less	2,215,000		2,215,000
Due after one year through five years	11,834,000		11,834,000
Due after five years through ten years	1,121,000		1,121,000
Amortized Cost	15,170,000		15,170,000	608,660,000
Debt securities held to maturity, Fair Value
Due in one year or less	2,218,000		2,218,000
Due after one year through five years	12,006,000		12,006,000
Due after five years through ten years	1,175,000		1,175,000
Fair Value	15,399,000		15,399,000	603,360,000
Realized gains and losses related to sales and calls of securities AFS
Gross security gains	298,000		689,000
Gross security (losses)	(1,000)		(585,000)
Net (losses) gains on sales of securities	297,000		104,000
Debt securities available for sale, Fair Value
Continuous unrealized losses existing for less than 12 months, gross	59,657,000		59,657,000	190,737,000
Continuous unrealized losses existing for greater than 12 months, gross	98,208,000		98,208,000	417,336,000
Total, gross	157,865,000		157,865,000	608,073,000
Debt securities available for sale, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross	(116,000)		(116,000)	(1,231,000)
Continuous unrealized losses existing greater than 12 months, gross	(589,000)		(589,000)	(9,095,000)
Total, gross	$ (705,000)		$ (705,000)	(10,326,000)
Debt securities held to maturity, Fair Value
Continuous unrealized losses existing for less than 12 months, gross				98,669,000
Continuous unrealized losses existing for greater than 12 months, gross				299,707,000
Total, gross				398,376,000
Debt securities held to maturity, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross				(1,219,000)
Continuous unrealized losses existing for greater than 12 months, gross				(5,908,000)
Total, gross				(7,127,000)
Security portfolio evaluated for other-than-temporary impairment	1,208		1,208
Number of securities in unrealized loss position	74		74
Securities in unrealized loss position as a percentage of aggregate carrying value of investments	0.44%		0.44%
Collateral
Realized gains and losses related to sales and calls of securities AFS
Carrying amount of investment securities pledged as collateral	$ 768,700,000		$ 768,700,000	498,300,000
U.S. Treasury securities
Debt securities available for sale
Amortized Cost	51,395,000		51,395,000	25,824,000
Gross Unrealized Gains	262,000		262,000	1,000
Gross Unrealized Losses	(6,000)		(6,000)	(414,000)
Fair Value	51,651,000		51,651,000	25,411,000
Debt securities available for sale, Amortized Cost
Amortized Cost	51,395,000		51,395,000	25,824,000
Debt securities available for sale, Fair Value
Fair Value	51,651,000		51,651,000	25,411,000
Debt securities available for sale, Fair Value
Continuous unrealized losses existing for less than 12 months, gross				995,000
Continuous unrealized losses existing for greater than 12 months, gross	9,982,000		9,982,000	24,343,000
Total, gross	9,982,000		9,982,000	25,338,000
Debt securities available for sale, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross				(4,000)
Continuous unrealized losses existing greater than 12 months, gross	(6,000)		(6,000)	(410,000)
Total, gross	(6,000)		(6,000)	(414,000)
Obligations of U.S. government corporations and agencies
Debt securities available for sale
Amortized Cost	202,393,000		202,393,000	53,096,000
Gross Unrealized Gains	3,273,000		3,273,000	7,000
Gross Unrealized Losses	(53,000)		(53,000)	(761,000)
Fair Value	205,613,000		205,613,000	52,342,000
Debt securities available for sale, Amortized Cost
Amortized Cost	202,393,000		202,393,000	53,096,000
Debt securities available for sale, Fair Value
Fair Value	205,613,000		205,613,000	52,342,000
Debt securities available for sale, Fair Value
Continuous unrealized losses existing for less than 12 months, gross	6,938,000		6,938,000	749,000
Continuous unrealized losses existing for greater than 12 months, gross	6,481,000		6,481,000	50,744,000
Total, gross	13,419,000		13,419,000	51,493,000
Debt securities available for sale, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross	(45,000)		(45,000)	(3,000)
Continuous unrealized losses existing greater than 12 months, gross	(8,000)		(8,000)	(758,000)
Total, gross	(53,000)		(53,000)	(761,000)
Obligations of states and political subdivisions
Debt securities available for sale
Amortized Cost	263,345,000		263,345,000	171,131,000
Gross Unrealized Gains	5,733,000		5,733,000	484,000
Gross Unrealized Losses	(16,000)		(16,000)	(1,571,000)
Fair Value	269,062,000		269,062,000	170,044,000
Debt securities held to maturity
Amortized Cost	15,170,000		15,170,000	33,947,000
Gross Unrealized Gains	229,000		229,000	68,000
Gross Unrealized Losses				(87,000)
Fair Value	15,399,000		15,399,000	33,928,000
Debt securities available for sale, Amortized Cost
Amortized Cost	263,345,000		263,345,000	171,131,000
Debt securities available for sale, Fair Value
Fair Value	269,062,000		269,062,000	170,044,000
Debt securities held to maturity, Amortized Cost
Amortized Cost	15,170,000		15,170,000	33,947,000
Debt securities held to maturity, Fair Value
Fair Value	15,399,000		15,399,000	33,928,000
Debt securities available for sale, Fair Value
Continuous unrealized losses existing for less than 12 months, gross	4,949,000		4,949,000	49,893,000
Continuous unrealized losses existing for greater than 12 months, gross	9,129,000		9,129,000	77,651,000
Total, gross	14,078,000		14,078,000	127,544,000
Debt securities available for sale, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross	(11,000)		(11,000)	(460,000)
Continuous unrealized losses existing greater than 12 months, gross	(5,000)		(5,000)	(1,111,000)
Total, gross	(16,000)		(16,000)	(1,571,000)
Debt securities held to maturity, Fair Value
Continuous unrealized losses existing for less than 12 months, gross				9,531,000
Continuous unrealized losses existing for greater than 12 months, gross				9,538,000
Total, gross				19,069,000
Debt securities held to maturity, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross				(33,000)
Continuous unrealized losses existing for greater than 12 months, gross				(54,000)
Total, gross				(87,000)
Commercial mortgage-backed securities
Debt securities available for sale
Amortized Cost	121,338,000		121,338,000	2,003,000
Gross Unrealized Gains	2,248,000		2,248,000
Gross Unrealized Losses	(18,000)		(18,000)	(61,000)
Fair Value	123,568,000		123,568,000	1,942,000
Debt securities held to maturity
Amortized Cost				59,054,000
Gross Unrealized Gains				11,000
Gross Unrealized Losses				(1,003,000)
Fair Value				58,062,000
Debt securities available for sale, Amortized Cost
Amortized Cost	121,338,000		121,338,000	2,003,000
Debt securities available for sale, Fair Value
Fair Value	123,568,000		123,568,000	1,942,000
Debt securities held to maturity, Amortized Cost
Amortized Cost				59,054,000
Debt securities held to maturity, Fair Value
Fair Value				58,062,000
Debt securities available for sale, Fair Value
Continuous unrealized losses existing for less than 12 months, gross	3,913,000		3,913,000
Continuous unrealized losses existing for greater than 12 months, gross	9,702,000		9,702,000	1,942,000
Total, gross	13,615,000		13,615,000	1,942,000
Debt securities available for sale, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross	(11,000)		(11,000)
Continuous unrealized losses existing greater than 12 months, gross	(7,000)		(7,000)	(61,000)
Total, gross	(18,000)		(18,000)	(61,000)
Debt securities held to maturity, Fair Value
Continuous unrealized losses existing for less than 12 months, gross				12,067,000
Continuous unrealized losses existing for greater than 12 months, gross				45,041,000
Total, gross				57,108,000
Debt securities held to maturity, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross				(212,000)
Continuous unrealized losses existing for greater than 12 months, gross				(791,000)
Total, gross				(1,003,000)
Residential mortgage-backed securities
Debt securities available for sale
Amortized Cost	914,320,000		914,320,000	322,646,000
Gross Unrealized Gains	12,674,000		12,674,000	245,000
Gross Unrealized Losses	(607,000)		(607,000)	(7,143,000)
Fair Value	926,387,000		926,387,000	315,748,000
Debt securities held to maturity
Amortized Cost				515,659,000
Gross Unrealized Gains				1,748,000
Gross Unrealized Losses				(6,037,000)
Fair Value				511,370,000
Debt securities available for sale, Amortized Cost
Amortized Cost	914,320,000		914,320,000	322,646,000
Debt securities available for sale, Fair Value
Fair Value	926,387,000		926,387,000	315,748,000
Debt securities held to maturity, Amortized Cost
Amortized Cost				515,659,000
Debt securities held to maturity, Fair Value
Fair Value				511,370,000
Debt securities available for sale, Fair Value
Continuous unrealized losses existing for less than 12 months, gross	43,372,000		43,372,000	48,387,000
Continuous unrealized losses existing for greater than 12 months, gross	57,319,000		57,319,000	247,573,000
Total, gross	100,691,000		100,691,000	295,960,000
Debt securities available for sale, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross	(47,000)		(47,000)	(496,000)
Continuous unrealized losses existing greater than 12 months, gross	(560,000)		(560,000)	(6,647,000)
Total, gross	(607,000)		(607,000)	(7,143,000)
Debt securities held to maturity, Fair Value
Continuous unrealized losses existing for less than 12 months, gross				77,071,000
Continuous unrealized losses existing for greater than 12 months, gross				245,128,000
Total, gross				322,199,000
Debt securities held to maturity, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross				(974,000)
Continuous unrealized losses existing for greater than 12 months, gross				(5,063,000)
Total, gross				(6,037,000)
Corporate debt securities
Debt securities available for sale
Amortized Cost	123,061,000		123,061,000	132,513,000
Gross Unrealized Gains	1,668,000		1,668,000	61,000
Gross Unrealized Losses	(5,000)		(5,000)	(376,000)
Fair Value	124,724,000		124,724,000	132,198,000
Debt securities available for sale, Amortized Cost
Amortized Cost	123,061,000		123,061,000	132,513,000
Debt securities available for sale, Fair Value
Fair Value	124,724,000		124,724,000	132,198,000
Debt securities available for sale, Fair Value
Continuous unrealized losses existing for less than 12 months, gross	485,000		485,000	90,713,000
Continuous unrealized losses existing for greater than 12 months, gross	5,595,000		5,595,000	15,083,000
Total, gross	6,080,000		6,080,000	105,796,000
Debt securities available for sale, Unrealized Losses
Continuous unrealized losses existing for less than 12 months, gross	(2,000)		(2,000)	(268,000)
Continuous unrealized losses existing greater than 12 months, gross	(3,000)		(3,000)	(108,000)
Total, gross	$ (5,000)		$ (5,000)	$ (376,000)
Accounting Standards Update 2017-12
Realized gains and losses related to sales and calls of securities AFS
Transferred securities from held to maturity to available-for-sale		$ 573,600,000
Unrealized loss related to transfer of securities from held to maturity to AFS		$ 4,800,000

