OceanFirst Financial (OCFC) 10-Q 8 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 05, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	OCFC
Entity Registrant Name	OCEANFIRST FINANCIAL CORP
Entity Central Index Key	1,004,702
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		48,314,556

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 148,362	$ 109,613
Debt securities available-for-sale, at estimated fair value	100,015	81,581
Debt securities held-to-maturity, net (estimated fair value of $864,173 at September 30, 2018 and $761,660 at December 31, 2017)	883,540	764,062
Equity investments, at estimated fair value	9,519	8,700
Restricted equity investments, at cost	57,143	19,724
Loans receivable, net	5,543,959	3,965,773
Loans held-for-sale	732	241
Interest and dividends receivable	20,822	14,254
Other real estate owned	6,231	8,186
Premises and equipment, net	112,320	101,776
Bank Owned Life Insurance	221,190	134,847
Deferred tax asset	59,052	1,922
Assets held for sale	7,552	4,046
Other assets	36,094	41,895
Core deposit intangible	17,954	8,885
Goodwill	338,104	150,501
Total assets	7,562,589	5,416,006
Liabilities and Stockholders’ Equity
Deposits	5,854,250	4,342,798
Federal Home Loan Bank advances	456,806	288,691
Securities sold under agreements to repurchase with retail customers	61,044	79,668
Other borrowings	99,473	56,519
Advances by borrowers for taxes and insurance	16,654	11,156
Other liabilities	44,518	35,233
Total liabilities	6,532,745	4,814,065
Stockholders’ equity:
Preferred stock, $.01 par value, $1,000 liquidation preference, 5,000,000 shares authorized, no shares issued	0	0
Common stock, $.01 par value, 150,000,000 shares authorized, 48,382,370 shares issued and 48,382,370 and 32,596,893 shares outstanding at September 30, 2018 and December 31, 2017, respectively	483	336
Additional paid-in capital	756,954	354,377
Retained earnings	286,462	271,023
Accumulated other comprehensive loss	(3,943)	(5,349)
Less: Unallocated common stock held by Employee Stock Ownership Plan	(10,112)	(2,479)
Treasury stock, 0 and 969,879 shares at September 30, 2018 and December 31, 2017, respectively	0	(15,967)
Common stock acquired by Deferred Compensation Plan	(87)	(84)
Deferred Compensation Plan Liability	87	84
Total stockholders’ equity	1,029,844	601,941
Total liabilities and stockholders’ equity	$ 7,562,589	$ 5,416,006

Consolidated Statements of Fi_2

Consolidated Statements of Financial Condition (Parenthetical) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Securities held-to-maturity, net estimated fair value	$ 864,173,000	$ 761,660,000
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference	$ 1,000,000	$ 1,000,000
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	48,382,370	48,382,370
Common stock, shares outstanding	48,382,370	32,596,893
Treasury stock, shares	0	969,879

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Loans	$ 64,497	$ 43,329	$ 184,229	$ 127,679
Mortgage-backed securities	4,105	2,738	12,087	8,189
Debt securities, equity investments and other	2,780	1,963	7,980	5,055
Total interest income	71,382	48,030	204,296	140,923
Interest expense:
Deposits	5,799	3,126	15,510	8,821
Borrowed funds	4,079	1,848	10,125	5,389
Total interest expense	9,878	4,974	25,635	14,210
Net interest income	61,504	43,056	178,661	126,713
Provision for loan losses	907	1,165	2,984	3,030
Net interest income after provision for loan losses	60,597	41,891	175,677	123,683
Other income:
Bankcard services revenue	2,425	1,785	6,717	5,202
Net gain on sales of loans	31	17	654	74
Net unrealized loss on equity investments	(70)		(282)	0
Net (loss) income from other real estate operations	(1,582)	432	(2,975)	(196)
Income from Bank Owned Life Insurance	1,337	881	3,813	2,436
Other	836	1	1,880	23
Total other income	8,285	7,359	26,079	20,324
Operating expenses:
Compensation and employee benefits	19,694	14,673	64,189	46,138
Occupancy	4,443	2,556	13,582	7,965
Equipment	2,067	1,605	6,004	5,006
Marketing	1,021	775	2,475	2,245
Federal deposit insurance	927	713	2,857	2,079
Data processing	3,125	2,367	9,968	6,809
Check card processing	799	871	2,904	2,640
Professional fees	1,066	846	3,746	2,901
Other operating expense	3,366	2,667	9,928	8,258
Amortization of core deposit intangible	995	507	2,828	1,544
Branch consolidation expense	1,368	1,455	2,911	6,939
Merger related expenses	662	1,698	25,863	6,300
Total operating expenses	39,533	30,733	147,255	98,824
Income before provision for income taxes	29,349	18,517	54,501	45,183
Provision for income taxes	5,278	5,700	9,301	12,669
Net income	$ 24,071	$ 12,817	$ 45,200	$ 32,514
Basic earnings per share (in dollars per share)	$ 0.50	$ 0.40	$ 0.97	$ 1.01
Diluted earnings per share (in dollars per share)	$ 0.50	$ 0.39	$ 0.95	$ 0.98
Average basic shares outstanding (in usd per share)	47,685	32,184	46,451	32,073
Average diluted shares outstanding (in usd per share)	48,572	33,106	47,403	33,110
Wealth management revenue
Other income:
Other income	$ 573	$ 541	$ 1,721	$ 1,622
Fees and service charges
Other income:
Other income	$ 4,735	$ 3,702	$ 14,551	$ 11,163

Consolidated Statements of Comp

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	$ 24,071	$ 12,817	$ 45,200	$ 32,514
Other comprehensive income:
Unrealized (loss) gain on debt securities (net of tax benefit of $46 and $207 in 2018, and net of tax benefit of $8 and net of tax expense of $50 in 2017, respectively)	(179)	(12)	(772)	72
Accretion of unrealized (gain) loss on debt securities reclassified to held-to-maturity (net of tax expense of $336 and $854 in 2018, and net of tax expense of $122 and $365 in 2017, respectively)	(110)	176	1,836	528
Reclassification adjustment for gains included in net income (net of tax expense of $0 and $53 in 2018)	0	0	195	0
Total comprehensive income	$ 23,782	$ 12,981	$ 46,459	$ 33,114

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - 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]
Unrealized gain (loss) on securities, tax expense (benefit)	$ 46	$ 207	$ 8	$ (50)
Accretion of unrealized loss on securities reclassified to held-to-maturity, tax expense	336	854	122	365
Reclassification adjustment for losses included in net income, tax benefit			$ 53	$ 0

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Employee Stock Ownership Plan	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Common Stock Acquired by Deferred Compensation Plan	Deferred Compensation Plan Liability
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of adopting Accounting Standards Update (ASU) | Accounting Standards Update 2016-09	$ 0			$ (11,129)	$ 11,129
Beginning Balance at Dec. 31, 2016	571,903	$ (2,761)	$ 336	364,433	238,192	$ (5,749)	$ (22,548)	$ (313)	$ 313
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	32,514				32,514
Other comprehensive income, net of tax	600					600
Stock awards	1,678			1,678
Treasury stock allocated to restricted stock plan	0			(1,645)	782		863
Allocation of ESOP stock	692	212		480
Cash dividend	(14,439)				(14,439)
Exercise of stock options	3,192				(2,125)		5,317
Sale (purchase) of stock for the deferred compensation plan								230	(230)
Ending Balance at Sep. 30, 2017	596,140	(2,549)	336	353,817	266,053	(5,149)	(16,368)	(83)	83
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of adopting Accounting Standards Update (ASU) | Accounting Standards Update 2016-01	0			0	(147)	147
Beginning Balance at Dec. 31, 2017	601,941	(2,479)	$ 336	354,377	271,023	(5,349)	(15,967)	(84)	84
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	45,200				45,200
Other comprehensive income, net of tax	1,259					1,259
Stock awards	2,530			2,528
Acquisition of common stock by ESOP	(8,400)	(8,400)
Allocation of ESOP stock	1,249	767		482
Cash dividend	(21,425)				(21,425)
Exercise of stock options (in shares)			4
Exercise of stock options	4,936			12,919	(8,189)		202
Acquisition of Sun Bancorp Inc. (shares)			141
Acquisition of Sun Bancorp Inc.	402,554			386,648			15,765
Sale (purchase) of stock for the deferred compensation plan								(3)	3
Ending Balance at Sep. 30, 2018	$ 1,029,844	$ (10,112)	$ 483	$ 756,954	$ 286,462	$ (3,943)	$ 0	$ (87)	$ 87

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Retained Earnings
Cash dividend per share	$ 0.45	$ 0.45

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 45,200	$ 32,514
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	6,581	4,606
Allocation of ESOP stock	1,249	692
Stock awards	2,530	1,678
Net excess tax benefit on stock compensation	(722)	(1,700)
Amortization of servicing asset	86	67
Net premium amortization in excess of discount accretion on securities	2,988	2,153
Net amortization of deferred costs on borrowings	196	33
Amortization of core deposit intangible	2,828	1,544
Net accretion of purchase accounting adjustments	(12,807)	(6,281)
Net amortization of deferred costs and discounts on loans	493	300
Provision for loan losses	2,984	3,030
Net loss on sale and write-down of other real estate owned	1,949	737
Write down of fixed assets held for sale to net realizable value	3,744	6,350
Net (gain) loss on sale of fixed assets	(26)	13
Net unrealized loss on equity securities	282	0
Net gain on sales of loans	(654)	(74)
Proceeds from sales of mortgage loans held for sale	2,053	3,837
Mortgage loans originated for sale	(2,503)	(2,551)
Increase in value of Bank Owned Life Insurance	(3,813)	(2,436)
Net gain on sale of assets held for sale	(1,166)	0
Increase in interest and dividends receivable	(947)	(1,638)
Decrease in other assets	13,452	4,012
(Decrease) increase in other liabilities	(1,744)	15,810
Total adjustments	17,033	30,182
Net cash provided by operating activities	62,233	62,696
Cash flows from investing activities:
Net decrease (increase) in loans receivable	85,935	(57,646)
Proceeds from sale of under performing loans	8,724	6,022
Purchase of loans receivable	(147,563)	(16,627)
Purchase of debt investment securities available-for-sale	(28,010)	(54,810)
Purchase of debt investment securities held-to-maturity	(4,017)	(111,593)
Purchase of debt mortgage-backed securities held-to-maturity	0	(120,210)
Purchase of equity investments	(138)	0
Proceeds from maturities and calls of debt investment securities available-for-sale	14,001	0
Proceeds from maturities and calls of debt investment securities held-to-maturity	41,246	13,020
Proceeds from Bank Owned Life Insurance	2,708	310
Proceeds from the redemption of restricted equity investments	83,806	19,010
Purchases of restricted equity investments	(104,408)	(18,169)
Proceeds from sales of other real estate owned	646	2,777
Proceeds from sales of assets held for sale	7,488	0
Purchases of premises and equipment	(10,424)	(9,031)
Cash consideration paid for acquisition, net of cash received	(3,743)	0
Net cash provided by (used in) investing activities	37,968	(273,634)
Cash flows from financing activities:
(Decrease) increase in deposits	(103,522)	163,182
Increase in short-term borrowings	122,376	5,391
Proceeds from Federal Home Loan Bank advances	0	10,000
Repayments of Federal Home Loan Bank advances	(56,607)	(1,438)
Repayments of other borrowings	(342)	0
Increase in advances by borrowers for taxes and insurance	5,498	341
Exercise of stock options	4,936	3,192
Payment of employee taxes withheld from stock awards	(3,235)	(1,406)
Acquisition of common stock by ESOP	(8,400)	0
Dividends paid	(21,425)	(14,439)
Net cash (used in) provided by financing activities	(60,721)	164,823
Net increase (decrease) in cash and due from banks and restricted cash	39,480	(46,115)
Supplemental Disclosure of Cash Flow Information:
Cash and due from banks and restricted cash at beginning of period	109,613
Restricted cash at beginning of period	0	0
Cash and due from banks and restricted cash at beginning of period	109,613	301,373
Cash and due from banks and restricted cash at end of period	149,093	255,258
Restricted cash at end of period	731	0
Cash and due from banks and restricted cash at end of period	148,362	255,258
Cash paid during the period for:
Interest	26,637	14,333
Income taxes	143	8
Non-cash activities:
Accretion of unrealized loss on securities reclassified to held-to-maturity	2,690	865
Net loan charge-offs	1,884	1,629
Transfer of premises and equipment to assets held-for-sale	11,092	5,078
Transfer of loans receivable to other real estate owned	640	3,389
Non-cash assets acquired:
Securities	254,522	0
Restricted equity investments	16,967	0
Loans	1,517,172	0
Premises and equipment	19,892	0
Accrued interest receivable	5,621	0
Bank Owned Life Insurance	85,238	0
Deferred tax asset	57,712	0
Other assets	5,246	0
Goodwill and other intangible assets, net	199,500	0
Total non-cash assets acquired	2,161,870	0
Liabilities assumed:
Deposits	1,616,073	0
Borrowings	127,747	0
Other liabilities	11,752	0
Total liabilities assumed	1,755,572	0
Mortgage-backed Securities
Cash flows from investing activities:
Principal repayments on debt mortgage-backed securities held-to-maturity	$ 91,717	$ 73,313

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements include the accounts of OceanFirst Financial Corp. (the “Company”) and its wholly-owned subsidiaries, OceanFirst Bank N.A. (the “Bank”) and OceanFirst Risk Management, Inc., and the Bank’s wholly-owned subsidiaries, OceanFirst REIT Holdings, Inc., and its wholly-owned subsidiary OceanFirst Management Corp., and its wholly-owned subsidiary OceanFirst Realty Corp., OceanFirst Services, LLC and its wholly-owned subsidiary OFB Reinsurance, Ltd., 975 Holdings, LLC, Hooper Holdings, LLC., TRREO Holdings LLC, Casaba Real Estate Holdings Corporation, Cohensey Bridge, L.L.C., and Prosperis Financial, LLC. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain amounts previously reported have been reclassified to conform to the current year’s presentation. The interim consolidated financial statements reflect all normal and recurring adjustments which are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. The results of operations for the three and nine months ended September 30, 2018 are not necessarily indicative of the results of operations that may be expected for all of 2018 . In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the statements of financial condition and the results of operations for the period. Actual results could differ from these estimates. Certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 .

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Business Combinations	Business Combinations On January 31, 2018, the Company completed its acquisition of Sun Bancorp, Inc. (“Sun”), which after purchase accounting adjustments added $2.0 billion to assets, $1.5 billion to loans, and $1.6 billion to deposits. Total consideration paid for Sun was $474.9 million , including cash consideration of $72.4 million . Sun was merged with and into the Company on the date of acquisition. The acquisition was accounted for under the acquisition method of accounting. Under this method of accounting, the purchase price has been allocated to the respective assets acquired and liabilities assumed based upon their estimated fair values, net of tax. The excess of consideration paid over the estimated fair value of the net assets acquired has been recorded as goodwill. The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of the acquisition for Sun, net of total consideration paid (in thousands): At January 31, 2018 Estimated Total Purchase Price: $ 474,930 Assets acquired: Cash and cash equivalents $ 68,632 Securities 254,522 Loans 1,517,172 Accrued interest receivable 5,621 Bank Owned Life Insurance 85,238 Deferred tax asset 57,712 Other assets 42,105 Core deposit intangible 11,897 Total assets acquired 2,042,899 Liabilities assumed: Deposits (1,616,073 ) Borrowings (127,747 ) Other liabilities (11,752 ) Total liabilities assumed (1,755,572 ) Net assets acquired $ 287,327 Goodwill recorded in the merger $ 187,603 The calculation of goodwill is subject to change for up to one year after the date of acquisition as additional information relative to the closing date estimates and uncertainties become available. As the Company finalizes its review of the acquired assets and liabilities, certain adjustments to the recorded carrying values may be required. Supplemental Pro Forma Financial Information The following table presents the unaudited condensed pro forma financial information assuming the Sun acquisition had been completed as of January 1, 2018 for the nine months ended September 30, 2018 and as of January 1, 2017 for the nine months ended September 30, 2017 . The table below has been prepared for comparative purposes only and is not necessarily indicative of the actual results that would have been attained had the acquisition occurred as of the beginning of the periods presented, nor is it indicative of future results. Furthermore, the unaudited pro forma information does not reflect management’s estimate of any revenue-enhancing opportunities nor anticipated cost savings or the impact of conforming certain accounting policies of the acquired company to the Company’s policies that may have occurred as a result of the integration and consolidation of Sun’s operations. The pro forma information shown reflects adjustments related to certain purchase accounting fair value adjustments; amortization of core deposit and other intangibles; and related income tax effects. (in thousands) Pro forma Nine Months Ended September 30, 2018 Pro forma Nine Months Ended September 30, 2017 Net interest income $ 184,887 $ 181,572 Provision for loan losses 2,984 2,199 Non-interest income 26,894 29,590 Non-interest expense 164,538 146,154 Net income $ 35,575 $ 45,027 Fully diluted earnings per share $ 0.74 $ 0.93 Fair Value Measurement of Assets Assumed and Liabilities Assumed The methods used to determine the fair value of the assets acquired and liabilities assumed in the Sun acquisition were as follows. Refer to Note 8, Fair Value Measurements, for a discussion of the fair value hierarchy. Securities The estimated fair values of the securities were calculated utilizing Level 2 inputs. The securities acquired are bought and sold in active markets. Prices for these instruments were obtained through security industry sources that actively participate in the buying and selling of securities. Loans The acquired loan portfolio was valued utilizing Level 3 inputs and included the use of present value techniques employing cash flow estimates and incorporated assumptions that marketplace participants would use in estimating fair values. In instances where reliable market information was not available, the Company used its own assumptions in an effort to determine reasonable fair value. Specifically, the Company utilized three separate fair value analyses which a market participant would employ in estimating the total fair value adjustment. The three separate fair valuation methodologies used were: 1) interest rate loan fair value analysis; 2) general credit fair value adjustment; and 3) specific credit fair value adjustment. To prepare the interest rate fair value analysis, loans were grouped by characteristics such as loan type, term, collateral and rate. Market rates for similar loans were obtained from various external data sources and reviewed by Company management for reasonableness. The average of these rates was used as the fair value interest rate a market participant would utilize. A present value approach was utilized to calculate the interest rate fair value adjustment. The general credit fair value adjustment was calculated using a two part general credit fair value analysis: 1) expected lifetime losses and 2) estimated fair value adjustment for qualitative factors. The expected lifetime losses were calculated using an average of historical losses of the acquired bank. The adjustment related to qualitative factors was impacted by general economic conditions and the risk related to lack of experience with the originator’s underwriting process. To calculate the specific credit fair value adjustment, the Company reviewed the acquired loan portfolio for loans meeting the definition of an impaired loan with deteriorated credit quality. Loans meeting these criteria were reviewed by comparing the contractual cash flows to expected collectible cash flows. The aggregate expected cash flows less the acquisition date fair value resulted in an accretable yield amount which will be recognized over the life of the loans on a level yield basis as an adjustment to yield. Premises and Equipment Fair values are based upon appraisals from independent third parties. In addition to owned properties, Sun operated twenty-one properties subject to lease agreements. Deposits and Core Deposit Premium Core deposit premium represents the value assigned to non-interest-bearing demand deposits, interest-bearing checking, money market and saving accounts acquired as part of the acquisition. The core deposit premium value represents the future economic benefit, including the present value of future tax benefits, of the potential cost saving from acquiring the core deposits as part of an acquisition compared to the cost of alternative funding sources and is valued utilizing Level 2 inputs. The core deposit premium totaled $11.9 million for the acquisition of Sun, and is being amortized over its estimated useful life of approximately 10 years using an accelerated method. Time deposits are not considered to be core deposits as they are assumed to have a low expected average life upon acquisition. The fair value of time deposits represents the present value of the expected contractual payments discounted by market rates for similar time deposits and is valued utilizing Level 2 inputs. Borrowings Fair value estimates are based on discounting contractual cash flows using rates which approximate the rates offered for borrowings of similar remaining maturities.

