Glacier Bancorp (GBCI) 10-Q 1 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 16, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	GLACIER BANCORP INC
Trading Symbol	GBCI
Entity Central Index Key	868,671
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		84,521,692

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash on hand and in banks	$ 171,394	$ 139,948
Interest bearing cash deposits	135,710	60,056
Cash and cash equivalents	307,104	200,004
Debt securities, available-for-sale	2,103,619	1,778,243
Debt securities, held-to-maturity	590,915	648,313
Total debt securities	2,694,534	2,426,556
Loans held for sale, at fair value	50,649	38,833
Loans receivable	8,123,245	6,577,824
Allowance for loan and lease losses	(132,535)	(129,568)
Loans receivable, net	7,990,710	6,448,256
Premises and equipment, net	239,006	177,348
Other real estate owned	12,399	14,269
Accrued interest receivable	62,248	44,462
Deferred tax asset	37,264	38,344
Core deposit intangible, net	50,973	14,184
Goodwill	289,535	177,811
Non-marketable equity securities	16,502	29,884
Bank-owned life insurance	81,850	59,351
Other assets	76,328	37,047
Total assets	11,909,102	9,706,349
Liabilities
Non-interest bearing deposits	3,103,112	2,311,902
Interest bearing deposits	6,498,070	5,267,845
Securities sold under agreements to repurchase	408,754	362,573
Federal Home Loan Bank advances	155,328	353,995
Other borrowed funds	9,944	8,224
Subordinated debentures	134,055	126,135
Accrued interest payable	4,065	3,450
Other liabilities	103,162	73,168
Total liabilities	10,416,490	8,507,292
Stockholders' Equity
Preferred shares, $0.01 par value per share, 1,000,000 shares authorized, none issued or outstanding	0	0
Common stock, $0.01 par value per share, 117,187,500 shares authorized	845	780
Paid-in capital	1,050,463	797,997
Retained earnings - substantially restricted	471,021	402,259
Accumulated other comprehensive loss	(29,717)	(1,979)
Total stockholders' equity	1,492,612	1,199,057
Total liabilities and stockholders' equity	$ 11,909,102	$ 9,706,349
Number of common stock shares issued and outstanding	84,521,093	78,006,956

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Financial Condition (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized	1,000,000	1,000,000
Preferred shares, issued	0	0
Preferred shares, outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	117,187,500	117,187,500

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest Income
Investment securities	$ 21,971	$ 19,987	$ 64,483	$ 63,305
Residential real estate loans	10,356	8,326	29,290	24,594
Commercial loans	80,587	59,875	221,926	166,027
Consumer and other loans	9,991	8,276	27,987	24,198
Total interest income	122,905	96,464	343,686	278,124
Interest Expense
Deposits	4,837	4,564	13,370	13,505
Securities sold under agreements to repurchase	570	537	1,541	1,362
Federal Home Loan Bank advances	2,132	1,398	6,734	4,642
Other borrowed funds	63	21	105	55
Subordinated debentures	1,558	1,132	4,345	3,228
Total interest expense	9,160	7,652	26,095	22,792
Net Interest Income	113,745	88,812	317,591	255,332
Provision for loan losses	3,194	3,327	8,707	7,938
Net interest income after provision for loan losses	110,551	85,485	308,884	247,394
Non-Interest Income
Service charges and other fees	19,504	17,307	55,179	50,435
Miscellaneous loan fees and charges	1,807	1,211	5,527	3,283
Gain on sale of loans	7,256	9,141	21,495	23,031
(Loss) gain on sale of debt securities	(367)	77	(756)	(545)
Other income	4,216	3,449	8,885	8,326
Total non-interest income	32,416	31,185	90,330	84,530
Non-Interest Expense
Compensation and employee benefits	49,927	41,297	144,671	120,041
Occupancy and equipment	7,914	6,500	22,850	19,706
Advertising and promotions	2,432	2,239	7,132	6,381
Data processing	3,752	3,647	11,960	10,180
Other real estate owned	2,674	817	2,957	1,532
Regulatory assessments and insurance	1,277	1,214	3,812	3,362
Core deposit intangibles amortization	1,735	640	4,539	1,880
Other expenses	13,118	12,198	40,330	34,123
Total non-interest expense	82,829	68,552	238,251	197,205
Income Before Income Taxes	60,138	48,118	160,963	134,719
Federal and state income tax expense	10,802	11,639	28,684	33,298
Net Income	$ 49,336	$ 36,479	$ 132,279	$ 101,421
Basic earnings per share	$ 0.58	$ 0.47	$ 1.59	$ 1.31
Diluted earnings per share	0.58	0.47	1.59	1.31
Dividends declared per share	$ 0.26	$ 0.51	$ 0.75	$ 0.93
Average outstanding shares - basic	84,518,407	78,004,450	83,294,111	77,379,514
Average outstanding shares - diluted	84,593,122	78,065,942	83,362,323	77,442,944

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 49,336	$ 36,479	$ 132,279	$ 101,421
Other Comprehensive (Loss) Income, Net of Tax
Unrealized (losses) gains on available-for-sale debt securities	(14,190)	(2,835)	(46,597)	17,172
Reclassification adjustment for (losses) gains included in net income	(151)	(77)	195	519
Net unrealized (losses) gains on available-for-sale debt securities	(14,341)	(2,912)	(46,402)	17,691
Tax effect	3,634	1,129	11,759	(6,853)
Net of tax amount	(10,707)	(1,783)	(34,643)	10,838
Unrealized gains (losses) on derivatives used for cash flow hedges	1,234	45	7,302	(1,799)
Reclassification adjustment for losses included in net income	469	1,182	1,946	3,776
Net unrealized gains on derivatives used for cash flow hedges	1,703	1,227	9,248	1,977
Tax effect	(431)	(476)	(2,343)	(766)
Net of tax amount	1,272	751	6,905	1,211
Total other comprehensive (loss) income, net of tax	(9,435)	(1,032)	(27,738)	12,049
Total Comprehensive Income	$ 39,901	$ 35,447	$ 104,541	$ 113,470

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings Substantially Restricted	Accumulated Other Comprehensive (Loss) Income
Balance, beginning, shares at Dec. 31, 2016		76,525,402
Balance, beginning at Dec. 31, 2016	$ 1,116,869	$ 765	$ 749,107	$ 374,379	$ (7,382)
Net income	101,421			101,421
Other comprehensive income (loss)	12,049				12,049
Cash dividends declared	(72,427)			(72,427)
Stock issued in connection with acquisitions, shares		1,381,661
Stock issued in connection with acquisitions, amount	46,673	$ 14	46,659
Stock issuances under stock incentive plans, shares		99,893
Stock issuances under stock incentive plans, value	0	$ 1	(1)
Stock-based compensation and related taxes	1,616		1,616
Balance, ending, shares at Sep. 30, 2017		78,006,956
Balance, ending at Sep. 30, 2017	$ 1,206,201	$ 780	797,381	403,373	4,667
Balance, beginning, shares at Dec. 31, 2017	78,006,956	78,006,956
Balance, beginning at Dec. 31, 2017	$ 1,199,057	$ 780	797,997	402,259	(1,979)
Net income	132,279			132,279
Other comprehensive income (loss)	(27,738)				(27,738)
Cash dividends declared	(63,517)			(63,517)
Stock issued in connection with acquisitions, shares		6,432,868
Stock issued in connection with acquisitions, amount	250,807	$ 64	250,743
Stock issuances under stock incentive plans, shares		81,269
Stock issuances under stock incentive plans, value	0	$ 1	(1)
Stock-based compensation and related taxes	$ 1,724		1,724
Balance, ending, shares at Sep. 30, 2018	84,521,093	84,521,093
Balance, ending at Sep. 30, 2018	$ 1,492,612	$ 845	$ 1,050,463	$ 471,021	$ (29,717)

Unaudited Condensed Consolida_6

Unaudited Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash dividends declared per share	$ 0.75	$ 0.93
Retained Earnings Substantially Restricted
Cash dividends declared per share	$ 0.75	$ 0.93

Unaudited Condensed Consolida_7

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating Activities
Net income	$ 132,279	$ 101,421
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	8,707	7,938
Net amortization of debt securities	10,088	16,265
Net accretion of purchase accounting adjustments	(2,962)	(4,534)
Amortization of debt modification costs	1,237	0
Origination of loans held for sale	(647,932)	(672,055)
Proceeds from loans held for sale	669,344	730,082
Gain on sale of loans	(21,495)	(23,031)
Loss on sale of debt securities	756	545
Bank-owned life insurance income, net	(1,782)	(1,032)
Stock-based compensation, net of tax benefits	2,523	1,449
Depreciation of premises and equipment	11,543	10,989
Loss (gain) on sale and write-downs of other real estate owned, net	2,347	(1,808)
Amortization of core deposit intangibles	4,539	1,880
Amortization of investments in variable interest entities	5,070	3,581
Net increase in accrued interest receivable	(10,581)	(3,564)
Net (increase) decrease in other assets	(6,820)	6,147
Net increase (decrease) in accrued interest payable	170	(431)
Net increase in other liabilities	10,481	4,609
Net cash provided by operating activities	167,512	178,451
Investing Activities
Sales of available-for-sale debt securities	224,612	247,748
Maturities, prepayments and calls of available-for-sale debt securities	259,102	347,450
Purchases of available-for-sale debt securities	(550,096)	(28,301)
Maturities, prepayments and calls of held-to-maturity debt securities	55,202	18,910
Principal collected on loans	1,908,670	1,472,757
Loan originations	(2,500,098)	(2,022,508)
Net additions to premises and equipment	(13,984)	(7,682)
Proceeds from sale of other real estate owned	3,370	11,812
Proceeds from redemption of non-marketable equity securities	73,199	47,805
Purchases of non-marketable equity securities	(62,585)	(42,598)
Proceeds from bank-owned life insurance	1,331	437
Investments in variable interest entities	(30,685)	(16,541)
Net cash received from (paid in) acquisitions	101,268	(4,091)
Net cash (used in) provided by investing activities	(530,694)	25,198
Financing Activities
Net increase in deposits	706,469	98,013
Net increase (decrease) in securities sold under agreements to repurchase	17,001	(20,054)
Net decrease in short-term Federal Home Loan Bank advances	(200,000)	(62,800)
Proceeds from long-term Federal Home Loan Bank advances	0	150,000
Repayments of long-term Federal Home Loan Bank advances	(641)	(208,097)
Net (decrease) increase in other borrowed funds	(9,823)	3,803
Cash dividends paid	(41,542)	(95,332)
Tax withholding payments for stock-based compensation	(1,182)	(1,513)
Net cash provided by (used in) financing activities	470,282	(135,980)
Net increase in cash, cash equivalents and restricted cash	107,100	67,669
Cash, cash equivalents and restricted cash at beginning of period	200,004	152,541
Cash, cash equivalents and restricted cash at end of period	307,104	220,210
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest	25,925	23,223
Cash paid during the period for income taxes	18,440	29,315
Supplemental Disclosure of Non-Cash Investing Activities
Sale and refinancing of other real estate owned	406	531
Transfer of loans to other real estate owned	4,066	3,844
Dividends declared but not paid	22,240	232
Fair value of common stock shares issued	250,807	46,673
Cash consideration for outstanding shares	16,265	17,342
Effective settlement of a pre-existing relationship	10,054	0
Fair Value of Assets Acquired	1,549,158	355,230
Liabilities Assumed	$ 1,383,756	$ 321,824

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Summary of Significant Accounting Policies	Nature of Operations and Summary of Significant Accounting Policies General Glacier Bancorp, Inc. (“Company”) is a Montana corporation headquartered in Kalispell, Montana. The Company provides a full range of banking services to individuals and businesses in Montana, Idaho, Utah, Washington, Wyoming, Colorado and Arizona through its wholly-owned bank subsidiary, Glacier Bank (“Bank”). The Company offers a wide range of banking products and services, including: 1) retail banking; 2) business banking; 3) real estate, commercial, agriculture and consumer loans; and 4) mortgage origination services. The Company serves individuals, small to medium-sized businesses, community organizations and public entities. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the Company’s financial condition as of September 30, 2018 , the results of operations and comprehensive income for the three and nine month periods ended September 30, 2018 and 2017 , and changes in stockholders’ equity and cash flows for the nine month periods ended September 30, 2018 and 2017 . The condensed consolidated statement of financial condition of the Company as of December 31, 2017 has been derived from the audited consolidated statements of the Company as of that date. The accompanying unaudited condensed consolidated financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America (“GAAP”) for complete financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 . Operating results for the nine months ended September 30, 2018 are not necessarily indicative of the results anticipated for the year ending December 31, 2018 . The Company is a defendant in legal proceedings arising in the normal course of business. In the opinion of management, the disposition of pending litigation will not have a material affect on the Company’s consolidated financial position, results of operations or liquidity. Material estimates that are particularly susceptible to significant change include: 1) the determination of the allowance for loan and lease losses (“ALLL” or “allowance”); 2) the valuation of debt securities; 3) the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans; and 4) the evaluation of goodwill impairment. For the determination of the ALLL and real estate valuation estimates, management obtains independent appraisals (new or updated) for significant items. Estimates relating to investment valuations are obtained from independent third parties. Estimates relating to the evaluation of goodwill for impairment are determined based on internal calculations using significant independent party inputs. Principles of Consolidation The consolidated financial statements of the Company include the parent holding company and the Bank. The Bank consists of fourteen bank divisions, a treasury division, an information technology division and a centralized mortgage division. The treasury division includes the Bank’s investment portfolio and wholesale borrowings, the information technology division includes the Bank’s internal data processing, and the centralized mortgage division includes mortgage loan servicing and secondary market sales. The Bank divisions operate under separate names, management teams and advisory directors. The Company considers the Bank to be its sole operating segment as the Bank 1) engages in similar bank business activity from which it earns revenues and incurs expenses; 2) the operating results of the Bank are regularly reviewed by the Chief Executive Officer (“CEO”) (i.e., the chief operating decision maker) who makes decisions about resources to be allocated to the Bank; and 3) financial information is available for the Bank. All significant inter-company transactions have been eliminated in consolidation. The Bank has subsidiary interests in variable interest entities (“VIE”) for which the Bank has both the power to direct the VIE’s significant activities and the obligation to absorb losses or right to receive benefits of the VIE that could potentially be significant to the VIE. These subsidiary interests are included in the Company’s consolidated financial statements. The Bank also has subsidiary interests in VIEs for which the Bank does not have a controlling financial interest and is not the primary beneficiary. These subsidiary interests are not included in the Company’s consolidated financial statements. The parent holding company owns non-bank subsidiaries that have issued trust preferred securities as Tier 1 capital instruments. The trust subsidiaries are not included in the Company’s consolidated financial statements. The Company's investments in the trust subsidiaries are included in other assets on the Company's statements of financial condition. In February 2018, the Company completed its acquisition of Inter-Mountain Bancorp., Inc. and its wholly-owned subsidiary, First Security Bank, a community bank based in Bozeman, Montana (collectively, “FSB”). In January 2018, the Company completed its acquisition of Columbine Capital Corp., and its wholly-owned subsidiary, Collegiate Peaks Bank, a community bank based in Buena Vista, Colorado (collectively, “Collegiate”). The transactions were accounted for using the acquisition method, and their results of operations have been included in the Company’s consolidated financial statements as of the acquisition dates. For additional information relating to recent mergers and acquisitions, see Note 12. Loans Receivable Loans that are intended to be held-to-maturity are reported at the unpaid principal balance less net charge-offs and adjusted for deferred fees and costs on originated loans and unamortized premiums or discounts on acquired loans. Fees and costs on originated loans and premiums or discounts on acquired loans are deferred and subsequently amortized or accreted as a yield adjustment over the expected life of the loan utilizing the interest method. The objective of the interest method is to calculate periodic interest income at a constant effective yield. When a loan is paid off prior to maturity, the remaining fees and costs on originated loans and premiums or discounts on acquired loans are immediately recognized into interest income. The Company’s loan segments, which are based on the purpose of the loan, include residential real estate, commercial, and consumer loans. The Company’s loan classes, a further disaggregation of segments, include residential real estate loans (residential real estate segment), commercial real estate and other commercial loans (commercial segment), and home equity and other consumer loans (consumer segment). Loans that are thirty days or more past due based on payments received and applied to the loan are considered delinquent. Loans are designated non-accrual and the accrual of interest is discontinued when the collection of the contractual principal or interest is unlikely. A loan is typically placed on non-accrual when principal or interest is due and has remained unpaid for ninety days or more. When a loan is placed on non-accrual status, interest previously accrued but not collected is reversed against current period interest income. Subsequent payments on non-accrual loans are applied to the outstanding principal balance if doubt remains as to the ultimate collectability of the loan. Interest accruals are not resumed on partially charged-off impaired loans. For other loans on nonaccrual, interest accruals are resumed on such loans only when they are brought fully current with respect to interest and principal and when, in the judgment of management, the loans are estimated to be fully collectible as to both principal and interest. The Company considers impaired loans to be the primary credit quality indicator for monitoring the credit quality of the loan portfolio. Loans are designated impaired when, based upon current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement and, therefore, the Company has serious doubts as to the ability of such borrowers to fulfill the contractual obligation. Impaired loans include non-performing loans (i.e., non-accrual loans and accruing loans ninety days or more past due) and accruing loans under ninety days past due where it is probable payments will not be received according to the loan agreement (e.g., troubled debt restructuring). Interest income on accruing impaired loans is recognized using the interest method. The Company measures impairment on a loan-by-loan basis in the same manner for each class within the loan portfolio. An insignificant delay or shortfall in the amounts of payments would not cause a loan or lease to be considered impaired. The Company determines the significance of payment delays and shortfalls on a case-by-case basis, taking into consideration all of the facts and circumstances surrounding the loan and the borrower, including the length and reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest due. A restructured loan is considered a troubled debt restructuring (“TDR”) if the creditor, for economic or legal reasons related to the debtor’s financial difficulties, grants a concession to the debtor that it would not otherwise consider. The Company periodically enters into restructure agreements with borrowers whereby the loans were previously identified as TDRs. When such circumstances occur, the Company carefully evaluates the facts of the subsequent restructure to determine the appropriate accounting and under certain circumstances it may be acceptable not to account for the subsequently restructured loan as a TDR. When assessing whether a concession has been granted by the Company, any prior forgiveness on a cumulative basis is considered a continuing concession. A TDR loan is considered an impaired loan and a specific valuation allowance is established when the fair value of the collateral-dependent loan or present value of the loan’s expected future cash flows (discounted at the loan’s effective interest rate based on the original contractual rate) is lower than the carrying value of the impaired loan. The Company has made the following types of loan modifications, some of which were considered a TDR: • reduction of the stated interest rate for the remaining term of the debt; • extension of the maturity date(s) at a stated rate of interest lower than the current market rate for newly originated debt having similar risk characteristics; and • reduction of the face amount of the debt as stated in the debt agreements. The Company recognizes that while borrowers may experience deterioration in their financial condition, many continue to be creditworthy customers who have the willingness and capacity for debt repayment. In determining whether non-restructured or unimpaired loans issued to a single or related party group of borrowers should continue to accrue interest when the borrower has other loans that are impaired or are TDRs, the Company on a quarterly or more frequent basis performs an updated and comprehensive assessment of the willingness and capacity of the borrowers to timely and ultimately repay their total debt obligations, including contingent obligations. Such analysis takes into account current financial information about the borrowers and financially responsible guarantors, if any, including for example: • analysis of global, i.e., aggregate debt service for total debt obligations; • assessment of the value and security protection of collateral pledged using current market conditions and alternative market assumptions across a variety of potential future situations; and • loan structures and related covenants. For additional information relating to loans, see Note 3. Allowance for Loan and Lease Losses Based upon management’s analysis of the Company’s loan portfolio, the balance of the ALLL is an estimate of probable credit losses known and inherent within the Bank’s loan portfolio as of the date of the consolidated financial statements. The ALLL is analyzed at the loan class level and is maintained within a range of estimated losses. Determining the adequacy of the ALLL involves a high degree of judgment and is inevitably imprecise as the risk of loss is difficult to quantify. The determination of the ALLL and the related provision for loan losses is a critical accounting estimate that involves management’s judgments about known relevant internal and external environmental factors that affect loan losses. The balance of the ALLL is highly dependent upon management’s evaluations of borrowers’ current and prospective performance, appraisals and other variables affecting the quality of the loan portfolio. Individually significant loans and major lending areas are reviewed periodically to determine potential problems at an early date. Changes in management’s estimates and assumptions are reasonably possible and may have a material impact upon the Company’s consolidated financial statements, results of operations or capital. Risk characteristics considered in the ALLL analysis applicable to each loan class within the Company's loan portfolio are as follows: Residential Real Estate. Residential real estate loans are secured by owner-occupied 1-4 family residences. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers. Credit risk in these loans is impacted by economic conditions within the Company’s market areas that affect the value of the property securing the loans and affect the borrowers' personal incomes. Mitigating risk factors for this loan class include a large number of borrowers, geographic dispersion of market areas and the loans are originated for relatively smaller amounts. Commercial Real Estate . Commercial real estate loans typically involve larger principal amounts, and repayment of these loans is generally dependent on the successful operation of the property securing the loan and/or the business conducted on the property securing the loan. Credit risk in these loans is impacted by the creditworthiness of a borrower, valuation of the property securing the loan and conditions within the local economies in the Company’s diverse, geographic market areas. Commercial . Commercial loans consist of loans to commercial customers for use in financing working capital needs, equipment purchases and business expansions. The loans in this category are repaid primarily from the cash flow of a borrower’s principal business operation. Credit risk in these loans is driven by creditworthiness of a borrower and the economic conditions that impact the cash flow stability from business operations across the Company’s diverse, geographic market areas. Home Equity . Home equity loans consist of junior lien mortgages and first and junior lien lines of credit (revolving open-end and amortizing closed-end) secured by owner-occupied 1-4 family residences. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers. Credit risk in these loans is impacted by economic conditions within the Company’s market areas that affect the value of the residential property securing the loans and affect the borrowers' personal incomes. Mitigating risk factors for this loan class are a large number of borrowers, geographic dispersion of market areas and the loans are originated for terms that range from 10 to 15 years . Other Consumer . The other consumer loan portfolio consists of various short-term loans such as automobile loans and loans for other personal purposes. Repayment of these loans is primarily dependent on the personal income of the borrowers. Credit risk is driven by consumer economic factors (such as unemployment and general economic conditions in the Company’s diverse, geographic market area) and the creditworthiness of a borrower. The ALLL consists of a specific valuation allowance component and a general valuation allowance component. The specific component relates to loans that are determined to be impaired and individually evaluated for impairment. The Company measures impairment on a loan-by-loan basis based on the present value of expected future cash flows discounted at the loan’s effective interest rate, except when it is determined that repayment of the loan is expected to be provided solely by the underlying collateral. For impairment based on expected future cash flows, the Company considers all information available as of a measurement date, including past events, current conditions, potential prepayments, and estimated cost to sell when such costs are expected to reduce the cash flows available to repay or otherwise satisfy the loan. For alternative ranges of cash flows, the likelihood of the possible outcomes is considered in determining the best estimate of expected future cash flows. The effective interest rate for a loan restructured in a TDR is based on the original contractual rate. For collateral-dependent loans and real estate loans for which foreclosure or a deed-in-lieu of foreclosure is probable, impairment is measured by the fair value of the collateral, less estimated cost to sell. The fair value of the collateral is determined primarily based upon appraisal or evaluation of the underlying real property value. The general valuation allowance component relates to probable credit losses inherent in the balance of the loan portfolio based on historical loss experience, adjusted for changes in trends and conditions of qualitative or environmental factors. The historical loss experience is based on the previous twelve quarters loss experience by loan class adjusted for risk characteristics in the existing loan portfolio. The same trends and conditions are evaluated for each class within the loan portfolio; however, the risk characteristics are weighted separately at the individual class level based on the Company’s judgment and experience. The changes in trends and conditions evaluated for each class within the loan portfolio include the following: • changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off, and recovery practices not considered elsewhere in estimating credit losses; • changes in global, national, regional, and local economic and business conditions and developments that affect the collectability of the portfolio, including the condition of various market segments; • changes in the nature and volume of the portfolio and in the terms of loans; • changes in experience, ability, and depth of lending management and other relevant staff; • changes in the volume and severity of past due and nonaccrual loans; • changes in the quality of the Company’s loan review system; • changes in the value of underlying collateral for collateral-dependent loans; • the existence and effect of any concentrations of credit, and changes in the level of such concentrations; and • the effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the Company’s existing portfolio. The ALLL is increased by provisions for loan losses which are charged to expense. The portions of loan and overdraft balances determined by management to be uncollectible are charged off as a reduction of the ALLL and recoveries of amounts previously charged off are credited as an increase to the ALLL. The Company’s charge-off policy is consistent with bank regulatory standards. Consumer loans generally are charged off when the loan becomes over 120 days delinquent. Real estate acquired as a result of foreclosure or by deed-in-lieu of foreclosure is classified as other real estate owned (“OREO”) until such time as it is sold. At acquisition date, the assets and liabilities of acquired banks are recorded at their estimated fair values which results in no ALLL carried over from acquired banks. Subsequent to acquisition, an allowance will be recorded on the acquired loan portfolios for further credit deterioration, if any. Revenue Recognition The Company recognizes revenue when services or products are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled. The Company’s principal source of revenue is interest income from debt securities and loans. Revenue from contracts with customers within the scope of Accounting Standards Codification ™ (“ASC”) Topic 606 was $56,519,000 and $52,058,000 for the nine months ended September 30, 2018 and 2017 , respectively, and largely consisted of revenue from service charges and other fees from deposits (e.g., overdraft fees, ATM fees, debit card fees). Due to the short-term nature of the Company’s contracts with customers, an insignificant amount of receivables related to such revenue was recorded at September 30, 2018 and December 31, 2017 and there were no impairment losses recognized. Policies specific to revenue from contracts with customers include the following: Service Charges. Revenue from service charges consists of service charges and fees on deposit accounts under depository agreements with customers to provide access to deposited funds and, when applicable, pay interest on deposits. Service charges on deposit accounts may be transactional or non-transactional in nature. Transactional service charges occur in the form of a service or penalty and are charged upon the occurrence of an event (e.g., overdraft fees, ATM fees, wire transfer fees). Transactional service charges are recognized as services are delivered to and consumed by the customer, or as penalty fees are charged. Non-transactional service charges are charges that are based on a broader service, such as account maintenance fees and dormancy fees, and are recognized on a monthly basis. Debit Card Fees. Revenue from debit card fees includes interchange fee income from debit cards processed through card association networks. Interchange fees represent a portion of a transaction amount that the Company and other involved parties retain to compensate themselves for giving the cardholder immediate access to funds. Interchange rates are generally set by the card association networks and are based on purchase volumes and other factors. The Company records interchange fees as services are provided. Accounting Guidance Adopted in 2018 The ASC is the Financial Accounting Standards Board’s (“FASB”) officially recognized source of authoritative GAAP applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the Securities and Exchange Commission (“SEC”) under the authority of the federal securities laws are also sources of authoritative GAAP for the Company as an SEC registrant. All other accounting literature is non-authoritative. The following paragraphs provide descriptions of recently adopted accounting standards that may have had a material effect on the Company’s financial position or results of operations. Financial Instruments. In January 2016, FASB amended ASC Topic 825 to address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The amendments were effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2017. Amendments were to be applied by means of a cumulative-effect adjustment to the Company’s statements of financial condition as of the beginning of the reporting year of adoption. The amendments impacted the Company as follows: 1) equity investments (with certain exclusions) are to be measured at fair value with the changes recognized in net income; 2) an exit price must be utilized when measuring the fair value of financial instruments; and 3) additional disclosures are required relating to other comprehensive income (“OCI”), the evaluation of a valuation allowance on a deferred tax asset related to available-for-sale debt securities in combination with the entity’s other deferred tax assets, and other disclosures. The Company adopted the amendments effective January 1, 2018 and determined that the impact of these amendments did not have a significant impact on the Company’s equity securities, fair value disclosures, financial position or results of operations. The amendments changed the method utilized to disclose the fair value of the loan portfolio to an exit price notion when measuring fair value. The Company developed processes to comply with the disclosure requirements of such amendments and accounting policies and procedures were updated accordingly. For additional information on fair value of assets and liabilities, see Note 11. Revenue Recognition. In May 2014, FASB amended ASC Topic 606 to clarify the principles for recognizing revenue and develop a common revenue standard among industries. The new guidance established the following core principle: recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for goods or services. Five steps were provided for a company or organization to follow to achieve such core principle. The new guidance also included a cohesive set of disclosure requirements that provided users of financial statements with comprehensive information about the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The Company adopted the new revenue recognition guidance effective January 1, 2018 and determined the majority of the Company’s revenue sources, such as interest income from debt securities and loans, fee income from loans and gain on sale of loans, were not within the scope of Topic 606. The Company evaluated the revenue sources determined to be in scope of Topic 606, including service charges and fee income on deposits and gain or loss on sale of OREO and determined the adoption of the guidance did not have a significant impact to the Company’s financial position or results of operations; however, OREO policies and procedures were updated and implemented and new disclosures about the Company’s revenue have been incorporated into the notes to the financial statements. Accounting Guidance Pending Adoption at September 30, 2018 The following paragraphs provide descriptions of newly issued but not yet effective accounting standards that could have a material effect on the Company’s financial position or results of operations. Derivatives and Hedging. In August 2017, FASB amended ASC Topic 815 to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. In addition, the amendments made targeted improvements to simplify the application of the hedge accounting guidance. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently evaluating the full impact of the amendments on its existing interest rate swaps and whether it will early adopt. The Company does not expect there to be an impact to the Company’s financial position and results of operations, although, there may be additional financial statement disclosures. The accounting policies and procedures will be modified after the Company has fully evaluated the standard, although significant changes are not expected. For additional information on derivatives, see Note 7. Receivables - Nonrefundable Fees and Other Costs. In March 2017, FASB amended ASC Subtopic 310-20 to shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date instead of the maturity date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2018. Early adoption is permitted and if adopted in an interim period, any adjustments should be reflected as of the beginning of the year that includes the interim period. The entity should apply the amendments on a modified retrospective basis through a cumulative-effective adjustment directly to retained earnings as of the beginning of the period of adoption. The Company has premiums on debt securities that are currently being amortized to the maturity date, primarily in the state and local governments category. If the Company were to adopt these amendments as of October 1, 2018, the Company estimates that $22,612,000 of the premium associated with debt securities would be adjusted to retained earnings. The Company is currently reviewing the amendments to ensure it is fully compliant by the adoption date, including accounting policies and procedures, and doesn’t expect to early adopt. Goodwill and Other Intangibles. In January 2017, FASB amended ASC Topic 350 to simplify the measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Instead, under these amendments, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss should not exceed the total amount of goodwill allocated to that reporting unit. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company has goodwill from prior business combinations and performs an annual impairment test or more frequently if changes or circumstances occur that would more-likely-than-not reduce the fair value of the reporting unit below its carrying value. During the third quarter of 2018, the Company performed its impairment assessment and determined the fair value of the aggregated reporting units exceeded the carrying value, such that the Company’s goodwill was not considered impaired. Although the Company cannot anticipate future goodwill impairment assessments, based on the most recent assessment, it is unlikely that an impairment amount would need to be calculated and, therefore, the Company does not anticipate a material impact from these amendments to the Company’s financial position and results of operations. The current accounting policies and processes are not anticipated to change, except for the elimination of the Step 2 analysis. For additional information regarding goodwill impairment testing, see Note 4. Financial Instruments. In June 2016, FASB amended ASC Topic 326 to replace the incurred loss model with a methodology that reflects expected credit losses over the life of the loan and requires consideration of a broader range of reasonable and supportable information to calculate credit loss estimates. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2019. The Company is currently evaluating the impact of these amendments to the Company’s financial position and results of operations and currently does not know or cannot reasonably quantify the impact of the adoption of the amendments as a result of the complexity and extensive changes from the amendments. The ALLL is a material estimate of the Company and given the change from an incurred loss model to a methodology that considers the credit loss over the life of the loan, there is the potential for an increase in the ALLL at adoption date. The Company is anticipating a significant change in the processes and procedures to calculate the ALLL, including changes in assumptions and estimates to consider expected credit losses over the life of the loan versu