Portfolio loans - Distribution

Portfolio loans - Distribution (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Portfolio Loans
Portfolio loans	$ 6,669,415		$ 5,568,428
Allowance for loan losses	(52,965)	$ (51,375)	(50,648)	$ (52,743)	$ (53,305)	$ (53,582)
Portfolio loans, net	6,616,450		5,517,780
Net deferred loan origination costs	5,400		5,600
Amount of loan reduction due to net accretable purchase accounting adjustments	22,500		13,900
Commercial
Portfolio Loans
Portfolio loans	1,680,491		1,405,106
Allowance for loan losses	(16,526)	(16,733)	(17,829)	(18,966)	(17,586)	(14,779)
Commercial real estate
Portfolio Loans
Portfolio loans	2,793,380		2,366,823
Allowance for loan losses	(22,220)	(20,188)	(21,137)	(21,752)	(23,047)	(21,813)
Real estate construction
Portfolio Loans
Portfolio loans	426,559		288,197
Allowance for loan losses	(3,110)	(3,305)	(2,723)	(2,932)	(2,915)	(2,861)
Retail real estate
Portfolio Loans
Portfolio loans	1,717,555		1,480,133
Allowance for loan losses	(10,522)	(10,613)	(8,471)	(8,622)	(9,293)	(13,783)
Retail other
Portfolio Loans
Portfolio loans	51,430		28,169
Allowance for loan losses	$ (587)	$ (536)	$ (488)	$ (471)	$ (464)	$ (346)

Portfolio loans - Narrative (De

Portfolio loans - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)loan	Sep. 30, 2018USD ($)loan	Sep. 30, 2019USD ($)loancontract	Sep. 30, 2018USD ($)loan	Dec. 31, 2018USD ($)
Portfolio Loans
Net deferred loan origination costs	$ 5,400,000		$ 5,400,000		$ 5,600,000
Amount of loan reduction due to net accretable purchase accounting adjustments	22,500,000		22,500,000		$ 13,900,000
Gross interest income that would have been recorded if impaired loans had been current	500,000	$ 400,000	$ 1,600,000	$ 1,100,000
Loans classified as a TDR		$ 0
TDRs subsequently classified as non-performing and had payment defaults		0	1	0
Minimum days past due for TDR loans to be classified as non-performing			90 days
Balance of all acquired loans	1,700,000,000		$ 1,700,000,000
Commercial
Portfolio Loans
Loans classified as a TDR	$ 300,000		$ 300,000
Performing loans classified as TDRs | loan	1		1
Commercial real estate
Portfolio Loans
Loans classified as a TDR			$ 3,200,000
Retail real estate
Portfolio Loans
Loans classified as a TDR				$ 100,000
Performing loans classified as TDRs | loan				1
Loans in the process of foreclosure			3,100,000
Maximum | Commercial real estate
Portfolio Loans
Limit where loans are processed through an expedited underwriting process			1,000,000
Pass and watch | Commercial
Portfolio Loans
Limit where loans are processed through an expedited underwriting process			350,000
Pass and watch | Minimum | Commercial
Portfolio Loans
Limit where loans are processed through an expedited underwriting process			350,000
Pass and watch | Maximum | Commercial
Portfolio Loans
Limit where loans are processed through an expedited underwriting process			1,000,000
Watch | Commercial
Portfolio Loans
Limit above which loans are annually reviewed			1,000,000
Special Mention
Portfolio Loans
Limit above which loans are annually reviewed			$ 350,000