Earnings per Share

Earnings per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share The following reconciles shares outstanding for basic and diluted earnings per share for the three and nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended Nine Months Ended 2018 2017 2018 2017 Weighted average shares outstanding 48,337 32,545 46,913 32,456 Less: Unallocated ESOP shares (546 ) (306 ) (401 ) (315 ) Unallocated incentive award shares and shares held by deferred compensation plan (106 ) (55 ) (61 ) (68 ) Average basic shares outstanding 47,685 32,184 46,451 32,073 Add: Effect of dilutive securities: Incentive awards and shares held by deferred compensation plan 887 922 952 1,037 Average diluted shares outstanding 48,572 33,106 47,403 33,110 For the three months ended September 30, 2018 and 2017 , antidilutive stock options of 463,000 and 476,000 , respectively, were excluded from earnings per share calculations. For the nine months ended September 30, 2018 and 2017 , antidilutive stock options of 464,000 and 244,000 , respectively, were excluded from earnings per share calculations.

Securities

Securities	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The amortized cost and estimated fair value of debt securities available-for-sale and held-to-maturity at September 30, 2018 , and December 31, 2017 , are as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value At September 30, 2018 Debt securities available-for-sale: Investment securities - U.S. agency obligations $ 100,450 $ — $ (1,577 ) $ 98,873 Mortgage-backed securities - FNMA 1,153 — (11 ) 1,142 Total debt securities available-for-sale $ 101,603 $ — $ (1,588 ) $ 100,015 Debt securities held-to-maturity: Investment securities: U.S. agency obligations $ 14,974 $ — $ (192 ) $ 14,782 State and municipal obligations 134,988 — (2,885 ) 132,103 Corporate debt securities 64,819 921 (3,035 ) 62,705 Total investment securities 214,781 921 (6,112 ) 209,590 Mortgage-backed securities: FHLMC 249,884 45 (8,126 ) 241,803 FNMA 289,210 755 (9,382 ) 280,583 GNMA 130,847 176 (2,858 ) 128,165 SBA 4,126 — (94 ) 4,032 Total mortgage-backed securities 674,067 976 (20,460 ) 654,583 Total debt securities held-to-maturity $ 888,848 $ 1,897 $ (26,572 ) $ 864,173 Total debt securities $ 990,451 $ 1,897 $ (28,160 ) $ 964,188 At December 31, 2017 Debt securities available-for-sale: Investment securities - U.S. agency obligations $ 82,378 $ — $ (797 ) $ 81,581 Debt securities held-to-maturity: Investment securities: U.S. agency obligations $ 14,968 $ — $ (65 ) $ 14,903 State and municipal obligations 149,958 219 (1,475 ) 148,702 Corporate debt securities 76,024 312 (3,962 ) 72,374 Total investment securities 240,950 531 (5,502 ) 235,979 Mortgage-backed securities: FHLMC 186,921 151 (2,937 ) 184,135 FNMA 263,103 1,193 (3,000 ) 261,296 GNMA 75,243 64 (928 ) 74,379 SBA 5,843 28 — 5,871 Total mortgage-backed securities 531,110 1,436 (6,865 ) 525,681 Total debt securities held-to-maturity $ 772,060 $ 1,967 $ (12,367 ) $ 761,660 Total debt securities $ 854,438 $ 1,967 $ (13,164 ) $ 843,241 During the third quarter 2013, the Bank transferred $536.0 million of previously designated available-for-sale securities to a held-to-maturity designation at estimated fair value. The securities transferred had an unrealized net loss of $13.3 million at the time of transfer which continues to be reflected in accumulated other comprehensive loss on the consolidated balance sheet, net of subsequent amortization, which is being recognized over the life of the securities. The carrying value of the debt securities held-to-maturity at September 30, 2018 , and December 31, 2017 , is as follows (in thousands): September 30, 2018 December 31, 2017 Amortized cost $ 888,848 $ 772,060 Net loss on date of transfer from available-for-sale (13,347 ) (13,347 ) Accretion of net unrealized loss on securities reclassified as held-to-maturity 8,039 5,349 Carrying value $ 883,540 $ 764,062 Realized gains were $0 and $248,000 for the three and nine months ended September 30, 2018 , respectively, and there were no realized gains or losses on the sale of securities for the three and nine months ended September 30, 2017 . The amortized cost and estimated fair value of investment securities at September 30, 2018 by contractual maturity are shown below (in thousands). Actual maturities may differ from contractual maturities in instances where issuers have the right to call or prepay obligations with or without call or prepayment penalties. At September 30, 2018 , corporate debt securities with an amortized cost of $53.8 million and estimated fair value of $51.8 million were callable prior to the maturity date. September 30, 2018 Amortized Cost Estimated Fair Value Less than one year $ 56,753 $ 56,522 Due after one year through five years 156,879 153,904 Due after five years through ten years 90,804 86,373 Due after ten years 10,795 11,664 $ 315,231 $ 308,463 Mortgage-backed securities are excluded from the above table since their effective lives are expected to be shorter than the contractual maturity date due to principal prepayments. The estimated fair value of securities pledged as required security for deposits and for other purposes required by law amounted to $578.5 million and $466.4 million , at September 30, 2018 and December 31, 2017 , respectively, including $76.8 million and $58.0 million at September 30, 2018 and December 31, 2017 , respectively, pledged as collateral for securities sold under agreements to repurchase. The estimated fair value and unrealized losses of debt securities available-for-sale and held-to-maturity at September 30, 2018 and December 31, 2017 , segregated by the duration of the unrealized losses, are as follows (in thousands): At September 30, 2018 Less than 12 months 12 months or longer Total Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Debt securities available-for-sale: Investment securities - U.S. agency obligations $ 57,252 $ (675 ) $ 41,621 $ (902 ) $ 98,873 $ (1,577 ) Mortgage-backed securities - FNMA 1,142 (11 ) — — 1,142 (11 ) Total debt securities available-for-sale 58,394 (686 ) 41,621 (902 ) 100,015 (1,588 ) Debt securities held-to-maturity: Investment securities: U.S. agency obligations 9,835 (129 ) 4,947 (63 ) 14,782 (192 ) State and municipal obligations 52,779 (744 ) 67,500 (2,141 ) 120,279 (2,885 ) Corporate debt securities 4,903 (68 ) 41,583 (2,967 ) 46,486 (3,035 ) Total investment securities 67,517 (941 ) 114,030 (5,171 ) 181,547 (6,112 ) Mortgage-backed securities: FHLMC 125,973 (2,463 ) 112,290 (5,663 ) 238,263 (8,126 ) FNMA 120,922 (3,594 ) 112,293 (5,788 ) 233,215 (9,382 ) GNMA 52,813 (1,042 ) 51,237 (1,816 ) 104,050 (2,858 ) SBA 4,032 (94 ) — — 4,032 (94 ) Total mortgage-backed securities 303,740 (7,193 ) 275,820 (13,267 ) 579,560 (20,460 ) Total debt securities held-to-maturity 371,257 (8,134 ) 389,850 (18,438 ) 761,107 (26,572 ) Total debt securities $ 429,651 $ (8,820 ) $ 431,471 $ (19,340 ) $ 861,122 $ (28,160 ) At December 31, 2017 Less than 12 months 12 months or longer Total Estimated Unrealized Estimated Unrealized Estimated Unrealized Debt securities available-for-sale: Investment securities - U.S. agency obligations $ 69,375 $ (496 ) $ 12,206 $ (301 ) $ 81,581 $ (797 ) Debt securities held-to-maturity: Investment securities: U.S. agency obligations 14,903 (65 ) — — 14,903 (65 ) State and municipal obligations 104,883 (1,153 ) 14,363 (322 ) 119,246 (1,475 ) Corporate debt securities 4,035 (30 ) 56,106 (3,932 ) 60,141 (3,962 ) Total investment securities 123,821 (1,248 ) 70,469 (4,254 ) 194,290 (5,502 ) Mortgage-backed securities: FHLMC 98,138 (781 ) 68,238 (2,156 ) 166,376 (2,937 ) FNMA 132,982 (1,058 ) 65,060 (1,942 ) 198,042 (3,000 ) GNMA 26,105 (223 ) 45,281 (705 ) 71,386 (928 ) Total mortgage-backed securities 257,225 (2,062 ) 178,579 (4,803 ) 435,804 (6,865 ) Total debt securities held-to-maturity 381,046 (3,310 ) 249,048 (9,057 ) 630,094 (12,367 ) Total debt securities $ 450,421 $ (3,806 ) $ 261,254 $ (9,358 ) $ 711,675 $ (13,164 ) At September 30, 2018 , the amortized cost, estimated fair value and credit rating of the individual corporate debt securities in an unrealized loss position for greater than one year are as follows (in thousands): Security Description Amortized Cost Estimated Fair Value Credit Rating Moody’s/ S&P Chase Capital $ 10,000 $ 9,350 Baa2/BBB- Wells Fargo Capital 5,000 4,650 A1/BBB Huntington Capital 5,000 4,525 Baa2/BB+ Keycorp Capital 5,000 4,600 Baa2/BB+ PNC Capital 5,000 4,678 Baa1/BBB- State Street Capital 5,000 4,700 A3/BBB SunTrust Capital 5,000 4,625 Not Rated/BB+ Southern Company 1,516 1,485 Baa2/BBB+ AT&T Inc. 1,510 1,480 Baa2/BBB Celgene 1,524 1,490 Baa2/BBB+ $ 44,550 $ 41,583 At September 30, 2018 , the estimated fair value of each of the above corporate debt securities was below cost. The Company concluded that these corporate debt securities were only temporarily impaired at September 30, 2018 . In concluding that the impairments were only temporary, the Company considered several factors in its analysis. The Company noted that each issuer made all the contractually due payments when required. There were no defaults on principal or interest payments and no interest payments were deferred. Based on management’s analysis of each individual security, the issuers appear to have the ability to meet debt service requirements over the life of the security. Furthermore, the Company does not intend to sell these corporate debt securities and it is more likely than not that the Company will not be required to sell the securities. Historically, the Company has not utilized securities sales as a source of liquidity. The Company’s long range liquidity plans indicate adequate sources of liquidity outside the securities portfolio. The mortgage-backed securities are issued and guaranteed by either the Federal Home Loan Mortgage Corporation (“FHLMC”), the Federal National Mortgage Association (“FNMA”), the Government National Mortgage Association (“GNMA”), or the Small Business Administration (“SBA”), corporations which are chartered by the United States Government and whose debt obligations are typically rated AA+ by one of the internationally-recognized credit rating services. The Company considers the unrealized losses to be the result of changes in interest rates which over time can have both a positive and negative impact on the estimated fair value of the mortgage-backed securities. The Company does not intend to sell these securities and it is more likely than not that the Company will not be required to sell the securities before recovery of their amortized cost. As a result, the Company concluded that these securities were only temporarily impaired at September 30, 2018 .