Debt Securities

Debt Securities	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Debt Securities	Debt Securities The following tables present the amortized cost, the gross unrealized gains and losses and the fair value of the Company’s debt securities: September 30, 2018 Amortized Cost Gross Unrealized Fair Value (Dollars in thousands) Gains Losses Available-for-sale U.S. government and federal agency $ 25,363 64 (160 ) 25,267 U.S. government sponsored enterprises 120,498 — (1,948 ) 118,550 State and local governments 647,908 10,040 (13,934 ) 644,014 Corporate bonds 306,057 696 (1,528 ) 305,225 Residential mortgage-backed securities 855,183 183 (29,202 ) 826,164 Commercial mortgage-backed securities 188,273 — (3,874 ) 184,399 Total available-for-sale 2,143,282 10,983 (50,646 ) 2,103,619 Held-to-maturity State and local governments 590,915 7,482 (14,840 ) 583,557 Total held-to-maturity 590,915 7,482 (14,840 ) 583,557 Total debt securities $ 2,734,197 18,465 (65,486 ) 2,687,176 December 31, 2017 Amortized Cost Gross Unrealized Fair Value (Dollars in thousands) Gains Losses Available-for-sale U.S. government and federal agency $ 31,216 54 (143 ) 31,127 U.S. government sponsored enterprises 19,195 — (104 ) 19,091 State and local governments 614,366 20,299 (5,164 ) 629,501 Corporate bonds 216,443 802 (483 ) 216,762 Residential mortgage-backed securities 785,960 1,253 (7,930 ) 779,283 Commercial mortgage-backed securities 104,324 25 (1,870 ) 102,479 Total available-for-sale 1,771,504 22,433 (15,694 ) 1,778,243 Held-to-maturity State and local governments 648,313 20,346 (8,573 ) 660,086 Total held-to-maturity 648,313 20,346 (8,573 ) 660,086 Total debt securities $ 2,419,817 42,779 (24,267 ) 2,438,329 The following table presents the amortized cost and fair value of available-for-sale and held-to-maturity debt securities by contractual maturity at September 30, 2018 . Actual maturities may differ from expected or contractual maturities since issuers have the right to prepay obligations with or without prepayment penalties. September 30, 2018 Available-for-Sale Held-to-Maturity (Dollars in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 151,030 150,658 — — Due after one year through five years 322,470 319,836 4,551 4,555 Due after five years through ten years 284,496 285,279 108,553 106,980 Due after ten years 341,830 337,283 477,811 472,022 1,099,826 1,093,056 590,915 583,557 Mortgage-backed securities 1 1,043,456 1,010,563 — — Total $ 2,143,282 2,103,619 590,915 583,557 ______________________________ 1 Mortgage-backed securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds. Proceeds from sales and calls of debt securities and the associated gains and losses that have been included in earnings are listed below: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Available-for-sale Proceeds from sales and calls of debt securities $ 12,135 155,894 245,581 268,557 Gross realized gains 1 188 278 203 3,345 Gross realized losses 1 (37 ) (201 ) (398 ) (3,864 ) Held-to-maturity Proceeds from calls of debt securities 28,435 3,675 57,370 18,910 Gross realized gains 1 12 — 76 153 Gross realized losses 1 (530 ) — (637 ) (179 ) ______________________________ 1 The gain or loss on the sale or call of each debt security is determined by the specific identification method. Debt securities with an unrealized loss position are summarized as follows: September 30, 2018 Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Available-for-sale U.S. government and federal agency $ 6,553 (28 ) 8,887 (132 ) 15,440 (160 ) U.S. government sponsored enterprises 112,590 (1,791 ) 5,960 (157 ) 118,550 (1,948 ) State and local governments 215,703 (4,959 ) 145,908 (8,975 ) 361,611 (13,934 ) Corporate bonds 173,308 (820 ) 60,862 (708 ) 234,170 (1,528 ) Residential mortgage-backed securities 328,829 (6,397 ) 471,471 (22,805 ) 800,300 (29,202 ) Commercial mortgage-backed securities 104,099 (1,240 ) 74,278 (2,634 ) 178,377 (3,874 ) Total available-for-sale $ 941,082 (15,235 ) 767,366 (35,411 ) 1,708,448 (50,646 ) Held-to-maturity State and local governments $ 201,181 (6,234 ) 90,502 (8,606 ) 291,683 (14,840 ) Total held-to-maturity $ 201,181 (6,234 ) 90,502 (8,606 ) 291,683 (14,840 ) December 31, 2017 Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Available-for-sale U.S. government and federal agency $ 1,208 (5 ) 13,179 (138 ) 14,387 (143 ) U.S. government sponsored enterprises 14,926 (56 ) 3,425 (48 ) 18,351 (104 ) State and local governments 61,126 (689 ) 121,181 (4,475 ) 182,307 (5,164 ) Corporate bonds 99,636 (264 ) 29,034 (219 ) 128,670 (483 ) Residential mortgage-backed securities 372,175 (3,050 ) 254,721 (4,880 ) 626,896 (7,930 ) Commercial mortgage-backed securities 37,650 (469 ) 62,968 (1,401 ) 100,618 (1,870 ) Total available-for-sale $ 586,721 (4,533 ) 484,508 (11,161 ) 1,071,229 (15,694 ) Held-to-maturity State and local governments $ 21,207 (186 ) 105,486 (8,387 ) 126,693 (8,573 ) Total held-to-maturity $ 21,207 (186 ) 105,486 (8,387 ) 126,693 (8,573 ) Based on an analysis of its debt securities with unrealized losses as of September 30, 2018 and December 31, 2017 , the Company determined that none of such securities had other-than-temporary impairment and the unrealized losses were primarily the result of interest rate changes and market spreads subsequent to acquisition. The fair value of the debt securities is expected to recover as payments are received and the securities approach maturity. At September 30, 2018 , management determined that it did not intend to sell debt securities with unrealized losses, and there was no expected requirement to sell any of its debt securities with unrealized losses before recovery of their amortized cost.

Loans Receivable, Net

Loans Receivable, Net	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Loans Receivable, Net	Loans Receivable, Net The Company’s loan portfolio is comprised of three segments: residential real estate, commercial, and consumer and other loans. The loan segments are further disaggregated into the following classes: residential real estate, commercial real estate, other commercial, home equity and other consumer loans. The following table presents loans receivable for each portfolio class of loans: At or for the Nine Months ended At or for the Year ended (Dollars in thousands) September 30, December 31, Residential real estate loans $ 862,830 720,728 Commercial loans Real estate 4,527,577 3,577,139 Other commercial 1,921,955 1,579,353 Total 6,449,532 5,156,492 Consumer and other loans Home equity 528,404 457,918 Other consumer 282,479 242,686 Total 810,883 700,604 Loans receivable 8,123,245 6,577,824 Allowance for loan and lease losses (132,535 ) (129,568 ) Loans receivable, net $ 7,990,710 6,448,256 Net deferred origination (fees) costs included in loans receivable $ (4,876 ) (2,643 ) Net purchase accounting (discounts) premiums included in loans receivable $ (26,601 ) (16,325 ) Weighted-average interest rate on loans (tax-equivalent) 4.94 % 4.81 % The following tables summarize the activity in the ALLL by loan class: Three Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 131,564 10,903 71,245 38,664 6,092 4,660 Provision for loan losses 3,194 54 2,922 (257 ) (165 ) 640 Charge-offs (4,294 ) (210 ) (909 ) (897 ) (82 ) (2,196 ) Recoveries 2,071 7 308 447 83 1,226 Balance at end of period $ 132,535 10,754 73,566 37,957 5,928 4,330 Three Months ended September 30, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 129,877 11,522 68,503 36,984 7,662 5,206 Provision for loan losses 3,327 (10 ) 2,214 696 (682 ) 1,109 Charge-offs (5,983 ) (44 ) (3,227 ) (374 ) (15 ) (2,323 ) Recoveries 2,355 12 735 514 16 1,078 Balance at end of period $ 129,576 11,480 68,225 37,820 6,981 5,070 Nine Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 129,568 10,798 68,515 39,303 6,204 4,748 Provision for loan losses 8,707 135 5,941 415 (359 ) 2,575 Charge-offs (11,905 ) (257 ) (2,132 ) (3,325 ) (101 ) (6,090 ) Recoveries 6,165 78 1,242 1,564 184 3,097 Balance at end of period $ 132,535 10,754 73,566 37,957 5,928 4,330 Nine Months ended September 30, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 129,572 12,436 65,773 37,823 7,572 5,968 Provision for loan losses 7,938 (946 ) 6,403 551 (324 ) 2,254 Charge-offs (14,801 ) (87 ) (5,261 ) (1,855 ) (458 ) (7,140 ) Recoveries 6,867 77 1,310 1,301 191 3,988 Balance at end of period $ 129,576 11,480 68,225 37,820 6,981 5,070 The following tables disclose the recorded investment in loans and the balance in the ALLL by loan class: September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Loans receivable Individually evaluated for impairment $ 123,576 14,007 81,170 21,973 3,569 2,857 Collectively evaluated for impairment 7,999,669 848,823 4,446,407 1,899,982 524,835 279,622 Total loans receivable $ 8,123,245 862,830 4,527,577 1,921,955 528,404 282,479 ALLL Individually evaluated for impairment $ 1,690 83 650 687 5 265 Collectively evaluated for impairment 130,845 10,671 72,916 37,270 5,923 4,065 Total ALLL $ 132,535 10,754 73,566 37,957 5,928 4,330 December 31, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Loans receivable Individually evaluated for impairment $ 119,994 12,399 77,536 23,032 3,755 3,272 Collectively evaluated for impairment 6,457,830 708,329 3,499,603 1,556,321 454,163 239,414 Total loans receivable $ 6,577,824 720,728 3,577,139 1,579,353 457,918 242,686 ALLL Individually evaluated for impairment $ 5,223 246 500 3,851 56 570 Collectively evaluated for impairment 124,345 10,552 68,015 35,452 6,148 4,178 Total ALLL $ 129,568 10,798 68,515 39,303 6,204 4,748 Substantially all of the Company’s loans receivable are with customers in the Company’s geographic market areas. Although the Company has a diversified loan portfolio, a substantial portion of its customers’ ability to honor their obligations is dependent upon the economic performance in the Company’s market areas. The following tables disclose information related to impaired loans by loan class: At or for the Three or Nine Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Loans with a specific valuation allowance Recorded balance $ 20,021 2,367 9,843 6,878 38 895 Unpaid principal balance 20,327 2,442 10,043 6,878 38 926 Specific valuation allowance 1,690 83 650 687 5 265 Average balance - three months 18,267 2,434 10,005 4,775 19 1,034 Average balance - nine months 19,599 2,868 8,286 7,034 72 1,339 Loans without a specific valuation allowance Recorded balance 103,555 11,640 71,327 15,095 3,531 1,962 Unpaid principal balance 125,552 12,845 88,290 18,245 4,110 2,062 Average balance - three months 113,734 10,783 76,027 21,604 3,560 1,760 Average balance - nine months 111,037 10,154 77,489 18,293 3,488 1,613 Total Recorded balance 123,576 14,007 81,170 21,973 3,569 2,857 Unpaid principal balance 145,879 15,287 98,333 25,123 4,148 2,988 Specific valuation allowance 1,690 83 650 687 5 265 Average balance - three months 132,001 13,217 86,032 26,379 3,579 2,794 Average balance - nine months 130,636 13,022 85,775 25,327 3,560 2,952 At or for the Year ended December 31, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Loans with a specific valuation allowance Recorded balance $ 17,689 2,978 4,545 8,183 186 1,797 Unpaid principal balance 18,400 3,046 4,573 8,378 199 2,204 Specific valuation allowance 5,223 246 500 3,851 56 570 Average balance 18,986 2,928 5,851 8,477 359 1,371 Loans without a specific valuation allowance Recorded balance 102,305 9,421 72,991 14,849 3,569 1,475 Unpaid principal balance 122,833 10,380 89,839 16,931 4,098 1,585 Average balance 107,945 9,834 76,427 15,129 4,734 1,821 Total Recorded balance 119,994 12,399 77,536 23,032 3,755 3,272 Unpaid principal balance 141,233 13,426 94,412 25,309 4,297 3,789 Specific valuation allowance 5,223 246 500 3,851 56 570 Average balance 126,931 12,762 82,278 23,606 5,093 3,192 Interest income recognized on impaired loans for the nine months ended September 30, 2018 and 2017 was not significant. The following tables present an aging analysis of the recorded investment in loans by loan class: September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Accruing loans 30-59 days past due $ 13,973 667 5,621 4,325 1,856 1,504 Accruing loans 60-89 days past due 11,208 6,242 989 2,049 1,015 913 Accruing loans 90 days or more past due 4,333 2,063 466 1,461 122 221 Non-accrual loans 55,373 7,855 34,267 9,833 2,924 494 Total past due and non-accrual loans 84,887 16,827 41,343 17,668 5,917 3,132 Current loans receivable 8,038,358 846,003 4,486,234 1,904,287 522,487 279,347 Total loans receivable $ 8,123,245 862,830 4,527,577 1,921,955 528,404 282,479 December 31, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Accruing loans 30-59 days past due $ 26,375 6,252 12,546 3,634 2,142 1,801 Accruing loans 60-89 days past due 11,312 794 5,367 3,502 987 662 Accruing loans 90 days or more past due 6,077 2,366 609 2,973 — 129 Non-accrual loans 44,833 4,924 27,331 8,298 3,338 942 Total past due and non-accrual loans 88,597 14,336 45,853 18,407 6,467 3,534 Current loans receivable 6,489,227 706,392 3,531,286 1,560,946 451,451 239,152 Total loans receivable $ 6,577,824 720,728 3,577,139 1,579,353 457,918 242,686 The following tables present TDRs that occurred during the periods presented and the TDRs that occurred within the previous twelve months that subsequently defaulted during the periods presented: Three Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer TDRs that occurred during the period Number of loans 2 — — 1 — 1 Pre-modification recorded balance $ 312 — — 7 — 305 Post-modification recorded balance $ 312 — — 7 — 305 TDRs that subsequently defaulted Number of loans 1 1 — — — — Recorded balance $ 47 47 — — — — Three Months ended September 30, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer TDRs that occurred during the period Number of loans 5 1 1 3 — — Pre-modification recorded balance $ 956 317 386 253 — — Post-modification recorded balance $ 956 317 386 253 — — TDRs that subsequently defaulted Number of loans — — — — — — Recorded balance $ — — — — — — Nine Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer TDRs that occurred during the period Number of loans 22 3 8 8 2 1 Pre-modification recorded balance $ 21,582 666 12,901 7,458 252 305 Post-modification recorded balance $ 21,468 666 12,787 7,458 252 305 TDRs that subsequently defaulted Number of loans 1 1 — — — — Recorded balance $ 47 47 — — — — Nine Months ended September 30, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer TDRs that occurred during the period Number of loans 22 4 7 8 2 1 Pre-modification recorded balance $ 22,912 652 13,003 9,069 178 10 Post-modification recorded balance $ 20,230 652 10,321 9,069 178 10 TDRs that subsequently defaulted Number of loans 1 — — 1 — — Recorded balance $ 18 — — 18 — — The modifications for the TDRs that occurred during the nine months ended September 30, 2018 and 2017 included one or a combination of the following: an extension of the maturity date, a reduction of the interest rate or a reduction in the principal amount. In addition to the TDRs that occurred during the period provided in the preceding tables, the Company had TDRs with pre-modification loan balances of $5,782,000 and $5,152,000 for the nine months ended September 30, 2018 and 2017 , respectively, for which OREO was received in full or partial satisfaction of the loans. The majority of such TDRs were in commercial real estate and home equity for the nine months ended September 30, 2018 and 2017 , respectively. At September 30, 2018 and December 31, 2017 , the Company had $791,000 and $743,000 , respectively, of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process. At September 30, 2018 and December 31, 2017 , the Company had $2,559,000 and $893,000 , respectively, of OREO secured by residential real estate properties.