Portfolio loans - Risk Grades (

Portfolio loans - Risk Grades (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Pass
Loans
Portfolio loans receivable	$ 5,986,984	$ 4,976,708
Watch
Loans
Portfolio loans receivable	395,242	330,650
Special Mention
Loans
Portfolio loans receivable	167,921	142,839
Substandard
Loans
Portfolio loans receivable	94,889	86,060
Substandard Non-accrual
Loans
Portfolio loans receivable	31,827	34,997
Commercial | Pass
Loans
Portfolio loans receivable	1,393,420	1,126,257
Commercial | Watch
Loans
Portfolio loans receivable	167,439	172,449
Commercial | Special Mention
Loans
Portfolio loans receivable	63,516	47,000
Commercial | Substandard
Loans
Portfolio loans receivable	47,765	42,532
Commercial | Substandard Non-accrual
Loans
Portfolio loans receivable	10,708	17,953
Commercial real estate | Pass
Loans
Portfolio loans receivable	2,474,248	2,106,711
Commercial real estate | Watch
Loans
Portfolio loans receivable	189,443	137,214
Commercial real estate | Special Mention
Loans
Portfolio loans receivable	91,689	85,148
Commercial real estate | Substandard
Loans
Portfolio loans receivable	38,018	36,205
Commercial real estate | Substandard Non-accrual
Loans
Portfolio loans receivable	11,852	10,298
Real estate construction | Pass
Loans
Portfolio loans receivable	397,377	268,069
Real estate construction | Watch
Loans
Portfolio loans receivable	24,050	14,562
Real estate construction | Special Mention
Loans
Portfolio loans receivable	5,151	3,899
Real estate construction | Substandard
Loans
Portfolio loans receivable	1,130	1,888
Real estate construction | Substandard Non-accrual
Loans
Portfolio loans receivable	611	18
Retail real estate | Pass
Loans
Portfolio loans receivable	1,670,187	1,448,964
Retail real estate | Watch
Loans
Portfolio loans receivable	14,231	6,425
Retail real estate | Special Mention
Loans
Portfolio loans receivable	7,565	6,792
Retail real estate | Substandard
Loans
Portfolio loans receivable	7,963	5,435
Retail real estate | Substandard Non-accrual
Loans
Portfolio loans receivable	8,591	6,698
Retail other | Pass
Loans
Portfolio loans receivable	51,752	26,707
Retail other | Watch
Loans
Portfolio loans receivable	79
Retail other | Substandard
Loans
Portfolio loans receivable	13
Retail other | Substandard Non-accrual
Loans
Portfolio loans receivable	$ 65	$ 30

Portfolio loans - Past Due and

Portfolio loans - Past Due and Still Accruing or on a Non-accrual Status Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loans past due
Loans past due, still accruing		$ 1,601
90+Days	$ 1,276
Non-accrual Loans	31,827	34,997
30 to 59 Days
Loans past due
Loans past due, still accruing	5,352	5,053
60 to 89 Days
Loans past due
Loans past due, still accruing	7,082	2,068
Commercial
Loans past due
Loans past due, still accruing		775
90+Days	698
Non-accrual Loans	10,708	17,953
Commercial | 30 to 59 Days
Loans past due
Loans past due, still accruing	464	158
Commercial | 60 to 89 Days
Loans past due
Loans past due, still accruing	584	140
Commercial real estate
Loans past due
90+Days	222
Non-accrual Loans	11,852	10,298
Commercial real estate | 30 to 59 Days
Loans past due
Loans past due, still accruing	474	148
Commercial real estate | 60 to 89 Days
Loans past due
Loans past due, still accruing	3,040	558
Real estate construction
Loans past due
Loans past due, still accruing		58
Non-accrual Loans	611	18
Real estate construction | 30 to 59 Days
Loans past due
Loans past due, still accruing	229	121
Real estate construction | 60 to 89 Days
Loans past due
Loans past due, still accruing	198
Retail real estate
Loans past due
Loans past due, still accruing		766
90+Days	354
Non-accrual Loans	8,591	6,698
Retail real estate | 30 to 59 Days
Loans past due
Loans past due, still accruing	4,119	4,578
Retail real estate | 60 to 89 Days
Loans past due
Loans past due, still accruing	3,252	1,368
Retail other
Loans past due
Loans past due, still accruing		2
90+Days	2
Non-accrual Loans	65	30
Retail other | 30 to 59 Days
Loans past due
Loans past due, still accruing	66	48
Retail other | 60 to 89 Days
Loans past due
Loans past due, still accruing	$ 8	$ 2

Portfolio loans - Summary of Re

Portfolio loans - Summary of Restructured Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Restructured loans
Total loans	$ 12,335	$ 8,838
In compliance with modified terms
Restructured loans
Total loans	8,778	8,319
30-89 days past due
Restructured loans
Total loans		127
Included in non-performing loans
Restructured loans
Total loans	$ 3,557	$ 392

Portfolio loans - Loans Identif

Portfolio loans - Loans Identified as Impaired, Segregated by Category (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Loans identified as impaired
Unpaid Contractual Principal Balance	$ 51,642	$ 55,534
Recorded Investment with No Allowance	31,940	33,622
Recorded Investment with Allowance	12,559	16,560
Total Recorded Investment	44,499	50,182
Related Allowance	5,642	5,561
Average Recorded Investment	48,539	46,303
Commercial
Loans identified as impaired
Unpaid Contractual Principal Balance	16,593	21,442
Recorded Investment with No Allowance	9,237	6,858
Recorded Investment with Allowance	3,262	12,001
Total Recorded Investment	12,499	18,859
Related Allowance	2,671	4,319
Average Recorded Investment	16,070	13,364
Commercial real estate
Loans identified as impaired
Unpaid Contractual Principal Balance	19,011	19,079
Recorded Investment with No Allowance	8,566	13,082
Recorded Investment with Allowance	8,823	4,498
Total Recorded Investment	17,389	17,580
Related Allowance	2,497	1,181
Average Recorded Investment	18,104	18,077
Real estate construction
Loans identified as impaired
Unpaid Contractual Principal Balance	1,071	478
Recorded Investment with No Allowance	929	453
Total Recorded Investment	929	453
Average Recorded Investment	759	712
Retail real estate
Loans identified as impaired
Unpaid Contractual Principal Balance	14,869	14,418
Recorded Investment with No Allowance	13,141	13,196
Recorded Investment with Allowance	474	61
Total Recorded Investment	13,615	13,257
Related Allowance	474	61
Average Recorded Investment	13,569	14,110
Retail other
Loans identified as impaired
Unpaid Contractual Principal Balance	98	117
Recorded Investment with No Allowance	67	33
Total Recorded Investment	67	33
Average Recorded Investment	$ 37	$ 40