Loans Receivable, Net

Loans Receivable, Net	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Loans Receivable, Net	Loans Receivable, Net Loans receivable, net at September 30, 2018 and December 31, 2017 consisted of the following (in thousands): September 30, 2018 December 31, 2017 Commercial: Commercial and industrial $ 342,555 $ 187,645 Commercial real estate – owner occupied 734,720 569,497 Commercial real estate – investor 2,011,897 1,186,302 Total commercial 3,089,172 1,943,444 Consumer: Residential real estate 2,019,918 1,748,590 Home equity loans and lines 358,728 281,143 Other consumer 74,555 1,225 Total consumer 2,453,201 2,030,958 5,542,373 3,974,402 Purchased credit impaired (“PCI”) loans 9,700 1,712 Total Loans 5,552,073 3,976,114 Deferred origination costs, net 8,707 5,380 Allowance for loan losses (16,821 ) (15,721 ) Total loans, net $ 5,543,959 $ 3,965,773 At September 30, 2018 and December 31, 2017 , loans in the amount of $19.2 million and $20.9 million , respectively, were three or more months delinquent or in the process of foreclosure and the Company was not accruing interest income on these loans. At September 30, 2018 , there were no loans that were ninety days or greater past due and still accruing interest. Non-accrual loans include both smaller balance homogenous loans that are collectively evaluated for impairment and individually classified impaired loans. The recorded investment in mortgage and consumer loans collateralized by residential real estate, which are in the process of foreclosure, amounted to $2.1 million at September 30, 2018 . The amount of foreclosed residential real estate property held by the Company was $447,000 at September 30, 2018 . The Company defines an impaired loan as non-accrual commercial real estate, multi-family, land, construction and commercial loans in excess of $250,000 . Impaired loans also include all loans modified as troubled debt restructurings. At September 30, 2018 , the impaired loan portfolio totaled $33.1 million for which there was no specific allocation in the allowance for loan losses. At December 31, 2017 , the impaired loan portfolio totaled $47.0 million for which there was no specific allocation in the allowance for loan losses. The average balance of impaired loans for the three and nine months ended September 30, 2018 was $32.9 million and $39.2 million , respectively, and for the three and nine months ended September 30, 2017 was $43.1 million and $38.0 million , respectively. An analysis of the allowance for loan losses for the three and nine months ended September 30, 2018 and 2017 is as follows (in thousands): Three Months Ended Nine Months Ended 2018 2017 2018 2017 Balance at beginning of period $ 16,691 $ 16,557 $ 15,721 $ 15,183 Provision charged to operations 907 1,165 2,984 3,030 Charge-offs (891 ) (1,357 ) (2,708 ) (2,861 ) Recoveries 114 219 824 1,232 Balance at end of period $ 16,821 $ 16,584 $ 16,821 $ 16,584 The following table presents an analysis of the allowance for loan losses for the three and nine months ended September 30, 2018 and 2017 and the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2018 and December 31, 2017 , excluding PCI loans (in thousands): Commercial and Industrial Commercial Real Estate – Owner Occupied Commercial Real Estate – Investor Residential Real Estate Consumer Unallocated Total For the three months ended September 30, 2018 Allowance for loan losses: Balance at beginning of period $ 2,080 $ 2,340 $ 9,058 $ 2,126 $ 526 $ 561 $ 16,691 Provision (benefit) charged to operations (520 ) 187 661 578 57 (56 ) 907 Charge-offs (146 ) — (138 ) (535 ) (72 ) — (891 ) Recoveries 28 1 9 57 19 — 114 Balance at end of period $ 1,442 $ 2,528 $ 9,590 $ 2,226 $ 530 $ 505 $ 16,821 For the three months ended September 30, 2017 Allowance for loan losses: Balance at beginning of period $ 2,253 $ 3,097 $ 8,367 $ 1,492 $ 930 $ 418 $ 16,557 Provision (benefit) charged to operations (180 ) 119 81 1,465 (122 ) (198 ) 1,165 Charge-offs (6 ) — — (1,284 ) (67 ) — (1,357 ) Recoveries 50 — 24 128 17 — 219 Balance at end of period $ 2,117 $ 3,216 $ 8,472 $ 1,801 $ 758 $ 220 $ 16,584 For the nine months ended September 30, 2018 Allowance for loan losses: Balance at beginning of period $ 1,801 $ 3,175 $ 7,952 $ 1,804 $ 614 $ 375 $ 15,721 Provision (benefit) charged to operations (238 ) (734 ) 2,706 1,079 41 130 2,984 Charge-offs (202 ) (91 ) (1,239 ) (936 ) (240 ) — (2,708 ) Recoveries 81 178 171 279 115 — 824 Balance at end of period $ 1,442 $ 2,528 $ 9,590 $ 2,226 $ 530 $ 505 $ 16,821 For the nine months ended September 30, 2017 Allowance for loan losses: Balance at beginning of period $ 2,037 $ 2,999 $ 6,361 $ 2,245 $ 1,110 $ 431 $ 15,183 Provision (benefit) charged to operations (221 ) 167 2,164 1,477 (346 ) (211 ) 3,030 Charge-offs (94 ) (73 ) (84 ) (2,485 ) (125 ) — (2,861 ) Recoveries 395 123 31 564 119 — 1,232 Balance at end of period $ 2,117 $ 3,216 $ 8,472 $ 1,801 $ 758 $ 220 $ 16,584 September 30, 2018 Allowance for loan losses: Ending allowance balance attributed to loans: Individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ — Collectively evaluated for impairment 1,442 2,528 9,590 2,226 530 505 16,821 Total ending allowance balance $ 1,442 $ 2,528 $ 9,590 $ 2,226 $ 530 $ 505 $ 16,821 Loans: Loans individually evaluated for impairment $ 1,738 $ 5,446 $ 12,760 $ 10,454 $ 2,690 $ — $ 33,088 Loans collectively evaluated for impairment 340,817 729,274 1,999,137 2,009,464 430,593 — 5,509,285 Total ending loan balance $ 342,555 $ 734,720 $ 2,011,897 $ 2,019,918 $ 433,283 $ — $ 5,542,373 Commercial and Industrial Commercial Real Estate – Owner Occupied Commercial Real Estate – Investor Residential Real Estate Consumer Unallocated Total December 31, 2017 Allowance for loan losses: Ending allowance balance attributed to loans: Individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ — Collectively evaluated for impairment 1,801 3,175 7,952 1,804 614 375 15,721 Total ending allowance balance $ 1,801 $ 3,175 $ 7,952 $ 1,804 $ 614 $ 375 $ 15,721 Loans: Loans individually evaluated for impairment $ 864 $ 15,132 $ 17,923 $ 10,605 $ 2,464 $ — $ 46,988 Loans collectively evaluated for impairment 186,781 554,365 1,168,379 1,737,985 279,904 — 3,927,414 Total ending loan balance $ 187,645 $ 569,497 $ 1,186,302 $ 1,748,590 $ 282,368 $ — $ 3,974,402 A summary of impaired loans at September 30, 2018 , and December 31, 2017 , is as follows, excluding PCI loans (in thousands): September 30, 2018 December 31, 2017 Impaired loans with no allocated allowance for loan losses $ 33,088 $ 46,988 Impaired loans with allocated allowance for loan losses — — $ 33,088 $ 46,988 Amount of the allowance for loan losses allocated $ — $ — At September 30, 2018 , impaired loans included troubled debt restructured (“TDR”) loans of $27.8 million , of which $24.2 million were performing in accordance with their restructured terms for a minimum of six months and were accruing interest. At December 31, 2017 , impaired loans included TDR loans of $42.1 million , of which $33.3 million were performing in accordance with their restructured terms for a minimum of six months and were accruing interest. The summary of loans individually evaluated for impairment by loan portfolio segment as of September 30, 2018 , and December 31, 2017 and for the three and nine months ended September 30, 2018 and 2017 , is as follows, excluding PCI loans (in thousands): Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated As of September 30, 2018 With no related allowance recorded: Commercial and industrial $ 1,824 $ 1,738 $ — Commercial real estate – owner occupied 5,459 5,446 — Commercial real estate – investor 15,290 12,760 — Residential real estate 10,828 10,454 — Consumer 3,009 2,690 — $ 36,410 $ 33,088 $ — With an allowance recorded: Commercial and industrial $ — $ — $ — Commercial real estate – owner occupied — — — Commercial real estate – investor — — — Residential real estate — — — Consumer — — — $ — $ — $ — As of December 31, 2017 With no related allowance recorded: Commercial and industrial $ 895 $ 864 $ — Commercial real estate – owner occupied 15,832 15,132 — Commercial real estate – investor 19,457 17,923 — Residential real estate 10,951 10,605 — Consumer 2,941 2,464 — $ 50,076 $ 46,988 $ — With an allowance recorded: Commercial and industrial $ — $ — $ — Commercial real estate – owner occupied — — — Commercial real estate – investor — — — Residential real estate — — — Consumer — — — $ — $ — $ — Three Months Ended September 30, 2018 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ 982 $ 69 $ 908 $ 26 Commercial real estate – owner occupied 5,484 75 11,217 335 Commercial real estate – investor 12,191 102 11,147 240 Residential real estate 10,741 119 12,791 128 Consumer 2,782 33 2,495 36 $ 32,180 $ 398 $ 38,558 $ 765 With an allowance recorded: Commercial and industrial $ 736 $ — $ — $ — Commercial real estate – owner occupied — — — — Commercial real estate – investor — — 4,551 13 Residential real estate — — — — Consumer — — — — $ 736 $ — $ 4,551 $ 13 Nine Months Ended September 30, 2018 2017 Average Interest Average Interest With no related allowance recorded: Commercial and industrial $ 906 $ 85 $ 588 $ 50 Commercial real estate – owner occupied 8,978 226 11,080 520 Commercial real estate – investor 14,259 304 6,550 487 Residential real estate 10,873 356 11,009 401 Consumer 2,629 116 2,368 106 $ 37,645 $ 1,087 $ 31,595 $ 1,564 With an allowance recorded: Commercial and industrial $ 736 $ — $ — $ — Commercial real estate – owner occupied — — — — Commercial real estate – investor 838 — 4,233 81 Residential real estate — — 1,981 62 Consumer — — 148 6 $ 1,574 $ — $ 6,362 $ 149 The following table presents the recorded investment in non-accrual loans by loan portfolio segment as of September 30, 2018 and December 31, 2017 , excluding PCI loans (in thousands): September 30, 2018 December 31, 2017 Commercial and industrial $ 1,727 $ 503 Commercial real estate – owner occupied 511 5,962 Commercial real estate – investor 8,082 8,281 Residential real estate 6,390 4,190 Consumer 2,529 1,929 $ 19,239 $ 20,865 The following table presents the aging of the recorded investment in past due loans as of September 30, 2018 and December 31, 2017 by loan portfolio segment, excluding PCI loans (in thousands): 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Past Due Total Past Due Loans Not Past Due Total September 30, 2018 Commercial and industrial $ 55 $ 37 $ 28 $ 120 $ 342,435 $ 342,555 Commercial real estate – owner occupied 3,433 876 197 4,506 730,214 734,720 Commercial real estate – investor 2,788 666 7,938 11,392 2,000,505 2,011,897 Residential real estate 11,674 6,462 3,567 21,703 1,998,215 2,019,918 Consumer 1,720 776 2,120 4,616 428,667 433,283 $ 19,670 $ 8,817 $ 13,850 $ 42,337 $ 5,500,036 $ 5,542,373 December 31, 2017 Commercial and industrial $ 2,694 $ 36 $ 503 $ 3,233 $ 184,412 $ 187,645 Commercial real estate – owner occupied 222 — 5,402 5,624 563,873 569,497 Commercial real estate – investor 135 1,426 4,507 6,068 1,180,234 1,186,302 Residential real estate 13,197 2,351 3,372 18,920 1,729,670 1,748,590 Consumer 1,067 310 1,687 3,064 279,304 282,368 $ 17,315 $ 4,123 $ 15,471 $ 36,909 $ 3,937,493 $ 3,974,402 The Company categorizes all commercial and commercial real estate loans, except for small business loans, into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation and current economic trends, among other factors. The Company uses the following definitions for risk ratings: Pass : Loans classified as Pass are well protected by the paying capacity and net worth of the borrower. Special Mention : Loans classified as Special Mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the Bank’s credit position at some future date. Substandard : Loans classified as Substandard are inadequately protected by the current net worth and paying capacity of the borrower or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Doubtful : Loans classified as Doubtful have all the weaknesses inherent in those classified as Substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. As of September 30, 2018 and December 31, 2017 , and based on the most recent analysis performed, the risk category of loans by loan portfolio segment follows, excluding PCI loans (in thousands) is as follows: Pass Special Mention Substandard Doubtful Total September 30, 2018 Commercial and industrial $ 330,996 $ 423 $ 11,136 $ — $ 342,555 Commercial real estate – owner occupied 709,902 2,202 22,616 — 734,720 Commercial real estate – investor 1,955,483 23,180 33,234 — 2,011,897 $ 2,996,381 $ 25,805 $ 66,986 $ — $ 3,089,172 December 31, 2017 Commercial and industrial $ 181,438 $ 3,153 $ 3,054 $ — $ 187,645 Commercial real estate – owner occupied 546,569 4,337 18,591 — 569,497 Commercial real estate – investor 1,146,630 14,644 25,028 — 1,186,302 $ 1,874,637 $ 22,134 $ 46,673 $ — $ 1,943,444 For residential and consumer loan classes, the Company evaluates credit quality based on the aging status of the loan, which was previously presented, and by payment activity. The following table presents the recorded investment in residential and consumer loans based on payment activity as of September 30, 2018 and December 31, 2017 , excluding PCI loans (in thousands): Residential Consumer September 30, 2018 Performing $ 2,013,528 $ 430,754 Non-performing 6,390 2,529 $ 2,019,918 $ 433,283 December 31, 2017 Performing $ 1,744,400 $ 280,439 Non-performing 4,190 1,929 $ 1,748,590 $ 282,368 The Company classifies certain loans as troubled debt restructurings when credit terms to a borrower in financial difficulty are modified. The modifications may include a reduction in rate, an extension in term, the capitalization of past due amounts and/or the restructuring of scheduled principal payments. One-to-four family and consumer loans where the borrower’s debt is discharged in a bankruptcy filing are also considered troubled debt restructurings. For these loans, the Bank retains its security interest in the real estate collateral. Included in the non-accrual loan total at September 30, 2018 , and December 31, 2017 , were $3.6 million and $8.8 million , respectively, of troubled debt restructurings. At September 30, 2018 and December 31, 2017 , the Company had no specific reserves allocated to loans that are classified as troubled debt restructurings. Non-accrual loans which become troubled debt restructurings are generally returned to accrual status after six months of performance. In addition to the troubled debt restructurings included in non-accrual loans, the Company also has loans classified as accruing troubled debt restructurings at September 30, 2018 , and December 31, 2017 , which totaled $24.2 million and $33.3 million , respectively. Troubled debt restructurings are considered in the allowance for loan losses similar to other impaired loans. The following table presents information about troubled debt restructurings which occurred during the three and nine months ended September 30, 2018 and 2017 , and troubled debt restructurings modified within the previous year and which defaulted during the three and nine months ended September 30, 2018 and 2017 (dollars in thousands): Number of Loans Pre-modification Recorded Investment Post-modification Recorded Investment Three months ended September 30, 2018 Troubled Debt Restructurings: Commercial real estate – owner occupied 1 49 50 Commercial real estate – investor 1 171 210 Number of Loans Recorded Investment Troubled Debt Restructurings Which Subsequently Defaulted: Commercial real estate – investor 1 $ 2,820 Consumer 1 30 Number of Loans Pre-modification Post-modification Nine months ended September 30, 2018 Troubled Debt Restructurings: Commercial and industrial 2 $ 496 $ 502 Commercial real estate – owner occupied 1 49 50 Commercial real estate – investor 3 1,395 1,435 Residential real estate 2 257 270 Number of Loans Recorded Investment Troubled Debt Restructurings Which Subsequently Defaulted: Commercial real estate – investor 1 $ 2,820 Consumer 1 30 Number of Loans Pre-modification Recorded Investment Post-modification Recorded Investment Three Months Ended September 30, 2017 Troubled Debt Restructurings: Commercial real estate - owner occupied 1 $ 700 $ 700 Commercial real estate – investor 1 700 700 Residential real estate 2 328 357 Number of Loans Recorded Investment Troubled Debt Restructurings Which Subsequently Defaulted: None None Number of Loans Pre-modification Recorded Investment Post-modification Recorded Investment Nine months ended September 30, 2017 Troubled Debt Restructurings: Commercial and industrial 1 $ 665 $ 665 Commercial real estate - owner occupied 4 3,309 3,309 Commercial real estate – investor 4 6,362 6,484 Residential real estate 6 1,354 1,356 Number of Loans Recorded Investment Troubled Debt Restructurings Which Subsequently Defaulted: None None As part of the Sun acquisition, PCI loans were acquired at a discount primarily due to deteriorated credit quality. PCI loans are accounted for at fair value, based upon the present value of expected future cash flows, with no related allowance for loan losses. The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected and the estimated fair value of the PCI loans acquired from Sun at January 31, 2018 (in thousands): Sun January 31, 2018 Contractually required principal and interest $ 22,556 Contractual cash flows not expected to be collected (non-accretable discount) (6,115 ) Expected cash flows to be collected at acquisition 16,441 Interest component of expected cash flows (accretable yield) (3,535 ) Fair value of acquired loans $ 12,906 The following table summarizes the changes in accretable yield for PCI loans during the three and nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Beginning balance $ 2,300 $ 161 $ 1,465 $ 749 Acquisition — 2,646 — — Accretion (368 ) (1,459 ) (328 ) (642 ) Reclassification from non-accretable difference 470 1,054 13 1,043 Ending balance $ 2,402 $ 2,402 $ 1,150 $ 1,150