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill The following schedule discloses the changes in the carrying value of goodwill: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Net carrying value at beginning of period $ 289,535 177,811 177,811 147,053 Acquisitions — — 111,724 30,758 Net carrying value at end of period $ 289,535 177,811 289,535 177,811 The Company performed its annual goodwill impairment test during the third quarter of 2018 and determined the fair value of the aggregated reporting units exceeded the carrying value, such that the Company’s goodwill was not considered impaired. Changes in the economic environment, operations of the aggregated reporting units, or other factors could result in the decline in the fair value of the aggregated reporting units which could result in a goodwill impairment in the future. Accumulated impairment charges were $40,159,000 as of September 30, 2018 and December 31, 2017 . For additional information on goodwill related to acquisitions, see Note 12.

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Variable Interest Entities	Variable Interest Entities A VIE is a partnership, limited liability company, trust or other legal entity that meets one of the following criteria: 1) the entity’s equity investment at risk is not sufficient to permit the entity to finance its activities without additional subordinated financial support from other parties; 2) the holders of the equity investment at risk, as a group, lack the characteristics of a controlling financial interest; and 3) the voting rights of some holders of the equity investment at risk are disproportionate to their obligation to absorb losses or receive returns, and substantially all of the activities are conducted on behalf of the holder of equity investment at risk with disproportionately few voting rights. A VIE must be consolidated by the Company if it is deemed to be the primary beneficiary, which is the party involved with the VIE that has both: 1) the power to direct the activities of the VIE that most significantly affect the VIE’s economic performance; and 2) the obligation to absorb the losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. The Company’s VIEs are regularly monitored to determine if any reconsideration events have occurred that could cause the primary beneficiary status to change. A previously unconsolidated VIE is consolidated when the Company becomes the primary beneficiary. A previously consolidated VIE is deconsolidated when the Company ceases to be the primary beneficiary or the entity is no longer a VIE. Consolidated Variable Interest Entities The Company has equity investments in Certified Development Entities (“CDE”) which have received allocations of New Markets Tax Credits (“NMTC”). The NMTC program provides federal tax incentives to investors to make investments in distressed communities and promotes economic improvements through the development of successful businesses in these communities. The NMTC is available to investors over a seven -year period and is subject to recapture if certain events occur during such period. The maximum exposure to loss in the CDEs is the amount of equity invested and credit extended by the Company. However, the Company has credit protection in the form of indemnification agreements, guarantees, and collateral arrangements. The Company has evaluated the variable interests held by the Company in each CDE (NMTC) investment and determined the Company does not individually meet the characteristics of a primary beneficiary; however, the related-party group does meet the criteria as a group and substantially all of the activities of the CDEs either involve or are conducted on behalf of the Company. As a result, the Company is the primary beneficiary of the CDEs and their assets, liabilities, and results of operations are included in the Company’s consolidated financial statements. The primary activities of the CDEs are recognized in commercial loans interest income and other borrowed funds interest expense on the Company’s statements of operations and the federal income tax credit allocations from the investments are recognized in the Company’s statements of operations as a component of income tax expense. Such related cash flows are recognized in loans originated, principal collected on loans and change in other borrowed funds. The following table summarizes the carrying amounts of the consolidated VIEs’ assets and liabilities included in the Company’s statements of financial condition and are adjusted for intercompany eliminations. All assets presented can be used only to settle obligations of the consolidated VIEs and all liabilities presented consist of liabilities for which creditors and other beneficial interest holders therein have no recourse to the general credit of the Company. (Dollars in thousands) September 30, December 31, Assets Loans receivable $ 73,862 57,796 Accrued interest receivable 157 94 Other assets 41,811 15,885 Total assets $ 115,830 73,775 Liabilities Other borrowed funds $ 9,743 7,964 Accrued interest payable 14 1 Other liabilities 30 98 Total liabilities $ 9,787 8,063 Unconsolidated Variable Interest Entities The Company has equity investments in Low-Income Housing Tax Credit (“LIHTC”) partnerships with carrying values of $31,702,000 and $9,169,000 as of September 30, 2018 and December 31, 2017 , respectively. The LIHTCs are indirect federal subsidies to finance low-income housing and are used in connection with both newly constructed and renovated residential rental buildings. Once a project is placed in service, it is generally eligible for the tax credit for ten consecutive years. To continue generating the tax credit and to avoid tax credit recapture, a LIHTC building must satisfy specific low-income housing compliance rules for a full fifteen -year period. The maximum exposure to loss in the VIEs is the amount of equity invested and credit extended by the Company. However, the Company has credit protection in the form of indemnification agreements, guarantees, and collateral arrangements. The Company has evaluated the variable interests held by the Company in each LIHTC investment and determined that the Company does not have controlling financial interests in such investments, and is not the primary beneficiary. The Company reports the investments in the unconsolidated LIHTCs as other assets on the Company’s statements of financial condition. Total unfunded contingent commitments related to the Company’s LIHTC investments totaled $10,293,000 at September 30, 2018 , of which $3,856,000 is expected to be fulfilled in 2018 and $6,437,000 is expected to be fulfilled in 2019. There were no impairment losses on the Company’s LIHTC investments during the nine months ended September 30, 2018 and 2017 . The Company has elected to use the proportional amortization method, and more specifically the practical expedient method, for the amortization of all eligible LIHTC investments and amortization expense is recognized as a component of income tax expense. The following table summarizes the amortization expense and the amount of tax credits and other tax benefits recognized for qualified affordable housing project investments during the periods presented. Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Amortization expense $ 1,177 682 3,098 1,825 Tax credits and other tax benefits recognized 1,651 1,040 4,314 2,792 The Company also owns the following trust subsidiaries, each of which issued trust preferred securities as Tier 1 capital instruments: Glacier Capital Trust II, Glacier Capital Trust III, Glacier Capital Trust IV, Citizens (ID) Statutory Trust I, Bank of the San Juans Bancorporation Trust I, First Company Statutory Trust 2001, and First Company Statutory Trust 2003. The trust subsidiaries have no assets, operations, revenues or cash flows other than those related to the issuance, administration and repayment of the securities held by third parties. The trust subsidiaries are not included in the Company’s consolidated financial statements because the sole asset of each trust subsidiary is a receivable from the Company, even though the Company owns all of the voting equity shares of the trust subsidiaries, has fully guaranteed the obligations of the trust subsidiaries and may have the right to redeem the third party securities under certain circumstances. The Company reports the trust preferred securities issued to the trust subsidiaries as subordinated debentures on the Company’s statements of financial condition.

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	9 Months Ended
	Sep. 30, 2018
Transfers and Servicing [Abstract]
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase The Company’s securities sold under agreements to repurchase (“repurchase agreements”) totaled $408,754,000 and $362,573,000 at September 30, 2018 and December 31, 2017 , respectively, and are secured by debt securities with carrying values of $489,635,000 and $475,601,000 , respectively. Securities are pledged to customers at the time of the transaction in an amount at least equal to the outstanding balance and are held in custody accounts by third parties. The fair value of collateral is continually monitored and additional collateral is provided as deemed appropriate. The following tables summarize the carrying value of the Company’s repurchase agreements by remaining contractual maturity and category of collateral: September 30, 2018 Remaining Contractual Maturity of the Agreements (Dollars in thousands) Overnight and Continuous 30 - 90 Days Greater Than 90 Days Total State and local governments $ 19,188 — 39,461 58,649 Residential mortgage-backed securities 349,157 — — 349,157 Commercial mortgage-backed securities 948 — — 948 Total $ 369,293 — 39,461 408,754 December 31, 2017 Remaining Contractual Maturity of the Agreements (Dollars in thousands) Overnight and Continuous 30 - 90 Days Greater Than 90 Days Total Residential mortgage-backed securities $ 360,751 — — 360,751 Commercial mortgage-backed securities 1,822 — — 1,822 Total $ 362,573 — — 362,573

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities Interest Rate Swap Derivatives As of September 30, 2018 , the Company’s interest rate swap derivative financial instruments were designated as cash flow hedges and are summarized as follows: (Dollars in thousands) Forecasted Notional Amount Variable Interest Rate 1 Fixed Interest Rate 1 Payment Term Interest rate swap $ 160,000 3 month LIBOR 3.378 % Oct. 21, 2014 - Oct. 21, 2021 Interest rate swap 100,000 3 month LIBOR 2.498 % Nov. 30, 2015 - Nov. 30, 2022 ______________________________ 1 The Company pays the fixed interest rate and the counterparty pays the Company the variable interest rate. The hedging strategy converts the LIBOR-based variable interest rate on borrowings to a fixed interest rate, thereby protecting the Company from interest rate variability. The interest rate swaps with the $160,000,000 and $100,000,000 notional amounts began their payment terms in October 2014 and November 2015, respectively. The Company designated wholesale deposits and Federal Home Loan Bank (“FHLB”) advances as the cash flow hedge and these hedged items were determined to be fully effective during current and prior periods. As such, no amount of ineffectiveness has been included in the Company’s statements of operations for the three and nine months ended September 30, 2018 and 2017 . Therefore, the aggregate fair value of the interest rate swaps was recorded in other liabilities with changes recorded in OCI. The Company expects the hedges to remain highly effective during the remaining terms of the interest rate swaps. Interest expense recorded on the interest rate swaps totaled $5,993,000 for the nine months ended September 30, 2018 and 2017 , and is reported as a component of interest expense on deposits and FHLB advances. Unless the interest rate swaps are terminated during the next year, the Company expects $1,835,000 of the unrealized loss reported in OCI at September 30, 2018 to be reclassified to interest expense during the next twelve months. The following table presents the pre-tax gains or losses recorded in OCI and the Company’s statements of operations relating to the interest rate swap derivative financial instruments: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Interest rate swaps Amount of gain (loss) recognized in OCI (effective portion) $ 1,234 45 7,302 (1,799 ) Amount of loss reclassified from OCI to interest expense (469 ) (1,182 ) (1,946 ) (3,776 ) Amount of loss recognized in other non-interest expense (ineffective portion) — — — — The following table discloses the offsetting of financial assets and interest rate swap derivative assets. September 30, 2018 December 31, 2017 (Dollars in thousands) Gross Amount of Recognized Assets Gross Amount Offset in the Statements of Financial Position Net Amounts of Assets Presented in the Statements of Financial Position Gross Amount of Recognized Assets Gross Amount Offset in the Statements of Financial Position Net Amounts of Assets Presented in the Statements of Financial Position Interest rate swaps $ 2,006 (2,006 ) — — — — The following table discloses the offsetting of financial liabilities and interest rate swap derivative liabilities. September 30, 2018 December 31, 2017 (Dollars in thousands) Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statements of Financial Position Net Amounts of Liabilities Presented in the Statements of Financial Position Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statements of Financial Position Net Amounts of Liabilities Presented in the Statements of Financial Position Interest rate swaps $ 2,148 (2,006 ) 142 9,389 — 9,389 Pursuant to the interest rate swap agreements, the Company pledged collateral to the counterparty in the form of debt securities totaling $4,935,000 at September 30, 2018 . There was $0 collateral pledged from the counterparty to the Company as of September 30, 2018 . There is the possibility that the Company may need to pledge additional collateral in the future if there were declines in the fair value of the interest rate swap derivative financial instruments versus the collateral pledged. Residential Real Estate Derivatives At September 30, 2018 , the Company had residential real estate derivatives for commitments (“interest rate locks”) to fund certain residential real estate loans to be sold into the secondary market. At September 30, 2018 and December 31, 2017 , loans with interest rate lock commitments totaled $97,427,000 and $67,861,000 , respectively, and the fair value of the related derivatives was included in other assets with corresponding changes recorded in gain on sale of loans. It has been the Company’s practice to enter into “best efforts” forward sales commitments for the future delivery of residential real estate loans to third party investors when interest rate lock commitments are entered into in order to economically hedge the effect of changes in interest rates resulting from its commitments to fund the loans. Forward sales commitments on a “best efforts” basis are not designated in hedge relationships until the loan is funded. Due to the forward sales commitments being short-term in nature, the corresponding derivatives were not significant and were not recorded. During 2018, the Company also began to enter into free-standing derivatives to mitigate the interest rate risk associated with certain residential real estate loans to be sold. These derivatives include forward commitments to sell to-be-announced securities (“TBA”) which are used to economically hedge the interest rate risk associated with certain residential real estate loans held for sale and unfunded commitments. At September 30, 2018 , TBA commitments were $71,000,000 and the fair value of the related derivatives was included in other liabilities with corresponding changes recorded in gain on sale of loans.

Other Expenses

Other Expenses	9 Months Ended
	Sep. 30, 2018
Other Expenses [Abstract]
Other Expenses	Other Expenses Other expenses consists of the following: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Mergers and acquisition expenses $ 1,336 245 6,098 1,194 Consulting and outside services 1,986 1,247 5,160 3,651 Telephone 1,187 988 3,350 2,899 Debit card expenses 533 1,840 3,321 5,352 Employee expenses 1,089 1,055 3,022 2,969 Loan expenses 947 653 2,735 2,266 VIE amortization and other expenses 1,118 1,041 2,530 2,453 Postage 772 646 2,327 2,007 Printing and supplies 769 605 2,252 1,913 Business development 672 641 1,782 1,434 Legal fees 464 319 1,245 825 Accounting and audit fees 383 499 1,194 1,508 ATM expenses 293 641 927 1,335 Checking and operating expenses 404 564 871 1,291 Other 1,165 1,214 3,516 3,026 Total other expenses $ 13,118 12,198 40,330 34,123

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The following table illustrates the activity within accumulated other comprehensive loss by component, net of tax: (Dollars in thousands) Gains (Losses) on Available-For-Sale Debt Securities Losses on Derivatives Used for Cash Flow Hedges Total Balance at December 31, 2016 $ 1,639 (9,021 ) (7,382 ) Other comprehensive income (loss) before reclassifications 10,520 (1,102 ) 9,418 Reclassification adjustments for losses included in net income 318 2,313 2,631 Net current period other comprehensive income 10,838 1,211 12,049 Balance at September 30, 2017 $ 12,477 (7,810 ) 4,667 Balance at December 31, 2017 $ 5,031 (7,010 ) (1,979 ) Other comprehensive (loss) income before reclassifications (34,789 ) 5,452 (29,337 ) Reclassification adjustments for losses included in net income 146 1,453 1,599 Net current period other comprehensive (loss) income (34,643 ) 6,905 (27,738 ) Balance at September 30, 2018 $ (29,612 ) (105 ) (29,717 )