Portfolio loans - Allowance for

Portfolio loans - Allowance for Loan Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018
Changes in allowance for loan losses
Beginning balance	$ 51,375	$ 53,305	$ 50,648	$ 53,582
Provision for loan loss	3,411	758	8,039	4,024
Charged-off	(2,499)	(2,187)	(7,909)	(7,670)
Recoveries	678	867	2,187	2,807
Ending balance	52,965	52,743	52,965	52,743
Allowance for loan losses Ending balance attributed to:
Loans individually evaluated for impairment					$ 5,642	$ 5,561
Loans collectively evaluated for impairment					47,323	45,087
Ending balance	52,965	53,305	52,965	52,743	52,965	50,648
Allowance for loan losses and recorded investments in portfolio loans by category
Loans individually evaluated for impairment					40,689	47,404
Loans collectively evaluated for impairment					6,624,916	5,518,246
PCI loans evaluated for impairment					3,810	2,778
Ending balance					6,669,415	5,568,428
Commercial
Changes in allowance for loan losses
Beginning balance	16,733	17,586	17,829	14,779
Provision for loan loss	463	2,388	3,417	7,111
Charged-off	(817)	(1,144)	(5,187)	(3,841)
Recoveries	147	136	467	917
Ending balance	16,526	18,966	16,526	18,966
Allowance for loan losses Ending balance attributed to:
Loans individually evaluated for impairment					2,671	4,319
Loans collectively evaluated for impairment					13,855	13,510
Ending balance	16,733	17,586	17,829	14,779	16,526	17,829
Allowance for loan losses and recorded investments in portfolio loans by category
Loans individually evaluated for impairment					12,481	18,441
Loans collectively evaluated for impairment					1,667,992	1,386,247
PCI loans evaluated for impairment					18	418
Ending balance					1,680,491	1,405,106
Commercial real estate
Changes in allowance for loan losses
Beginning balance	20,188	23,047	21,137	21,813
Provision for loan loss	3,167	(1,291)	1,981	1,154
Charged-off	(1,168)	(62)	(1,183)	(1,487)
Recoveries	33	58	285	272
Ending balance	22,220	21,752	22,220	21,752
Allowance for loan losses Ending balance attributed to:
Loans individually evaluated for impairment					2,497	1,181
Loans collectively evaluated for impairment					19,723	19,956
Ending balance	20,188	23,047	21,137	21,752	22,220	21,137
Allowance for loan losses and recorded investments in portfolio loans by category
Loans individually evaluated for impairment					14,954	15,318
Loans collectively evaluated for impairment					2,775,991	2,349,243
PCI loans evaluated for impairment					2,435	2,262
Ending balance					2,793,380	2,366,823
Real estate construction
Changes in allowance for loan losses
Beginning balance	3,305	2,915	2,723	2,861
Provision for loan loss	(359)	(15)	54	22
Charged-off				(97)
Recoveries	164	32	333	146
Ending balance	3,110	2,932	3,110	2,932
Allowance for loan losses Ending balance attributed to:
Loans collectively evaluated for impairment					3,110	2,723
Ending balance	3,305	2,915	3,110	2,861	3,110	2,723
Allowance for loan losses and recorded investments in portfolio loans by category
Loans individually evaluated for impairment					494	453
Loans collectively evaluated for impairment					425,630	287,744
PCI loans evaluated for impairment					435
Ending balance					426,559	288,197
Retail real estate
Changes in allowance for loan losses
Beginning balance	10,613	9,293	8,471	13,783
Provision for loan loss	(86)	(399)	2,212	(4,609)
Charged-off	(226)	(695)	(943)	(1,637)
Recoveries	221	423	782	1,085
Ending balance	10,522	8,622	10,522	8,622
Allowance for loan losses Ending balance attributed to:
Loans individually evaluated for impairment					474	61
Loans collectively evaluated for impairment					10,048	8,410
Ending balance	10,613	9,293	10,522	13,783	10,522	8,471
Allowance for loan losses and recorded investments in portfolio loans by category
Loans individually evaluated for impairment					12,693	13,159
Loans collectively evaluated for impairment					1,703,940	1,466,876
PCI loans evaluated for impairment					922	98
Ending balance					1,717,555	1,480,133
Retail other
Changes in allowance for loan losses
Beginning balance	536	464	488	346
Provision for loan loss	226	75	375	346
Charged-off	(288)	(286)	(596)	(608)
Recoveries	113	218	320	387
Ending balance	587	471	587	471
Allowance for loan losses Ending balance attributed to:
Loans collectively evaluated for impairment					587	488
Ending balance	$ 536	$ 464	$ 587	$ 346	587	488
Allowance for loan losses and recorded investments in portfolio loans by category
Loans individually evaluated for impairment					67	33
Loans collectively evaluated for impairment					51,363	28,136
Ending balance					$ 51,430	$ 28,169

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Deposits
Demand deposits, noninterest-bearing	$ 1,779,490	$ 1,464,700
Interest-bearing transaction deposits	2,039,095	1,435,574
Saving deposits and money market deposits	2,458,910	1,852,044
Time deposits	1,652,971	1,497,003
Total deposits	7,930,466	6,249,321
Reciprocal brokered transaction deposits included in savings deposits and money market funds	14,700	17,500
Time deposits minimum denomination of $100,000 or more	899,300	673,700
Time deposits minimum denomination of $250,000 or more	309,200	264,100
Brokered deposits included in the balance of time deposits	57,300	262,500
Deposits
October 1, 2019 - September 30, 2020	468,221
October 1, 2020 - September 30, 2021	167,271
October 1, 2021 - September 30, 2022	80,492
October 1, 2022 - September 30, 2023	55,019
October 1, 2023 - September 30, 2024	881,935
Thereafter	33
Total	$ 1,652,971	$ 1,497,003

Borrowings - Maturity period (D

Borrowings - Maturity period (Details)	9 Months Ended
	Sep. 30, 2019
Maturity period
Maximum maturity period of short-term debt	1 year

Borrowings - Amended and Restat

Borrowings - Amended and Restated Credit Agreement (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Jan. 29, 2019	Dec. 31, 2018
Revolving loan facility
Borrowings
Maximum borrowing capacity		$ 20,000,000
Outstanding amounts	$ 0		$ 0
Term Loan
Borrowings
Maximum borrowing capacity		$ 60,000,000
Outstanding amounts	55,500,000
Short-term outstanding balance for the period ending	6,000,000
Long-term outstanding balance for the period ending	$ 49,500,000
Interest rate (as a percent)		1.50%

Borrowings - Long-term Debt (De

Borrowings - Long-term Debt (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Long-term debt
Notes payable, FHLB, ranging in original maturity from seven to ten years, collateralized by FHLB deposits, residential and commercial real estate loans and FHLB stock	$ 35,606	$ 50,000
Notes Payable	49,500
Total long-term borrowings	$ 85,106	$ 50,000
FHLB advances
Long-term debt
Weighted average rate (as a percent)	1.80%	2.28%
FHLB advances | Minimum
Long-term debt
Notes payable original maturity term	7 years	7 years
Interest rate (as a percent)	1.57%	2.20%
FHLB advances | Maximum
Long-term debt
Notes payable original maturity term	10 years	10 years
Interest rate (as a percent)	3.04%	2.41%

Borrowings - Senior notes and S

Borrowings - Senior notes and Subordinate Notes (Details) - USD ($) $ in Millions	May 25, 2017	Sep. 30, 2019	Dec. 31, 2018
Long-term debt
Unamortized debt issuance cost		$ 5.4	$ 5.6
Senior notes
Long-term debt
Issuance of debt	$ 40
Interest rate (as a percent)	3.75%
Unamortized debt issuance cost		0.4	0.5
Subordinated debt
Long-term debt
Issuance of debt	$ 60
Interest rate (as a percent)	4.75%
Term of debt instrument	5 years
Unamortized debt issuance cost		$ 0.8	$ 0.9
Three-month LIBOR | Subordinated debt
Long-term debt
Floating interest rate margin (as a percent)	2.919%

Junior Subordinated Debt Owed_2

Junior Subordinated Debt Owed to Unconsolidated Trusts (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Junior subordinated debt owed to unconsolidated trusts
Junior subordinated debt owed to unconsolidated trusts	$ 71,269	$ 71,155
Trust Preferred Securities
Junior subordinated debt owed to unconsolidated trusts
Percentage limit on inclusion of qualifying trust preferred securities in Tier I Capital	25.00%
Trust preferred securities qualified as Tier I capital (as a percent)	100.00%
Maximum of holding companies assets retained	$ 15,000,000
Junior Subordinated Notes | Trust Preferred Securities
Junior subordinated debt owed to unconsolidated trusts
Maximum period to defer payment of interest on the notes and, therefore, distributions on the trust preferred securities	5 years
Parent | Reportable legal entities
Junior subordinated debt owed to unconsolidated trusts
Junior subordinated debt owed to unconsolidated trusts	$ 71,300	$ 71,200

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income per share calculations for basic and diluted methods
Net income available to common stockholders	$ 24,828	$ 26,859	$ 74,382	$ 73,638
Shares:
Weighted average common shares outstanding	55,410,000	48,892,000	54,783,000	48,828,000
Dilutive effect of outstanding options, warrants and restricted stock units as determined by the application of the treasury stock method (in shares)	236,000	355,000	275,000	388,000
Weighted average common shares outstanding, as adjusted for diluted earnings per share calculation	55,646,000	49,247,000	55,058,000	49,216,000
Basic earnings per common share (in dollars per share)	$ 0.45	$ 0.55	$ 1.36	$ 1.51
Diluted earnings per common share (in dollars per share)	$ 0.45	$ 0.55	$ 1.35	$ 1.50
RSU
Anti-dilutive securities excluded from the calculation of common stock equivalents
Number of anti-dilutive securities (in shares)			385,322	172,571
Warrants
Anti-dilutive securities excluded from the calculation of common stock equivalents
Number of anti-dilutive securities (in shares)			191,278	191,278