Deposits

Deposits	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
Deposits	Deposits The major types of deposits at September 30, 2018 and December 31, 2017 were as follows (in thousands): Type of Account September 30, 2018 December 31, 2017 Non-interest-bearing $ 1,196,875 $ 756,513 Interest-bearing checking 2,332,215 1,954,358 Money market deposit 584,250 363,656 Savings 887,799 661,167 Time deposits 853,111 607,104 Total deposits $ 5,854,250 $ 4,342,798 Included in time deposits at September 30, 2018 and December 31, 2017 , is $119.4 million and $84.9 million , respectively, in deposits of $250,000 and over.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2018
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU” or “Update”) 2014-09, “Revenue from Contracts with Customers (Topic 606)” and subsequent related Updates modifies the guidance used to recognize revenue from contracts with customers for transfers of goods or services and transfers of nonfinancial assets, unless those contracts are within the scope of other guidance. The Updates also require new qualitative and quantitative disclosures, including disaggregation of revenues and descriptions of performance obligations. The amendments in this update were effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. On January 1, 2018, the Company adopted ASU 2014-09 and all subsequent amendments to the ASU (collectively, “ASC 606”). The majority of the Company’s revenues are not subject to ASC 606, including revenue generated from financial instruments, such as interest and dividend income, including loans and securities, as these activities are subject to other U.S. Generally Accepted Accounting Principles (“GAAP”). Revenue generating activities that are within the scope of ASC 606 are presented within non-interest income and are recognized as revenue as the Company satisfies its obligation to the customer. Descriptions of revenue generating activities that are within the scope of ASC 606, which are presented in the Consolidated Statements of Income as components of other income are as follows: • Bankcard services revenue - The Company generates other non-interest income from Bankcard services, which includes interchange revenue and merchant services revenue. The calculation of the revenue collected is based on customer transactions, which do not have a fixed duration. When there is a transaction, the performance obligation is fulfilled. The Company recognizes revenue per underlying transaction and recognizes the revenue when the performance obligation is satisfied at a point in time. • Wealth management revenue - The Company provides customers with sound financial solutions and comprehensive wealth management products. Wealth management accounts earn minimum annual fees and may earn additional fees and service charges. Fees and service charges from wealth management accounts may include numerous fees such as Bill Pay fees, extraordinary service fees, unique asset fees, and transaction fees. The Company will recognize the fee when received because the Company provided the service to its customer at that time, and has no future performance obligation. Therefore, each month the Company will accrue and recognize the monthly portion of the minimum annual fee as a result of providing advisory services. If a customer utilizes additional services such as a wire transfer or bill pay, or any other advisory service outlined in their respective agreements, the Company will recognize revenue at that time, since there are no future performance obligations during the existing contract. • Fees and service charges - The Company has multiple types of deposit accounts that may earn fees and service charges. Fees and service charges from deposit accounts represent general service fees for monthly account maintenance and activity-or-transaction-based fees and consist of transaction-based revenue, time-based revenue (service period), item-based revenue or some other individual attribute-based revenue. Revenue is recognized when the performance obligation is satisfied, which is generally monthly for account maintenance services or when a transaction has been completed (such as a wire transfer). Payment for such performance obligations are typically received at the time the performance obligations are satisfied. The Company adopted the ASU using the modified retrospective method as of January 1, 2018. The adoption of this ASU did not result in a change to the accounting for any of the in-scope revenue streams; as such no cumulative effect adjustment was recorded on the Company’s consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, “Financial Instruments - Overall (Subtopic 825-10) Recognition and Measurement of Financial Assets and Financial Liabilities.” The main objective in developing this new ASU is to enhance the reporting model for financial instruments to provide users of financial statements with more useful information. The update requires equity investments to be measured at fair value with changes in fair value recognized in net income. It simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a quantitative assessment to identify impairment. The amendment eliminates the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. It requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. Financial assets and financial liabilities are to be presented separately by measurement category and the need for a valuation allowance on a deferred tax asset related to available-for-sale securities should be evaluated with other deferred tax assets. The amendments in this update were effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company adopted this ASU in its entirety on January 1, 2018, and has appropriately reflected the changes throughout the Company’s consolidated financial statements. The adoption of this ASU resulted in an impact to retained earnings and other comprehensive income of $147,000 . In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” This ASU requires all lessees to recognize a lease liability and a right-of-use asset, measured at the present value of the future minimum lease payments, at the lease commencement date. Lessor accounting remains largely unchanged under the new guidance. The guidance is effective for fiscal years beginning after December 15, 2018, including interim reporting periods within that reporting period, with early adoption permitted. A modified retrospective approach must be applied for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company is currently assessing the impact that the guidance will have on the Company’s consolidated financial statements. The Company has begun its evaluation of the amended guidance including the potential impact on its consolidated financial statements. To date, the Company has identified its leased real estate as within the scope of the guidance and continues to evaluate the impact of the guidance, including determining whether other contracts exist that are deemed to be in scope. The Company expects total assets and total liabilities will increase by similar amounts. Further, to date, no guidance has been issued by either the Company’s or the Bank’s primary regulator with respect to how the impact of the amended standard is to be treated for regulatory capital purposes. In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments.” This ASU significantly changes how entities will measure credit losses for most financial assets and certain other instruments that aren’t measured at fair value through net income. The standard will replace today’s “incurred loss” approach with an “expected loss” model. The new model, referred to as the current expected credit loss (“CECL”) model, will apply to: (1) financial assets subject to credit losses and measured at amortized cost, and (2) certain off-balance sheet credit exposures. This includes, but is not limited to, loans, leases, held-to-maturity securities, loan commitments, and financial guarantees. The CECL model does not apply to available-for-sale (“AFS”) debt securities. For AFS debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. As a result, entities will recognize improvements to estimated credit losses immediately in earnings rather than as interest income over time, as they do today. The ASU also simplifies the accounting model for purchased credit-impaired debt securities and loans. ASU 2016-13 also expands the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating the allowance for loan and lease losses. In addition, entities will need to disclose the amortized cost balance for each class of financial asset by credit quality indicator, disaggregated by the year of origination. ASU No. 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted for interim and annual reporting periods beginning after December 15, 2018. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (i.e., modified retrospective approach). The Company has begun its evaluation of the amended guidance including the potential impact on its consolidated financial statements. As a result of the required change in approach toward determining estimated credit losses from the current “incurred loss” model to one based on estimated cash flows over a loan’s contractual life, adjusted for prepayments (a “life of loan” model), the Company expects that the new guidance will result in an increase in the allowance for loan losses, particularly for longer duration loan portfolios. The Company also expects that the new guidance may result in an allowance for debt securities. In both cases, the extent of the change is indeterminable at this time as it will be dependent upon portfolio composition and credit quality at the adoption date, as well as economic conditions and forecasts at that time. In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805) - Clarifying the Definition of a Business.” This ASU narrows the definition of a business and clarifies that, to be considered a business, the fair value of the gross assets acquired (or disposed of) may not be substantially all concentrated in a single identifiable asset or group of similar assets. In addition, in order to be considered a business, a set of activities and assets must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs. This ASU was effective for fiscal years beginning after December 15, 2017; early adoption was permitted on a limited basis. The Company adopted this guidance on January 1, 2018 and it did not have a material impact on the Company’s consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350) - Simplifying the Test for Goodwill Impairment.” This ASU intends to simplify the subsequent measurement of goodwill, eliminating Step 2 from the goodwill impairment test. Instead, an entity should perform its annual goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge by which the carrying amount exceeds the reporting unit’s fair value; however the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The ASU also eliminates the requirement for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment. ASU No. 2017-04 is effective for fiscal years beginning after December 15, 2019; early adoption is permitted for annual goodwill impairment tests performed on testing dates after January 1, 2017. The adoption of this update will not have a material impact on the Company’s consolidated financial statements. In March 2017, the FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization on Purchased Callable Debt Securities.” This ASU requires the amortization of premiums to the earliest call date on debt securities with call features that are explicit, noncontingent and callable at fixed prices and on preset dates. This ASU does not impact securities held as a discount, as the discount continues to be amortized to the contractual maturity. The guidance is effective for fiscal years beginning after December 15, 2018, with early adoption permitted, including adoption in an interim period. The amendments in this ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this update is not expected to have a material impact on the Company’s consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815) - Targeted Improvements to Accounting for Hedging Activities.” The amendments in this ASU was issued to better align an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. As a result, the amendments expand and refine hedge accounting for both nonfinancial and financial risk components and align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. Current GAAP contains limitations on how an entity can designate the hedged risk in certain cash flow and fair value hedging relationships. To address those current limitations, the amendments in this ASU permit hedge accounting for risk components in hedging relationships involving nonfinancial risk and interest rate risk. In addition, the amendments in this ASU change the guidance for designating fair value hedges of interest rate risk and for measuring the change in fair value of the hedged item in fair value hedges of interest rate risk. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company does not enter into derivatives that are designated as hedging instruments and as such, the adoption of this ASU is not expected to have an impact on the Company’s consolidated financial statements. In February 2018, the FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220) - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” This ASU was issued to address a narrow-scope financial reporting issue that arose as a result of the enactment of the Tax Cuts and Jobs Act (“Tax Reform”) on December 22, 2017. The objective of ASU 2018-02 is to address the tax effects of items within accumulated other comprehensive income (referred to as “stranded tax effects”) that do not reflect the appropriate tax rate enacted in the Tax Reform. As a result, the ASU 2018-02 allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the newly enacted federal corporate income tax rate. The amount of the reclassification would be the difference between the historical corporate income tax rate of 35 percent and the newly enacted corporate income tax rate of 21 percent. ASU 2018-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted, including adoption in an interim period. The amendments in this ASU may be applied retrospectively to each period in which the effect of the change in the U.S. Federal corporate income tax rate in the Tax Reform is recognized. The Company has early adopted ASU 2018-02 for the year ended December 31, 2017, and has elected not to reclassify the income tax effects of the Tax Reform from accumulated other comprehensive loss to retained earnings. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) - Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU updates the disclosure requirements on Fair Value measurements by 1) removing: the disclosures for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between levels, and the valuation processes for Level 3 fair value measurements; 2) modifying: disclosures for timing of liquidation of an investee’s assets and disclosures for uncertainty in measurement as of reporting date; and 3) adding: disclosures for changes in unrealized gains and losses included in other comprehensive income for recurring level 3 fair value measurements and disclosures for the range and weighted average of the significant unobservable inputs used to develop Level 3 fair value measurements. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, with early adoption permitted to any removed or modified disclosures and delay adoption of additional disclosures until the effective date. With the exception of the following, which should be applied prospectively, disclosures relating to changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the disclosures for uncertainty measurement, all other changes should be applied retrospectively to all periods presented upon the effective date. The adoption of this update will not have a material impact on the Company’s consolidated financial statements.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements 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. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or the most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact. The Company uses valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement costs). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability and developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability and developed based on the best information available in the circumstances. In that regard, a fair value hierarchy has been established for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. Movements within the fair value hierarchy are recognized at the end of the applicable reporting period. There were no transfers between the levels of the fair value hierarchy for the three and nine months ended September 30, 2018 . The fair value hierarchy is as follows: Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (for example, interest rates, volatilities, prepayment speeds, loss severities, credit risks and default rates) or inputs that are derived principally from or corroborated by observable market data by correlations or other means. Level 3 Inputs – Significant unobservable inputs that reflect an entity’s own assumptions that market participants would use in pricing the assets or liabilities. Assets and Liabilities Measured at Fair Value A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. Certain financial assets and financial liabilities are measured at fair value on a non-recurring basis, that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). Debt Securities Available-For-Sale Debt securities classified as available-for-sale are reported at fair value. Fair value for these debt securities is determined using inputs other than quoted prices that are based on market observable information (Level 2). Level 2 debt securities are priced through third-party pricing services or security industry sources that actively participate in the buying and selling of securities. Prices obtained from these sources include market quotations and matrix pricing. Matrix pricing is a mathematical technique used principally to value certain debt securities without relying exclusively on quoted prices for the specific securities, but comparing the debt securities to benchmark or comparable debt securities. Equity Investments Equity investments are reported at fair value. Fair value for these investments is determined using a quoted price in an active market or exchange (Level 1). Interest Rate Swaps The Company’s interest rate swaps are reported at fair value utilizing models provided by an independent, third-party and observable market data. When entering into an interest rate swap agreement, the Company is exposed to fair value changes due to interest rate movements, and also the potential nonperformance of our contract counterparty. Other Real Estate Owned and Impaired Loans Other real estate owned and loans measured for impairment based on the fair value of the underlying collateral are recorded at estimated fair value, less estimated selling costs. Fair value is based on independent appraisals. The following table summarizes financial assets and financial liabilities measured at fair value as of September 30, 2018 and December 31, 2017 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands): Fair Value Measurements at Reporting Date Using: Total Fair Value Level 1 Inputs Level 2 Inputs Level 3 Inputs September 30, 2018 Items measured on a recurring basis: Debt securities available-for-sale $ 100,015 $ — $ 100,015 $ — Equity investments 9,519 9,519 — — Interest rate swap asset 557 — 557 — Interest rate swap liability 636 — 636 — Items measured on a non-recurring basis: Other real estate owned 6,231 — — 6,231 Loans measured for impairment based on the fair value of the underlying collateral 13,001 — — 13,001 December 31, 2017 Items measured on a recurring basis: Debt securities available-for-sale $ 81,581 $ — $ 81,581 $ — Equity investments 8,700 8,700 — — Items measured on a non-recurring basis: Other real estate owned 8,186 — — 8,186 Loans measured for impairment based on the fair value of the underlying collateral 16,496 — — 16,496 Assets and Liabilities Disclosed at Fair Value A description of the valuation methodologies used for assets and liabilities disclosed at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy is set forth below. Cash and Due from Banks For cash and due from banks, the carrying amount approximates fair value. Debt Securities Held-to-Maturity Debt securities classified as held-to-maturity are carried at amortized cost, as the Company has the positive intent and ability to hold these debt securities to maturity. The Company determines the fair value of the debt securities utilizing Level 1, Level 2 and, infrequently, Level 3 inputs. In general, fair value is based upon quoted market prices, where available. Most of the Company’s investment and mortgage-backed securities, however, are fixed income instruments that are not quoted on an exchange, but are bought and sold in active markets. Prices for these instruments are obtained through third-party pricing vendors or security industry sources that actively participate in the buying and selling of debt securities. Prices obtained from these sources include market quotations and matrix pricing. Matrix pricing is a mathematical technique used principally to value certain debt securities without relying exclusively on quoted prices for the specific debt securities, but comparing the debt securities to benchmark or comparable debt securities. Management’s policy is to obtain and review all available documentation from the third-party pricing service relating to their fair value determinations, including their methodology and summary of inputs. Management reviews this documentation, makes inquiries of the third-party pricing service and decides as to the level of the valuation inputs. Based on the Company’s review of the available documentation from the third-party pricing service, management concluded that Level 2 inputs were utilized for all securities except for certain state and municipal obligations known as bond anticipation notes (“BANs”) where management utilized Level 3 inputs. Restricted Equity Investments The fair value for Federal Home Loan Bank of New York and Federal Reserve Bank stock is its carrying value since this is the amount for which it could be redeemed. There is no active market for this stock and the Company is required to maintain a minimum investment as stipulated by the respective agencies. Loans Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as residential mortgage, consumer and commercial. Each loan category is further segmented into fixed and adjustable rate interest terms. Fair value of performing and non-performing loans was estimated by discounting the future cash flows, net of estimated prepayments, at a rate for which similar loans would be originated to new borrowers with similar terms. Deposits Other than Time Deposits The fair value of deposits with no stated maturity, such as non-interest-bearing demand deposits, savings, and interest-bearing checking accounts and money market accounts is, by definition, equal to the amount payable on demand. The related insensitivity of the majority of these deposits to interest rate changes creates a significant inherent value which is not reflected in the fair value reported. Time Deposits The fair value of time deposits is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits of similar remaining maturities. Securities Sold Under Agreements to Repurchase with Retail Customers Fair value approximates the carrying amount as these borrowings are payable on demand and the interest rate adjusts monthly. Borrowed Funds Fair value estimates are based on discounting contractual cash flows using rates which approximate the rates offered for borrowings of similar remaining maturities. The book value and estimated fair value of the Bank’s significant financial instruments not recorded at fair value as of September 30, 2018 and December 31, 2017 are presented in the following tables (in thousands): Fair Value Measurements at Reporting Date Using: September 30, 2018 Book Value Level 1 Inputs Level 2 Inputs Level 3 Inputs Financial Assets: Cash and due from banks $ 148,362 $ 148,362 $ — $ — Debt securities held-to-maturity 883,540 — 852,348 11,825 Restricted equity investments 57,143 — — 57,143 Loans receivable, net and loans held-for-sale (1) 5,544,691 — — 5,464,517 Financial Liabilities: Deposits other than time deposits 5,001,139 — 5,001,139 — Time deposits 853,111 — 836,692 — Federal Home Loan Bank advances and other borrowings 556,279 — 559,107 — Securities sold under agreements to repurchase with retail customers 61,044 61,044 — — Fair Value Measurements at Reporting Date Using: December 31, 2017 Book Value Level 1 Inputs Level 2 Inputs Level 3 Inputs Financial Assets: Cash and due from banks $ 109,613 $ 109,613 $ — $ — Debt securities held-to-maturity 764,062 — 751,182 10,478 Restricted equity investments 19,724 — — 19,724 Loans receivable, net and loans held-for-sale (1) 3,966,014 — — 3,962,689 Financial Liabilities: Deposits other than time deposits 3,735,694 — 3,735,694 — Time deposits 607,104 — 599,677 — Federal Home Loan Bank advances and other borrowings 345,210 — 341,820 — Securities sold under agreements to repurchase with retail customers 79,668 79,668 — — (1) In accordance with the prospective adoption of ASU 2016-01, the fair value of loans was measured using the exit price notion as of September 30, 2018 . The fair value of loans was measured using the entry price notion as of December 31, 2017 . Limitations Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because a limited market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments and other significant unobservable inputs. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Fair value estimates are based on existing balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Significant assets and liabilities that are not considered financial assets or liabilities include premises and equipment, Bank Owned Life Insurance, deferred tax assets and goodwill. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.

Derivatives, Hedging Activities

Derivatives, Hedging Activities, and Other Financial Instruments	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives, Hedging Activities, and Other Financial Instruments	Derivatives, Hedging Activities and Other Financial Instruments The Company enters into derivative financial instruments which involve, to varying degrees, interest rate, market and credit risk. The Company manages these risks as part of its asset and liability management process and through credit policies and procedures, seeking to minimize counterparty credit risk by establishing credit limits and collateral agreements. The Company utilizes certain derivative financial instruments to enhance its ability to manage interest rate risk that exists as part of its ongoing business operations. The derivative financial instruments entered into by the Company are an economic hedge of a derivative offering to Bank customers. The Company does not use derivative financial instruments for trading purposes. Customer Derivatives – Interest Rate Swaps The Company enters into interest rate swaps that allow commercial loan customers to effectively convert a variable-rate commercial loan agreement to a fixed-rate commercial loan agreement. Under these agreements, the Company enters into a variable-rate loan agreement with a customer in addition to an interest rate swap agreement, which serves to effectively swap the customer’s variable-rate loan into a fixed-rate loan. The Company then enters into a corresponding swap agreement with a third party in order to economically hedge its exposure through the customer agreement. The interest rate swaps with both the customers and third parties are not designated as hedges under FASB Accounting Standards Codification (“ASC”) Topic 815, Derivatives and Hedging, and are marked to market through earnings. As the interest rate swaps are structured to offset each other, changes to the underlying benchmark interest rates considered in the valuation of these instruments do not result in an impact to earnings; however, there may be fair value adjustments related to credit quality variations between counterparties, which may impact earnings as required by FASB ASC Topic 820, Fair Value Measurements. The Company recognized a loss of $78,000 and a loss of $76,000 in other income resulting from fair value adjustments during the three and nine months ended September 30, 2018 , respectively. The table below presents the notional and fair value of derivatives not designated as hedging instruments as well as their location on the consolidated statements of financial condition as of September 30, 2018 (in thousands): September 30, 2018 Balance Sheet Location Notional Fair Value Other assets $ 59,729 $ 557 Other liabilities 59,729 636 Credit risk-related Contingent Features The Company is a party to an International Swaps and Derivatives Association agreement with a third party broker-dealer that requires a minimum dollar transfer amount upon a margin call. This requirement is dependent on certain specified credit measures. The amount of collateral posted with the third party at September 30, 2018 was $3.3 million . The amount of collateral posted with the third party is deemed to be sufficient to collateralize both the fair market value change as well as any additional amounts that may be required as a result of a change in the specified credit measures. The aggregate fair value of all derivative financial instruments in a liability position with credit measure contingencies and entered into with the third party was $636,000 at September 30, 2018 .

Subsequent Event

Subsequent Event	9 Months Ended
	Sep. 30, 2018
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On October 25, 2018, the Company announced the execution of a definitive agreement and plan of merger (the “merger agreement”) with Capital Bank of New Jersey (“Capital Bank”). The transaction is subject to receipt of the approval of Capital Bank’s stockholders and required regulatory approval. Subject to receipt of those approvals and fulfillment of other customary closing conditions, the Company expects to close the transaction in the first quarter of 2019.