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period presented. Diluted earnings per share is computed by including the net increase in shares as if dilutive outstanding restricted stock awards were vested and stock options were exercised, using the treasury stock method. Basic and diluted earnings per share has been computed based on the following: Three Months ended Nine Months ended (Dollars in thousands, except per share data) September 30, September 30, September 30, September 30, Net income available to common stockholders, basic and diluted $ 49,336 36,479 132,279 101,421 Average outstanding shares - basic 84,518,407 78,004,450 83,294,111 77,379,514 Add: dilutive restricted stock awards and stock options 74,715 61,492 68,212 63,430 Average outstanding shares - diluted 84,593,122 78,065,942 83,362,323 77,442,944 Basic earnings per share $ 0.58 0.47 1.59 1.31 Diluted earnings per share $ 0.58 0.47 1.59 1.31 There were no restricted stock awards or stock options excluded from the diluted average outstanding share calculation for the nine months ended September 30, 2018 and 2017 , respectively. Anti-dilution occurs when the unrecognized compensation cost per share of a restricted stock award or the exercise price of a stock option exceeds the market price of the Company’s stock.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Fair Value of Assets and Liabilities Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. There is a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair value are as follows: Level 1 Quoted prices in active markets for identical assets or liabilities Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities Transfers in and out of Level 1 (quoted prices in active markets), Level 2 (significant other observable inputs) and Level 3 (significant unobservable inputs) are recognized on the actual transfer date. There were no transfers between fair value hierarchy levels during the nine month periods ended September 30, 2018 and 2017 . Recurring Measurements The following is a description of the inputs and valuation methodologies used for assets and liabilities measured at fair value on a recurring basis, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy. There have been no significant changes in the valuation techniques during the period ended September 30, 2018 . Debt securities, available-for-sale: fair value for available-for-sale debt securities is estimated by obtaining quoted market prices for identical assets, where available. If such prices are not available, fair value is based on independent asset pricing services and models, the inputs of which are market-based or independently sourced market parameters, including but not limited to, yield curves, interest rates, volatilities, market spreads, prepayments, defaults, recoveries, cumulative loss projections, and cash flows. Such securities are classified in Level 2 of the valuation hierarchy. Where Level 1 or Level 2 inputs are not available, such securities are classified as Level 3 within the hierarchy. Fair value determinations of available-for-sale debt securities are the responsibility of the Company’s corporate accounting and treasury departments. The Company obtains fair value estimates from independent third party vendors on a monthly basis. The vendors’ pricing system methodologies, procedures and system controls are reviewed to ensure they are appropriately designed and operating effectively. The Company reviews the vendors’ inputs for fair value estimates and the recommended assignments of levels within the fair value hierarchy. The review includes the extent to which markets for debt securities are determined to have limited or no activity, or are judged to be active markets. The Company reviews the extent to which observable and unobservable inputs are used as well as the appropriateness of the underlying assumptions about risk that a market participant would use in active markets, with adjustments for limited or inactive markets. In considering the inputs to the fair value estimates, the Company places less reliance on quotes that are judged to not reflect orderly transactions, or are non-binding indications. In assessing credit risk, the Company reviews payment performance, collateral adequacy, third party research and analyses, credit rating histories and issuers’ financial statements. For those markets determined to be inactive or limited, the valuation techniques used are models for which management has verified that discount rates are appropriately adjusted to reflect illiquidity and credit risk. Loans held for sale, at fair value: loans held for sale measured at fair value, for which an active secondary market and readily available market prices exist, are initially valued at the transaction price and are subsequently valued by using quoted prices for similar assets, adjusted for specific attributes of that loan or other observable market data, such as outstanding commitments from third party investors. Loans held for sale measured at fair value are classified within Level 2. Included in gain on sale of loans were net losses of $239,000 and net gains of $893,000 for the nine month periods ended September 30, 2018 and 2017 , respectively, from the changes in fair value of loans held for sale measured at fair value. Electing to measure loans held for sale at fair value reduces certain timing differences and better matches changes in fair value of these assets with changes in the value of the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting. Interest rate swap derivative financial instruments: fair values for interest rate swap derivative financial instruments are based upon the estimated amounts to settle the contracts considering current interest rates and are calculated using discounted cash flows that are observable or that can be corroborated by observable market data and, therefore, are classified within Level 2 of the valuation hierarchy. The inputs used to determine fair value include the 3 month LIBOR forward curve to estimate variable rate cash inflows and the Fed Funds Effective Swap Rate to estimate the discount rate. The estimated variable rate cash inflows are compared to the fixed rate outflows and such difference is discounted to a present value to estimate the fair value of the interest rate swaps. The Company also obtains and compares the reasonableness of the pricing from an independent third party. The following tables disclose the fair value measurement of assets and liabilities measured at fair value on a recurring basis: Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Fair Value September 30, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Debt securities, available-for-sale U.S. government and federal agency $ 25,267 — 25,267 — U.S. government sponsored enterprises 118,550 — 118,550 — State and local governments 644,014 — 644,014 — Corporate bonds 305,225 — 305,225 — Residential mortgage-backed securities 826,164 — 826,164 — Commercial mortgage-backed securities 184,399 — 184,399 — Loans held for sale, at fair value 50,649 — 50,649 — Total assets measured at fair value on a recurring basis $ 2,154,268 — 2,154,268 — Interest rate swaps $ 142 — 142 — Total liabilities measured at fair value on a recurring basis $ 142 — 142 — Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Fair Value December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Debt securities, available-for-sale U.S. government and federal agency $ 31,127 — 31,127 — U.S. government sponsored enterprises 19,091 — 19,091 — State and local governments 629,501 — 629,501 — Corporate bonds 216,762 — 216,762 — Residential mortgage-backed securities 779,283 — 779,283 — Commercial mortgage-backed securities 102,479 — 102,479 — Loans held for sale, at fair value 38,833 — 38,833 — Total assets measured at fair value on a recurring basis $ 1,817,076 — 1,817,076 — Interest rate swaps $ 9,389 — 9,389 — Total liabilities measured at fair value on a recurring basis $ 9,389 — 9,389 — Non-recurring Measurements The following is a description of the inputs and valuation methodologies used for assets recorded at fair value on a non-recurring basis, as well as the general classification of such assets pursuant to the valuation hierarchy. There have been no significant changes in the valuation techniques during the period ended September 30, 2018 . Other real estate owned: OREO is initially recorded at fair value less estimated cost to sell, establishing a new cost basis. OREO is subsequently accounted for at lower of cost or fair value less estimated cost to sell. Estimated fair value of OREO is based on appraisals or evaluations (new or updated). OREO is classified within Level 3 of the fair value hierarchy. Collateral-dependent impaired loans, net of ALLL: loans included in the Company’s loan portfolio for which it is probable that the Company will not collect all principal and interest due according to contractual terms are considered impaired. Estimated fair value of collateral-dependent impaired loans is based on the fair value of the collateral, less estimated cost to sell. Collateral-dependent impaired loans are classified within Level 3 of the fair value hierarchy. The Company’s credit department reviews appraisals for OREO and collateral-dependent loans, giving consideration to the highest and best use of the collateral. The appraisal or evaluation (new or updated) is considered the starting point for determining fair value. The valuation techniques used in preparing appraisals or evaluations (new or updated) include the cost approach, income approach, sales comparison approach, or a combination of the preceding valuation techniques. The key inputs used to determine the fair value of the collateral-dependent loans and OREO include selling costs, discounted cash flow rate or capitalization rate, and adjustment to comparables. Valuations and significant inputs obtained by independent sources are reviewed by the Company for accuracy and reasonableness. The Company also considers other factors and events in the environment that may affect the fair value. The appraisals or evaluations (new or updated) are reviewed at least quarterly and more frequently based on current market conditions, including deterioration in a borrower’s financial condition and when property values may be subject to significant volatility. After review and acceptance of the collateral appraisal or evaluation (new or updated), adjustments to the impaired loan or OREO may occur. The Company generally obtains appraisals or evaluations (new or updated) annually. The following tables disclose the fair value measurement of assets with a recorded change during the period resulting from re-measuring the assets at fair value on a non-recurring basis: Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Fair Value September 30, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other real estate owned $ 3,457 — — 3,457 Collateral-dependent impaired loans, net of ALLL 9,257 — — 9,257 Total assets measured at fair value on a non-recurring basis $ 12,714 — — 12,714 Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Fair Value December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other real estate owned $ 2,296 — — 2,296 Collateral-dependent impaired loans, net of ALLL 6,339 — — 6,339 Total assets measured at fair value on a non-recurring basis $ 8,635 — — 8,635 Non-recurring Measurements Using Significant Unobservable Inputs (Level 3) The following tables present additional quantitative information about assets measured at fair value on a non-recurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Fair Value September 30, 2018 Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands) Valuation Technique Unobservable Input Range (Weighted-Average) 1 Other real estate owned $ 3,457 Sales comparison approach Selling costs 7.0% - 15.0% (7.5%) Collateral-dependent impaired loans, net of ALLL $ 13 Cost approach Selling costs 20.0% - 20.0% (20.0%) 4,197 Sales comparison approach Selling costs 8.0% - 20.0% (10.4%) 5,047 Combined approach Selling costs 10.0% - 10.0% (10.0%) $ 9,257 Fair Value December 31, 2017 Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands) Valuation Technique Unobservable Input Range (Weighted-Average) 1 Other real estate owned $ 2,296 Sales comparison approach Selling costs 0.0% - 10.0% (6.0%) Collateral-dependent impaired loans, net of ALLL $ 238 Cost approach Selling costs 10.0% - 20.0% (10.6%) 2,541 Sales comparison approach Selling costs 8.0% - 10.0% (9.4%) 3,560 Combined approach Selling costs 10.0% - 10.0% (10.0%) $ 6,339 ______________________________ 1 The range for selling cost inputs represents reductions to the fair value of the assets. Fair Value of Financial Instruments The following tables present the carrying amounts, estimated fair values and the level within the fair value hierarchy of the Company’s financial instruments not carried at fair value. Receivables and payables due in one year or less, equity securities without readily determinable fair values and deposits with no defined or contractual maturities are excluded. Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Carrying Amount September 30, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets Cash and cash equivalents $ 307,104 307,104 — — Debt securities, held-to-maturity 590,915 — 583,557 — Loans receivable, net of ALLL 7,990,710 — — 8,002,596 Total financial assets $ 8,888,729 307,104 583,557 8,002,596 Financial liabilities Term deposits $ 1,083,882 — 1,085,035 — FHLB advances 155,328 — 155,281 — Repurchase agreements and other borrowed funds 418,698 — 418,699 — Subordinated debentures 134,055 — 123,363 — Total financial liabilities $ 1,791,963 — 1,782,378 — Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Carrying Amount December 31, 2017 Quoted Prices Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets Cash and cash equivalents $ 200,004 200,004 — — Debt securities, held-to-maturity 648,313 — 660,086 — Loans receivable, net of ALLL 6,448,256 — 6,219,515 114,771 Total financial assets $ 7,296,573 200,004 6,879,601 114,771 Financial liabilities Term deposits $ 977,302 — 978,803 — FHLB advances 353,995 — 352,886 — Repurchase agreements and other borrowed funds 370,797 — 370,797 — Subordinated debentures 126,135 — 98,023 — Total financial liabilities $ 1,828,229 — 1,800,509 —

Mergers and Acquisitions

Mergers and Acquisitions	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Mergers and Acquisitions	Mergers and Acquisitions On February 28, 2018 , the Company acquired 100 percent of the outstanding common stock of Inter-Mountain Bancorp., Inc. and its wholly-owned subsidiary, First Security Bank, a community bank based in Bozeman, Montana. FSB provides banking services to individuals and businesses throughout Montana with banking offices located in Bozeman, Belgrade, Big Sky, Choteau, Fairfield, Fort Benton, Three Forks, Vaughn and West Yellowstone. The acquisition expands the Company’s presence in the Bozeman and Golden Triangle markets in Montana and further diversifies the Company’s loan, customer and deposit base. FSB merged into the Bank and became a new bank division headquartered in Bozeman and the Bank’s existing Bozeman-based division, Big Sky Western Bank, combined with the new FSB division. The agriculture-focused northern branches of FSB combined with the Bank’s First Bank of Montana division. The preliminary value of the FSB acquisition was $181,043,000 and resulted in the Company issuing 4,654,091 shares of its common stock. The fair value of the Company shares issued was determined on the basis of the closing market price of the Company’s common stock on the February 28, 2018 acquisition date. The excess of the preliminary fair value of consideration transferred over total identifiable net assets was recorded as goodwill. The goodwill arising from the acquisition consists largely of the synergies and economies of scale expected from combining the operations of the Company and FSB. None of the goodwill is deductible for income tax purposes as the acquisition was accounted for as a tax-free exchange. On January 31, 2018 , the Company acquired 100 percent of the outstanding common stock of Columbine Capital Corp. and its wholly-owned subsidiary, Collegiate Peaks Bank, a community bank based in Buena Vista, Colorado. Collegiate provides banking services to businesses and individuals in the Mountain and Front Range communities of Colorado, with banking offices located in Aurora, Buena Vista, Denver and Salida. The acquisition expands the Company’s presence in Colorado to the mountains and along the Front Range and further diversifies the Company’s loan, customer and deposit base. Collegiate merged into the Bank and operates as a separate Bank division under its existing name and management team. The preliminary value of the Collegiate acquisition was $96,083,000 and resulted in the Company issuing 1,778,777 shares of its common stock and paying $16,265,000 in cash in exchange for all of Collegiate’s outstanding common stock shares and $10,054,000 due to an effective settlement of pre-existing receivable from Columbine Capital Corp. The fair value of the Company shares issued was determined on the basis of the closing market price of the Company’s common stock on the January 31, 2018 acquisition date. The excess of the preliminary fair value of consideration transferred over total identifiable net assets was recorded as goodwill. The goodwill arising from the acquisition consists largely of the synergies and economies of scale expected from combining the operations of the Company and Collegiate. None of the goodwill is deductible for income tax purposes as the acquisition was accounted for as a tax-free exchange. The assets and liabilities of FSB and Collegiate were recorded on the Company’s consolidated statements of financial condition at their preliminary estimated fair values as of the February 28, 2018 and January 31, 2018 acquisition dates, respectively, and their results of operations have been included in the Company’s consolidated statements of operations since those dates. The following table discloses the preliminary fair value estimates of the consideration transferred, the total identifiable net assets acquired and the resulting goodwill arising from the FSB and Collegiate acquisitions. The Company is continuing to obtain information to determine the fair values of the acquired assets and liabilities. FSB Collegiate (Dollars in thousands) February 28, January 31, Fair value of consideration transferred Fair value of Company shares issued, net of equity issuance costs $ 181,043 69,764 Cash consideration for outstanding shares — 16,265 Effective settlement of a pre-existing relationship — 10,054 Total fair value of consideration transferred 181,043 96,083 Recognized amounts of identifiable assets acquired and liabilities assumed Identifiable assets acquired Cash and cash equivalents 24,397 93,136 Debt securities 271,865 42,177 Loans receivable 627,767 354,252 Core deposit intangible 1 31,053 10,275 Accrued income and other assets 78,325 15,911 Total identifiable assets acquired 1,033,407 515,751 Liabilities assumed Deposits 877,586 437,171 Borrowings 2 36,880 12,509 Accrued expenses and other liabilities 14,175 5,435 Total liabilities assumed 928,641 455,115 Total identifiable net assets 104,766 60,636 Goodwill recognized $ 76,277 35,447 ______________________________ 1 The core deposit intangible for each acquisition was determined to have an estimated life of 10 years . 2 Borrowings assumed with the FSB acquisition include Tier 2 subordinated debentures of $7,903,000 . The preliminary fair values of the FSB and Collegiate assets acquired include loans with preliminary fair values of $627,767,000 and $354,252,000 , respectively. The gross principal and contractual interest due under the FSB and Collegiate contracts was $632,370,000 and $355,364,000 , respectively. The Company evaluated the principal and contractual interest due at each of the acquisition dates and determined that insignificant amounts were not expected to be collectible. The Company incurred $4,670,000 and $1,276,000 of expenses in connection with the FSB and Collegiate acquisitions, respectively, during the nine months ended September 30, 2018 . Mergers and acquisition expenses are included in other expense in the Company's consolidated statements of operations and consist of third-party costs, conversion costs and employee retention and severance expenses. Total income consisting of net interest income and non-interest income of the acquired operations of FSB was approximately $29,901,000 and net income was approximately $7,793,000 from February 28, 2018 to September 30, 2018 . Total income consisting of net interest income and non-interest income of the acquired operations of Collegiate was approximately $16,957,000 and net income was approximately $3,472,000 from January 31, 2018 to September 30, 2018 . The following unaudited pro forma summary presents consolidated information of the Company as if the FSB and Collegiate acquisitions had occurred on January 1, 2017: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Net interest income and non-interest income $ 146,161 135,768 416,611 385,875 Net income 49,336 41,623 127,668 116,174