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Changes in accumulated other comprehensive income (loss) by component, net of tax
Accumulated other comprehensive income (loss) beginning balance period, net of tax	$ 1,203,608,000	$ 957,182,000	$ 994,964,000	$ 935,003,000
Unrealized gains (losses) on debt securities available for sale:
Unrealized holding gains (losses) on debt securities available for sale, Tax Effect	(1,423,000)	860,000	(8,552,000)	3,830,000
Unrealized holding gains (losses) on debt securities available for sale, Net of Tax	3,568,000	(2,159,000)	21,453,000	(9,609,000)
Unrealized gains on debt securities transferred from held to maturity to available for sale, Tax Effect			1,363,000
Unrealized gains on debt securities transferred from held to maturity to available for sale, Net of Tax			3,417,000
Amounts reclassified from accumulated other comprehensive income, Tax Effect	(85,000)		(29,000)
Amounts reclassified from accumulated other comprehensive income, Net of Tax	(212,000)		(75,000)
Unrealized gains (losses) on cash flow hedges:
Unrealized holding gains (losses) on cash flow hedges, Tax Effect	(239,000)		(239,000)
Unrealized holding gains (losses) on cash flow hedges, Net of Tax	(598,000)		(598,000)
Amounts reclassified from accumulated other comprehensive income, Tax Effect	3,000		3,000
Amounts reclassified from accumulated other comprehensive income, Net of Tax	6,000		6,000
Accumulated other comprehensive income (loss) ending balance period, net of tax	1,215,981,000	972,140,000	1,215,981,000	972,140,000
Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss) by component, net of tax
Accumulated other comprehensive income (loss) beginning balance period, net of tax	14,627,000	(10,865,000)	(6,812,000)	(2,810,000)
Unrealized gains (losses) on debt securities available for sale:
Tax Cuts and Jobs Act of 2017 reclassification				(605,000)
Unrealized gains (losses) on cash flow hedges:
Accumulated other comprehensive income (loss) ending balance period, before tax	24,325,000	(18,216,000)	24,325,000	(18,216,000)
Accumulated other comprehensive income (loss) ending balance period, tax effect	(6,934,000)	5,192,000	(6,934,000)	5,192,000
Accumulated other comprehensive income (loss) ending balance period, net of tax	17,391,000	(13,024,000)	17,391,000	(13,024,000)
Unrealized gains (losses) on debt securities available for sale
Changes in accumulated other comprehensive income (loss) by component, net of tax
Accumulated other comprehensive income (loss) beginning balance period, before tax	20,459,000	(15,197,000)	(9,528,000)	(4,777,000)
Accumulated other comprehensive income (loss) beginning balance period, tax effect	(5,832,000)	4,332,000	2,716,000	1,967,000
Accumulated other comprehensive income (loss) beginning balance period, net of tax	14,627,000	(10,865,000)	(6,812,000)	(2,810,000)
Unrealized gains (losses) on debt securities available for sale:
Unrealized holding gains (losses) on debt securities available for sale, Before Tax	4,991,000	(3,019,000)	30,005,000	(13,439,000)
Unrealized holding gains (losses) on debt securities available for sale, Tax Effect	(1,423,000)	860,000	(8,552,000)	3,830,000
Unrealized holding gains (losses) on debt securities available for sale, Net of Tax	3,568,000	(2,159,000)	21,453,000	(9,609,000)
Unrealized gains on debt securities transferred from held to maturity to available for sale, Before Tax			4,780,000
Unrealized gains on debt securities transferred from held to maturity to available for sale, Tax Effect			(1,363,000)
Unrealized gains on debt securities transferred from held to maturity to available for sale, Net of Tax			3,417,000
Amounts reclassified from accumulated other comprehensive income, Before Tax	(297,000)		(104,000)
Amounts reclassified from accumulated other comprehensive income, Tax Effect	85,000		29,000
Amounts reclassified from accumulated other comprehensive income, Net of Tax	(212,000)		(75,000)
Tax Cuts and Jobs Act of 2017 reclassification				(605,000)
Unrealized gains (losses) on cash flow hedges:
Accumulated other comprehensive income (loss) ending balance period, before tax	25,153,000	(18,216,000)	25,153,000	(18,216,000)
Accumulated other comprehensive income (loss) ending balance period, tax effect	(7,170,000)	5,192,000	(7,170,000)	5,192,000
Accumulated other comprehensive income (loss) ending balance period, net of tax	17,983,000	$ (13,024,000)	17,983,000	$ (13,024,000)
Unrealized gains (losses) on cash flow hedges
Unrealized gains (losses) on cash flow hedges:
Unrealized holding gains (losses) on cash flow hedges, Before Tax	(837,000)		(837,000)
Unrealized holding gains (losses) on cash flow hedges, Tax Effect	239,000		(239,000)
Unrealized holding gains (losses) on cash flow hedges, Net of Tax	(598,000)		(598,000)
Amounts reclassified from accumulated other comprehensive income, Before Tax	9,000		9,000
Amounts reclassified from accumulated other comprehensive income, Tax Effect	(3,000)		(3,000)
Amounts reclassified from accumulated other comprehensive income, Net of Tax	6,000		6,000
Accumulated other comprehensive income (loss) ending balance period, before tax	(828,000)		(828,000)
Accumulated other comprehensive income (loss) ending balance period, tax effect	236,000		236,000
Accumulated other comprehensive income (loss) ending balance period, net of tax	$ (592,000)		$ (592,000)

Share-based Compensation (Detai

Share-based Compensation (Details) - shares	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Share-based Compensation
Number of shares held in treasury	713,456	310,745
RSU
Share-based Compensation
Number of shares of common stock per award	1
Minimum | RSU
Share-based Compensation
Requisite service periods	1 year
Maximum | RSU
Share-based Compensation
Requisite service periods	5 years
Board of directors and advisory directors | DSUs
Share-based Compensation
Number of shares of common stock per award	1
Settlement period	30 days

Share-based Compensation - Awar

Share-based Compensation - Award Status (Details) - Stock option awards	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Shares
Outstanding at beginning of year (in shares) | shares	87,600
Exercised (in shares) | shares	(23,561)
Forfeited (in shares) | shares	(3,003)
Expired (in shares) | shares	(5,767)
Outstanding at end of year (in shares) | shares	55,269
Exercisable at end of year (in shares) | shares	39,825
Weighted-Average Exercise Price
Outstanding at beginning of year (in dollars per share) | $ / shares	$ 20.58
Exercised (in dollars per share) | $ / shares	17.69
Forfeited (in dollars per share) | $ / shares	23.53
Expired (in dollars per share) | $ / shares	17.38
Outstanding at end of year (in dollars per share) | $ / shares	21.99
Exercisable at end of year (in dollars per share) | $ / shares	$ 21.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	5 years 8 months 15 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 1 month 9 days