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU” or “Update”) 2014-09, “Revenue from Contracts with Customers (Topic 606)” and subsequent related Updates modifies the guidance used to recognize revenue from contracts with customers for transfers of goods or services and transfers of nonfinancial assets, unless those contracts are within the scope of other guidance. The Updates also require new qualitative and quantitative disclosures, including disaggregation of revenues and descriptions of performance obligations. The amendments in this update were effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. On January 1, 2018, the Company adopted ASU 2014-09 and all subsequent amendments to the ASU (collectively, “ASC 606”). The majority of the Company’s revenues are not subject to ASC 606, including revenue generated from financial instruments, such as interest and dividend income, including loans and securities, as these activities are subject to other U.S. Generally Accepted Accounting Principles (“GAAP”). Revenue generating activities that are within the scope of ASC 606 are presented within non-interest income and are recognized as revenue as the Company satisfies its obligation to the customer. Descriptions of revenue generating activities that are within the scope of ASC 606, which are presented in the Consolidated Statements of Income as components of other income are as follows: • Bankcard services revenue - The Company generates other non-interest income from Bankcard services, which includes interchange revenue and merchant services revenue. The calculation of the revenue collected is based on customer transactions, which do not have a fixed duration. When there is a transaction, the performance obligation is fulfilled. The Company recognizes revenue per underlying transaction and recognizes the revenue when the performance obligation is satisfied at a point in time. • Wealth management revenue - The Company provides customers with sound financial solutions and comprehensive wealth management products. Wealth management accounts earn minimum annual fees and may earn additional fees and service charges. Fees and service charges from wealth management accounts may include numerous fees such as Bill Pay fees, extraordinary service fees, unique asset fees, and transaction fees. The Company will recognize the fee when received because the Company provided the service to its customer at that time, and has no future performance obligation. Therefore, each month the Company will accrue and recognize the monthly portion of the minimum annual fee as a result of providing advisory services. If a customer utilizes additional services such as a wire transfer or bill pay, or any other advisory service outlined in their respective agreements, the Company will recognize revenue at that time, since there are no future performance obligations during the existing contract. • Fees and service charges - The Company has multiple types of deposit accounts that may earn fees and service charges. Fees and service charges from deposit accounts represent general service fees for monthly account maintenance and activity-or-transaction-based fees and consist of transaction-based revenue, time-based revenue (service period), item-based revenue or some other individual attribute-based revenue. Revenue is recognized when the performance obligation is satisfied, which is generally monthly for account maintenance services or when a transaction has been completed (such as a wire transfer). Payment for such performance obligations are typically received at the time the performance obligations are satisfied. The Company adopted the ASU using the modified retrospective method as of January 1, 2018. The adoption of this ASU did not result in a change to the accounting for any of the in-scope revenue streams; as such no cumulative effect adjustment was recorded on the Company’s consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, “Financial Instruments - Overall (Subtopic 825-10) Recognition and Measurement of Financial Assets and Financial Liabilities.” The main objective in developing this new ASU is to enhance the reporting model for financial instruments to provide users of financial statements with more useful information. The update requires equity investments to be measured at fair value with changes in fair value recognized in net income. It simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a quantitative assessment to identify impairment. The amendment eliminates the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. It requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. Financial assets and financial liabilities are to be presented separately by measurement category and the need for a valuation allowance on a deferred tax asset related to available-for-sale securities should be evaluated with other deferred tax assets. The amendments in this update were effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company adopted this ASU in its entirety on January 1, 2018, and has appropriately reflected the changes throughout the Company’s consolidated financial statements. The adoption of this ASU resulted in an impact to retained earnings and other comprehensive income of $147,000 . In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” This ASU requires all lessees to recognize a lease liability and a right-of-use asset, measured at the present value of the future minimum lease payments, at the lease commencement date. Lessor accounting remains largely unchanged under the new guidance. The guidance is effective for fiscal years beginning after December 15, 2018, including interim reporting periods within that reporting period, with early adoption permitted. A modified retrospective approach must be applied for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company is currently assessing the impact that the guidance will have on the Company’s consolidated financial statements. The Company has begun its evaluation of the amended guidance including the potential impact on its consolidated financial statements. To date, the Company has identified its leased real estate as within the scope of the guidance and continues to evaluate the impact of the guidance, including determining whether other contracts exist that are deemed to be in scope. The Company expects total assets and total liabilities will increase by similar amounts. Further, to date, no guidance has been issued by either the Company’s or the Bank’s primary regulator with respect to how the impact of the amended standard is to be treated for regulatory capital purposes. In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments.” This ASU significantly changes how entities will measure credit losses for most financial assets and certain other instruments that aren’t measured at fair value through net income. The standard will replace today’s “incurred loss” approach with an “expected loss” model. The new model, referred to as the current expected credit loss (“CECL”) model, will apply to: (1) financial assets subject to credit losses and measured at amortized cost, and (2) certain off-balance sheet credit exposures. This includes, but is not limited to, loans, leases, held-to-maturity securities, loan commitments, and financial guarantees. The CECL model does not apply to available-for-sale (“AFS”) debt securities. For AFS debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. As a result, entities will recognize improvements to estimated credit losses immediately in earnings rather than as interest income over time, as they do today. The ASU also simplifies the accounting model for purchased credit-impaired debt securities and loans. ASU 2016-13 also expands the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating the allowance for loan and lease losses. In addition, entities will need to disclose the amortized cost balance for each class of financial asset by credit quality indicator, disaggregated by the year of origination. ASU No. 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted for interim and annual reporting periods beginning after December 15, 2018. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (i.e., modified retrospective approach). The Company has begun its evaluation of the amended guidance including the potential impact on its consolidated financial statements. As a result of the required change in approach toward determining estimated credit losses from the current “incurred loss” model to one based on estimated cash flows over a loan’s contractual life, adjusted for prepayments (a “life of loan” model), the Company expects that the new guidance will result in an increase in the allowance for loan losses, particularly for longer duration loan portfolios. The Company also expects that the new guidance may result in an allowance for debt securities. In both cases, the extent of the change is indeterminable at this time as it will be dependent upon portfolio composition and credit quality at the adoption date, as well as economic conditions and forecasts at that time. In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805) - Clarifying the Definition of a Business.” This ASU narrows the definition of a business and clarifies that, to be considered a business, the fair value of the gross assets acquired (or disposed of) may not be substantially all concentrated in a single identifiable asset or group of similar assets. In addition, in order to be considered a business, a set of activities and assets must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs. This ASU was effective for fiscal years beginning after December 15, 2017; early adoption was permitted on a limited basis. The Company adopted this guidance on January 1, 2018 and it did not have a material impact on the Company’s consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350) - Simplifying the Test for Goodwill Impairment.” This ASU intends to simplify the subsequent measurement of goodwill, eliminating Step 2 from the goodwill impairment test. Instead, an entity should perform its annual goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge by which the carrying amount exceeds the reporting unit’s fair value; however the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The ASU also eliminates the requirement for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment. ASU No. 2017-04 is effective for fiscal years beginning after December 15, 2019; early adoption is permitted for annual goodwill impairment tests performed on testing dates after January 1, 2017. The adoption of this update will not have a material impact on the Company’s consolidated financial statements. In March 2017, the FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization on Purchased Callable Debt Securities.” This ASU requires the amortization of premiums to the earliest call date on debt securities with call features that are explicit, noncontingent and callable at fixed prices and on preset dates. This ASU does not impact securities held as a discount, as the discount continues to be amortized to the contractual maturity. The guidance is effective for fiscal years beginning after December 15, 2018, with early adoption permitted, including adoption in an interim period. The amendments in this ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this update is not expected to have a material impact on the Company’s consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815) - Targeted Improvements to Accounting for Hedging Activities.” The amendments in this ASU was issued to better align an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. As a result, the amendments expand and refine hedge accounting for both nonfinancial and financial risk components and align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. Current GAAP contains limitations on how an entity can designate the hedged risk in certain cash flow and fair value hedging relationships. To address those current limitations, the amendments in this ASU permit hedge accounting for risk components in hedging relationships involving nonfinancial risk and interest rate risk. In addition, the amendments in this ASU change the guidance for designating fair value hedges of interest rate risk and for measuring the change in fair value of the hedged item in fair value hedges of interest rate risk. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company does not enter into derivatives that are designated as hedging instruments and as such, the adoption of this ASU is not expected to have an impact on the Company’s consolidated financial statements. In February 2018, the FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220) - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” This ASU was issued to address a narrow-scope financial reporting issue that arose as a result of the enactment of the Tax Cuts and Jobs Act (“Tax Reform”) on December 22, 2017. The objective of ASU 2018-02 is to address the tax effects of items within accumulated other comprehensive income (referred to as “stranded tax effects”) that do not reflect the appropriate tax rate enacted in the Tax Reform. As a result, the ASU 2018-02 allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the newly enacted federal corporate income tax rate. The amount of the reclassification would be the difference between the historical corporate income tax rate of 35 percent and the newly enacted corporate income tax rate of 21 percent. ASU 2018-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted, including adoption in an interim period. The amendments in this ASU may be applied retrospectively to each period in which the effect of the change in the U.S. Federal corporate income tax rate in the Tax Reform is recognized. The Company has early adopted ASU 2018-02 for the year ended December 31, 2017, and has elected not to reclassify the income tax effects of the Tax Reform from accumulated other comprehensive loss to retained earnings. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) - Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU updates the disclosure requirements on Fair Value measurements by 1) removing: the disclosures for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between levels, and the valuation processes for Level 3 fair value measurements; 2) modifying: disclosures for timing of liquidation of an investee’s assets and disclosures for uncertainty in measurement as of reporting date; and 3) adding: disclosures for changes in unrealized gains and losses included in other comprehensive income for recurring level 3 fair value measurements and disclosures for the range and weighted average of the significant unobservable inputs used to develop Level 3 fair value measurements. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, with early adoption permitted to any removed or modified disclosures and delay adoption of additional disclosures until the effective date. With the exception of the following, which should be applied prospectively, disclosures relating to changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the disclosures for uncertainty measurement, all other changes should be applied retrospectively to all periods presented upon the effective date. The adoption of this update will not have a material impact on the Company’s consolidated financial statements.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2018
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Information	The pro forma information shown reflects adjustments related to certain purchase accounting fair value adjustments; amortization of core deposit and other intangibles; and related income tax effects. (in thousands) Pro forma Nine Months Ended September 30, 2018 Pro forma Nine Months Ended September 30, 2017 Net interest income $ 184,887 $ 181,572 Provision for loan losses 2,984 2,199 Non-interest income 26,894 29,590 Non-interest expense 164,538 146,154 Net income $ 35,575 $ 45,027 Fully diluted earnings per share $ 0.74 $ 0.93
Sun Bancorp, Inc.
Business Acquisition [Line Items]
Summary of Assets Acquired and Liabilities Assumed and Their Initial Fair Value Estimates	The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of the acquisition for Sun, net of total consideration paid (in thousands): At January 31, 2018 Estimated Total Purchase Price: $ 474,930 Assets acquired: Cash and cash equivalents $ 68,632 Securities 254,522 Loans 1,517,172 Accrued interest receivable 5,621 Bank Owned Life Insurance 85,238 Deferred tax asset 57,712 Other assets 42,105 Core deposit intangible 11,897 Total assets acquired 2,042,899 Liabilities assumed: Deposits (1,616,073 ) Borrowings (127,747 ) Other liabilities (11,752 ) Total liabilities assumed (1,755,572 ) Net assets acquired $ 287,327 Goodwill recorded in the merger $ 187,603

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Reconciliation of Shares Outstanding for Basic and Diluted Earnings per Share	The following reconciles shares outstanding for basic and diluted earnings per share for the three and nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended Nine Months Ended 2018 2017 2018 2017 Weighted average shares outstanding 48,337 32,545 46,913 32,456 Less: Unallocated ESOP shares (546 ) (306 ) (401 ) (315 ) Unallocated incentive award shares and shares held by deferred compensation plan (106 ) (55 ) (61 ) (68 ) Average basic shares outstanding 47,685 32,184 46,451 32,073 Add: Effect of dilutive securities: Incentive awards and shares held by deferred compensation plan 887 922 952 1,037 Average diluted shares outstanding 48,572 33,106 47,403 33,110

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Estimated Fair Value of Securities Available-for-Sale and Held-to-Maturity	The amortized cost and estimated fair value of debt securities available-for-sale and held-to-maturity at September 30, 2018 , and December 31, 2017 , are as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value At September 30, 2018 Debt securities available-for-sale: Investment securities - U.S. agency obligations $ 100,450 $ — $ (1,577 ) $ 98,873 Mortgage-backed securities - FNMA 1,153 — (11 ) 1,142 Total debt securities available-for-sale $ 101,603 $ — $ (1,588 ) $ 100,015 Debt securities held-to-maturity: Investment securities: U.S. agency obligations $ 14,974 $ — $ (192 ) $ 14,782 State and municipal obligations 134,988 — (2,885 ) 132,103 Corporate debt securities 64,819 921 (3,035 ) 62,705 Total investment securities 214,781 921 (6,112 ) 209,590 Mortgage-backed securities: FHLMC 249,884 45 (8,126 ) 241,803 FNMA 289,210 755 (9,382 ) 280,583 GNMA 130,847 176 (2,858 ) 128,165 SBA 4,126 — (94 ) 4,032 Total mortgage-backed securities 674,067 976 (20,460 ) 654,583 Total debt securities held-to-maturity $ 888,848 $ 1,897 $ (26,572 ) $ 864,173 Total debt securities $ 990,451 $ 1,897 $ (28,160 ) $ 964,188 At December 31, 2017 Debt securities available-for-sale: Investment securities - U.S. agency obligations $ 82,378 $ — $ (797 ) $ 81,581 Debt securities held-to-maturity: Investment securities: U.S. agency obligations $ 14,968 $ — $ (65 ) $ 14,903 State and municipal obligations 149,958 219 (1,475 ) 148,702 Corporate debt securities 76,024 312 (3,962 ) 72,374 Total investment securities 240,950 531 (5,502 ) 235,979 Mortgage-backed securities: FHLMC 186,921 151 (2,937 ) 184,135 FNMA 263,103 1,193 (3,000 ) 261,296 GNMA 75,243 64 (928 ) 74,379 SBA 5,843 28 — 5,871 Total mortgage-backed securities 531,110 1,436 (6,865 ) 525,681 Total debt securities held-to-maturity $ 772,060 $ 1,967 $ (12,367 ) $ 761,660 Total debt securities $ 854,438 $ 1,967 $ (13,164 ) $ 843,241
Carrying Value of Held-to-Maturity Investment Securities	The carrying value of the debt securities held-to-maturity at September 30, 2018 , and December 31, 2017 , is as follows (in thousands): September 30, 2018 December 31, 2017 Amortized cost $ 888,848 $ 772,060 Net loss on date of transfer from available-for-sale (13,347 ) (13,347 ) Accretion of net unrealized loss on securities reclassified as held-to-maturity 8,039 5,349 Carrying value $ 883,540 $ 764,062
Amortized Cost and Estimated Fair Value of Investment Securities by Contractual Maturity	The amortized cost and estimated fair value of investment securities at September 30, 2018 by contractual maturity are shown below (in thousands). Actual maturities may differ from contractual maturities in instances where issuers have the right to call or prepay obligations with or without call or prepayment penalties. At September 30, 2018 , corporate debt securities with an amortized cost of $53.8 million and estimated fair value of $51.8 million were callable prior to the maturity date. September 30, 2018 Amortized Cost Estimated Fair Value Less than one year $ 56,753 $ 56,522 Due after one year through five years 156,879 153,904 Due after five years through ten years 90,804 86,373 Due after ten years 10,795 11,664 $ 315,231 $ 308,463
Estimated Fair Value and Unrealized Loss for Securities Available-for-Sale and Held-to-Maturity	The estimated fair value and unrealized losses of debt securities available-for-sale and held-to-maturity at September 30, 2018 and December 31, 2017 , segregated by the duration of the unrealized losses, are as follows (in thousands): At September 30, 2018 Less than 12 months 12 months or longer Total Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Estimated Fair Value Unrealized Losses Debt securities available-for-sale: Investment securities - U.S. agency obligations $ 57,252 $ (675 ) $ 41,621 $ (902 ) $ 98,873 $ (1,577 ) Mortgage-backed securities - FNMA 1,142 (11 ) — — 1,142 (11 ) Total debt securities available-for-sale 58,394 (686 ) 41,621 (902 ) 100,015 (1,588 ) Debt securities held-to-maturity: Investment securities: U.S. agency obligations 9,835 (129 ) 4,947 (63 ) 14,782 (192 ) State and municipal obligations 52,779 (744 ) 67,500 (2,141 ) 120,279 (2,885 ) Corporate debt securities 4,903 (68 ) 41,583 (2,967 ) 46,486 (3,035 ) Total investment securities 67,517 (941 ) 114,030 (5,171 ) 181,547 (6,112 ) Mortgage-backed securities: FHLMC 125,973 (2,463 ) 112,290 (5,663 ) 238,263 (8,126 ) FNMA 120,922 (3,594 ) 112,293 (5,788 ) 233,215 (9,382 ) GNMA 52,813 (1,042 ) 51,237 (1,816 ) 104,050 (2,858 ) SBA 4,032 (94 ) — — 4,032 (94 ) Total mortgage-backed securities 303,740 (7,193 ) 275,820 (13,267 ) 579,560 (20,460 ) Total debt securities held-to-maturity 371,257 (8,134 ) 389,850 (18,438 ) 761,107 (26,572 ) Total debt securities $ 429,651 $ (8,820 ) $ 431,471 $ (19,340 ) $ 861,122 $ (28,160 ) At December 31, 2017 Less than 12 months 12 months or longer Total Estimated Unrealized Estimated Unrealized Estimated Unrealized Debt securities available-for-sale: Investment securities - U.S. agency obligations $ 69,375 $ (496 ) $ 12,206 $ (301 ) $ 81,581 $ (797 ) Debt securities held-to-maturity: Investment securities: U.S. agency obligations 14,903 (65 ) — — 14,903 (65 ) State and municipal obligations 104,883 (1,153 ) 14,363 (322 ) 119,246 (1,475 ) Corporate debt securities 4,035 (30 ) 56,106 (3,932 ) 60,141 (3,962 ) Total investment securities 123,821 (1,248 ) 70,469 (4,254 ) 194,290 (5,502 ) Mortgage-backed securities: FHLMC 98,138 (781 ) 68,238 (2,156 ) 166,376 (2,937 ) FNMA 132,982 (1,058 ) 65,060 (1,942 ) 198,042 (3,000 ) GNMA 26,105 (223 ) 45,281 (705 ) 71,386 (928 ) Total mortgage-backed securities 257,225 (2,062 ) 178,579 (4,803 ) 435,804 (6,865 ) Total debt securities held-to-maturity 381,046 (3,310 ) 249,048 (9,057 ) 630,094 (12,367 ) Total debt securities $ 450,421 $ (3,806 ) $ 261,254 $ (9,358 ) $ 711,675 $ (13,164 )
Amortized Cost, Estimated Fair Value and Credit Rating of Corporate Debt Securities	At September 30, 2018 , the amortized cost, estimated fair value and credit rating of the individual corporate debt securities in an unrealized loss position for greater than one year are as follows (in thousands): Security Description Amortized Cost Estimated Fair Value Credit Rating Moody’s/ S&P Chase Capital $ 10,000 $ 9,350 Baa2/BBB- Wells Fargo Capital 5,000 4,650 A1/BBB Huntington Capital 5,000 4,525 Baa2/BB+ Keycorp Capital 5,000 4,600 Baa2/BB+ PNC Capital 5,000 4,678 Baa1/BBB- State Street Capital 5,000 4,700 A3/BBB SunTrust Capital 5,000 4,625 Not Rated/BB+ Southern Company 1,516 1,485 Baa2/BBB+ AT&T Inc. 1,510 1,480 Baa2/BBB Celgene 1,524 1,490 Baa2/BBB+ $ 44,550 $ 41,583

Loans Receivable, Net (Tables)