Nature of Operations and Summ_2

Nature of Operations and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	General Glacier Bancorp, Inc. (“Company”) is a Montana corporation headquartered in Kalispell, Montana. The Company provides a full range of banking services to individuals and businesses in Montana, Idaho, Utah, Washington, Wyoming, Colorado and Arizona through its wholly-owned bank subsidiary, Glacier Bank (“Bank”). The Company offers a wide range of banking products and services, including: 1) retail banking; 2) business banking; 3) real estate, commercial, agriculture and consumer loans; and 4) mortgage origination services. The Company serves individuals, small to medium-sized businesses, community organizations and public entities. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the Company’s financial condition as of September 30, 2018 , the results of operations and comprehensive income for the three and nine month periods ended September 30, 2018 and 2017 , and changes in stockholders’ equity and cash flows for the nine month periods ended September 30, 2018 and 2017 . The condensed consolidated statement of financial condition of the Company as of December 31, 2017 has been derived from the audited consolidated statements of the Company as of that date. The accompanying unaudited condensed consolidated financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America (“GAAP”) for complete financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 . Operating results for the nine months ended September 30, 2018 are not necessarily indicative of the results anticipated for the year ending December 31, 2018 . The Company is a defendant in legal proceedings arising in the normal course of business. In the opinion of management, the disposition of pending litigation will not have a material affect on the Company’s consolidated financial position, results of operations or liquidity. Material estimates that are particularly susceptible to significant change include: 1) the determination of the allowance for loan and lease losses (“ALLL” or “allowance”); 2) the valuation of debt securities; 3) the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans; and 4) the evaluation of goodwill impairment. For the determination of the ALLL and real estate valuation estimates, management obtains independent appraisals (new or updated) for significant items. Estimates relating to investment valuations are obtained from independent third parties. Estimates relating to the evaluation of goodwill for impairment are determined based on internal calculations using significant independent party inputs.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements of the Company include the parent holding company and the Bank. The Bank consists of fourteen bank divisions, a treasury division, an information technology division and a centralized mortgage division. The treasury division includes the Bank’s investment portfolio and wholesale borrowings, the information technology division includes the Bank’s internal data processing, and the centralized mortgage division includes mortgage loan servicing and secondary market sales. The Bank divisions operate under separate names, management teams and advisory directors. The Company considers the Bank to be its sole operating segment as the Bank 1) engages in similar bank business activity from which it earns revenues and incurs expenses; 2) the operating results of the Bank are regularly reviewed by the Chief Executive Officer (“CEO”) (i.e., the chief operating decision maker) who makes decisions about resources to be allocated to the Bank; and 3) financial information is available for the Bank. All significant inter-company transactions have been eliminated in consolidation. The Bank has subsidiary interests in variable interest entities (“VIE”) for which the Bank has both the power to direct the VIE’s significant activities and the obligation to absorb losses or right to receive benefits of the VIE that could potentially be significant to the VIE. These subsidiary interests are included in the Company’s consolidated financial statements. The Bank also has subsidiary interests in VIEs for which the Bank does not have a controlling financial interest and is not the primary beneficiary. These subsidiary interests are not included in the Company’s consolidated financial statements. The parent holding company owns non-bank subsidiaries that have issued trust preferred securities as Tier 1 capital instruments. The trust subsidiaries are not included in the Company’s consolidated financial statements. The Company's investments in the trust subsidiaries are included in other assets on the Company's statements of financial condition. In February 2018, the Company completed its acquisition of Inter-Mountain Bancorp., Inc. and its wholly-owned subsidiary, First Security Bank, a community bank based in Bozeman, Montana (collectively, “FSB”). In January 2018, the Company completed its acquisition of Columbine Capital Corp., and its wholly-owned subsidiary, Collegiate Peaks Bank, a community bank based in Buena Vista, Colorado (collectively, “Collegiate”). The transactions were accounted for using the acquisition method, and their results of operations have been included in the Company’s consolidated financial statements as of the acquisition dates. For additional information relating to recent mergers and acquisitions, see Note 12.
Loans Receivable	Loans Receivable Loans that are intended to be held-to-maturity are reported at the unpaid principal balance less net charge-offs and adjusted for deferred fees and costs on originated loans and unamortized premiums or discounts on acquired loans. Fees and costs on originated loans and premiums or discounts on acquired loans are deferred and subsequently amortized or accreted as a yield adjustment over the expected life of the loan utilizing the interest method. The objective of the interest method is to calculate periodic interest income at a constant effective yield. When a loan is paid off prior to maturity, the remaining fees and costs on originated loans and premiums or discounts on acquired loans are immediately recognized into interest income. The Company’s loan segments, which are based on the purpose of the loan, include residential real estate, commercial, and consumer loans. The Company’s loan classes, a further disaggregation of segments, include residential real estate loans (residential real estate segment), commercial real estate and other commercial loans (commercial segment), and home equity and other consumer loans (consumer segment). Loans that are thirty days or more past due based on payments received and applied to the loan are considered delinquent. Loans are designated non-accrual and the accrual of interest is discontinued when the collection of the contractual principal or interest is unlikely. A loan is typically placed on non-accrual when principal or interest is due and has remained unpaid for ninety days or more. When a loan is placed on non-accrual status, interest previously accrued but not collected is reversed against current period interest income. Subsequent payments on non-accrual loans are applied to the outstanding principal balance if doubt remains as to the ultimate collectability of the loan. Interest accruals are not resumed on partially charged-off impaired loans. For other loans on nonaccrual, interest accruals are resumed on such loans only when they are brought fully current with respect to interest and principal and when, in the judgment of management, the loans are estimated to be fully collectible as to both principal and interest. The Company considers impaired loans to be the primary credit quality indicator for monitoring the credit quality of the loan portfolio. Loans are designated impaired when, based upon current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement and, therefore, the Company has serious doubts as to the ability of such borrowers to fulfill the contractual obligation. Impaired loans include non-performing loans (i.e., non-accrual loans and accruing loans ninety days or more past due) and accruing loans under ninety days past due where it is probable payments will not be received according to the loan agreement (e.g., troubled debt restructuring). Interest income on accruing impaired loans is recognized using the interest method. The Company measures impairment on a loan-by-loan basis in the same manner for each class within the loan portfolio. An insignificant delay or shortfall in the amounts of payments would not cause a loan or lease to be considered impaired. The Company determines the significance of payment delays and shortfalls on a case-by-case basis, taking into consideration all of the facts and circumstances surrounding the loan and the borrower, including the length and reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest due. A restructured loan is considered a troubled debt restructuring (“TDR”) if the creditor, for economic or legal reasons related to the debtor’s financial difficulties, grants a concession to the debtor that it would not otherwise consider. The Company periodically enters into restructure agreements with borrowers whereby the loans were previously identified as TDRs. When such circumstances occur, the Company carefully evaluates the facts of the subsequent restructure to determine the appropriate accounting and under certain circumstances it may be acceptable not to account for the subsequently restructured loan as a TDR. When assessing whether a concession has been granted by the Company, any prior forgiveness on a cumulative basis is considered a continuing concession. A TDR loan is considered an impaired loan and a specific valuation allowance is established when the fair value of the collateral-dependent loan or present value of the loan’s expected future cash flows (discounted at the loan’s effective interest rate based on the original contractual rate) is lower than the carrying value of the impaired loan. The Company has made the following types of loan modifications, some of which were considered a TDR: • reduction of the stated interest rate for the remaining term of the debt; • extension of the maturity date(s) at a stated rate of interest lower than the current market rate for newly originated debt having similar risk characteristics; and • reduction of the face amount of the debt as stated in the debt agreements. The Company recognizes that while borrowers may experience deterioration in their financial condition, many continue to be creditworthy customers who have the willingness and capacity for debt repayment. In determining whether non-restructured or unimpaired loans issued to a single or related party group of borrowers should continue to accrue interest when the borrower has other loans that are impaired or are TDRs, the Company on a quarterly or more frequent basis performs an updated and comprehensive assessment of the willingness and capacity of the borrowers to timely and ultimately repay their total debt obligations, including contingent obligations. Such analysis takes into account current financial information about the borrowers and financially responsible guarantors, if any, including for example: • analysis of global, i.e., aggregate debt service for total debt obligations; • assessment of the value and security protection of collateral pledged using current market conditions and alternative market assumptions across a variety of potential future situations; and • loan structures and related covenants. For additional information relating to loans, see Note 3.
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses Based upon management’s analysis of the Company’s loan portfolio, the balance of the ALLL is an estimate of probable credit losses known and inherent within the Bank’s loan portfolio as of the date of the consolidated financial statements. The ALLL is analyzed at the loan class level and is maintained within a range of estimated losses. Determining the adequacy of the ALLL involves a high degree of judgment and is inevitably imprecise as the risk of loss is difficult to quantify. The determination of the ALLL and the related provision for loan losses is a critical accounting estimate that involves management’s judgments about known relevant internal and external environmental factors that affect loan losses. The balance of the ALLL is highly dependent upon management’s evaluations of borrowers’ current and prospective performance, appraisals and other variables affecting the quality of the loan portfolio. Individually significant loans and major lending areas are reviewed periodically to determine potential problems at an early date. Changes in management’s estimates and assumptions are reasonably possible and may have a material impact upon the Company’s consolidated financial statements, results of operations or capital. Risk characteristics considered in the ALLL analysis applicable to each loan class within the Company's loan portfolio are as follows: Residential Real Estate. Residential real estate loans are secured by owner-occupied 1-4 family residences. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers. Credit risk in these loans is impacted by economic conditions within the Company’s market areas that affect the value of the property securing the loans and affect the borrowers' personal incomes. Mitigating risk factors for this loan class include a large number of borrowers, geographic dispersion of market areas and the loans are originated for relatively smaller amounts. Commercial Real Estate . Commercial real estate loans typically involve larger principal amounts, and repayment of these loans is generally dependent on the successful operation of the property securing the loan and/or the business conducted on the property securing the loan. Credit risk in these loans is impacted by the creditworthiness of a borrower, valuation of the property securing the loan and conditions within the local economies in the Company’s diverse, geographic market areas. Commercial . Commercial loans consist of loans to commercial customers for use in financing working capital needs, equipment purchases and business expansions. The loans in this category are repaid primarily from the cash flow of a borrower’s principal business operation. Credit risk in these loans is driven by creditworthiness of a borrower and the economic conditions that impact the cash flow stability from business operations across the Company’s diverse, geographic market areas. Home Equity . Home equity loans consist of junior lien mortgages and first and junior lien lines of credit (revolving open-end and amortizing closed-end) secured by owner-occupied 1-4 family residences. Repayment of these loans is primarily dependent on the personal income and credit rating of the borrowers. Credit risk in these loans is impacted by economic conditions within the Company’s market areas that affect the value of the residential property securing the loans and affect the borrowers' personal incomes. Mitigating risk factors for this loan class are a large number of borrowers, geographic dispersion of market areas and the loans are originated for terms that range from 10 to 15 years . Other Consumer . The other consumer loan portfolio consists of various short-term loans such as automobile loans and loans for other personal purposes. Repayment of these loans is primarily dependent on the personal income of the borrowers. Credit risk is driven by consumer economic factors (such as unemployment and general economic conditions in the Company’s diverse, geographic market area) and the creditworthiness of a borrower. The ALLL consists of a specific valuation allowance component and a general valuation allowance component. The specific component relates to loans that are determined to be impaired and individually evaluated for impairment. The Company measures impairment on a loan-by-loan basis based on the present value of expected future cash flows discounted at the loan’s effective interest rate, except when it is determined that repayment of the loan is expected to be provided solely by the underlying collateral. For impairment based on expected future cash flows, the Company considers all information available as of a measurement date, including past events, current conditions, potential prepayments, and estimated cost to sell when such costs are expected to reduce the cash flows available to repay or otherwise satisfy the loan. For alternative ranges of cash flows, the likelihood of the possible outcomes is considered in determining the best estimate of expected future cash flows. The effective interest rate for a loan restructured in a TDR is based on the original contractual rate. For collateral-dependent loans and real estate loans for which foreclosure or a deed-in-lieu of foreclosure is probable, impairment is measured by the fair value of the collateral, less estimated cost to sell. The fair value of the collateral is determined primarily based upon appraisal or evaluation of the underlying real property value. The general valuation allowance component relates to probable credit losses inherent in the balance of the loan portfolio based on historical loss experience, adjusted for changes in trends and conditions of qualitative or environmental factors. The historical loss experience is based on the previous twelve quarters loss experience by loan class adjusted for risk characteristics in the existing loan portfolio. The same trends and conditions are evaluated for each class within the loan portfolio; however, the risk characteristics are weighted separately at the individual class level based on the Company’s judgment and experience. The changes in trends and conditions evaluated for each class within the loan portfolio include the following: • changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off, and recovery practices not considered elsewhere in estimating credit losses; • changes in global, national, regional, and local economic and business conditions and developments that affect the collectability of the portfolio, including the condition of various market segments; • changes in the nature and volume of the portfolio and in the terms of loans; • changes in experience, ability, and depth of lending management and other relevant staff; • changes in the volume and severity of past due and nonaccrual loans; • changes in the quality of the Company’s loan review system; • changes in the value of underlying collateral for collateral-dependent loans; • the existence and effect of any concentrations of credit, and changes in the level of such concentrations; and • the effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the Company’s existing portfolio. The ALLL is increased by provisions for loan losses which are charged to expense. The portions of loan and overdraft balances determined by management to be uncollectible are charged off as a reduction of the ALLL and recoveries of amounts previously charged off are credited as an increase to the ALLL. The Company’s charge-off policy is consistent with bank regulatory standards. Consumer loans generally are charged off when the loan becomes over 120 days delinquent. Real estate acquired as a result of foreclosure or by deed-in-lieu of foreclosure is classified as other real estate owned (“OREO”) until such time as it is sold. At acquisition date, the assets and liabilities of acquired banks are recorded at their estimated fair values which results in no ALLL carried over from acquired banks. Subsequent to acquisition, an allowance will be recorded on the acquired loan portfolios for further credit deterioration, if any.
Revenue Recognition	Revenue Recognition The Company recognizes revenue when services or products are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled. The Company’s principal source of revenue is interest income from debt securities and loans. Revenue from contracts with customers within the scope of Accounting Standards Codification ™ (“ASC”) Topic 606 was $56,519,000 and $52,058,000 for the nine months ended September 30, 2018 and 2017 , respectively, and largely consisted of revenue from service charges and other fees from deposits (e.g., overdraft fees, ATM fees, debit card fees). Due to the short-term nature of the Company’s contracts with customers, an insignificant amount of receivables related to such revenue was recorded at September 30, 2018 and December 31, 2017 and there were no impairment losses recognized. Policies specific to revenue from contracts with customers include the following: Service Charges. Revenue from service charges consists of service charges and fees on deposit accounts under depository agreements with customers to provide access to deposited funds and, when applicable, pay interest on deposits. Service charges on deposit accounts may be transactional or non-transactional in nature. Transactional service charges occur in the form of a service or penalty and are charged upon the occurrence of an event (e.g., overdraft fees, ATM fees, wire transfer fees). Transactional service charges are recognized as services are delivered to and consumed by the customer, or as penalty fees are charged. Non-transactional service charges are charges that are based on a broader service, such as account maintenance fees and dormancy fees, and are recognized on a monthly basis. Debit Card Fees. Revenue from debit card fees includes interchange fee income from debit cards processed through card association networks. Interchange fees represent a portion of a transaction amount that the Company and other involved parties retain to compensate themselves for giving the cardholder immediate access to funds. Interchange rates are generally set by the card association networks and are based on purchase volumes and other factors. The Company records interchange fees as services are provided.
Accounting Guidance Adopted in 2018 and Pending Adoption at September 30, 2018	Accounting Guidance Adopted in 2018 The ASC is the Financial Accounting Standards Board’s (“FASB”) officially recognized source of authoritative GAAP applicable to all public and non-public non-governmental entities. Rules and interpretive releases of the Securities and Exchange Commission (“SEC”) under the authority of the federal securities laws are also sources of authoritative GAAP for the Company as an SEC registrant. All other accounting literature is non-authoritative. The following paragraphs provide descriptions of recently adopted accounting standards that may have had a material effect on the Company’s financial position or results of operations. Financial Instruments. In January 2016, FASB amended ASC Topic 825 to address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The amendments were effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2017. Amendments were to be applied by means of a cumulative-effect adjustment to the Company’s statements of financial condition as of the beginning of the reporting year of adoption. The amendments impacted the Company as follows: 1) equity investments (with certain exclusions) are to be measured at fair value with the changes recognized in net income; 2) an exit price must be utilized when measuring the fair value of financial instruments; and 3) additional disclosures are required relating to other comprehensive income (“OCI”), the evaluation of a valuation allowance on a deferred tax asset related to available-for-sale debt securities in combination with the entity’s other deferred tax assets, and other disclosures. The Company adopted the amendments effective January 1, 2018 and determined that the impact of these amendments did not have a significant impact on the Company’s equity securities, fair value disclosures, financial position or results of operations. The amendments changed the method utilized to disclose the fair value of the loan portfolio to an exit price notion when measuring fair value. The Company developed processes to comply with the disclosure requirements of such amendments and accounting policies and procedures were updated accordingly. For additional information on fair value of assets and liabilities, see Note 11. Revenue Recognition. In May 2014, FASB amended ASC Topic 606 to clarify the principles for recognizing revenue and develop a common revenue standard among industries. The new guidance established the following core principle: recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for goods or services. Five steps were provided for a company or organization to follow to achieve such core principle. The new guidance also included a cohesive set of disclosure requirements that provided users of financial statements with comprehensive information about the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The Company adopted the new revenue recognition guidance effective January 1, 2018 and determined the majority of the Company’s revenue sources, such as interest income from debt securities and loans, fee income from loans and gain on sale of loans, were not within the scope of Topic 606. The Company evaluated the revenue sources determined to be in scope of Topic 606, including service charges and fee income on deposits and gain or loss on sale of OREO and determined the adoption of the guidance did not have a significant impact to the Company’s financial position or results of operations; however, OREO policies and procedures were updated and implemented and new disclosures about the Company’s revenue have been incorporated into the notes to the financial statements. Accounting Guidance Pending Adoption at September 30, 2018 The following paragraphs provide descriptions of newly issued but not yet effective accounting standards that could have a material effect on the Company’s financial position or results of operations. Derivatives and Hedging. In August 2017, FASB amended ASC Topic 815 to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. In addition, the amendments made targeted improvements to simplify the application of the hedge accounting guidance. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently evaluating the full impact of the amendments on its existing interest rate swaps and whether it will early adopt. The Company does not expect there to be an impact to the Company’s financial position and results of operations, although, there may be additional financial statement disclosures. The accounting policies and procedures will be modified after the Company has fully evaluated the standard, although significant changes are not expected. For additional information on derivatives, see Note 7. Receivables - Nonrefundable Fees and Other Costs. In March 2017, FASB amended ASC Subtopic 310-20 to shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date instead of the maturity date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2018. Early adoption is permitted and if adopted in an interim period, any adjustments should be reflected as of the beginning of the year that includes the interim period. The entity should apply the amendments on a modified retrospective basis through a cumulative-effective adjustment directly to retained earnings as of the beginning of the period of adoption. The Company has premiums on debt securities that are currently being amortized to the maturity date, primarily in the state and local governments category. If the Company were to adopt these amendments as of October 1, 2018, the Company estimates that $22,612,000 of the premium associated with debt securities would be adjusted to retained earnings. The Company is currently reviewing the amendments to ensure it is fully compliant by the adoption date, including accounting policies and procedures, and doesn’t expect to early adopt. Goodwill and Other Intangibles. In January 2017, FASB amended ASC Topic 350 to simplify the measurement of goodwill by eliminating Step 2 from the goodwill impairment test. Instead, under these amendments, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss should not exceed the total amount of goodwill allocated to that reporting unit. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company has goodwill from prior business combinations and performs an annual impairment test or more frequently if changes or circumstances occur that would more-likely-than-not reduce the fair value of the reporting unit below its carrying value. During the third quarter of 2018, the Company performed its impairment assessment and determined the fair value of the aggregated reporting units exceeded the carrying value, such that the Company’s goodwill was not considered impaired. Although the Company cannot anticipate future goodwill impairment assessments, based on the most recent assessment, it is unlikely that an impairment amount would need to be calculated and, therefore, the Company does not anticipate a material impact from these amendments to the Company’s financial position and results of operations. The current accounting policies and processes are not anticipated to change, except for the elimination of the Step 2 analysis. For additional information regarding goodwill impairment testing, see Note 4. Financial Instruments. In June 2016, FASB amended ASC Topic 326 to replace the incurred loss model with a methodology that reflects expected credit losses over the life of the loan and requires consideration of a broader range of reasonable and supportable information to calculate credit loss estimates. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2019. The Company is currently evaluating the impact of these amendments to the Company’s financial position and results of operations and currently does not know or cannot reasonably quantify the impact of the adoption of the amendments as a result of the complexity and extensive changes from the amendments. The ALLL is a material estimate of the Company and given the change from an incurred loss model to a methodology that considers the credit loss over the life of the loan, there is the potential for an increase in the ALLL at adoption date. The Company is anticipating a significant change in the processes and procedures to calculate the ALLL, including changes in assumptions and estimates to consider expected credit losses over the life of the loan versus the current accounting practice that utilizes the incurred loss model. The Company will also develop new procedures for determining an allowance for credit losses relating to held-to-maturity debt securities. In addition, the current accounting policy and procedures for other-than-temporary impairment on available-for-sale debt securities will be replaced with an allowance approach. The Company formed a project team and is actively reviewing the standard for developing and implementing processes and procedures to ensure it is fully compliant with the amendments at adoption date. For additional information on the ALLL, see Note 3. Leases. In February 2016, FASB amended ASC Topic 842 to address several aspects of lease accounting with the significant change being the recognition of lease assets and lease liabilities for leases previously classified as operating leases. The amendments are effective for public business entities for the first interim and annual reporting periods beginning after December 15, 2018, and early adoption is permitted. The Company has lease agreements for which the amendments will require the recognition of a lease liability to make lease payments and a right-of-use asset which will represent its right to use the underlying asset for the lease term. The Company is currently reviewing the amendments to ensure it is fully compliant by the adoption date and doesn’t expect to early adopt. The Company does not expect the amendments to have a material effect on the Company’s financial position or results of operations since the Company does not have a significant amount of lease agreements. New processes and accounting policies will be implemented to comply with the amendments.

Debt Securities (Tables)

Debt Securities (Tables)	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Amortized cost, gross unrealized gains and losses and fair value of debt securities	The following tables present the amortized cost, the gross unrealized gains and losses and the fair value of the Company’s debt securities: September 30, 2018 Amortized Cost Gross Unrealized Fair Value (Dollars in thousands) Gains Losses Available-for-sale U.S. government and federal agency $ 25,363 64 (160 ) 25,267 U.S. government sponsored enterprises 120,498 — (1,948 ) 118,550 State and local governments 647,908 10,040 (13,934 ) 644,014 Corporate bonds 306,057 696 (1,528 ) 305,225 Residential mortgage-backed securities 855,183 183 (29,202 ) 826,164 Commercial mortgage-backed securities 188,273 — (3,874 ) 184,399 Total available-for-sale 2,143,282 10,983 (50,646 ) 2,103,619 Held-to-maturity State and local governments 590,915 7,482 (14,840 ) 583,557 Total held-to-maturity 590,915 7,482 (14,840 ) 583,557 Total debt securities $ 2,734,197 18,465 (65,486 ) 2,687,176 December 31, 2017 Amortized Cost Gross Unrealized Fair Value (Dollars in thousands) Gains Losses Available-for-sale U.S. government and federal agency $ 31,216 54 (143 ) 31,127 U.S. government sponsored enterprises 19,195 — (104 ) 19,091 State and local governments 614,366 20,299 (5,164 ) 629,501 Corporate bonds 216,443 802 (483 ) 216,762 Residential mortgage-backed securities 785,960 1,253 (7,930 ) 779,283 Commercial mortgage-backed securities 104,324 25 (1,870 ) 102,479 Total available-for-sale 1,771,504 22,433 (15,694 ) 1,778,243 Held-to-maturity State and local governments 648,313 20,346 (8,573 ) 660,086 Total held-to-maturity 648,313 20,346 (8,573 ) 660,086 Total debt securities $ 2,419,817 42,779 (24,267 ) 2,438,329
Amortized cost and fair value of securities by contractual maturity	The following table presents the amortized cost and fair value of available-for-sale and held-to-maturity debt securities by contractual maturity at September 30, 2018 . Actual maturities may differ from expected or contractual maturities since issuers have the right to prepay obligations with or without prepayment penalties. September 30, 2018 Available-for-Sale Held-to-Maturity (Dollars in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 151,030 150,658 — — Due after one year through five years 322,470 319,836 4,551 4,555 Due after five years through ten years 284,496 285,279 108,553 106,980 Due after ten years 341,830 337,283 477,811 472,022 1,099,826 1,093,056 590,915 583,557 Mortgage-backed securities 1 1,043,456 1,010,563 — — Total $ 2,143,282 2,103,619 590,915 583,557 ______________________________ 1 Mortgage-backed securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds.
Proceeds from sales and calls of debt securities and the associated gains and losses	Proceeds from sales and calls of debt securities and the associated gains and losses that have been included in earnings are listed below: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Available-for-sale Proceeds from sales and calls of debt securities $ 12,135 155,894 245,581 268,557 Gross realized gains 1 188 278 203 3,345 Gross realized losses 1 (37 ) (201 ) (398 ) (3,864 ) Held-to-maturity Proceeds from calls of debt securities 28,435 3,675 57,370 18,910 Gross realized gains 1 12 — 76 153 Gross realized losses 1 (530 ) — (637 ) (179 ) ______________________________ 1 The gain or loss on the sale or call of each debt security is determined by the specific identification method.
Summary of debt securities with an unrealized loss position	Debt securities with an unrealized loss position are summarized as follows: September 30, 2018 Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Available-for-sale U.S. government and federal agency $ 6,553 (28 ) 8,887 (132 ) 15,440 (160 ) U.S. government sponsored enterprises 112,590 (1,791 ) 5,960 (157 ) 118,550 (1,948 ) State and local governments 215,703 (4,959 ) 145,908 (8,975 ) 361,611 (13,934 ) Corporate bonds 173,308 (820 ) 60,862 (708 ) 234,170 (1,528 ) Residential mortgage-backed securities 328,829 (6,397 ) 471,471 (22,805 ) 800,300 (29,202 ) Commercial mortgage-backed securities 104,099 (1,240 ) 74,278 (2,634 ) 178,377 (3,874 ) Total available-for-sale $ 941,082 (15,235 ) 767,366 (35,411 ) 1,708,448 (50,646 ) Held-to-maturity State and local governments $ 201,181 (6,234 ) 90,502 (8,606 ) 291,683 (14,840 ) Total held-to-maturity $ 201,181 (6,234 ) 90,502 (8,606 ) 291,683 (14,840 ) December 31, 2017 Less than 12 Months 12 Months or More Total (Dollars in thousands) Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Available-for-sale U.S. government and federal agency $ 1,208 (5 ) 13,179 (138 ) 14,387 (143 ) U.S. government sponsored enterprises 14,926 (56 ) 3,425 (48 ) 18,351 (104 ) State and local governments 61,126 (689 ) 121,181 (4,475 ) 182,307 (5,164 ) Corporate bonds 99,636 (264 ) 29,034 (219 ) 128,670 (483 ) Residential mortgage-backed securities 372,175 (3,050 ) 254,721 (4,880 ) 626,896 (7,930 ) Commercial mortgage-backed securities 37,650 (469 ) 62,968 (1,401 ) 100,618 (1,870 ) Total available-for-sale $ 586,721 (4,533 ) 484,508 (11,161 ) 1,071,229 (15,694 ) Held-to-maturity State and local governments $ 21,207 (186 ) 105,486 (8,387 ) 126,693 (8,573 ) Total held-to-maturity $ 21,207 (186 ) 105,486 (8,387 ) 126,693 (8,573 )

Loans Receivable, Net (Tables)