Share-based Compensation - Rest

Share-based Compensation - Restricted and Deferred Stock Units (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 25, 2019	Jul. 05, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
RSU
Shares
Non-vested at beginning of year (in shares)					690,495
Granted (in shares)					216,411
Dividend equivalents earned (in shares)					17,559
Vested (in shares)					(104,760)
Forfeited (in shares)					(4,712)
Non-vested at end of year (in shares)			814,993		814,993
Outstanding at end of year (in shares)			814,993		814,993
Weighted-Average Grant Date Fair Value
Non-vested at beginning of year (in dollars per share)					$ 26.14
Granted (in dollars per share)					26.73
Dividend equivalents earned (in dollars per share)					26.07
Vested (in dollars per share)					18.40
Forfeited (in dollars per share)					30.47
Non-vested at end of year (in dollars per share)			$ 27.26		27.26
Outstanding at end of year (in dollars per share)			$ 27.26		$ 27.26
RSU | Members of management
Shares
Granted (in shares)	11,592
Stock price (in dollars per share)	$ 25.88	$ 26.78
Additional disclosures
Compensation expense recognized	$ 0.3	$ 5.3
Period over which cost will be recognized	3 years	5 years
Vesting percentage (as a percent)	100.00%	100.00%
DSUs
Shares
Non-vested at beginning of year (in shares)					20,449
Granted (in shares)					20,984
Dividend equivalents earned (in shares)					1,961
Vested (in shares)					(20,723)
Forfeited (in shares)					(1,523)
Non-vested at end of year (in shares)			21,148		21,148
Outstanding at end of year (in shares)			89,831		89,831
Weighted-Average Grant Date Fair Value
Non-vested at beginning of year (in dollars per share)					$ 27.93
Granted (in dollars per share)					26.78
Dividend equivalents earned (in dollars per share)					26.07
Vested (in dollars per share)					31.18
Forfeited (in dollars per share)					31.62
Non-vested at end of year (in dollars per share)			$ 23.17		23.17
Outstanding at end of year (in dollars per share)			$ 23.36		$ 23.36
DSUs | Directors
Shares
Stock price (in dollars per share)		$ 26.78
Additional disclosures
Amount of compensation cost to be recognized		$ 0.6
Period over which cost will be recognized		1 year
RSUs and DSUs
Additional disclosures
Compensation expense recognized			$ 1.2	$ 0.9	$ 3.1	$ 2.5
Amount of compensation cost to be recognized			$ 14		$ 14
Period over which cost will be recognized					3 years 7 months 6 days
Employee stock purchase plan
Additional disclosures
Remaining shares available for issuance			50,463		50,463
Stock option awards
Additional disclosures
Compensation expense recognized			$ 0.1	$ 0.1	$ 0.1	$ 0.2
First Community 2016 Equity Incentive Plan
Additional disclosures
Remaining shares available for issuance			297,216		297,216
First Community 2016 Equity Incentive Plan | RSU | Members of management
Shares
Granted (in shares)		10,644
First Community 2016 Equity Incentive Plan | DSUs | Directors
Shares
Granted (in shares)		1,867
2010 Equity Incentive Plan
Additional disclosures
Remaining shares available for issuance			535,377		535,377
2010 Equity Incentive Plan | RSU | Members of management
Shares
Granted (in shares)		185,400
2010 Equity Incentive Plan | RSU | Chairman
Shares
Granted (in shares)		8,775
Stock price (in dollars per share)		$ 26.78
Additional disclosures
Compensation expense recognized		$ 0.2
Period over which cost will be recognized		5 years
Vesting percentage (as a percent)		100.00%
2010 Equity Incentive Plan | DSUs
Shares
Granted (in shares)		1,568
2010 Equity Incentive Plan | DSUs | Directors
Shares
Granted (in shares)		17,549

Outstanding Commitments and C_3

Outstanding Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Commitments to extend credit
Credit Commitments and Contingencies
Financial instruments whose contract amounts represent credit risk	$ 1,664,799	$ 1,398,483
Standby letters of credit
Credit Commitments and Contingencies
Financial instruments whose contract amounts represent credit risk	$ 40,073	$ 32,156

Regulatory Capital (Details)

Regulatory Capital (Details) - USD ($) $ in Thousands	Oct. 12, 2018	Sep. 30, 2019	Dec. 31, 2018
Total Capital (to Risk Weighted Assets), Amount
Actual, Amount		$ 1,020,195	$ 894,572
Minimum Capital Requirement, Amount		595,295	482,638
Minimum To Be Well Capitalized, Amount		$ 744,118	$ 603,297
Total Capital (to Risk Weighted Assets), Ratio
Actual, Ratio (as a percent)		13.71%	14.83%
Minimum Capital Requirement, Ratio (as a percent)		8.00%	8.00%
Minimum To Be Well Capitalized, Ratio (as a percent)		10.00%	10.00%
Tier 1 Capital (to Risk Weighted Assets), Amount
Actual, Amount		$ 907,230	$ 783,924
Minimum Capital Requirement, Amount		446,471	361,978
Minimum To Be Well Capitalized, Amount		$ 595,295	$ 482,638
Tier 1 Capital (to Risk Weighted Assets), Ratio
Actual, Ratio (as a percent)		12.19%	12.99%
Minimum Capital Requirement, Ratio (as a percent)		6.00%	6.00%
Minimum To Be Well Capitalized, Ratio (as a percent)		8.00%	8.00%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Amount
Actual, Amount		$ 833,230	$ 709,924
Minimum Capital Requirement, Amount		334,854	271,484
Minimum To Be Well Capitalized, Amount		$ 483,677	$ 392,143
Common Equity Tier 1 Capital (to Risk Weighted Assets), Ratio
Actual, Ratio (as a percent)		11.20%	11.77%
Minimum Capital Requirement, Ratio (as a percent)		4.50%	4.50%
Minimum To Be Well Capitalized, Ratio (as a percent)		6.50%	6.50%
Tier 1 Capital (to Average Assets), Amount
Actual, Amount		$ 907,230	$ 783,924
Minimum Capital Requirement, Amount		$ 371,129	$ 302,704
Tier 1 Capital (to Average Assets), Ratio
Actual, Ratio (as a percent)		9.78%	10.36%
Minimum Capital Requirement, Ratio (as a percent)		4.00%	4.00%
Busey Bank
Total Capital (to Risk Weighted Assets), Amount
Actual, Amount		$ 883,146	$ 854,351
Minimum Capital Requirement, Amount		507,070	481,701
Minimum To Be Well Capitalized, Amount		$ 633,837	$ 602,126
Total Capital (to Risk Weighted Assets), Ratio
Actual, Ratio (as a percent)		13.93%	14.19%
Minimum Capital Requirement, Ratio (as a percent)		8.00%	8.00%
Minimum To Be Well Capitalized, Ratio (as a percent)		10.00%	10.00%
Tier 1 Capital (to Risk Weighted Assets), Amount
Actual, Amount		$ 830,995	$ 803,703
Minimum Capital Requirement, Amount		380,303	361,276
Minimum To Be Well Capitalized, Amount		$ 507,070	$ 481,701
Tier 1 Capital (to Risk Weighted Assets), Ratio
Actual, Ratio (as a percent)		13.11%	13.35%
Minimum Capital Requirement, Ratio (as a percent)		6.00%	6.00%
Minimum To Be Well Capitalized, Ratio (as a percent)		8.00%	8.00%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Amount
Actual, Amount		$ 830,995	$ 803,703
Minimum Capital Requirement, Amount		285,227	270,957
Minimum To Be Well Capitalized, Amount		$ 411,994	$ 391,382
Common Equity Tier 1 Capital (to Risk Weighted Assets), Ratio
Actual, Ratio (as a percent)		13.11%	13.35%
Minimum Capital Requirement, Ratio (as a percent)		4.50%	4.50%
Minimum To Be Well Capitalized, Ratio (as a percent)		6.50%	6.50%
Tier 1 Capital (to Average Assets), Amount
Actual, Amount		$ 830,995	$ 803,703
Minimum Capital Requirement, Amount		298,943	302,232
Minimum To Be Well Capitalized, Amount		$ 373,679	$ 377,789
Tier 1 Capital (to Average Assets), Ratio
Actual, Ratio (as a percent)		11.12%	10.64%
Minimum Capital Requirement, Ratio (as a percent)		4.00%	4.00%
Minimum To Be Well Capitalized, Ratio (as a percent)		5.00%	5.00%
Banc Ed
Total Capital (to Risk Weighted Assets), Amount
Actual, Amount		$ 198,244
Minimum Capital Requirement, Amount		87,743
Minimum To Be Well Capitalized, Amount		$ 109,678
Total Capital (to Risk Weighted Assets), Ratio
Actual, Ratio (as a percent)		18.08%
Minimum Capital Requirement, Ratio (as a percent)		8.00%
Minimum To Be Well Capitalized, Ratio (as a percent)		10.00%
Tier 1 Capital (to Risk Weighted Assets), Amount
Actual, Amount		$ 197,430
Minimum Capital Requirement, Amount		65,807
Minimum To Be Well Capitalized, Amount		$ 87,743
Tier 1 Capital (to Risk Weighted Assets), Ratio
Actual, Ratio (as a percent)		18.00%
Minimum Capital Requirement, Ratio (as a percent)		6.00%
Minimum To Be Well Capitalized, Ratio (as a percent)		8.00%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Amount
Actual, Amount		$ 197,430
Minimum Capital Requirement, Amount		49,356
Minimum To Be Well Capitalized, Amount		$ 71,291
Common Equity Tier 1 Capital (to Risk Weighted Assets), Ratio
Actual, Ratio (as a percent)		18.00%
Minimum Capital Requirement, Ratio (as a percent)		4.50%
Minimum To Be Well Capitalized, Ratio (as a percent)		6.50%
Tier 1 Capital (to Average Assets), Amount
Actual, Amount		$ 197,430
Minimum Capital Requirement, Amount		74,851
Minimum To Be Well Capitalized, Amount		$ 93,563
Tier 1 Capital (to Average Assets), Ratio
Actual, Ratio (as a percent)		10.55%
Minimum Capital Requirement, Ratio (as a percent)		4.00%
Minimum To Be Well Capitalized, Ratio (as a percent)		5.00%
Busey Bank
Regulatory Capital
Distribution received through chartered amendment	$ 40,000