Loans Receivable, Net (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Components of Loans Receivable, Net	Loans receivable, net at September 30, 2018 and December 31, 2017 consisted of the following (in thousands): September 30, 2018 December 31, 2017 Commercial: Commercial and industrial $ 342,555 $ 187,645 Commercial real estate – owner occupied 734,720 569,497 Commercial real estate – investor 2,011,897 1,186,302 Total commercial 3,089,172 1,943,444 Consumer: Residential real estate 2,019,918 1,748,590 Home equity loans and lines 358,728 281,143 Other consumer 74,555 1,225 Total consumer 2,453,201 2,030,958 5,542,373 3,974,402 Purchased credit impaired (“PCI”) loans 9,700 1,712 Total Loans 5,552,073 3,976,114 Deferred origination costs, net 8,707 5,380 Allowance for loan losses (16,821 ) (15,721 ) Total loans, net $ 5,543,959 $ 3,965,773
Analysis of Allowance for Loan Losses	An analysis of the allowance for loan losses for the three and nine months ended September 30, 2018 and 2017 is as follows (in thousands): Three Months Ended Nine Months Ended 2018 2017 2018 2017 Balance at beginning of period $ 16,691 $ 16,557 $ 15,721 $ 15,183 Provision charged to operations 907 1,165 2,984 3,030 Charge-offs (891 ) (1,357 ) (2,708 ) (2,861 ) Recoveries 114 219 824 1,232 Balance at end of period $ 16,821 $ 16,584 $ 16,821 $ 16,584
Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method Excluding PCI Loans	The following table presents an analysis of the allowance for loan losses for the three and nine months ended September 30, 2018 and 2017 and the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2018 and December 31, 2017 , excluding PCI loans (in thousands): Commercial and Industrial Commercial Real Estate – Owner Occupied Commercial Real Estate – Investor Residential Real Estate Consumer Unallocated Total For the three months ended September 30, 2018 Allowance for loan losses: Balance at beginning of period $ 2,080 $ 2,340 $ 9,058 $ 2,126 $ 526 $ 561 $ 16,691 Provision (benefit) charged to operations (520 ) 187 661 578 57 (56 ) 907 Charge-offs (146 ) — (138 ) (535 ) (72 ) — (891 ) Recoveries 28 1 9 57 19 — 114 Balance at end of period $ 1,442 $ 2,528 $ 9,590 $ 2,226 $ 530 $ 505 $ 16,821 For the three months ended September 30, 2017 Allowance for loan losses: Balance at beginning of period $ 2,253 $ 3,097 $ 8,367 $ 1,492 $ 930 $ 418 $ 16,557 Provision (benefit) charged to operations (180 ) 119 81 1,465 (122 ) (198 ) 1,165 Charge-offs (6 ) — — (1,284 ) (67 ) — (1,357 ) Recoveries 50 — 24 128 17 — 219 Balance at end of period $ 2,117 $ 3,216 $ 8,472 $ 1,801 $ 758 $ 220 $ 16,584 For the nine months ended September 30, 2018 Allowance for loan losses: Balance at beginning of period $ 1,801 $ 3,175 $ 7,952 $ 1,804 $ 614 $ 375 $ 15,721 Provision (benefit) charged to operations (238 ) (734 ) 2,706 1,079 41 130 2,984 Charge-offs (202 ) (91 ) (1,239 ) (936 ) (240 ) — (2,708 ) Recoveries 81 178 171 279 115 — 824 Balance at end of period $ 1,442 $ 2,528 $ 9,590 $ 2,226 $ 530 $ 505 $ 16,821 For the nine months ended September 30, 2017 Allowance for loan losses: Balance at beginning of period $ 2,037 $ 2,999 $ 6,361 $ 2,245 $ 1,110 $ 431 $ 15,183 Provision (benefit) charged to operations (221 ) 167 2,164 1,477 (346 ) (211 ) 3,030 Charge-offs (94 ) (73 ) (84 ) (2,485 ) (125 ) — (2,861 ) Recoveries 395 123 31 564 119 — 1,232 Balance at end of period $ 2,117 $ 3,216 $ 8,472 $ 1,801 $ 758 $ 220 $ 16,584 September 30, 2018 Allowance for loan losses: Ending allowance balance attributed to loans: Individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ — Collectively evaluated for impairment 1,442 2,528 9,590 2,226 530 505 16,821 Total ending allowance balance $ 1,442 $ 2,528 $ 9,590 $ 2,226 $ 530 $ 505 $ 16,821 Loans: Loans individually evaluated for impairment $ 1,738 $ 5,446 $ 12,760 $ 10,454 $ 2,690 $ — $ 33,088 Loans collectively evaluated for impairment 340,817 729,274 1,999,137 2,009,464 430,593 — 5,509,285 Total ending loan balance $ 342,555 $ 734,720 $ 2,011,897 $ 2,019,918 $ 433,283 $ — $ 5,542,373 Commercial and Industrial Commercial Real Estate – Owner Occupied Commercial Real Estate – Investor Residential Real Estate Consumer Unallocated Total December 31, 2017 Allowance for loan losses: Ending allowance balance attributed to loans: Individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ — Collectively evaluated for impairment 1,801 3,175 7,952 1,804 614 375 15,721 Total ending allowance balance $ 1,801 $ 3,175 $ 7,952 $ 1,804 $ 614 $ 375 $ 15,721 Loans: Loans individually evaluated for impairment $ 864 $ 15,132 $ 17,923 $ 10,605 $ 2,464 $ — $ 46,988 Loans collectively evaluated for impairment 186,781 554,365 1,168,379 1,737,985 279,904 — 3,927,414 Total ending loan balance $ 187,645 $ 569,497 $ 1,186,302 $ 1,748,590 $ 282,368 $ — $ 3,974,402
Summary of Impaired Loans Excluding PCI Loans	A summary of impaired loans at September 30, 2018 , and December 31, 2017 , is as follows, excluding PCI loans (in thousands): September 30, 2018 December 31, 2017 Impaired loans with no allocated allowance for loan losses $ 33,088 $ 46,988 Impaired loans with allocated allowance for loan losses — — $ 33,088 $ 46,988 Amount of the allowance for loan losses allocated $ — $ —
Summary of Loans Individually Evaluated for Impairment by Loan Portfolio Segment Excluding PCI Loans	The summary of loans individually evaluated for impairment by loan portfolio segment as of September 30, 2018 , and December 31, 2017 and for the three and nine months ended September 30, 2018 and 2017 , is as follows, excluding PCI loans (in thousands): Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated As of September 30, 2018 With no related allowance recorded: Commercial and industrial $ 1,824 $ 1,738 $ — Commercial real estate – owner occupied 5,459 5,446 — Commercial real estate – investor 15,290 12,760 — Residential real estate 10,828 10,454 — Consumer 3,009 2,690 — $ 36,410 $ 33,088 $ — With an allowance recorded: Commercial and industrial $ — $ — $ — Commercial real estate – owner occupied — — — Commercial real estate – investor — — — Residential real estate — — — Consumer — — — $ — $ — $ — As of December 31, 2017 With no related allowance recorded: Commercial and industrial $ 895 $ 864 $ — Commercial real estate – owner occupied 15,832 15,132 — Commercial real estate – investor 19,457 17,923 — Residential real estate 10,951 10,605 — Consumer 2,941 2,464 — $ 50,076 $ 46,988 $ — With an allowance recorded: Commercial and industrial $ — $ — $ — Commercial real estate – owner occupied — — — Commercial real estate – investor — — — Residential real estate — — — Consumer — — — $ — $ — $ — Three Months Ended September 30, 2018 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ 982 $ 69 $ 908 $ 26 Commercial real estate – owner occupied 5,484 75 11,217 335 Commercial real estate – investor 12,191 102 11,147 240 Residential real estate 10,741 119 12,791 128 Consumer 2,782 33 2,495 36 $ 32,180 $ 398 $ 38,558 $ 765 With an allowance recorded: Commercial and industrial $ 736 $ — $ — $ — Commercial real estate – owner occupied — — — — Commercial real estate – investor — — 4,551 13 Residential real estate — — — — Consumer — — — — $ 736 $ — $ 4,551 $ 13 Nine Months Ended September 30, 2018 2017 Average Interest Average Interest With no related allowance recorded: Commercial and industrial $ 906 $ 85 $ 588 $ 50 Commercial real estate – owner occupied 8,978 226 11,080 520 Commercial real estate – investor 14,259 304 6,550 487 Residential real estate 10,873 356 11,009 401 Consumer 2,629 116 2,368 106 $ 37,645 $ 1,087 $ 31,595 $ 1,564 With an allowance recorded: Commercial and industrial $ 736 $ — $ — $ — Commercial real estate – owner occupied — — — — Commercial real estate – investor 838 — 4,233 81 Residential real estate — — 1,981 62 Consumer — — 148 6 $ 1,574 $ — $ 6,362 $ 149
Recorded Investment in Non-Accrual Loans by Loan Portfolio Segment Excluding PCI Loans	The following table presents the recorded investment in non-accrual loans by loan portfolio segment as of September 30, 2018 and December 31, 2017 , excluding PCI loans (in thousands): September 30, 2018 December 31, 2017 Commercial and industrial $ 1,727 $ 503 Commercial real estate – owner occupied 511 5,962 Commercial real estate – investor 8,082 8,281 Residential real estate 6,390 4,190 Consumer 2,529 1,929 $ 19,239 $ 20,865
Aging of Recorded Investment in Past Due Loans Excluding PCI Loans	The following table presents the aging of the recorded investment in past due loans as of September 30, 2018 and December 31, 2017 by loan portfolio segment, excluding PCI loans (in thousands): 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Past Due Total Past Due Loans Not Past Due Total September 30, 2018 Commercial and industrial $ 55 $ 37 $ 28 $ 120 $ 342,435 $ 342,555 Commercial real estate – owner occupied 3,433 876 197 4,506 730,214 734,720 Commercial real estate – investor 2,788 666 7,938 11,392 2,000,505 2,011,897 Residential real estate 11,674 6,462 3,567 21,703 1,998,215 2,019,918 Consumer 1,720 776 2,120 4,616 428,667 433,283 $ 19,670 $ 8,817 $ 13,850 $ 42,337 $ 5,500,036 $ 5,542,373 December 31, 2017 Commercial and industrial $ 2,694 $ 36 $ 503 $ 3,233 $ 184,412 $ 187,645 Commercial real estate – owner occupied 222 — 5,402 5,624 563,873 569,497 Commercial real estate – investor 135 1,426 4,507 6,068 1,180,234 1,186,302 Residential real estate 13,197 2,351 3,372 18,920 1,729,670 1,748,590 Consumer 1,067 310 1,687 3,064 279,304 282,368 $ 17,315 $ 4,123 $ 15,471 $ 36,909 $ 3,937,493 $ 3,974,402
Risk Category of Loans by Loan Portfolio Segment Excluding PCI Loans	As of September 30, 2018 and December 31, 2017 , and based on the most recent analysis performed, the risk category of loans by loan portfolio segment follows, excluding PCI loans (in thousands) is as follows: Pass Special Mention Substandard Doubtful Total September 30, 2018 Commercial and industrial $ 330,996 $ 423 $ 11,136 $ — $ 342,555 Commercial real estate – owner occupied 709,902 2,202 22,616 — 734,720 Commercial real estate – investor 1,955,483 23,180 33,234 — 2,011,897 $ 2,996,381 $ 25,805 $ 66,986 $ — $ 3,089,172 December 31, 2017 Commercial and industrial $ 181,438 $ 3,153 $ 3,054 $ — $ 187,645 Commercial real estate – owner occupied 546,569 4,337 18,591 — 569,497 Commercial real estate – investor 1,146,630 14,644 25,028 — 1,186,302 $ 1,874,637 $ 22,134 $ 46,673 $ — $ 1,943,444
Recorded Investment in Residential and Consumer Loans Based on Payment Activity Excluding PCI Loans	The following table presents the recorded investment in residential and consumer loans based on payment activity as of September 30, 2018 and December 31, 2017 , excluding PCI loans (in thousands): Residential Consumer September 30, 2018 Performing $ 2,013,528 $ 430,754 Non-performing 6,390 2,529 $ 2,019,918 $ 433,283 December 31, 2017 Performing $ 1,744,400 $ 280,439 Non-performing 4,190 1,929 $ 1,748,590 $ 282,368
Troubled Debt Restructurings	The following table presents information about troubled debt restructurings which occurred during the three and nine months ended September 30, 2018 and 2017 , and troubled debt restructurings modified within the previous year and which defaulted during the three and nine months ended September 30, 2018 and 2017 (dollars in thousands): Number of Loans Pre-modification Recorded Investment Post-modification Recorded Investment Three months ended September 30, 2018 Troubled Debt Restructurings: Commercial real estate – owner occupied 1 49 50 Commercial real estate – investor 1 171 210 Number of Loans Recorded Investment Troubled Debt Restructurings Which Subsequently Defaulted: Commercial real estate – investor 1 $ 2,820 Consumer 1 30 Number of Loans Pre-modification Post-modification Nine months ended September 30, 2018 Troubled Debt Restructurings: Commercial and industrial 2 $ 496 $ 502 Commercial real estate – owner occupied 1 49 50 Commercial real estate – investor 3 1,395 1,435 Residential real estate 2 257 270 Number of Loans Recorded Investment Troubled Debt Restructurings Which Subsequently Defaulted: Commercial real estate – investor 1 $ 2,820 Consumer 1 30 Number of Loans Pre-modification Recorded Investment Post-modification Recorded Investment Three Months Ended September 30, 2017 Troubled Debt Restructurings: Commercial real estate - owner occupied 1 $ 700 $ 700 Commercial real estate – investor 1 700 700 Residential real estate 2 328 357 Number of Loans Recorded Investment Troubled Debt Restructurings Which Subsequently Defaulted: None None Number of Loans Pre-modification Recorded Investment Post-modification Recorded Investment Nine months ended September 30, 2017 Troubled Debt Restructurings: Commercial and industrial 1 $ 665 $ 665 Commercial real estate - owner occupied 4 3,309 3,309 Commercial real estate – investor 4 6,362 6,484 Residential real estate 6 1,354 1,356 Number of Loans Recorded Investment Troubled Debt Restructurings Which Subsequently Defaulted: None None
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period	The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected and the estimated fair value of the PCI loans acquired from Sun at January 31, 2018 (in thousands): Sun January 31, 2018 Contractually required principal and interest $ 22,556 Contractual cash flows not expected to be collected (non-accretable discount) (6,115 ) Expected cash flows to be collected at acquisition 16,441 Interest component of expected cash flows (accretable yield) (3,535 ) Fair value of acquired loans $ 12,906 The following table summarizes the changes in accretable yield for PCI loans during the three and nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Beginning balance $ 2,300 $ 161 $ 1,465 $ 749 Acquisition — 2,646 — — Accretion (368 ) (1,459 ) (328 ) (642 ) Reclassification from non-accretable difference 470 1,054 13 1,043 Ending balance $ 2,402 $ 2,402 $ 1,150 $ 1,150

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
Summary of Major Types of Deposits	The major types of deposits at September 30, 2018 and December 31, 2017 were as follows (in thousands): Type of Account September 30, 2018 December 31, 2017 Non-interest-bearing $ 1,196,875 $ 756,513 Interest-bearing checking 2,332,215 1,954,358 Money market deposit 584,250 363,656 Savings 887,799 661,167 Time deposits 853,111 607,104 Total deposits $ 5,854,250 $ 4,342,798

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Financial Assets and Financial Liabilities Measured at Fair Value	The following table summarizes financial assets and financial liabilities measured at fair value as of September 30, 2018 and December 31, 2017 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands): Fair Value Measurements at Reporting Date Using: Total Fair Value Level 1 Inputs Level 2 Inputs Level 3 Inputs September 30, 2018 Items measured on a recurring basis: Debt securities available-for-sale $ 100,015 $ — $ 100,015 $ — Equity investments 9,519 9,519 — — Interest rate swap asset 557 — 557 — Interest rate swap liability 636 — 636 — Items measured on a non-recurring basis: Other real estate owned 6,231 — — 6,231 Loans measured for impairment based on the fair value of the underlying collateral 13,001 — — 13,001 December 31, 2017 Items measured on a recurring basis: Debt securities available-for-sale $ 81,581 $ — $ 81,581 $ — Equity investments 8,700 8,700 — — Items measured on a non-recurring basis: Other real estate owned 8,186 — — 8,186 Loans measured for impairment based on the fair value of the underlying collateral 16,496 — — 16,496
Book Value and Estimated Fair Value of Bank's Significant Financial Instruments Not Recorded at Fair Value	The book value and estimated fair value of the Bank’s significant financial instruments not recorded at fair value as of September 30, 2018 and December 31, 2017 are presented in the following tables (in thousands): Fair Value Measurements at Reporting Date Using: September 30, 2018 Book Value Level 1 Inputs Level 2 Inputs Level 3 Inputs Financial Assets: Cash and due from banks $ 148,362 $ 148,362 $ — $ — Debt securities held-to-maturity 883,540 — 852,348 11,825 Restricted equity investments 57,143 — — 57,143 Loans receivable, net and loans held-for-sale (1) 5,544,691 — — 5,464,517 Financial Liabilities: Deposits other than time deposits 5,001,139 — 5,001,139 — Time deposits 853,111 — 836,692 — Federal Home Loan Bank advances and other borrowings 556,279 — 559,107 — Securities sold under agreements to repurchase with retail customers 61,044 61,044 — — Fair Value Measurements at Reporting Date Using: December 31, 2017 Book Value Level 1 Inputs Level 2 Inputs Level 3 Inputs Financial Assets: Cash and due from banks $ 109,613 $ 109,613 $ — $ — Debt securities held-to-maturity 764,062 — 751,182 10,478 Restricted equity investments 19,724 — — 19,724 Loans receivable, net and loans held-for-sale (1) 3,966,014 — — 3,962,689 Financial Liabilities: Deposits other than time deposits 3,735,694 — 3,735,694 — Time deposits 607,104 — 599,677 — Federal Home Loan Bank advances and other borrowings 345,210 — 341,820 — Securities sold under agreements to repurchase with retail customers 79,668 79,668 — — (1) In accordance with the prospective adoption of ASU 2016-01, the fair value of loans was measured using the exit price notion as of September 30, 2018 . The fair value of loans was measured using the entry price notion as of December 31, 2017 .