Loans Receivable, Net (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Summary of loans receivable	The following table presents loans receivable for each portfolio class of loans: At or for the Nine Months ended At or for the Year ended (Dollars in thousands) September 30, December 31, Residential real estate loans $ 862,830 720,728 Commercial loans Real estate 4,527,577 3,577,139 Other commercial 1,921,955 1,579,353 Total 6,449,532 5,156,492 Consumer and other loans Home equity 528,404 457,918 Other consumer 282,479 242,686 Total 810,883 700,604 Loans receivable 8,123,245 6,577,824 Allowance for loan and lease losses (132,535 ) (129,568 ) Loans receivable, net $ 7,990,710 6,448,256 Net deferred origination (fees) costs included in loans receivable $ (4,876 ) (2,643 ) Net purchase accounting (discounts) premiums included in loans receivable $ (26,601 ) (16,325 ) Weighted-average interest rate on loans (tax-equivalent) 4.94 % 4.81 %
Summary of the activity in the ALLL	The following tables summarize the activity in the ALLL by loan class: Three Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 131,564 10,903 71,245 38,664 6,092 4,660 Provision for loan losses 3,194 54 2,922 (257 ) (165 ) 640 Charge-offs (4,294 ) (210 ) (909 ) (897 ) (82 ) (2,196 ) Recoveries 2,071 7 308 447 83 1,226 Balance at end of period $ 132,535 10,754 73,566 37,957 5,928 4,330 Three Months ended September 30, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 129,877 11,522 68,503 36,984 7,662 5,206 Provision for loan losses 3,327 (10 ) 2,214 696 (682 ) 1,109 Charge-offs (5,983 ) (44 ) (3,227 ) (374 ) (15 ) (2,323 ) Recoveries 2,355 12 735 514 16 1,078 Balance at end of period $ 129,576 11,480 68,225 37,820 6,981 5,070 Nine Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 129,568 10,798 68,515 39,303 6,204 4,748 Provision for loan losses 8,707 135 5,941 415 (359 ) 2,575 Charge-offs (11,905 ) (257 ) (2,132 ) (3,325 ) (101 ) (6,090 ) Recoveries 6,165 78 1,242 1,564 184 3,097 Balance at end of period $ 132,535 10,754 73,566 37,957 5,928 4,330 Nine Months ended September 30, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Balance at beginning of period $ 129,572 12,436 65,773 37,823 7,572 5,968 Provision for loan losses 7,938 (946 ) 6,403 551 (324 ) 2,254 Charge-offs (14,801 ) (87 ) (5,261 ) (1,855 ) (458 ) (7,140 ) Recoveries 6,867 77 1,310 1,301 191 3,988 Balance at end of period $ 129,576 11,480 68,225 37,820 6,981 5,070
Summary of ALLL and loans receivable	The following tables disclose the recorded investment in loans and the balance in the ALLL by loan class: September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Loans receivable Individually evaluated for impairment $ 123,576 14,007 81,170 21,973 3,569 2,857 Collectively evaluated for impairment 7,999,669 848,823 4,446,407 1,899,982 524,835 279,622 Total loans receivable $ 8,123,245 862,830 4,527,577 1,921,955 528,404 282,479 ALLL Individually evaluated for impairment $ 1,690 83 650 687 5 265 Collectively evaluated for impairment 130,845 10,671 72,916 37,270 5,923 4,065 Total ALLL $ 132,535 10,754 73,566 37,957 5,928 4,330 December 31, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Loans receivable Individually evaluated for impairment $ 119,994 12,399 77,536 23,032 3,755 3,272 Collectively evaluated for impairment 6,457,830 708,329 3,499,603 1,556,321 454,163 239,414 Total loans receivable $ 6,577,824 720,728 3,577,139 1,579,353 457,918 242,686 ALLL Individually evaluated for impairment $ 5,223 246 500 3,851 56 570 Collectively evaluated for impairment 124,345 10,552 68,015 35,452 6,148 4,178 Total ALLL $ 129,568 10,798 68,515 39,303 6,204 4,748
Summary of impaired loans	The following tables disclose information related to impaired loans by loan class: At or for the Three or Nine Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Loans with a specific valuation allowance Recorded balance $ 20,021 2,367 9,843 6,878 38 895 Unpaid principal balance 20,327 2,442 10,043 6,878 38 926 Specific valuation allowance 1,690 83 650 687 5 265 Average balance - three months 18,267 2,434 10,005 4,775 19 1,034 Average balance - nine months 19,599 2,868 8,286 7,034 72 1,339 Loans without a specific valuation allowance Recorded balance 103,555 11,640 71,327 15,095 3,531 1,962 Unpaid principal balance 125,552 12,845 88,290 18,245 4,110 2,062 Average balance - three months 113,734 10,783 76,027 21,604 3,560 1,760 Average balance - nine months 111,037 10,154 77,489 18,293 3,488 1,613 Total Recorded balance 123,576 14,007 81,170 21,973 3,569 2,857 Unpaid principal balance 145,879 15,287 98,333 25,123 4,148 2,988 Specific valuation allowance 1,690 83 650 687 5 265 Average balance - three months 132,001 13,217 86,032 26,379 3,579 2,794 Average balance - nine months 130,636 13,022 85,775 25,327 3,560 2,952 At or for the Year ended December 31, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Loans with a specific valuation allowance Recorded balance $ 17,689 2,978 4,545 8,183 186 1,797 Unpaid principal balance 18,400 3,046 4,573 8,378 199 2,204 Specific valuation allowance 5,223 246 500 3,851 56 570 Average balance 18,986 2,928 5,851 8,477 359 1,371 Loans without a specific valuation allowance Recorded balance 102,305 9,421 72,991 14,849 3,569 1,475 Unpaid principal balance 122,833 10,380 89,839 16,931 4,098 1,585 Average balance 107,945 9,834 76,427 15,129 4,734 1,821 Total Recorded balance 119,994 12,399 77,536 23,032 3,755 3,272 Unpaid principal balance 141,233 13,426 94,412 25,309 4,297 3,789 Specific valuation allowance 5,223 246 500 3,851 56 570 Average balance 126,931 12,762 82,278 23,606 5,093 3,192
Loan portfolio aging analysis	The following tables present an aging analysis of the recorded investment in loans by loan class: September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Accruing loans 30-59 days past due $ 13,973 667 5,621 4,325 1,856 1,504 Accruing loans 60-89 days past due 11,208 6,242 989 2,049 1,015 913 Accruing loans 90 days or more past due 4,333 2,063 466 1,461 122 221 Non-accrual loans 55,373 7,855 34,267 9,833 2,924 494 Total past due and non-accrual loans 84,887 16,827 41,343 17,668 5,917 3,132 Current loans receivable 8,038,358 846,003 4,486,234 1,904,287 522,487 279,347 Total loans receivable $ 8,123,245 862,830 4,527,577 1,921,955 528,404 282,479 December 31, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer Accruing loans 30-59 days past due $ 26,375 6,252 12,546 3,634 2,142 1,801 Accruing loans 60-89 days past due 11,312 794 5,367 3,502 987 662 Accruing loans 90 days or more past due 6,077 2,366 609 2,973 — 129 Non-accrual loans 44,833 4,924 27,331 8,298 3,338 942 Total past due and non-accrual loans 88,597 14,336 45,853 18,407 6,467 3,534 Current loans receivable 6,489,227 706,392 3,531,286 1,560,946 451,451 239,152 Total loans receivable $ 6,577,824 720,728 3,577,139 1,579,353 457,918 242,686
Summary of TDRs	The following tables present TDRs that occurred during the periods presented and the TDRs that occurred within the previous twelve months that subsequently defaulted during the periods presented: Three Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer TDRs that occurred during the period Number of loans 2 — — 1 — 1 Pre-modification recorded balance $ 312 — — 7 — 305 Post-modification recorded balance $ 312 — — 7 — 305 TDRs that subsequently defaulted Number of loans 1 1 — — — — Recorded balance $ 47 47 — — — — Three Months ended September 30, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer TDRs that occurred during the period Number of loans 5 1 1 3 — — Pre-modification recorded balance $ 956 317 386 253 — — Post-modification recorded balance $ 956 317 386 253 — — TDRs that subsequently defaulted Number of loans — — — — — — Recorded balance $ — — — — — — Nine Months ended September 30, 2018 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer TDRs that occurred during the period Number of loans 22 3 8 8 2 1 Pre-modification recorded balance $ 21,582 666 12,901 7,458 252 305 Post-modification recorded balance $ 21,468 666 12,787 7,458 252 305 TDRs that subsequently defaulted Number of loans 1 1 — — — — Recorded balance $ 47 47 — — — — Nine Months ended September 30, 2017 (Dollars in thousands) Total Residential Real Estate Commercial Real Estate Other Commercial Home Equity Other Consumer TDRs that occurred during the period Number of loans 22 4 7 8 2 1 Pre-modification recorded balance $ 22,912 652 13,003 9,069 178 10 Post-modification recorded balance $ 20,230 652 10,321 9,069 178 10 TDRs that subsequently defaulted Number of loans 1 — — 1 — — Recorded balance $ 18 — — 18 — —

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in the carrying value of goodwill	The following schedule discloses the changes in the carrying value of goodwill: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Net carrying value at beginning of period $ 289,535 177,811 177,811 147,053 Acquisitions — — 111,724 30,758 Net carrying value at end of period $ 289,535 177,811 289,535 177,811

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Carrying amounts of consolidated VIEs' assets and liabilities	The following table summarizes the carrying amounts of the consolidated VIEs’ assets and liabilities included in the Company’s statements of financial condition and are adjusted for intercompany eliminations. All assets presented can be used only to settle obligations of the consolidated VIEs and all liabilities presented consist of liabilities for which creditors and other beneficial interest holders therein have no recourse to the general credit of the Company. (Dollars in thousands) September 30, December 31, Assets Loans receivable $ 73,862 57,796 Accrued interest receivable 157 94 Other assets 41,811 15,885 Total assets $ 115,830 73,775 Liabilities Other borrowed funds $ 9,743 7,964 Accrued interest payable 14 1 Other liabilities 30 98 Total liabilities $ 9,787 8,063
Amortization expense and tax credits and other tax benefits recognized for qualified affordable housing project investments	The following table summarizes the amortization expense and the amount of tax credits and other tax benefits recognized for qualified affordable housing project investments during the periods presented. Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Amortization expense $ 1,177 682 3,098 1,825 Tax credits and other tax benefits recognized 1,651 1,040 4,314 2,792

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	9 Months Ended
	Sep. 30, 2018
Transfers and Servicing [Abstract]
Carrying Value of Repurchase Agreements	The following tables summarize the carrying value of the Company’s repurchase agreements by remaining contractual maturity and category of collateral: September 30, 2018 Remaining Contractual Maturity of the Agreements (Dollars in thousands) Overnight and Continuous 30 - 90 Days Greater Than 90 Days Total State and local governments $ 19,188 — 39,461 58,649 Residential mortgage-backed securities 349,157 — — 349,157 Commercial mortgage-backed securities 948 — — 948 Total $ 369,293 — 39,461 408,754 December 31, 2017 Remaining Contractual Maturity of the Agreements (Dollars in thousands) Overnight and Continuous 30 - 90 Days Greater Than 90 Days Total Residential mortgage-backed securities $ 360,751 — — 360,751 Commercial mortgage-backed securities 1,822 — — 1,822 Total $ 362,573 — — 362,573

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of interest rate swap derivative financial instruments	As of September 30, 2018 , the Company’s interest rate swap derivative financial instruments were designated as cash flow hedges and are summarized as follows: (Dollars in thousands) Forecasted Notional Amount Variable Interest Rate 1 Fixed Interest Rate 1 Payment Term Interest rate swap $ 160,000 3 month LIBOR 3.378 % Oct. 21, 2014 - Oct. 21, 2021 Interest rate swap 100,000 3 month LIBOR 2.498 % Nov. 30, 2015 - Nov. 30, 2022 ______________________________ 1 The Company pays the fixed interest rate and the counterparty pays the Company the variable interest rate.
Summary of Pre-Tax Gains or Losses	The following table presents the pre-tax gains or losses recorded in OCI and the Company’s statements of operations relating to the interest rate swap derivative financial instruments: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Interest rate swaps Amount of gain (loss) recognized in OCI (effective portion) $ 1,234 45 7,302 (1,799 ) Amount of loss reclassified from OCI to interest expense (469 ) (1,182 ) (1,946 ) (3,776 ) Amount of loss recognized in other non-interest expense (ineffective portion) — — — —
Offsetting assets	The following table discloses the offsetting of financial assets and interest rate swap derivative assets. September 30, 2018 December 31, 2017 (Dollars in thousands) Gross Amount of Recognized Assets Gross Amount Offset in the Statements of Financial Position Net Amounts of Assets Presented in the Statements of Financial Position Gross Amount of Recognized Assets Gross Amount Offset in the Statements of Financial Position Net Amounts of Assets Presented in the Statements of Financial Position Interest rate swaps $ 2,006 (2,006 ) — — — —
Offsetting liabilities	The following table discloses the offsetting of financial liabilities and interest rate swap derivative liabilities. September 30, 2018 December 31, 2017 (Dollars in thousands) Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statements of Financial Position Net Amounts of Liabilities Presented in the Statements of Financial Position Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statements of Financial Position Net Amounts of Liabilities Presented in the Statements of Financial Position Interest rate swaps $ 2,148 (2,006 ) 142 9,389 — 9,389

Other Expenses (Tables)

Other Expenses (Tables)	9 Months Ended
	Sep. 30, 2018
Other Expenses [Abstract]
Schedule of Other Expenses	Other expenses consists of the following: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Mergers and acquisition expenses $ 1,336 245 6,098 1,194 Consulting and outside services 1,986 1,247 5,160 3,651 Telephone 1,187 988 3,350 2,899 Debit card expenses 533 1,840 3,321 5,352 Employee expenses 1,089 1,055 3,022 2,969 Loan expenses 947 653 2,735 2,266 VIE amortization and other expenses 1,118 1,041 2,530 2,453 Postage 772 646 2,327 2,007 Printing and supplies 769 605 2,252 1,913 Business development 672 641 1,782 1,434 Legal fees 464 319 1,245 825 Accounting and audit fees 383 499 1,194 1,508 ATM expenses 293 641 927 1,335 Checking and operating expenses 404 564 871 1,291 Other 1,165 1,214 3,516 3,026 Total other expenses $ 13,118 12,198 40,330 34,123

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Activity within Accumulated Other Comprehensive Loss, Net of Tax	The following table illustrates the activity within accumulated other comprehensive loss by component, net of tax: (Dollars in thousands) Gains (Losses) on Available-For-Sale Debt Securities Losses on Derivatives Used for Cash Flow Hedges Total Balance at December 31, 2016 $ 1,639 (9,021 ) (7,382 ) Other comprehensive income (loss) before reclassifications 10,520 (1,102 ) 9,418 Reclassification adjustments for losses included in net income 318 2,313 2,631 Net current period other comprehensive income 10,838 1,211 12,049 Balance at September 30, 2017 $ 12,477 (7,810 ) 4,667 Balance at December 31, 2017 $ 5,031 (7,010 ) (1,979 ) Other comprehensive (loss) income before reclassifications (34,789 ) 5,452 (29,337 ) Reclassification adjustments for losses included in net income 146 1,453 1,599 Net current period other comprehensive (loss) income (34,643 ) 6,905 (27,738 ) Balance at September 30, 2018 $ (29,612 ) (105 ) (29,717 )

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Basic and diluted earnings per share	Basic and diluted earnings per share has been computed based on the following: Three Months ended Nine Months ended (Dollars in thousands, except per share data) September 30, September 30, September 30, September 30, Net income available to common stockholders, basic and diluted $ 49,336 36,479 132,279 101,421 Average outstanding shares - basic 84,518,407 78,004,450 83,294,111 77,379,514 Add: dilutive restricted stock awards and stock options 74,715 61,492 68,212 63,430 Average outstanding shares - diluted 84,593,122 78,065,942 83,362,323 77,442,944 Basic earnings per share $ 0.58 0.47 1.59 1.31 Diluted earnings per share $ 0.58 0.47 1.59 1.31

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair value measurement of assets and liabilities measured at fair value on a recurring basis	The following tables disclose the fair value measurement of assets and liabilities measured at fair value on a recurring basis: Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Fair Value September 30, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Debt securities, available-for-sale U.S. government and federal agency $ 25,267 — 25,267 — U.S. government sponsored enterprises 118,550 — 118,550 — State and local governments 644,014 — 644,014 — Corporate bonds 305,225 — 305,225 — Residential mortgage-backed securities 826,164 — 826,164 — Commercial mortgage-backed securities 184,399 — 184,399 — Loans held for sale, at fair value 50,649 — 50,649 — Total assets measured at fair value on a recurring basis $ 2,154,268 — 2,154,268 — Interest rate swaps $ 142 — 142 — Total liabilities measured at fair value on a recurring basis $ 142 — 142 — Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Fair Value December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Debt securities, available-for-sale U.S. government and federal agency $ 31,127 — 31,127 — U.S. government sponsored enterprises 19,091 — 19,091 — State and local governments 629,501 — 629,501 — Corporate bonds 216,762 — 216,762 — Residential mortgage-backed securities 779,283 — 779,283 — Commercial mortgage-backed securities 102,479 — 102,479 — Loans held for sale, at fair value 38,833 — 38,833 — Total assets measured at fair value on a recurring basis $ 1,817,076 — 1,817,076 — Interest rate swaps $ 9,389 — 9,389 — Total liabilities measured at fair value on a recurring basis $ 9,389 — 9,389 —
Fair value measurement of assets measured at fair value on a non-recurring basis	The following tables disclose the fair value measurement of assets with a recorded change during the period resulting from re-measuring the assets at fair value on a non-recurring basis: Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Fair Value September 30, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other real estate owned $ 3,457 — — 3,457 Collateral-dependent impaired loans, net of ALLL 9,257 — — 9,257 Total assets measured at fair value on a non-recurring basis $ 12,714 — — 12,714 Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Fair Value December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other real estate owned $ 2,296 — — 2,296 Collateral-dependent impaired loans, net of ALLL 6,339 — — 6,339 Total assets measured at fair value on a non-recurring basis $ 8,635 — — 8,635
Quantitative information about assets measured at fair value on a non-recurring basis for which Level 3 inputs were used	The following tables present additional quantitative information about assets measured at fair value on a non-recurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Fair Value September 30, 2018 Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands) Valuation Technique Unobservable Input Range (Weighted-Average) 1 Other real estate owned $ 3,457 Sales comparison approach Selling costs 7.0% - 15.0% (7.5%) Collateral-dependent impaired loans, net of ALLL $ 13 Cost approach Selling costs 20.0% - 20.0% (20.0%) 4,197 Sales comparison approach Selling costs 8.0% - 20.0% (10.4%) 5,047 Combined approach Selling costs 10.0% - 10.0% (10.0%) $ 9,257 Fair Value December 31, 2017 Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands) Valuation Technique Unobservable Input Range (Weighted-Average) 1 Other real estate owned $ 2,296 Sales comparison approach Selling costs 0.0% - 10.0% (6.0%) Collateral-dependent impaired loans, net of ALLL $ 238 Cost approach Selling costs 10.0% - 20.0% (10.6%) 2,541 Sales comparison approach Selling costs 8.0% - 10.0% (9.4%) 3,560 Combined approach Selling costs 10.0% - 10.0% (10.0%) $ 6,339 ______________________________ 1 The range for selling cost inputs represents reductions to the fair value of the assets.
Carrying amounts and estimated fair values of financial instruments not carried at fair value	The following tables present the carrying amounts, estimated fair values and the level within the fair value hierarchy of the Company’s financial instruments not carried at fair value. Receivables and payables due in one year or less, equity securities without readily determinable fair values and deposits with no defined or contractual maturities are excluded. Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Carrying Amount September 30, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets Cash and cash equivalents $ 307,104 307,104 — — Debt securities, held-to-maturity 590,915 — 583,557 — Loans receivable, net of ALLL 7,990,710 — — 8,002,596 Total financial assets $ 8,888,729 307,104 583,557 8,002,596 Financial liabilities Term deposits $ 1,083,882 — 1,085,035 — FHLB advances 155,328 — 155,281 — Repurchase agreements and other borrowed funds 418,698 — 418,699 — Subordinated debentures 134,055 — 123,363 — Total financial liabilities $ 1,791,963 — 1,782,378 — Fair Value Measurements At the End of the Reporting Period Using (Dollars in thousands) Carrying Amount December 31, 2017 Quoted Prices Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets Cash and cash equivalents $ 200,004 200,004 — — Debt securities, held-to-maturity 648,313 — 660,086 — Loans receivable, net of ALLL 6,448,256 — 6,219,515 114,771 Total financial assets $ 7,296,573 200,004 6,879,601 114,771 Financial liabilities Term deposits $ 977,302 — 978,803 — FHLB advances 353,995 — 352,886 — Repurchase agreements and other borrowed funds 370,797 — 370,797 — Subordinated debentures 126,135 — 98,023 — Total financial liabilities $ 1,828,229 — 1,800,509 —

Mergers and Acquisitions (Table

Mergers and Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Consideration transferred, identifiable net assets acquired and resulting goodwill	The following table discloses the preliminary fair value estimates of the consideration transferred, the total identifiable net assets acquired and the resulting goodwill arising from the FSB and Collegiate acquisitions. The Company is continuing to obtain information to determine the fair values of the acquired assets and liabilities. FSB Collegiate (Dollars in thousands) February 28, January 31, Fair value of consideration transferred Fair value of Company shares issued, net of equity issuance costs $ 181,043 69,764 Cash consideration for outstanding shares — 16,265 Effective settlement of a pre-existing relationship — 10,054 Total fair value of consideration transferred 181,043 96,083 Recognized amounts of identifiable assets acquired and liabilities assumed Identifiable assets acquired Cash and cash equivalents 24,397 93,136 Debt securities 271,865 42,177 Loans receivable 627,767 354,252 Core deposit intangible 1 31,053 10,275 Accrued income and other assets 78,325 15,911 Total identifiable assets acquired 1,033,407 515,751 Liabilities assumed Deposits 877,586 437,171 Borrowings 2 36,880 12,509 Accrued expenses and other liabilities 14,175 5,435 Total liabilities assumed 928,641 455,115 Total identifiable net assets 104,766 60,636 Goodwill recognized $ 76,277 35,447 ______________________________ 1 The core deposit intangible for each acquisition was determined to have an estimated life of 10 years . 2 Borrowings assumed with the FSB acquisition include Tier 2 subordinated debentures of $7,903,000 .
Unaudited Pro Forma Summary of the Company as if the Acquisitions had Occurred at the Beginning of the Period	The following unaudited pro forma summary presents consolidated information of the Company as if the FSB and Collegiate acquisitions had occurred on January 1, 2017: Three Months ended Nine Months ended (Dollars in thousands) September 30, September 30, September 30, September 30, Net interest income and non-interest income $ 146,161 135,768 416,611 385,875 Net income 49,336 41,623 127,668 116,174

Nature of Operations and Summ_3

Nature of Operations and Summary of Significant Accounting Policies (Details Textual)	9 Months Ended
	Sep. 30, 2018USD ($)quarterstepoperating_segmentdivision	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Number of Bank Divisions | division	14
Number of Operating Segments | operating_segment	1
Minimum Period Past Due to Consider Loan as Delinquent	30 days
Minimum Period Past Due to Consider Loan as Non Accrual	90 days
Number of Quarters Used to Evaluate Historical Loss Experience | quarter	12
Revenue from Contracts with Customers	$ 56,519,000	$ 52,058,000
Impairment losses on receivables related to contracts with customers	$ 0		$ 0
Number of Steps to Achieve Core Revenue Recognition Principal | step	5
Accounting Standards Update 2017-08
Effect of cumulative change on retained earnings from applying new accounting pronouncement	$ 22,612,000
Consumer and Other
Minimum Number of Days Delinquent to Charge off Loans	120 days
Minimum Range
Number of years for home equity loan origination term	10 years
Maximum Range
Number of years for home equity loan origination term	15 years

Amortized Cost, Gross Unrealize

Amortized Cost, Gross Unrealized Gains and Losses and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available-for-sale
Amortized Cost	$ 2,143,282	$ 1,771,504
Gross Unrealized Gains	10,983	22,433
Gross Unrealized Losses	(50,646)	(15,694)
Fair Value	2,103,619	1,778,243
Held-to-maturity
Amortized Cost	590,915	648,313
Gross Unrealized Gains	7,482	20,346
Gross Unrealized Losses	(14,840)	(8,573)
Fair Value	583,557	660,086
Total
Amortized Cost	2,734,197	2,419,817
Gross Unrealized Gains	18,465	42,779
Gross Unrealized Losses	(65,486)	(24,267)
Fair Value	2,687,176	2,438,329
U.S. government and federal agency
Available-for-sale
Amortized Cost	25,363	31,216
Gross Unrealized Gains	64	54
Gross Unrealized Losses	(160)	(143)
Fair Value	25,267	31,127
U.S. government sponsored enterprises
Available-for-sale
Amortized Cost	120,498	19,195
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,948)	(104)
Fair Value	118,550	19,091
State and local governments
Available-for-sale
Amortized Cost	647,908	614,366
Gross Unrealized Gains	10,040	20,299
Gross Unrealized Losses	(13,934)	(5,164)
Fair Value	644,014	629,501
Held-to-maturity
Amortized Cost	590,915	648,313
Gross Unrealized Gains	7,482	20,346
Gross Unrealized Losses	(14,840)	(8,573)
Fair Value	583,557	660,086
Corporate bonds
Available-for-sale
Amortized Cost	306,057	216,443
Gross Unrealized Gains	696	802
Gross Unrealized Losses	(1,528)	(483)
Fair Value	305,225	216,762
Residential mortgage-backed securities
Available-for-sale
Amortized Cost	855,183	785,960
Gross Unrealized Gains	183	1,253
Gross Unrealized Losses	(29,202)	(7,930)
Fair Value	826,164	779,283
Commercial mortgage-backed securities
Available-for-sale
Amortized Cost	188,273	104,324
Gross Unrealized Gains	0	25
Gross Unrealized Losses	(3,874)	(1,870)
Fair Value	$ 184,399	$ 102,479

Debt Securities Maturity Schedu

Debt Securities Maturity Schedule (Details) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Available-for-Sale, Amortized Cost
Due within one year		$ 151,030
Due after one year through five years		322,470
Due after five years through ten years		284,496
Due after ten years		341,830
Total before mortgage-backed securities		1,099,826
Total		2,143,282	$ 1,771,504
Available-for-Sale, Fair Value
Due within one year		150,658
Due after one year through five years		319,836
Due after five years through ten years		285,279
Due after ten years		337,283
Total before mortgage-backed securities		1,093,056
Debt securities, available-for-sale		2,103,619	1,778,243
Held-to-Maturity, Amortized Cost
Due within one year		0
Due after one year through five years		4,551
Due after five years through ten years		108,553
Due after ten years		477,811
Total before mortgage-backed securities		590,915
Amortized Cost		590,915	648,313
Held-to-Maturity, Fair Value
Due within one year		0
Due after one year through five years		4,555
Due after five years through ten years		106,980
Due after ten years		472,022
Total before mortgage-backed securities		583,557
Total		583,557	$ 660,086
Mortgage-backed securities
Available-for-Sale, Amortized Cost
Mortgage-backed securities	[1]	1,043,456
Available-for-Sale, Fair Value
Mortgage-backed securities	[1]	1,010,563
Held-to-Maturity, Amortized Cost
Mortgage-backed securities	[1]	0
Held-to-Maturity, Fair Value
Mortgage-backed securities	[1]	$ 0
[1]	Mortgage-backed securities, which have prepayment provisions, are not assigned to maturity categories due to fluctuations in their prepayment speeds.