Operating Segments and Relate_3

Operating Segments and Related Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)segment	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Operating Segments and Related Information
Number of reportable segments | segment			3
Number of operating segments | segment			3
Goodwill	$ 322,699,000		$ 322,699,000		$ 267,685,000
Total Assets	9,753,760,000		9,753,760,000		7,702,357,000
Net interest income	73,476,000	$ 60,774,000	215,287,000	$ 180,903,000
Non-interest income:	30,936,000	21,853,000	84,777,000	67,141,000
Non-interest expense:	68,121,000	45,929,000	193,304,000	144,274,000
Income before income taxes	32,880,000	35,940,000	98,721,000	99,746,000
Net income:	24,828,000	26,859,000	74,382,000	73,638,000
Operating segments | Banking
Operating Segments and Related Information
Goodwill	293,431,000		293,431,000		246,999,000
Total Assets	9,704,121,000		9,704,121,000		7,656,709,000
Net interest income	75,955,000	62,578,000	222,537,000	186,103,000
Non-interest income:	18,301,000	11,196,000	46,743,000	33,827,000
Non-interest expense:	56,593,000	37,034,000	158,659,000	116,275,000
Income before income taxes	34,252,000	35,982,000	102,582,000	99,631,000
Net income:	25,731,000	26,486,000	76,837,000	73,235,000
Operating segments | Remittance Processing
Operating Segments and Related Information
Goodwill	8,992,000		8,992,000		8,992,000
Total Assets	43,138,000		43,138,000		39,278,000
Net interest income	20,000	17,000	56,000	49,000
Non-interest income:	4,088,000	4,042,000	12,386,000	11,812,000
Non-interest expense:	2,746,000	2,718,000	8,099,000	7,808,000
Income before income taxes	1,362,000	1,341,000	4,343,000	4,053,000
Net income:	972,000	957,000	3,102,000	2,896,000
Operating segments | Wealth Management
Operating Segments and Related Information
Goodwill	20,276,000		20,276,000		11,694,000
Total Assets	28,587,000		28,587,000		20,992,000
Net interest income		110,000		304,000
Non-interest income:	8,994,000	7,391,000	27,721,000	23,840,000
Non-interest expense:	6,043,000	4,307,000	17,356,000	13,921,000
Income before income taxes	2,951,000	3,194,000	10,365,000	10,223,000
Net income:	2,184,000	2,280,000	7,670,000	7,332,000
Other
Operating Segments and Related Information
Total Assets	(22,086,000)		(22,086,000)		$ (14,622,000)
Net interest income	(2,499,000)	(1,931,000)	(7,306,000)	(5,553,000)
Non-interest income:	(447,000)	(776,000)	(2,073,000)	(2,338,000)
Non-interest expense:	2,739,000	1,870,000	9,190,000	6,270,000
Income before income taxes	(5,685,000)	(4,577,000)	(18,569,000)	(14,161,000)
Net income:	$ (4,059,000)	$ (2,864,000)	$ (13,227,000)	$ (9,825,000)

Derivative Financial Instrume_3

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Interest Rate Lock Commitments
Derivative Financial Instruments
Aggregate notional amount	$ 135,600		$ 135,600		$ 27,200
Forward Sales Commitments
Derivative Financial Instruments
Aggregate notional amount	189,500		189,500		48,600
Interest rate lock commitments and forward sales commitments
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Net gains (losses)	(51)	$ 80	(111)	$ (273)
Interest rate lock commitments and forward sales commitments | Non-interest income
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Gross gains	1,655	641	4,662	2,396
Interest rate lock commitments and forward sales commitments | Non-interest expense
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Gross (losses)	(1,706)	(561)	(4,773)	(2,669)
Interest rate lock commitments and forward sales commitments | Other assets
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	1,182		1,182		624
Interest rate lock commitments and forward sales commitments | Other liabilities
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other liabilities	1,707		1,707		1,205
Interest rate swap
Derivative Financial Instruments
Aggregate notional amount	511,400		511,400		243,700
Variable rate, commercial loans that are supported by the interest rate swap contracts	255,700		255,700		121,800
Derivative cash pledged					1,000
Derivative securities pledged	18,600		18,600
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Net gains (losses)	0	0	0	0
Interest rate swap | Non-interest income
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Gross gains	4,695	724	15,205	2,167
Interest rate swap | Non-interest expense
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Gross (losses)	(4,695)	$ (724)	(15,205)	$ (2,167)
Interest rate swap | Cash Flow Hedging
Derivative Financial Instruments
Aggregate notional amount	$ 70,000		$ 70,000
Weighted average fixed pay rates	1.80%		1.80%
Weighted average receive rates	2.12%		2.12%
Weighted average maturity			4 years 1 month 9 days
Unrealized gains (losses)			$ 592
Unrealized gain to be reclassified from OCI to interest expense during next twelve months			100
Gross gains and losses on derivative assets and liabilities recorded in Consolidated Statements of Income
Amount of ineffectiveness included in net income	$ 0
Interest rate swap | Other assets
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	16,643		16,643		1,438
Interest rate swap | Other liabilities
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other liabilities	16,643		16,643		$ 1,438
Interest rate swap | Other liabilities | Cash Flow Hedging
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other liabilities	800		800
Interest rate contract
Derivative Financial Instruments
Derivative cash pledged	800		800
Interest rate contract | Cash Flow Hedging
Derivative Financial Instruments
Amount of (gain) loss recognized in OCI (effective portion)	(598)		(598)
Amount of (gain) loss reclassified from OCI to interest income	$ (6)		$ (6)