Derivatives, Hedging Activiti_2

Derivatives, Hedging Activities, and Other Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts and Fair Value of Outstanding Derivative Positions	The table below presents the notional and fair value of derivatives not designated as hedging instruments as well as their location on the consolidated statements of financial condition as of September 30, 2018 (in thousands): September 30, 2018 Balance Sheet Location Notional Fair Value Other assets $ 59,729 $ 557 Other liabilities 59,729 636

Business Combinations - Additio

Business Combinations - Additional Information (Detail) $ in Thousands	Jan. 31, 2018USD ($)	Sep. 30, 2018Property
Sun Bancorp, Inc.
Business Acquisition [Line Items]
Purchase accounting adjustments, assets	$ 2,042,899
Purchase accounting adjustments, loans	1,517,172
Purchase accounting adjustments, deposits	1,616,073
Total consideration paid	474,930
Cash consideration	72,400
Number of properties in lease agreement | Property		21
Core Deposits
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life		10 years
Core Deposits | Sun Bancorp, Inc.
Business Acquisition [Line Items]
Core deposit intangible	$ 11,897

Business Combinations - Summary

Business Combinations - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed at Date of Acquisition (Detail) - USD ($) $ in Thousands	Jan. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Assets acquired:
Bank owned life insurance		$ 221,190	$ 134,847
Liabilities assumed:
Goodwill recorded in the merger		$ 338,104	$ 150,501
Sun Bancorp, Inc.
Business Acquisition [Line Items]
Total Purchase Price:	$ 474,930
Assets acquired:
Cash and cash equivalents	68,632
Securities	254,522
Loans	1,517,172
Accrued interest receivable	5,621
Bank owned life insurance	85,238
Deferred tax asset	57,712
Other assets	42,105
Total assets acquired	2,042,899
Liabilities assumed:
Deposits	(1,616,073)
Borrowings	(127,747)
Other liabilities	(11,752)
Total liabilities assumed	(1,755,572)
Net assets acquired	287,327
Goodwill recorded in the merger	$ 187,603

Business Combinations - Schedul

Business Combinations - Schedule of Supplemental Pro Forma Financial Information (Detail) - Sun Bancorp, Inc. - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Earnings per share, Actual:
Net interest income, Pro forma	$ 184,887	$ 181,572
Provision for loan losses, Pro forma	2,984	2,199
Non-interest income, Pro forma	26,894	29,590
Non-interest expense, Pro forma	164,538	146,154
Net income, Pro forma	$ 35,575	$ 45,027
Earnings per share, Pro forma:
Fully diluted, Pro forma (in usd per share)	$ 0.74	$ 0.93

Earnings per Share - Reconcilia

Earnings per Share - Reconciliation of Shares Outstanding for Basic and Diluted Earnings per Share (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Weighted average shares outstanding	48,337	32,545	46,913	32,456
Less: Unallocated ESOP shares	(546)	(306)	(401)	(315)
Unallocated incentive award shares and shares held by deferred compensation plan	(106)	(55)	(61)	(68)
Average basic shares outstanding	47,685	32,184	46,451	32,073
Add: Effect of dilutive securities:
Incentive awards and shares held by deferred compensation plan	887	922	952	1,037
Average diluted shares outstanding	48,572	33,106	47,403	33,110

Earnings per Share - Additional

Earnings per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Antidilutive stock options excluded from earnings per share calculations	463,000	476,000	464,000	244,000

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Securities Available-for-Sale and Held-to-Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost		$ 888,848	$ 772,060
Held-to-maturity, Estimated Fair Value	$ 864,173	761,660
Total, Amortized Cost	990,451	854,438
Total, Gross Unrealized Gains	1,897	1,967
Total, Gross Unrealized Losses	(28,160)	(13,164)
Total, Estimated Fair Value	964,188	843,241
Held-to-Maturity Securities
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	888,848	772,060
Held-to-maturity, Gross Unrealized Gains	1,897	1,967
Held-to-maturity, Gross Unrealized Losses	(26,572)	(12,367)
Held-to-maturity, Estimated Fair Value	864,173	761,660
Held-to-Maturity Securities | Debt Securities
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	214,781	240,950
Held-to-maturity, Gross Unrealized Gains	921	531
Held-to-maturity, Gross Unrealized Losses	(6,112)	(5,502)
Held-to-maturity, Estimated Fair Value	209,590	235,979
Debt Securities
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	101,603
Held-to-maturity, Gross Unrealized Gains	0
Held-to-maturity, Gross Unrealized Losses	(1,588)
Held-to-maturity, Estimated Fair Value	100,015
U.S. Agency Obligations | Held-to-Maturity Securities | Debt Securities
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	14,974	14,968
Held-to-maturity, Gross Unrealized Gains	0	0
Held-to-maturity, Gross Unrealized Losses	(192)	(65)
Held-to-maturity, Estimated Fair Value	14,782	14,903
U.S. Agency Obligations | Debt Securities
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	100,450	82,378
Held-to-maturity, Gross Unrealized Gains	0	0
Held-to-maturity, Gross Unrealized Losses	(1,577)	(797)
Held-to-maturity, Estimated Fair Value	98,873	81,581
Mortgage-Backed Securities | Held-to-Maturity Securities
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	674,067	531,110
Held-to-maturity, Gross Unrealized Gains	976	1,436
Held-to-maturity, Gross Unrealized Losses	(20,460)	(6,865)
Held-to-maturity, Estimated Fair Value	654,583	525,681
Mortgage-Backed Securities | Held-to-Maturity Securities | FHLMC
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	249,884	186,921
Held-to-maturity, Gross Unrealized Gains	45	151
Held-to-maturity, Gross Unrealized Losses	(8,126)	(2,937)
Held-to-maturity, Estimated Fair Value	241,803	184,135
Mortgage-Backed Securities | Held-to-Maturity Securities | FNMA
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	289,210	263,103
Held-to-maturity, Gross Unrealized Gains	755	1,193
Held-to-maturity, Gross Unrealized Losses	(9,382)	(3,000)
Held-to-maturity, Estimated Fair Value	280,583	261,296
Mortgage-Backed Securities | Held-to-Maturity Securities | GNMA
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	130,847	75,243
Held-to-maturity, Gross Unrealized Gains	176	64
Held-to-maturity, Gross Unrealized Losses	(2,858)	(928)
Held-to-maturity, Estimated Fair Value	128,165	74,379
Mortgage-Backed Securities | Held-to-Maturity Securities | SBA
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	4,126	5,843
Held-to-maturity, Gross Unrealized Gains	0	28
Held-to-maturity, Gross Unrealized Losses	(94)	0
Held-to-maturity, Estimated Fair Value	4,032	5,871
Mortgage-Backed Securities | Debt Securities | FNMA
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	1,153
Held-to-maturity, Gross Unrealized Gains	0
Held-to-maturity, Gross Unrealized Losses	(11)
Held-to-maturity, Estimated Fair Value	1,142
State and Municipal Obligations | Held-to-Maturity Securities | Debt Securities
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	134,988	149,958
Held-to-maturity, Gross Unrealized Gains	0	219
Held-to-maturity, Gross Unrealized Losses	(2,885)	(1,475)
Held-to-maturity, Estimated Fair Value	132,103	148,702
Corporate Debt Securities
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	44,550
Held-to-maturity, Estimated Fair Value	41,583
Corporate Debt Securities | Held-to-Maturity Securities | Debt Securities
Securities Financing Transaction [Line Items]
Held-to-maturity, Amortized Cost	64,819	76,024
Held-to-maturity, Gross Unrealized Gains	921	312
Held-to-maturity, Gross Unrealized Losses	(3,035)	(3,962)
Held-to-maturity, Estimated Fair Value	$ 62,705	$ 72,374

Securities - Additional Informa

Securities - Additional Information (Detail) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2013	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities transferred to held-to-maturity securities			$ 536,000,000
Unrealized net loss on securities transferred from available-for-sale to held-to-maturity, Gross			$ 13,300,000
Realized gains on the sale of available-for-sale securities	$ 0	$ 0		$ 248,000
Realized losses on sale of available-for-sale securities	0			0
Corporate debt securities, callable, amortized cost	53,800,000			53,800,000
Corporate debt securities, callable, estimated fair value	51,800,000			51,800,000
Securities pledged for other debt obligations, at fair value	578,500,000			578,500,000	$ 466,400,000
Reverse Repurchase Agreement
Debt Securities, Available-for-sale [Line Items]
Securities pledged for repurchase agreements, at fair value	$ 76,800,000			$ 76,800,000	58,000,000
Investment Securities | U.S. Agency Obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss					0
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, fair value					$ 0

Securities - Carrying Value of

Securities - Carrying Value of Held-to-Maturity Investment Securities (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Amortized Cost		$ 888,848	$ 772,060
Net loss on date of transfer from available-for-sale	$ (13,347)	(13,347)
Accretion of net unrealized loss on securities reclassified as held-to-maturity	8,039	5,349
Carrying value	$ 883,540	$ 764,062

Securities - Amortized Cost a_2

Securities - Amortized Cost and Estimated Fair Value of Investment Securities by Contractual Maturity (Detail) $ in Thousands	Sep. 30, 2018USD ($)
Investments, Debt and Equity Securities [Abstract]
Less than one year, Amortized Cost	$ 56,753
Due after one year through five years, Amortized Cost	156,879
Due after five years through ten years, Amortized Cost	90,804
Due after ten years, Amortized Cost	10,795
Total Amortized Cost	315,231
Less than one year, Estimated Fair Value	56,522
Due after one year through five years, Estimated Fair Value	153,904
Due after five years through ten years, Estimated Fair Value	86,373
Due after ten years, Estimated Fair Value	11,664
Total Estimated Fair Value	$ 308,463

Securities - Estimated Fair Val

Securities - Estimated Fair Value and Unrealized Loss for Securities Available-for-Sale and Held-to-Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Total securities, Less than 12 months, Estimated Fair Value	$ 429,651	$ 450,421
Total securities, Less than 12 months, Unrealized Losses	(8,820)	(3,806)
Total securities, 12 months or longer, Estimated Fair Value	431,471	261,254
Total securities, 12 months or longer, Unrealized Losses	(19,340)	(9,358)
Total securities, Estimated Fair Value	861,122	711,675
Total securities, Unrealized Losses	(28,160)	(13,164)
Held-to-Maturity Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	371,257	381,046
Held-to-maturity, Less than 12 months, Unrealized Losses	(8,134)	(3,310)
Held-to-maturity, 12 months or longer, Estimated Fair Value	389,850	249,048
Held-to-maturity, 12 months or longer, Unrealized Losses	(18,438)	(9,057)
Held-to-maturity, Total, Estimated Fair Value	761,107	630,094
Held-to-maturity, Total, Unrealized Losses	(26,572)	(12,367)
Held-to-Maturity Securities | Investment Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	67,517	123,821
Held-to-maturity, Less than 12 months, Unrealized Losses	(941)	(1,248)
Held-to-maturity, 12 months or longer, Estimated Fair Value	114,030	70,469
Held-to-maturity, 12 months or longer, Unrealized Losses	(5,171)	(4,254)
Held-to-maturity, Total, Estimated Fair Value	181,547	194,290
Held-to-maturity, Total, Unrealized Losses	(6,112)	(5,502)
Held-to-Maturity Securities | Investment Securities | Other investments
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	4,903	4,035
Held-to-maturity, Less than 12 months, Unrealized Losses	(68)	(30)
Held-to-maturity, 12 months or longer, Estimated Fair Value	41,583	56,106
Held-to-maturity, 12 months or longer, Unrealized Losses	(2,967)	(3,932)
Held-to-maturity, Total, Estimated Fair Value	46,486	60,141
Held-to-maturity, Total, Unrealized Losses	(3,035)	(3,962)
U.S. Agency Obligations | Held-to-Maturity Securities | Investment Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value		14,903
Held-to-maturity, Less than 12 months, Unrealized Losses		(65)
Held-to-maturity, 12 months or longer, Estimated Fair Value		0
Held-to-maturity, 12 months or longer, Unrealized Losses		0
Held-to-maturity, Total, Estimated Fair Value		14,903
Held-to-maturity, Total, Unrealized Losses		(65)
Mortgage-Backed Securities | Held-to-Maturity Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	303,740	257,225
Held-to-maturity, Less than 12 months, Unrealized Losses	(7,193)	(2,062)
Held-to-maturity, 12 months or longer, Estimated Fair Value	275,820	178,579
Held-to-maturity, 12 months or longer, Unrealized Losses	(13,267)	(4,803)
Held-to-maturity, Total, Estimated Fair Value	579,560	435,804
Held-to-maturity, Total, Unrealized Losses	(20,460)	(6,865)
Mortgage-Backed Securities | Held-to-Maturity Securities | FHLMC
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	125,973	98,138
Held-to-maturity, Less than 12 months, Unrealized Losses	(2,463)	(781)
Held-to-maturity, 12 months or longer, Estimated Fair Value	112,290	68,238
Held-to-maturity, 12 months or longer, Unrealized Losses	(5,663)	(2,156)
Held-to-maturity, Total, Estimated Fair Value	238,263	166,376
Held-to-maturity, Total, Unrealized Losses	(8,126)	(2,937)
Mortgage-Backed Securities | Held-to-Maturity Securities | FNMA
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	120,922	132,982
Held-to-maturity, Less than 12 months, Unrealized Losses	(3,594)	(1,058)
Held-to-maturity, 12 months or longer, Estimated Fair Value	112,293	65,060
Held-to-maturity, 12 months or longer, Unrealized Losses	(5,788)	(1,942)
Held-to-maturity, Total, Estimated Fair Value	233,215	198,042
Held-to-maturity, Total, Unrealized Losses	(9,382)	(3,000)
Mortgage-Backed Securities | Held-to-Maturity Securities | GNMA
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	52,813	26,105
Held-to-maturity, Less than 12 months, Unrealized Losses	(1,042)	(223)
Held-to-maturity, 12 months or longer, Estimated Fair Value	51,237	45,281
Held-to-maturity, 12 months or longer, Unrealized Losses	(1,816)	(705)
Held-to-maturity, Total, Estimated Fair Value	104,050	71,386
Held-to-maturity, Total, Unrealized Losses	(2,858)	(928)
Mortgage-Backed Securities | Held-to-Maturity Securities | SBA
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	4,032
Held-to-maturity, Less than 12 months, Unrealized Losses	(94)
Held-to-maturity, 12 months or longer, Estimated Fair Value	0
Held-to-maturity, 12 months or longer, Unrealized Losses	0
Held-to-maturity, Total, Estimated Fair Value	4,032
Held-to-maturity, Total, Unrealized Losses	(94)	0
State and Municipal Obligations | Held-to-Maturity Securities | Investment Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	9,835
Held-to-maturity, Less than 12 months, Unrealized Losses	(129)
Held-to-maturity, 12 months or longer, Estimated Fair Value	4,947
Held-to-maturity, 12 months or longer, Unrealized Losses	(63)
Held-to-maturity, Total, Estimated Fair Value	14,782
Held-to-maturity, Total, Unrealized Losses	(192)
Corporate Debt Securities | Held-to-Maturity Securities | Investment Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	52,779	104,883
Held-to-maturity, Less than 12 months, Unrealized Losses	(744)	(1,153)
Held-to-maturity, 12 months or longer, Estimated Fair Value	67,500	14,363
Held-to-maturity, 12 months or longer, Unrealized Losses	(2,141)	(322)
Held-to-maturity, Total, Estimated Fair Value	120,279	119,246
Held-to-maturity, Total, Unrealized Losses	(2,885)	(1,475)
Investment Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	58,394
Held-to-maturity, Less than 12 months, Unrealized Losses	(686)
Held-to-maturity, 12 months or longer, Estimated Fair Value	41,621
Held-to-maturity, 12 months or longer, Unrealized Losses	(902)
Held-to-maturity, Total, Estimated Fair Value	100,015
Held-to-maturity, Total, Unrealized Losses	(1,588)
Investment Securities | U.S. Agency Obligations
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	57,252	69,375
Held-to-maturity, Less than 12 months, Unrealized Losses	(675)	(496)
Held-to-maturity, 12 months or longer, Estimated Fair Value	41,621	12,206
Held-to-maturity, 12 months or longer, Unrealized Losses	(902)	(301)
Held-to-maturity, Total, Estimated Fair Value	98,873	81,581
Held-to-maturity, Total, Unrealized Losses	(1,577)	$ (797)
Investment Securities | Mortgage-Backed Securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	1,142
Held-to-maturity, Less than 12 months, Unrealized Losses	(11)
Held-to-maturity, 12 months or longer, Estimated Fair Value	0
Held-to-maturity, 12 months or longer, Unrealized Losses	0
Held-to-maturity, Total, Estimated Fair Value	1,142
Held-to-maturity, Total, Unrealized Losses	$ (11)

Securities - Amortized Cost, Es

Securities - Amortized Cost, Estimated Fair Value and Credit Rating of Corporate Debt Securities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		$ 888,848	$ 772,060
Held-to-maturity, Estimated Fair Value	$ 864,173	$ 761,660
Chase Capital
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	10,000
Held-to-maturity, Estimated Fair Value	$ 9,350
Credit Rating Moody’s/ S&P	Baa2/BBB-
Wells Fargo Capital
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 5,000
Held-to-maturity, Estimated Fair Value	$ 4,650
Credit Rating Moody’s/ S&P	A1/BBB
Huntington Capital
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 5,000
Held-to-maturity, Estimated Fair Value	$ 4,525
Credit Rating Moody’s/ S&P	Baa2/BB+
Keycorp Capital
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 5,000
Held-to-maturity, Estimated Fair Value	$ 4,600
Credit Rating Moody’s/ S&P	Baa2/BB+
PNC Capital
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 5,000
Held-to-maturity, Estimated Fair Value	$ 4,678
Credit Rating Moody’s/ S&P	Baa1/BBB-
State Street Capital
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 5,000
Held-to-maturity, Estimated Fair Value	$ 4,700
Credit Rating Moody’s/ S&P	A3/BBB
SunTrust Capital
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 5,000
Held-to-maturity, Estimated Fair Value	$ 4,625
Credit Rating Moody’s/ S&P	Not Rated/BB+
Southern Company
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,516
Held-to-maturity, Estimated Fair Value	$ 1,485
Credit Rating Moody’s/ S&P	Baa2/BBB+
AT&T Inc.
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,510
Held-to-maturity, Estimated Fair Value	$ 1,480
Credit Rating Moody’s/ S&P	Baa2/BBB
Celgene
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,524
Held-to-maturity, Estimated Fair Value	$ 1,490
Credit Rating Moody’s/ S&P	Baa2/BBB+
Corporate Debt Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 44,550
Held-to-maturity, Estimated Fair Value	$ 41,583

Loans Receivable, Net - Compone

Loans Receivable, Net - Components of Loans Receivable, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 5,542,373		$ 3,974,402
Purchased credit impaired ("PCI") loans	9,700		1,712
Total Loans	5,552,073		3,976,114
Deferred origination costs, net	8,707		5,380
Allowance for loan losses	(16,821)	$ (16,691)	(15,721)	$ (16,584)	$ (16,557)	$ (15,183)
Total loans, net	5,543,959		3,965,773
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3,089,172		1,943,444
Commercial | Commercial And Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	342,555		187,645
Commercial | Commercial Real Estate - Owner Occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	734,720		569,497
Commercial | Commercial Real Estate - Investor
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,011,897		1,186,302
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,453,201		2,030,958
Allowance for loan losses	(530)	$ (526)	(614)	$ (758)	$ (930)	$ (1,110)
Consumer | Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,019,918		1,748,590
Consumer | Home Equity Loans and Lines
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	358,728		281,143
Consumer | Other Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 74,555		$ 1,225