Proceeds From Sales and Calls o

Proceeds From Sales and Calls of Debt Securities and Associates Gains or Losses (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Available-for-sale
Sales of available-for-sale debt securities		$ 12,135	$ 155,894	$ 245,581	$ 268,557
Gross realized gains	[1]	188	278	203	3,345
Gross realized losses	[1]	(37)	(201)	(398)	(3,864)
Held-to-maturity
Proceeds from calls of debt securities		28,435	3,675	57,370	18,910
Gross realized gains	[1]	12	0	76	153
Gross realized losses	[1]	$ (530)	$ 0	$ (637)	$ (179)
[1]	The gain or loss on the sale or call of each debt security is determined by the specific identification method.

Debt Securities with an Unreali

Debt Securities with an Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available-for-sale, Fair Value
Less than 12 Months	$ 941,082	$ 586,721
12 Months or More	767,366	484,508
Total	1,708,448	1,071,229
Available-for-sale, Unrealized Loss
Less than 12 Months	(15,235)	(4,533)
12 Months or More	(35,411)	(11,161)
Total	(50,646)	(15,694)
Held-to-maturity, Fair Value
Less than 12 Months	201,181	21,207
12 Months or More	90,502	105,486
Total	291,683	126,693
Held-to-maturity, Unrealized Loss
Less than 12 Months	(6,234)	(186)
12 Months or More	(8,606)	(8,387)
Total	(14,840)	(8,573)
U.S. government and federal agency
Available-for-sale, Fair Value
Less than 12 Months	6,553	1,208
12 Months or More	8,887	13,179
Total	15,440	14,387
Available-for-sale, Unrealized Loss
Less than 12 Months	(28)	(5)
12 Months or More	(132)	(138)
Total	(160)	(143)
U.S. government sponsored enterprises
Available-for-sale, Fair Value
Less than 12 Months	112,590	14,926
12 Months or More	5,960	3,425
Total	118,550	18,351
Available-for-sale, Unrealized Loss
Less than 12 Months	(1,791)	(56)
12 Months or More	(157)	(48)
Total	(1,948)	(104)
State and local governments
Available-for-sale, Fair Value
Less than 12 Months	215,703	61,126
12 Months or More	145,908	121,181
Total	361,611	182,307
Available-for-sale, Unrealized Loss
Less than 12 Months	(4,959)	(689)
12 Months or More	(8,975)	(4,475)
Total	(13,934)	(5,164)
Held-to-maturity, Fair Value
Less than 12 Months	201,181	21,207
12 Months or More	90,502	105,486
Total	291,683	126,693
Held-to-maturity, Unrealized Loss
Less than 12 Months	(6,234)	(186)
12 Months or More	(8,606)	(8,387)
Total	(14,840)	(8,573)
Corporate bonds
Available-for-sale, Fair Value
Less than 12 Months	173,308	99,636
12 Months or More	60,862	29,034
Total	234,170	128,670
Available-for-sale, Unrealized Loss
Less than 12 Months	(820)	(264)
12 Months or More	(708)	(219)
Total	(1,528)	(483)
Residential mortgage-backed securities
Available-for-sale, Fair Value
Less than 12 Months	328,829	372,175
12 Months or More	471,471	254,721
Total	800,300	626,896
Available-for-sale, Unrealized Loss
Less than 12 Months	(6,397)	(3,050)
12 Months or More	(22,805)	(4,880)
Total	(29,202)	(7,930)
Commercial mortgage-backed securities
Available-for-sale, Fair Value
Less than 12 Months	104,099	37,650
12 Months or More	74,278	62,968
Total	178,377	100,618
Available-for-sale, Unrealized Loss
Less than 12 Months	(1,240)	(469)
12 Months or More	(2,634)	(1,401)
Total	$ (3,874)	$ (1,870)

Debt Securities (Details Textua

Debt Securities (Details Textual) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Other-than-temporary impairment on debt securities	$ 0	$ 0

Loans Receivable, Net Summary o

Loans Receivable, Net Summary of Loans Receivable (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Summary of Loans Receivable
Loans receivable	$ 8,123,245	$ 6,577,824
Allowance for loan and lease losses	(132,535)	(129,568)
Loans receivable, net	7,990,710	6,448,256
Net deferred origination (fees) costs included in loans receivable	(4,876)	(2,643)
Net purchase accounting (discounts) premiums included in loans receivable	$ (26,601)	$ (16,325)
Weighted-average interest rate on loans (tax-equivalent)	4.94%	4.81%
Residential Real Estate | Residential Real Estate
Summary of Loans Receivable
Loans receivable	$ 862,830	$ 720,728
Allowance for loan and lease losses	(10,754)	(10,798)
Commercial
Summary of Loans Receivable
Loans receivable	6,449,532	5,156,492
Commercial | Commercial Real Estate
Summary of Loans Receivable
Loans receivable	4,527,577	3,577,139
Allowance for loan and lease losses	(73,566)	(68,515)
Commercial | Other Commercial
Summary of Loans Receivable
Loans receivable	1,921,955	1,579,353
Allowance for loan and lease losses	(37,957)	(39,303)
Consumer and Other
Summary of Loans Receivable
Loans receivable	810,883	700,604
Consumer and Other | Home Equity
Summary of Loans Receivable
Loans receivable	528,404	457,918
Allowance for loan and lease losses	(5,928)	(6,204)
Consumer and Other | Other Consumer
Summary of Loans Receivable
Loans receivable	282,479	242,686
Allowance for loan and lease losses	$ (4,330)	$ (4,748)

ALLL Activity (Details)

ALLL Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Allowance for loan and lease losses
Balance at beginning of period	$ 131,564	$ 129,877	$ 129,568	$ 129,572
Provision for loan losses	3,194	3,327	8,707	7,938
Charge-offs	(4,294)	(5,983)	(11,905)	(14,801)
Recoveries	2,071	2,355	6,165	6,867
Balance at end of period	132,535	129,576	132,535	129,576
Residential Real Estate | Residential Real Estate
Allowance for loan and lease losses
Balance at beginning of period	10,903	11,522	10,798	12,436
Provision for loan losses	54	(10)	135	(946)
Charge-offs	(210)	(44)	(257)	(87)
Recoveries	7	12	78	77
Balance at end of period	10,754	11,480	10,754	11,480
Commercial | Commercial Real Estate
Allowance for loan and lease losses
Balance at beginning of period	71,245	68,503	68,515	65,773
Provision for loan losses	2,922	2,214	5,941	6,403
Charge-offs	(909)	(3,227)	(2,132)	(5,261)
Recoveries	308	735	1,242	1,310
Balance at end of period	73,566	68,225	73,566	68,225
Commercial | Other Commercial
Allowance for loan and lease losses
Balance at beginning of period	38,664	36,984	39,303	37,823
Provision for loan losses	(257)	696	415	551
Charge-offs	(897)	(374)	(3,325)	(1,855)
Recoveries	447	514	1,564	1,301
Balance at end of period	37,957	37,820	37,957	37,820
Consumer and Other | Home Equity
Allowance for loan and lease losses
Balance at beginning of period	6,092	7,662	6,204	7,572
Provision for loan losses	(165)	(682)	(359)	(324)
Charge-offs	(82)	(15)	(101)	(458)
Recoveries	83	16	184	191
Balance at end of period	5,928	6,981	5,928	6,981
Consumer and Other | Other Consumer
Allowance for loan and lease losses
Balance at beginning of period	4,660	5,206	4,748	5,968
Provision for loan losses	640	1,109	2,575	2,254
Charge-offs	(2,196)	(2,323)	(6,090)	(7,140)
Recoveries	1,226	1,078	3,097	3,988
Balance at end of period	$ 4,330	$ 5,070	$ 4,330	$ 5,070

ALLL and Loans Receivable Summa

ALLL and Loans Receivable Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Allowance for Loan and Lease Losses and Loans Receivable
Individually evaluated for impairment	$ 123,576	$ 119,994
Collectively evaluated for impairment	7,999,669	6,457,830
Total loans receivable	8,123,245	6,577,824
Individually evaluated for impairment	1,690	5,223
Collectively evaluated for impairment	130,845	124,345
Total allowance for loan and lease losses	132,535	129,568
Residential Real Estate | Residential Real Estate
Allowance for Loan and Lease Losses and Loans Receivable
Individually evaluated for impairment	14,007	12,399
Collectively evaluated for impairment	848,823	708,329
Total loans receivable	862,830	720,728
Individually evaluated for impairment	83	246
Collectively evaluated for impairment	10,671	10,552
Total allowance for loan and lease losses	10,754	10,798
Commercial
Allowance for Loan and Lease Losses and Loans Receivable
Total loans receivable	6,449,532	5,156,492
Commercial | Commercial Real Estate
Allowance for Loan and Lease Losses and Loans Receivable
Individually evaluated for impairment	81,170	77,536
Collectively evaluated for impairment	4,446,407	3,499,603
Total loans receivable	4,527,577	3,577,139
Individually evaluated for impairment	650	500
Collectively evaluated for impairment	72,916	68,015
Total allowance for loan and lease losses	73,566	68,515
Commercial | Other Commercial
Allowance for Loan and Lease Losses and Loans Receivable
Individually evaluated for impairment	21,973	23,032
Collectively evaluated for impairment	1,899,982	1,556,321
Total loans receivable	1,921,955	1,579,353
Individually evaluated for impairment	687	3,851
Collectively evaluated for impairment	37,270	35,452
Total allowance for loan and lease losses	37,957	39,303
Consumer and Other
Allowance for Loan and Lease Losses and Loans Receivable
Total loans receivable	810,883	700,604
Consumer and Other | Home Equity
Allowance for Loan and Lease Losses and Loans Receivable
Individually evaluated for impairment	3,569	3,755
Collectively evaluated for impairment	524,835	454,163
Total loans receivable	528,404	457,918
Individually evaluated for impairment	5	56
Collectively evaluated for impairment	5,923	6,148
Total allowance for loan and lease losses	5,928	6,204
Consumer and Other | Other Consumer
Allowance for Loan and Lease Losses and Loans Receivable
Individually evaluated for impairment	2,857	3,272
Collectively evaluated for impairment	279,622	239,414
Total loans receivable	282,479	242,686
Individually evaluated for impairment	265	570
Collectively evaluated for impairment	4,065	4,178
Total allowance for loan and lease losses	$ 4,330	$ 4,748

Impaired Loans (Details)

Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Summary of the impaired loans by portfolio class of loans
Loans with a specific valuation allowance, Recorded balance	$ 20,021	$ 20,021	$ 17,689
Loans with a specific valuation allowance, Unpaid principal balance	20,327	20,327	18,400
Specific valuation allowance	1,690	1,690	5,223
Loans with a specific valuation allowance, Average balance	18,267	19,599	18,986
Loans without a specific valuation allowance, Recorded balance	103,555	103,555	102,305
Loans without a specific valuation allowance, Unpaid principal balance	125,552	125,552	122,833
Loans without a specific valuation allowance, Average balance	113,734	111,037	107,945
Recorded balance	123,576	123,576	119,994
Unpaid principal balance	145,879	145,879	141,233
Average balance	132,001	130,636	126,931
Residential Real Estate | Residential Real Estate
Summary of the impaired loans by portfolio class of loans
Loans with a specific valuation allowance, Recorded balance	2,367	2,367	2,978
Loans with a specific valuation allowance, Unpaid principal balance	2,442	2,442	3,046
Specific valuation allowance	83	83	246
Loans with a specific valuation allowance, Average balance	2,434	2,868	2,928
Loans without a specific valuation allowance, Recorded balance	11,640	11,640	9,421
Loans without a specific valuation allowance, Unpaid principal balance	12,845	12,845	10,380
Loans without a specific valuation allowance, Average balance	10,783	10,154	9,834
Recorded balance	14,007	14,007	12,399
Unpaid principal balance	15,287	15,287	13,426
Average balance	13,217	13,022	12,762
Commercial | Commercial Real Estate
Summary of the impaired loans by portfolio class of loans
Loans with a specific valuation allowance, Recorded balance	9,843	9,843	4,545
Loans with a specific valuation allowance, Unpaid principal balance	10,043	10,043	4,573
Specific valuation allowance	650	650	500
Loans with a specific valuation allowance, Average balance	10,005	8,286	5,851
Loans without a specific valuation allowance, Recorded balance	71,327	71,327	72,991
Loans without a specific valuation allowance, Unpaid principal balance	88,290	88,290	89,839
Loans without a specific valuation allowance, Average balance	76,027	77,489	76,427
Recorded balance	81,170	81,170	77,536
Unpaid principal balance	98,333	98,333	94,412
Average balance	86,032	85,775	82,278
Commercial | Other Commercial
Summary of the impaired loans by portfolio class of loans
Loans with a specific valuation allowance, Recorded balance	6,878	6,878	8,183
Loans with a specific valuation allowance, Unpaid principal balance	6,878	6,878	8,378
Specific valuation allowance	687	687	3,851
Loans with a specific valuation allowance, Average balance	4,775	7,034	8,477
Loans without a specific valuation allowance, Recorded balance	15,095	15,095	14,849
Loans without a specific valuation allowance, Unpaid principal balance	18,245	18,245	16,931
Loans without a specific valuation allowance, Average balance	21,604	18,293	15,129
Recorded balance	21,973	21,973	23,032
Unpaid principal balance	25,123	25,123	25,309
Average balance	26,379	25,327	23,606
Consumer and Other | Home Equity
Summary of the impaired loans by portfolio class of loans
Loans with a specific valuation allowance, Recorded balance	38	38	186
Loans with a specific valuation allowance, Unpaid principal balance	38	38	199
Specific valuation allowance	5	5	56
Loans with a specific valuation allowance, Average balance	19	72	359
Loans without a specific valuation allowance, Recorded balance	3,531	3,531	3,569
Loans without a specific valuation allowance, Unpaid principal balance	4,110	4,110	4,098
Loans without a specific valuation allowance, Average balance	3,560	3,488	4,734
Recorded balance	3,569	3,569	3,755
Unpaid principal balance	4,148	4,148	4,297
Average balance	3,579	3,560	5,093
Consumer and Other | Other Consumer
Summary of the impaired loans by portfolio class of loans
Loans with a specific valuation allowance, Recorded balance	895	895	1,797
Loans with a specific valuation allowance, Unpaid principal balance	926	926	2,204
Specific valuation allowance	265	265	570
Loans with a specific valuation allowance, Average balance	1,034	1,339	1,371
Loans without a specific valuation allowance, Recorded balance	1,962	1,962	1,475
Loans without a specific valuation allowance, Unpaid principal balance	2,062	2,062	1,585
Loans without a specific valuation allowance, Average balance	1,760	1,613	1,821
Recorded balance	2,857	2,857	3,272
Unpaid principal balance	2,988	2,988	3,789
Average balance	$ 2,794	$ 2,952	$ 3,192

Loans Receivable Aging Analysis

Loans Receivable Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loan portfolio aging analysis
Non-accrual loans	$ 55,373	$ 44,833
Total past due and non-accrual loans	84,887	88,597
Current loans receivable	8,038,358	6,489,227
Total loans receivable	8,123,245	6,577,824
Accruing loans 30 to 59 days past due
Loan portfolio aging analysis
Past due loans	13,973	26,375
Accruing loans 60 to 89 days past due
Loan portfolio aging analysis
Past due loans	11,208	11,312
Accruing loans 90 days or more past due
Loan portfolio aging analysis
Past due loans	4,333	6,077
Residential Real Estate | Residential Real Estate
Loan portfolio aging analysis
Non-accrual loans	7,855	4,924
Total past due and non-accrual loans	16,827	14,336
Current loans receivable	846,003	706,392
Total loans receivable	862,830	720,728
Residential Real Estate | Residential Real Estate | Accruing loans 30 to 59 days past due
Loan portfolio aging analysis
Past due loans	667	6,252
Residential Real Estate | Residential Real Estate | Accruing loans 60 to 89 days past due
Loan portfolio aging analysis
Past due loans	6,242	794
Residential Real Estate | Residential Real Estate | Accruing loans 90 days or more past due
Loan portfolio aging analysis
Past due loans	2,063	2,366
Commercial
Loan portfolio aging analysis
Total loans receivable	6,449,532	5,156,492
Commercial | Commercial Real Estate
Loan portfolio aging analysis
Non-accrual loans	34,267	27,331
Total past due and non-accrual loans	41,343	45,853
Current loans receivable	4,486,234	3,531,286
Total loans receivable	4,527,577	3,577,139
Commercial | Commercial Real Estate | Accruing loans 30 to 59 days past due
Loan portfolio aging analysis
Past due loans	5,621	12,546
Commercial | Commercial Real Estate | Accruing loans 60 to 89 days past due
Loan portfolio aging analysis
Past due loans	989	5,367
Commercial | Commercial Real Estate | Accruing loans 90 days or more past due
Loan portfolio aging analysis
Past due loans	466	609
Commercial | Other Commercial
Loan portfolio aging analysis
Non-accrual loans	9,833	8,298
Total past due and non-accrual loans	17,668	18,407
Current loans receivable	1,904,287	1,560,946
Total loans receivable	1,921,955	1,579,353
Commercial | Other Commercial | Accruing loans 30 to 59 days past due
Loan portfolio aging analysis
Past due loans	4,325	3,634
Commercial | Other Commercial | Accruing loans 60 to 89 days past due
Loan portfolio aging analysis
Past due loans	2,049	3,502
Commercial | Other Commercial | Accruing loans 90 days or more past due
Loan portfolio aging analysis
Past due loans	1,461	2,973
Consumer and Other
Loan portfolio aging analysis
Total loans receivable	810,883	700,604
Consumer and Other | Home Equity
Loan portfolio aging analysis
Non-accrual loans	2,924	3,338
Total past due and non-accrual loans	5,917	6,467
Current loans receivable	522,487	451,451
Total loans receivable	528,404	457,918
Consumer and Other | Home Equity | Accruing loans 30 to 59 days past due
Loan portfolio aging analysis
Past due loans	1,856	2,142
Consumer and Other | Home Equity | Accruing loans 60 to 89 days past due
Loan portfolio aging analysis
Past due loans	1,015	987
Consumer and Other | Home Equity | Accruing loans 90 days or more past due
Loan portfolio aging analysis
Past due loans	122	0
Consumer and Other | Other Consumer
Loan portfolio aging analysis
Non-accrual loans	494	942
Total past due and non-accrual loans	3,132	3,534
Current loans receivable	279,347	239,152
Total loans receivable	282,479	242,686
Consumer and Other | Other Consumer | Accruing loans 30 to 59 days past due
Loan portfolio aging analysis
Past due loans	1,504	1,801
Consumer and Other | Other Consumer | Accruing loans 60 to 89 days past due
Loan portfolio aging analysis
Past due loans	913	662
Consumer and Other | Other Consumer | Accruing loans 90 days or more past due
Loan portfolio aging analysis
Past due loans	$ 221	$ 129

Troubled Debt Restructurings (D

Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)Loan	Sep. 30, 2017USD ($)Loan	Sep. 30, 2018USD ($)Loan	Sep. 30, 2017USD ($)Loan
Troubled Debt Restructurings
TDRs that Occurred During the Period, Number of Loans | Loan	2	5	22	22
TDRs that Occurred During the Period, Pre-modification recorded balance	$ 312	$ 956	$ 21,582	$ 22,912
TDRs that Occurred During the Period, Post-modification recorded balance	$ 312	$ 956	$ 21,468	$ 20,230
TDRs that Subsequently Defaulted, Number of Loans | Loan	1	0	1	1
TDRs that Subsequently Defaulted, Recorded Balance	$ 47	$ 0	$ 47	$ 18
Residential Real Estate | Residential Real Estate
Troubled Debt Restructurings
TDRs that Occurred During the Period, Number of Loans | Loan	0	1	3	4
TDRs that Occurred During the Period, Pre-modification recorded balance	$ 0	$ 317	$ 666	$ 652
TDRs that Occurred During the Period, Post-modification recorded balance	$ 0	$ 317	$ 666	$ 652
TDRs that Subsequently Defaulted, Number of Loans | Loan	1	0	1	0
TDRs that Subsequently Defaulted, Recorded Balance	$ 47	$ 0	$ 47	$ 0
Commercial | Commercial Real Estate
Troubled Debt Restructurings
TDRs that Occurred During the Period, Number of Loans | Loan	0	1	8	7
TDRs that Occurred During the Period, Pre-modification recorded balance	$ 0	$ 386	$ 12,901	$ 13,003
TDRs that Occurred During the Period, Post-modification recorded balance	$ 0	$ 386	$ 12,787	$ 10,321
TDRs that Subsequently Defaulted, Number of Loans | Loan	0	0	0	0
TDRs that Subsequently Defaulted, Recorded Balance	$ 0	$ 0	$ 0	$ 0
Commercial | Other Commercial
Troubled Debt Restructurings
TDRs that Occurred During the Period, Number of Loans | Loan	1	3	8	8
TDRs that Occurred During the Period, Pre-modification recorded balance	$ 7	$ 253	$ 7,458	$ 9,069
TDRs that Occurred During the Period, Post-modification recorded balance	$ 7	$ 253	$ 7,458	$ 9,069
TDRs that Subsequently Defaulted, Number of Loans | Loan	0	0	0	1
TDRs that Subsequently Defaulted, Recorded Balance	$ 0	$ 0	$ 0	$ 18
Consumer and Other | Home Equity
Troubled Debt Restructurings
TDRs that Occurred During the Period, Number of Loans | Loan	0	0	2	2
TDRs that Occurred During the Period, Pre-modification recorded balance	$ 0	$ 0	$ 252	$ 178
TDRs that Occurred During the Period, Post-modification recorded balance	$ 0	$ 0	$ 252	$ 178
TDRs that Subsequently Defaulted, Number of Loans | Loan	0	0	0	0
TDRs that Subsequently Defaulted, Recorded Balance	$ 0	$ 0	$ 0	$ 0
Consumer and Other | Other Consumer
Troubled Debt Restructurings
TDRs that Occurred During the Period, Number of Loans | Loan	1	0	1	1
TDRs that Occurred During the Period, Pre-modification recorded balance	$ 305	$ 0	$ 305	$ 10
TDRs that Occurred During the Period, Post-modification recorded balance	$ 305	$ 0	$ 305	$ 10
TDRs that Subsequently Defaulted, Number of Loans | Loan	0	0	0	0
TDRs that Subsequently Defaulted, Recorded Balance	$ 0	$ 0	$ 0	$ 0