Fair Value Measurements - Gener

Fair Value Measurements - General Disclosures (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	$ 1,701,005	$ 697,685
Equity securities	5,690	6,169
Loans held for sale, at fair value	70,345	25,895
U.S. Treasury securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	51,651	25,411
Obligations of U.S. government corporations and agencies
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	205,613	52,342
Obligations of states and political subdivisions
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	269,062	170,044
Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	123,568	1,942
Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	926,387	315,748
Corporate debt securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	124,724	132,198
Recurring basis
Financial assets and financial liabilities measured at fair value
Equity securities	5,690	6,169
Loans held for sale, at fair value	70,345	25,895
Recurring basis | Derivative assets
Financial assets and financial liabilities measured at fair value
Fair value recorded in other assets	17,825	2,062
Recurring basis | Derivative liabilities
Financial assets and financial liabilities measured at fair value
Fair value recorded in other liabilities	19,177	2,643
Recurring basis | U.S. Treasury securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	51,651	25,411
Recurring basis | Obligations of U.S. government corporations and agencies
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	205,613	52,342
Recurring basis | Obligations of states and political subdivisions
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	269,062	170,044
Recurring basis | Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	123,568	1,942
Recurring basis | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	926,387	315,748
Recurring basis | Corporate debt securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	124,724	132,198
Recurring basis | Level 1
Financial assets and financial liabilities measured at fair value
Equity securities		6,169
Recurring basis | Level 2
Financial assets and financial liabilities measured at fair value
Equity securities	5,690
Loans held for sale, at fair value	70,345	25,895
Recurring basis | Level 2 | Derivative assets
Financial assets and financial liabilities measured at fair value
Fair value recorded in other assets	17,825	2,062
Recurring basis | Level 2 | Derivative liabilities
Financial assets and financial liabilities measured at fair value
Fair value recorded in other liabilities	19,177	2,643
Recurring basis | Level 2 | U.S. Treasury securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	51,651	25,411
Recurring basis | Level 2 | Obligations of U.S. government corporations and agencies
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	205,613	52,342
Recurring basis | Level 2 | Obligations of states and political subdivisions
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	269,062	170,044
Recurring basis | Level 2 | Commercial mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	123,568	1,942
Recurring basis | Level 2 | Residential mortgage-backed securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	926,387	315,748
Recurring basis | Level 2 | Corporate debt securities
Financial assets and financial liabilities measured at fair value
Debt securities available for sale	$ 124,724	$ 132,198

Fair Value Measurements - Addit

Fair Value Measurements - Additional Quantitative Information (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	$ 44,499,000	$ 50,182,000
Non-recurring basis
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	6,917,000	10,999,000
OREO	55,000	55,000
Bank property held for sale	1,832,000	1,832,000
Non-recurring basis | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	6,917,000	10,999,000
OREO	55,000	55,000
Bank property held for sale	1,832,000	1,832,000
Non-recurring basis | Level 3 | Appraisal of collateral | Impaired loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	6,917,000	10,999,000
Non-recurring basis | Level 3 | Appraisal of collateral | OREO
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
OREO	55,000	55,000
Non-recurring basis | Level 3 | Appraisal of collateral or real estate listing price | Bank property held for sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bank property held for sale	$ 1,832,000	$ 1,832,000
Appraisal adjustments | Non-recurring basis | Level 3 | Appraisal of collateral | Impaired loans | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans (percent)	(5.6)	(3.3)
Appraisal adjustments | Non-recurring basis | Level 3 | Appraisal of collateral | Impaired loans | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans (percent)	(100)	(100)
Appraisal adjustments | Non-recurring basis | Level 3 | Appraisal of collateral | Impaired loans | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans		$ (24.1)
Impaired loans (percent)	(39.2)
Appraisal adjustments | Non-recurring basis | Level 3 | Appraisal of collateral | OREO | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
OREO (percent)	(25)	(25)
Appraisal adjustments | Non-recurring basis | Level 3 | Appraisal of collateral | OREO | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
OREO (percent)	(100)	(100)
Appraisal adjustments | Non-recurring basis | Level 3 | Appraisal of collateral | OREO | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
OREO (percent)	(65)	(65)
Appraisal adjustments | Non-recurring basis | Level 3 | Appraisal of collateral or real estate listing price | Bank property held for sale | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bank property held for sale		$ 0
Bank property held for sale (percent)	0
Appraisal adjustments | Non-recurring basis | Level 3 | Appraisal of collateral or real estate listing price | Bank property held for sale | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bank property held for sale		$ (35.1)
Bank property held for sale (percent)	(35.1)
Appraisal adjustments | Non-recurring basis | Level 3 | Appraisal of collateral or real estate listing price | Bank property held for sale | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bank property held for sale (percent)	(28.3)	(28.3)

Fair Value Measurements - Segre

Fair Value Measurements - Segregated by Level of Valuation Inputs (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial assets:
Cash and cash equivalents	$ 525,457	$ 239,973
Securities held to maturity	15,399	603,360
Portfolio loans, net	6,616,450	5,517,780
Financial liabilities:
Short-term borrowings	29,739
Junior subordinated debt owed to unconsolidated trusts	71,269	71,155
Level 1 | Carrying Amount
Financial assets:
Cash and cash equivalents	525,457	239,973
Level 1 | Fair Value
Financial assets:
Cash and cash equivalents	525,457	239,973
Level 2 | Carrying Amount
Financial assets:
Securities held to maturity	15,170	608,660
Accrued interest receivable	29,408	22,314
Financial liabilities:
Time deposits	1,652,971	1,497,003
Securities sold under agreements to repurchase	202,500	185,796
Short-term borrowings	29,739
Long-term debt	85,106	50,000
Junior subordinated debt owed to unconsolidated trusts	71,269	71,155
Accrued interest payable	7,487	6,568
Level 2 | Fair Value
Financial assets:
Securities held to maturity	15,399	603,360
Accrued interest receivable	29,408	22,314
Financial liabilities:
Time deposits	1,654,955	1,482,301
Securities sold under agreements to repurchase	202,500	185,796
Short-term borrowings	29,835
Long-term debt	85,238	49,873
Junior subordinated debt owed to unconsolidated trusts	73,292	65,182
Accrued interest payable	7,487	6,568
Level 3 | Carrying Amount
Financial assets:
Portfolio loans, net	6,616,450	5,517,780
Mortgage servicing rights	9,276	3,315
Other servicing rights	1,039	781
Level 3 | Fair Value
Financial assets:
Portfolio loans, net	6,630,255	5,473,063
Mortgage servicing rights	11,410	11,051
Other servicing rights	1,676	1,443
Level 3 | Senior notes | Carrying Amount
Financial liabilities:
Long-term debt	39,640	39,539
Level 3 | Senior notes | Fair Value
Financial liabilities:
Long-term debt	40,144	39,452
Level 3 | Subordinated debt | Carrying Amount
Financial liabilities:
Long-term debt	59,222	59,147
Level 3 | Subordinated debt | Fair Value
Financial liabilities:
Long-term debt	$ 60,971	$ 58,186

Leases (Details)

Leases (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases
Right of use asset	$ 9,979
Lease liability	$ 10,101

Leases - Lease cost and other l

Leases - Lease cost and other lease information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Lease Costs
Operating lease costs	$ 619		$ 1,736
Variable lease costs	133		363
Short-term lease costs	46		69
Net lease cost	798	$ 600	2,168	$ 1,900
Cash paid for amounts included in the measurement of lease liabilities
Operating lease cash flows - Fixed payments	605		1,688
Operating lease cash flows - Liability reduction	526		1,479
Right of use assets obtained during the period in exchange for operating lease liabilities	$ 159		$ 923
Weighted average lease term (in years)	6 years 8 months 23 days		6 years 8 months 23 days
Weighted average discount rate (in percent)	3.04%		3.04%

Leases - Future rent commitment

Leases - Future rent commitments (Details) $ in Thousands	Sep. 30, 2019USD ($)
Projected minimum rental payments under the terms of leases
2019	$ 613
2020	2,386
2021	1,763
2022	1,375
2023	1,217
Thereafter	3,895
Amounts representing interest	(1,148)
Present value of net future minimum lease payments	$ 10,101