Loans Receivable, Net (Details

Loans Receivable, Net (Details Textual)	9 Months Ended
	Sep. 30, 2018USD ($)portfolio_segment	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)
Loans and Leases Receivable Disclosure
Number of segments in the Company's loan portfolio | portfolio_segment	3
TDR With Pre Modification Loan Balance for Which Oreo Was Received	$ 5,782,000		$ 5,152,000
Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process	791,000	$ 743,000
OREO Secured by Residential Real Estate	$ 2,559,000	$ 893,000

Goodwill Changes in the Carryin

Goodwill Changes in the Carrying Value of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill Roll Forward
Net carrying value at beginning of period	$ 289,535	$ 177,811	$ 177,811	$ 147,053
Acquisitions	0	0	111,724	30,758
Net carrying value at end of period	$ 289,535	$ 177,811	$ 289,535	$ 177,811

Goodwill (Details Textual)

Goodwill (Details Textual) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Accumulated impairment charge	$ 40,159,000	$ 40,159,000

Variable Interest Entities VIE

Variable Interest Entities VIE Carrying Amounts Included in Financial Statements (Details) - Consolidated VIEs - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Consolidated VIEs
Assets	$ 115,830	$ 73,775
Liabilities	9,787	8,063
Loans Receivable
Consolidated VIEs
Assets	73,862	57,796
Accrued Interest Receivable
Consolidated VIEs
Assets	157	94
Other assets
Consolidated VIEs
Assets	41,811	15,885
Other borrowed funds
Consolidated VIEs
Liabilities	9,743	7,964
Accrued interest payable
Consolidated VIEs
Liabilities	14	1
Other liabilities
Consolidated VIEs
Liabilities	$ 30	$ 98

Variable Interest Entities Amor

Variable Interest Entities Amortization Expense and Tax Credits and Other Tax Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Investments in Qualified Affordable Housing Projects
Amortization expense	$ 1,177	$ 682	$ 3,098	$ 1,825
Tax credits and other tax benefits recognized	$ 1,651	$ 1,040	$ 4,314	$ 2,792

Variable Interest Entities (Det

Variable Interest Entities (Details Textual) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Variable Interest Entities
Unfunded contingent commitments	$ 10,293,000
Unfunded contingent commitments expected to be fulfilled in 2018	3,856,000
Unfunded contingent commitments expected to be fulfilled in 2019	6,437,000
Impairment losses	0	$ 0
Other assets
Variable Interest Entities
Carrying value of equity investments in LIHTCs	$ 31,702,000		$ 9,169,000
CDE
Variable Interest Entities
Tax credit period	7 years
LIHTC
Variable Interest Entities
Tax credit period	10 years
Tax credit compliance period	15 years

Carrying Value of Repurchase Ag

Carrying Value of Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	$ 408,754	$ 362,573
Overnight and Continuous
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	369,293	362,573
30 - 90 Days
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	0	0
Greater Than 90 Days
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	39,461	0
State and local governments
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	58,649
State and local governments | Overnight and Continuous
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	19,188
State and local governments | 30 - 90 Days
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	0
State and local governments | Greater Than 90 Days
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	39,461
Residential mortgage-backed securities
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	349,157	360,751
Residential mortgage-backed securities | Overnight and Continuous
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	349,157	360,751
Residential mortgage-backed securities | 30 - 90 Days
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	0	0
Residential mortgage-backed securities | Greater Than 90 Days
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	0	0
Commercial mortgage-backed securities
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	948	1,822
Commercial mortgage-backed securities | Overnight and Continuous
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	948	1,822
Commercial mortgage-backed securities | 30 - 90 Days
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	0	0
Commercial mortgage-backed securities | Greater Than 90 Days
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	$ 0	$ 0

Securities Sold Under Agreeme_3

Securities Sold Under Agreements to Repurchase Securities Sold Under Agreements to Repurchase (Details Textual) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Securities Sold Under Agreements to Repurchase
Repurchase Agreements	$ 408,754,000	$ 362,573,000
Securities Pledged for Repurchase Agreements	$ 489,635,000	$ 475,601,000

Interest Rate Swap Summary (Det

Interest Rate Swap Summary (Details) $ in Thousands	Sep. 30, 2018USD ($)
Interest Rate Swap One
Derivative financial instruments
Forecasted Notional Amount	$ 160,000
Fixed Interest Rate	3.378%	[1]
Interest Rate Swap Two
Derivative financial instruments
Forecasted Notional Amount	$ 100,000
Fixed Interest Rate	2.498%	[1]
[1]	The Company pays the fixed interest rate and the counterparty pays the Company the variable interest rate.

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities Interest Rate Swap Gains or Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pre-Tax Gains or Losses
Unrealized gains (losses) on derivatives used for cash flow hedges	$ 1,234	$ 45	$ 7,302	$ (1,799)
Interest Rate Swaps | Interest Expense
Pre-Tax Gains or Losses
Amount of loss reclassified from OCI to interest expense	(469)	(1,182)	(1,946)	(3,776)
Interest Rate Swaps | Other Non-Interest Expense
Pre-Tax Gains or Losses
Amount of loss recognized in other non-interest expense (ineffective portion)	0	0	0	0
Interest Rate Swaps | Other Comprehensive Income
Pre-Tax Gains or Losses
Unrealized gains (losses) on derivatives used for cash flow hedges	$ 1,234	$ 45	$ 7,302	$ (1,799)

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities Offsetting Assets (Details) - Interest Rate Swaps - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Offsetting Derivative Assets
Gross Amounts of Recognized Assets	$ 2,006	$ 0
Gross Amounts Offset in the Statements of Financial Position	(2,006)	0
Net Amounts of Assets Presented in the Statements of Financial Position	$ 0	$ 0

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities Offsetting Liabilities (Details) - Interest Rate Swaps - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Offsetting Derivative Liabilities
Gross Amounts of Recognized Liabilities	$ 2,148	$ 9,389
Gross Amounts Offset in the Statements of Financial Position	(2,006)	0
Net Amounts of Liabilities Presented in the Statements of Financial Position	$ 142	$ 9,389

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities (Details Textual) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Interest Rate Lock Commitments
Derivative financial instruments
Off-balance Sheet Commitments	$ 97,427,000		$ 67,861,000
Interest Rate Swap One
Derivative financial instruments
Forecasted Notional Amount	160,000,000
Interest Rate Swap Two
Derivative financial instruments
Forecasted Notional Amount	100,000,000
Interest Rate Swaps
Derivative financial instruments
Interest expense recorded on interest rate swap	5,993,000	$ 5,993,000
Unrealized loss to be reclassified within twelve months	1,835,000
Investment securities pledged as collateral	4,935,000
Collateral pledged from the counterparties to the Company	0
Forward commitments to sell TBA securities
Derivative financial instruments
Forecasted Notional Amount	$ 71,000,000

Other Expenses (Details)

Other Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Expenses
Mergers and acquisition expenses	$ 1,336	$ 245	$ 6,098	$ 1,194
Consulting and outside services	1,986	1,247	5,160	3,651
Telephone	1,187	988	3,350	2,899
Debit card expenses	533	1,840	3,321	5,352
Employee expenses	1,089	1,055	3,022	2,969
Loan expenses	947	653	2,735	2,266
VIE amortization and other expenses	1,118	1,041	2,530	2,453
Postage	772	646	2,327	2,007
Printing and supplies	769	605	2,252	1,913
Business development	672	641	1,782	1,434
Legal fees	464	319	1,245	825
Accounting and audit fees	383	499	1,194	1,508
ATM expenses	293	641	927	1,335
Checking and operating expenses	404	564	871	1,291
Other	1,165	1,214	3,516	3,026
Total other expenses	$ 13,118	$ 12,198	$ 40,330	$ 34,123

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Loss
Balance, beginning			$ (1,979)	$ (7,382)
Other comprehensive income (loss) before reclassification			(29,337)	9,418
Reclassification adjustments for losses included in net income			1,599	2,631
Total other comprehensive (loss) income, net of tax	$ (9,435)	$ (1,032)	(27,738)	12,049
Balance, end	(29,717)	4,667	(29,717)	4,667
Available-For-Sale Debt Securities
Accumulated Other Comprehensive Loss
Balance, beginning			5,031	1,639
Other comprehensive income (loss) before reclassification			(34,789)	10,520
Reclassification adjustments for losses included in net income			146	318
Total other comprehensive (loss) income, net of tax			(34,643)	10,838
Balance, end	(29,612)	12,477	(29,612)	12,477
Derivatives Used for Cash Flow Hedges
Accumulated Other Comprehensive Loss
Balance, beginning			(7,010)	(9,021)
Other comprehensive income (loss) before reclassification			5,452	(1,102)
Reclassification adjustments for losses included in net income			1,453	2,313
Total other comprehensive (loss) income, net of tax			6,905	1,211
Balance, end	$ (105)	$ (7,810)	$ (105)	$ (7,810)

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Basic and Diluted Earnings Per Share
Net income available to common stockholders, basic and diluted	$ 49,336	$ 36,479	$ 132,279	$ 101,421
Average outstanding shares - basic	84,518,407	78,004,450	83,294,111	77,379,514
Add: dilutive restricted stock awards and stock options	74,715	61,492	68,212	63,430
Average outstanding shares - diluted	84,593,122	78,065,942	83,362,323	77,442,944
Basic earnings per share	$ 0.58	$ 0.47	$ 1.59	$ 1.31
Diluted earnings per share	$ 0.58	$ 0.47	$ 1.59	$ 1.31
Earnings Per Share
Restricted stock awards and stock options excluded from the diluted average outstanding share calculation			0	0

Fair Value Measurements on a Re

Fair Value Measurements on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial Assets
Debt securities, available-for-sale	$ 2,103,619	$ 1,778,243
Recurring Measurements
Financial Assets
Loans held for sale, at fair value	50,649	38,833
Total assets measured at fair value on a recurring basis	2,154,268	1,817,076
Financial Liabilities
Total liabilities measured at fair value on a recurring basis	142	9,389
Interest Rate Swaps | Recurring Measurements
Financial Liabilities
Derivatives	142	9,389
U.S. government and federal agency | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	25,267	31,127
U.S. government sponsored enterprises | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	118,550	19,091
State and local governments | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	644,014	629,501
Corporate bonds | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	305,225	216,762
Residential mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	826,164	779,283
Commercial mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	184,399	102,479
Level 1 | Recurring Measurements
Financial Assets
Loans held for sale, at fair value	0	0
Total assets measured at fair value on a recurring basis	0	0
Financial Liabilities
Total liabilities measured at fair value on a recurring basis	0	0
Level 1 | Interest Rate Swaps | Recurring Measurements
Financial Liabilities
Derivatives	0	0
Level 1 | U.S. government and federal agency | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | U.S. government sponsored enterprises | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | State and local governments | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | Corporate bonds | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | Residential mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 1 | Commercial mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 2 | Recurring Measurements
Financial Assets
Loans held for sale, at fair value	50,649	38,833
Total assets measured at fair value on a recurring basis	2,154,268	1,817,076
Financial Liabilities
Total liabilities measured at fair value on a recurring basis	142	9,389
Level 2 | Interest Rate Swaps | Recurring Measurements
Financial Liabilities
Derivatives	142	9,389
Level 2 | U.S. government and federal agency | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	25,267	31,127
Level 2 | U.S. government sponsored enterprises | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	118,550	19,091
Level 2 | State and local governments | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	644,014	629,501
Level 2 | Corporate bonds | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	305,225	216,762
Level 2 | Residential mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	826,164	779,283
Level 2 | Commercial mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	184,399	102,479
Level 3 | Recurring Measurements
Financial Assets
Loans held for sale, at fair value	0	0
Total assets measured at fair value on a recurring basis	0	0
Financial Liabilities
Total liabilities measured at fair value on a recurring basis	0	0
Level 3 | Interest Rate Swaps | Recurring Measurements
Financial Liabilities
Derivatives	0	0
Level 3 | U.S. government and federal agency | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | U.S. government sponsored enterprises | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | State and local governments | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | Corporate bonds | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | Residential mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	0	0
Level 3 | Commercial mortgage-backed securities | Recurring Measurements
Financial Assets
Debt securities, available-for-sale	$ 0	$ 0

Fair Value Measurements on a No

Fair Value Measurements on a Non-Recurring Basis (Details) - Non-Recurring Measurements - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned	$ 3,457	$ 2,296
Collateral-dependent impaired loans, net of ALLL	9,257	6,339
Total assets measured at fair value on a non-recurring basis	12,714	8,635
Level 1
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned	0	0
Collateral-dependent impaired loans, net of ALLL	0	0
Total assets measured at fair value on a non-recurring basis	0	0
Level 2
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned	0	0
Collateral-dependent impaired loans, net of ALLL	0	0
Total assets measured at fair value on a non-recurring basis	0	0
Level 3
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned	3,457	2,296
Collateral-dependent impaired loans, net of ALLL	9,257	6,339
Total assets measured at fair value on a non-recurring basis	$ 12,714	$ 8,635

Quantitative Information about

Quantitative Information about Level 3 Fair Value Measurements (Details) - Non-Recurring Measurements $ in Thousands		Sep. 30, 2018USD ($)Input	Dec. 31, 2017USD ($)Input
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned | $		$ 3,457	$ 2,296
Collateral-dependent impaired loans, net of ALLL | $		9,257	6,339
Level 3
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned | $		3,457	2,296
Collateral-dependent impaired loans, net of ALLL | $		9,257	6,339
Level 3 | Sales Comparison Approach
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned | $		3,457	2,296
Collateral-dependent impaired loans, net of ALLL | $		4,197	2,541
Level 3 | Cost Approach
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ALLL | $		13	238
Level 3 | Combined Approach
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ALLL | $		$ 5,047	$ 3,560
Level 3 | Minimum Range | Sales Comparison Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned	[1]	0.070	0
Collateral-dependent impaired loans, net of ALLL	[1]	0.080	0.080
Level 3 | Minimum Range | Cost Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ALLL	[1]	0.200	0.100
Level 3 | Minimum Range | Combined Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ALLL	[1]	0.100	0.100
Level 3 | Maximum Range | Sales Comparison Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned	[1]	0.150	0.100
Collateral-dependent impaired loans, net of ALLL	[1]	0.200	0.100
Level 3 | Maximum Range | Cost Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ALLL	[1]	0.200	0.200
Level 3 | Maximum Range | Combined Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ALLL	[1]	0.100	0.100
Level 3 | Weighted Average Range | Sales Comparison Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Other real estate owned	[1]	0.075	0.060
Collateral-dependent impaired loans, net of ALLL	[1]	0.104	0.094
Level 3 | Weighted Average Range | Cost Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ALLL	[1]	0.200	0.106
Level 3 | Weighted Average Range | Combined Approach | Selling costs
Quantitative Information About Level 3 Fair Value Measurements
Collateral-dependent impaired loans, net of ALLL	[1]	0.100	0.100
[1]	The range for selling cost inputs represents reductions to the fair value of the assets.

Carrying Amount and Estimated F

Carrying Amount and Estimated Fair Value of Financial Instruments Not Carried at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Carrying Amount
Financial assets
Cash and cash equivalents	$ 307,104	$ 200,004
Debt securities, held-to-maturity	590,915	648,313
Loans receivable, net of ALLL	7,990,710	6,448,256
Total financial assets	8,888,729	7,296,573
Financial liabilities
Term deposits	1,083,882	977,302
FHLB advances	155,328	353,995
Repurchase agreements and other borrowed funds	418,698	370,797
Subordinated debentures	134,055	126,135
Total financial liabilities	1,791,963	1,828,229
Estimated Fair Value | Level 1
Financial assets
Cash and cash equivalents	307,104	200,004
Debt securities, held-to-maturity	0	0
Loans receivable, net of ALLL	0	0
Total financial assets	307,104	200,004
Financial liabilities
Term deposits	0	0
FHLB advances	0	0
Repurchase agreements and other borrowed funds	0	0
Subordinated debentures	0	0
Total financial liabilities	0	0
Estimated Fair Value | Level 2
Financial assets
Cash and cash equivalents	0	0
Debt securities, held-to-maturity	583,557	660,086
Loans receivable, net of ALLL	0	6,219,515
Total financial assets	583,557	6,879,601
Financial liabilities
Term deposits	1,085,035	978,803
FHLB advances	155,281	352,886
Repurchase agreements and other borrowed funds	418,699	370,797
Subordinated debentures	123,363	98,023
Total financial liabilities	1,782,378	1,800,509
Estimated Fair Value | Level 3
Financial assets
Cash and cash equivalents	0	0
Debt securities, held-to-maturity	0	0
Loans receivable, net of ALLL	8,002,596	114,771
Total financial assets	8,002,596	114,771
Financial liabilities
Term deposits	0	0
FHLB advances	0	0
Repurchase agreements and other borrowed funds	0	0
Subordinated debentures	0	0
Total financial liabilities	$ 0	$ 0

Fair Value Measurements (Detail

Fair Value Measurements (Details Textual) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair value measurement transfers from one level to another	$ 0	$ 0
Loans Held For Sale | Gain on sale of loans
Fair Value, Option, Quantitative Disclosures
Changes in fair value, gain (loss)	$ (239,000)	$ 893,000

Mergers and Acquisitions Consid

Mergers and Acquisitions Consideration Transferred, Identifiable Net Assets Acquired and Goodwill Recognized (Details) - USD ($)		Feb. 28, 2018	Jan. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair value of consideration transferred
Effective settlement of a pre-existing relationship						$ 10,054,000	$ 0
Liabilities assumed
Goodwill recognized				$ 0	$ 0	$ 111,724,000	$ 30,758,000
First Security Bank
Fair value of consideration transferred
Fair value of Company shares issued, net of equity issuance costs		$ 181,043,000
Cash consideration for outstanding shares		0
Effective settlement of a pre-existing relationship		0
Total fair value of consideration transferred		181,043,000
Identifiable assets acquired
Cash and cash equivalents		24,397,000
Debt securities		271,865,000
Loans receivable		627,767,000
Core deposit intangible	[1]	31,053,000
Accrued income and other assets		78,325,000
Total identifiable assets acquired		1,033,407,000
Liabilities assumed
Deposits		877,586,000
Borrowings	[2]	36,880,000
Accrued expenses and other liabilities		14,175,000
Total liabilities assumed		928,641,000
Total identifiable net assets		104,766,000
Goodwill recognized		$ 76,277,000
Core Deposit Intangible, Weighted Average Useful Life		10 years
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debentures		$ 7,903,000
Collegiate Peaks Bank
Fair value of consideration transferred
Fair value of Company shares issued, net of equity issuance costs			$ 69,764,000
Cash consideration for outstanding shares			16,265,000
Effective settlement of a pre-existing relationship			10,054,000
Total fair value of consideration transferred			96,083,000
Identifiable assets acquired
Cash and cash equivalents			93,136,000
Debt securities			42,177,000
Loans receivable			354,252,000
Core deposit intangible	[1]		10,275,000
Accrued income and other assets			15,911,000
Total identifiable assets acquired			515,751,000
Liabilities assumed
Deposits			437,171,000
Borrowings			12,509,000
Accrued expenses and other liabilities			5,435,000
Total liabilities assumed			455,115,000
Total identifiable net assets			60,636,000
Goodwill recognized			$ 35,447,000
Core Deposit Intangible, Weighted Average Useful Life			10 years
[1]	The core deposit intangible for each acquisition was determined to have an estimated life of 10 years.
[2]	Borrowings assumed with the FSB acquisition include Tier 2 subordinated debentures of $7,903,000.

Mergers and Acquisitions Pro Fo

Mergers and Acquisitions Pro Forma Summary (Details) - 2018 acquisitions - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pro Forma Information
Net interest income and non-interest income	$ 146,161	$ 135,768	$ 416,611	$ 385,875
Net income	$ 49,336	$ 41,623	$ 127,668	$ 116,174

Mergers and Acquisitions (Detai

Mergers and Acquisitions (Details Textual) - USD ($)	Feb. 28, 2018	Jan. 31, 2018	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition
Effective settlement of a pre-existing relationship			$ 10,054,000	$ 0
First Security Bank
Business Acquisition
Percentage of Outstanding Common Stock Acquired	100.00%
Business Combination, Consideration Transferred	$ 181,043,000
Number of Shares Issued for Aquisition	4,654,091
Cash consideration for outstanding shares	$ 0
Effective settlement of a pre-existing relationship	0
Loans receivable	627,767,000
Loans Receivable Acquired, Gross Principal and Contractual Interest Due	$ 632,370,000
Third-party Acquisition Related Costs			4,670,000
Net interest income and non-interest income			29,901,000
Net income			7,793,000
Collegiate Peaks Bank
Business Acquisition
Percentage of Outstanding Common Stock Acquired		100.00%
Business Combination, Consideration Transferred		$ 96,083,000
Number of Shares Issued for Aquisition		1,778,777
Cash consideration for outstanding shares		$ 16,265,000
Effective settlement of a pre-existing relationship		10,054,000
Loans receivable		354,252,000
Loans Receivable Acquired, Gross Principal and Contractual Interest Due		$ 355,364,000
Third-party Acquisition Related Costs			1,276,000
Net interest income and non-interest income			16,957,000
Net income			$ 3,472,000