Loans Receivable, Net - Additio

Loans Receivable, Net - Additional Information (Detail)	May 02, 2016USD ($)	Sep. 30, 2018USD ($)SecurityLoan	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)SecurityLoan	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans with non-accrual of interest		$ 19,239,000		$ 19,239,000		$ 20,865,000
Number of residential mortgage loans | SecurityLoan		0		0
Impaired loans on non-accrual commercial real estate, multi-family, land, construction, commercial and industrial loans				$ 250,000
Impaired loan portfolio total		$ 33,088,000		33,088,000		46,988,000
Allocation in allowance for loan losses		0		0		0
Average balance of impaired loans		32,900,000	$ 43,100,000	39,200,000	$ 38,000,000
Troubled debt restructured loans		27,800,000		27,800,000		42,100,000
Troubled debt restructured loans with accrual interest		24,200,000		24,200,000		33,300,000
Non-accrual loan total troubled debt restructurings				3,568,000		8,800,000
Specific reserves to loans accruing troubled debt restructurings		0		0
Sun Bancorp, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses, loans acquired	$ 0
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans with non-accrual of interest		6,390,000		6,390,000		$ 4,190,000
Recorded investment in mortgage and consumer loans collateralized, foreclosure amount		2,100,000		2,100,000
Foreclosed property held		$ 447,000		$ 447,000

Loans Receivable, Net - Analysi

Loans Receivable, Net - Analysis of Allowance for Loan Losses (Detail) - 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 [Roll Forward]
Balance at beginning of period	$ 16,691	$ 16,557	$ 15,721	$ 15,183
Provision charged to operations	907	1,165	2,984	3,030
Charge-offs	(891)	(1,357)	(2,708)	(2,861)
Recoveries	114	219	824	1,232
Balance at end of period	$ 16,821	$ 16,584	$ 16,821	$ 16,584

Loans Receivable, Net - Allowan

Loans Receivable, Net - Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method Excluding PCI Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Allowance for loan losses:
Balance at beginning of period	$ 16,691	$ 16,557	$ 15,721	$ 15,183
Provision (benefit) charged to operations	907	1,165	2,984	3,030
Charge-offs	(891)	(1,357)	(2,708)	(2,861)
Recoveries	114	219	824	1,232
Balance at end of period	16,821	16,584	16,821	16,584
Ending allowance balance attributed to loans:
Individually evaluated for impairment	0		0		$ 0
Collectively evaluated for impairment	16,821		16,821		15,721
Total ending allowance balance	16,821		16,821		15,721
Loans:
Loans individually evaluated for impairment	33,088		33,088		46,988
Loans collectively evaluated for impairment	5,509,285		5,509,285		3,927,414
Total loans	5,542,373		5,542,373		3,974,402
Commercial and Industrial
Allowance for loan losses:
Balance at beginning of period	2,080	2,253	1,801	2,037
Provision (benefit) charged to operations	(520)	(180)	(238)	(221)
Charge-offs	(146)	(6)	(202)	(94)
Recoveries	28	50	81	395
Balance at end of period	1,442	2,117	1,442	2,117
Ending allowance balance attributed to loans:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	1,442		1,442		1,801
Total ending allowance balance	1,442		1,442		1,801
Loans:
Loans individually evaluated for impairment	1,738		1,738		864
Loans collectively evaluated for impairment	340,817		340,817		186,781
Total loans	342,555		342,555		187,645
Commercial Real Estate - Owner Occupied
Allowance for loan losses:
Balance at beginning of period	2,340	3,097	3,175	2,999
Provision (benefit) charged to operations	187	119	(734)	167
Charge-offs	0	0	(91)	(73)
Recoveries	1	0	178	123
Balance at end of period	2,528	3,216	2,528	3,216
Ending allowance balance attributed to loans:
Collectively evaluated for impairment	2,528		2,528		3,175
Total ending allowance balance	2,528		2,528		3,175
Loans:
Loans individually evaluated for impairment	5,446		5,446		15,132
Loans collectively evaluated for impairment	729,274		729,274		554,365
Total loans	734,720		734,720		569,497
Commercial Real Estate - Investor
Allowance for loan losses:
Balance at beginning of period	9,058	8,367	7,952	6,361
Provision (benefit) charged to operations	661	81	2,706	2,164
Charge-offs	(138)	0	(1,239)	(84)
Recoveries	9	24	171	31
Balance at end of period	9,590	8,472	9,590	8,472
Ending allowance balance attributed to loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	9,590		9,590		7,952
Total ending allowance balance	9,590		9,590		7,952
Loans:
Loans individually evaluated for impairment	12,760		12,760		17,923
Loans collectively evaluated for impairment	1,999,137		1,999,137		1,168,379
Total loans	2,011,897		2,011,897		1,186,302
Residential Real Estate
Allowance for loan losses:
Balance at beginning of period	2,126	1,492	1,804	2,245
Provision (benefit) charged to operations	578	1,465	1,079	1,477
Charge-offs	(535)	(1,284)	(936)	(2,485)
Recoveries	57	128	279	564
Balance at end of period	2,226	1,801	2,226	1,801
Ending allowance balance attributed to loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	2,226		2,226		1,804
Total ending allowance balance	2,226		2,226		1,804
Loans:
Loans individually evaluated for impairment	10,454		10,454		10,605
Loans collectively evaluated for impairment	2,009,464		2,009,464		1,737,985
Total loans	2,019,918		2,019,918		1,748,590
Consumer
Allowance for loan losses:
Balance at beginning of period	526	930	614	1,110
Provision (benefit) charged to operations	57	(122)	41	(346)
Charge-offs	(72)	(67)	(240)	(125)
Recoveries	19	17	115	119
Balance at end of period	530	758	530	758
Ending allowance balance attributed to loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	530		530		614
Total ending allowance balance	530		530		614
Loans:
Loans individually evaluated for impairment	2,690		2,690		2,464
Loans collectively evaluated for impairment	430,593		430,593		279,904
Total loans	433,283		433,283		282,368
Unallocated
Allowance for loan losses:
Balance at beginning of period	561	418	375	431
Provision (benefit) charged to operations	(56)	(198)	130	(211)
Balance at end of period	505	$ 220	505	$ 220
Ending allowance balance attributed to loans:
Collectively evaluated for impairment	505		505		375
Total ending allowance balance	505		505		375
Loans:
Total loans	$ 0		$ 0		$ 0

Loans Receivable, Net - Summary

Loans Receivable, Net - Summary of Impaired Loans Excluding PCI Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Impaired loans with no allocated allowance for loan losses	$ 33,088	$ 46,988
Impaired loans with allocated allowance for loan losses	0	0
Total	33,088	46,988
Amount of the allowance for loan losses allocated	$ 0	$ 0

Loans Receivable, Net - Summa_2

Loans Receivable, Net - Summary of Loans Individually Evaluated for Impairment by Loan Portfolio Segment Excluding PCI Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 33,088		$ 33,088		$ 46,988
Allowance for Loan Losses Allocated	0		0		0
With No Related Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	36,410		36,410		50,076
Recorded Investment	33,088		33,088		46,988
Average Recorded Investment	32,180	$ 38,558	37,645	$ 31,595
Interest Income Recognized	398	765	1,087	1,564
With an Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0		0		0
Recorded Investment	0		0		0
Allowance for Loan Losses Allocated	0		0		0
Average Recorded Investment	736	4,551	1,574	6,362
Interest Income Recognized	0	13	0	149
Commercial and Industrial | With No Related Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,824		1,824		895
Recorded Investment	1,738		1,738		864
Average Recorded Investment	982	908	906	588
Interest Income Recognized	69	26	85	50
Commercial and Industrial | With an Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0		0		0
Recorded Investment	0		0		0
Allowance for Loan Losses Allocated	0		0		0
Average Recorded Investment	736	0	736	0
Interest Income Recognized	0	0	0	0
Commercial Real Estate - Owner Occupied | With No Related Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	5,459		5,459		15,832
Recorded Investment	5,446		5,446		15,132
Average Recorded Investment	5,484	11,217	8,978	11,080
Interest Income Recognized	75	335	226	520
Commercial Real Estate - Owner Occupied | With an Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance					0
Recorded Investment					0
Allowance for Loan Losses Allocated					0
Average Recorded Investment	0	0	0	0
Interest Income Recognized		0		0
Commercial Real Estate - Investor | With No Related Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	15,290		15,290		19,457
Recorded Investment	12,760		12,760		17,923
Average Recorded Investment	12,191	11,147	14,259	6,550
Interest Income Recognized	102	240	304	487
Commercial Real Estate - Investor | With an Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0		0		0
Recorded Investment	0		0		0
Allowance for Loan Losses Allocated	0		0		0
Average Recorded Investment	0	4,551	838	4,233
Interest Income Recognized	0	13	0	81
Residential Real Estate | With No Related Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	10,828		10,828		10,951
Recorded Investment	10,454		10,454		10,605
Average Recorded Investment	10,741	12,791	10,873	11,009
Interest Income Recognized	119	128	356	401
Residential Real Estate | With an Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0		0		0
Recorded Investment	0		0		0
Allowance for Loan Losses Allocated	0		0		0
Average Recorded Investment	0	0	0	1,981
Interest Income Recognized	0	0	0	62
Consumer | With No Related Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	3,009		3,009		2,941
Recorded Investment	2,690		2,690		2,464
Average Recorded Investment	2,782	2,495	2,629	2,368
Interest Income Recognized	33	36	116	106
Consumer | With an Allowance Recorded
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0		0		0
Recorded Investment	0		0		0
Allowance for Loan Losses Allocated	0		0		$ 0
Average Recorded Investment	0	0	0	148
Interest Income Recognized	$ 0	$ 0	$ 0	$ 6

Loans Receivable, Net - Recorde

Loans Receivable, Net - Recorded Investment in Non-Accrual Loans by Loan Portfolio Segment Excluding PCI Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment in Non-accrual Loans	$ 19,239	$ 20,865
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment in Non-accrual Loans	1,727	503
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment in Non-accrual Loans	511	5,962
Commercial Real Estate - Investor
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment in Non-accrual Loans	8,082	8,281
Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment in Non-accrual Loans	6,390	4,190
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment in Non-accrual Loans	$ 2,529	$ 1,929

Loans Receivable, Net - Aging o

Loans Receivable, Net - Aging of Recorded Investment in Past Due Loans Excluding PCI Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 42,337	$ 36,909
Greater than 90 Days Past Due	13,850	15,471
Loans Not Past Due	5,500,036	3,937,493
Total loans	5,542,373	3,974,402
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	19,670	17,315
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,817	4,123
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,506	5,624
Greater than 90 Days Past Due	197	5,402
Loans Not Past Due	730,214	563,873
Total loans	734,720	569,497
Commercial Real Estate - Owner Occupied | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,433	222
Commercial Real Estate - Owner Occupied | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	876	0
Commercial Real Estate - Investor
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,392	6,068
Greater than 90 Days Past Due	7,938	4,507
Loans Not Past Due	2,000,505	1,180,234
Total loans	2,011,897	1,186,302
Commercial Real Estate - Investor | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,788	135
Commercial Real Estate - Investor | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	666	1,426
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,616	3,064
Greater than 90 Days Past Due	2,120	1,687
Loans Not Past Due	428,667	279,304
Total loans	433,283	282,368
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,720	1,067
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	776	310
Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	21,703	18,920
Greater than 90 Days Past Due	3,567	3,372
Loans Not Past Due	1,998,215	1,729,670
Total loans	2,019,918	1,748,590
Residential Real Estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,674	13,197
Residential Real Estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,462	2,351
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	120	3,233
Greater than 90 Days Past Due	28	503
Loans Not Past Due	342,435	184,412
Total loans	342,555	187,645
Commercial and Industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	55	2,694
Commercial and Industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 37	$ 36

Loans Receivable, Net - Risk Ca

Loans Receivable, Net - Risk Category of Loans by Loan Portfolio Segment Excluding PCI Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loan	$ 3,089,172	$ 1,943,444
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loan	342,555	187,645
Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loan	734,720	569,497
Commercial Real Estate - Investor
Financing Receivable, Recorded Investment [Line Items]
Loan	2,011,897	1,186,302
Pass
Financing Receivable, Recorded Investment [Line Items]
Loan	2,996,381	1,874,637
Pass | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loan	330,996	181,438
Pass | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loan	709,902	546,569
Pass | Commercial Real Estate - Investor
Financing Receivable, Recorded Investment [Line Items]
Loan	1,955,483	1,146,630
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loan	25,805	22,134
Special Mention | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loan	423	3,153
Special Mention | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loan	2,202	4,337
Special Mention | Commercial Real Estate - Investor
Financing Receivable, Recorded Investment [Line Items]
Loan	23,180	14,644
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loan	66,986	46,673
Substandard | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loan	11,136	3,054
Substandard | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loan	22,616	18,591
Substandard | Commercial Real Estate - Investor
Financing Receivable, Recorded Investment [Line Items]
Loan	33,234	25,028
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loan	0	0
Doubtful | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loan	0	0
Doubtful | Commercial Real Estate - Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Loan	0	0
Doubtful | Commercial Real Estate - Investor
Financing Receivable, Recorded Investment [Line Items]
Loan	$ 0	$ 0

Loans Receivable, Net - Recor_2

Loans Receivable, Net - Recorded Investment in Residential and Consumer Loans Based on Payment Activity Excluding PCI Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Non-performing	$ 19,239	$ 20,865
Total loans	5,542,373	3,974,402
Residential Real Estate
Financing Receivable, Recorded Investment [Line Items]
Non-performing	6,390	4,190
Total loans	2,019,918	1,748,590
Consumer
Financing Receivable, Recorded Investment [Line Items]
Non-performing	2,529	1,929
Total loans	433,283	282,368
Residential Real Estate | Residential Real Estate
Financing Receivable, Recorded Investment [Line Items]
Performing	2,013,528	1,744,400
Non-performing	6,390	4,190
Total loans	2,019,918	1,748,590
Residential Real Estate | Consumer
Financing Receivable, Recorded Investment [Line Items]
Performing	430,754	280,439
Non-performing	2,529	1,929
Total loans	$ 433,283	$ 282,368

Loans Receivable, Net - Trouble

Loans Receivable, Net - Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)SecurityLoan	Sep. 30, 2017USD ($)SecurityLoan	Sep. 30, 2018USD ($)SecurityLoan	Sep. 30, 2017USD ($)SecurityLoan
Residential real estate
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan			2	1
Pre-modification Recorded Investment			$ 496
Post-modification Recorded Investment			$ 502
Recorded Investment				$ 665
Commercial Real Estate - Owner Occupied
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1	1	1	4
Pre-modification Recorded Investment	$ 49	$ 700	$ 49	$ 3,309
Post-modification Recorded Investment	$ 50	$ 700	$ 50	$ 3,309
Commercial Real Estate - Investor
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1	1	3	4
Pre-modification Recorded Investment	$ 171	$ 700	$ 1,395	$ 6,362
Post-modification Recorded Investment	$ 210	$ 700	$ 1,435	$ 6,484
Residential Real Estate
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan		2	2	6
Pre-modification Recorded Investment		$ 328	$ 257	$ 1,354
Post-modification Recorded Investment		$ 357	$ 270	$ 1,356
Commercial Real Estate - Investor, Subsequently Defaulted [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0		1
Recorded Investment	$ 2,820		$ 2,820
Consumer, Subsequently Defaulted
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	0		1
Recorded Investment	$ 30		$ 30
Subsequently Defaulted
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan		0		0
Recorded Investment		$ 0		$ 0

Loans Receivable, Net - PCI Loa

Loans Receivable, Net - PCI Loans Acquired (Detail) - Sun Bancorp, Inc. $ in Thousands	Jan. 31, 2018USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest	$ 22,556
Contractual cash flows not expected to be collected (non-accretable discount)	(6,115)
Expected cash flows to be collected at acquisition	16,441
Interest component of expected cash flows (accretable yield)	(3,535)
Fair value of acquired loans	$ 12,906

Loans Receivable, Net - Summa_3

Loans Receivable, Net - Summary of Changes in Accretable Yield (Detail) - 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 [Roll Forward]
Beginning balance	$ 2,300	$ 1,465	$ 161	$ 749
Acquisition	0	0	2,646	0
Accretion	(368)	(328)	(1,459)	(642)
Reclassification from non-accretable difference	470	13	1,054	1,043
Ending balance	$ 2,402	$ 1,150	$ 2,402	$ 1,150

Deposits - Summary of Major Typ

Deposits - Summary of Major Types of Deposits (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Non-interest-bearing	$ 1,196,875	$ 756,513
Interest-bearing checking	2,332,215	1,954,358
Money market deposit	584,250	363,656
Savings	887,799	661,167
Time deposits	853,111	607,104
Total deposits	$ 5,854,250	$ 4,342,798

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Time deposits, $100,000 and over	$ 119.4	$ 84.9

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements - Narrative (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 286,462		$ 271,023
Other comprehensive income, net of tax		$ 1,259	$ 600
Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other comprehensive income, net of tax	$ 147

Fair Value Measurements - Finan

Fair Value Measurements - Financial Assets and Financial Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Items Measured on a Recurring Basis | U.S. Agency Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 100,015	$ 81,581
Items Measured on a Recurring Basis | Equity investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	9,519	8,700
Items Measured on a Recurring Basis | Interest rate swap asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	557
Items Measured on a Recurring Basis | Interest rate swap liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	636
Items Measured on a Recurring Basis | Level 1 Inputs | Equity investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	9,519	8,700
Items Measured on a Recurring Basis | Level 2 Inputs | U.S. Agency Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	100,015	81,581
Items Measured on a Recurring Basis | Level 2 Inputs | Interest rate swap asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	557
Items Measured on a Recurring Basis | Level 2 Inputs | Interest rate swap liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	636
Items Measured on a Non-Recurring Basis | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	6,231	8,186
Items Measured on a Non-Recurring Basis | Loans measured for impairment based on the fair value of the underlying collateral
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	13,001	16,496
Items Measured on a Non-Recurring Basis | Level 3 Inputs | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	6,231	8,186
Items Measured on a Non-Recurring Basis | Level 3 Inputs | Loans measured for impairment based on the fair value of the underlying collateral
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 13,001	$ 16,496

Fair Value Measurements - Book

Fair Value Measurements - Book Value and Estimated Fair Value of Bank's Significant Financial Instruments Not Recorded at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial Assets:
Securities held-to-maturity, net estimated fair value	$ 864,173	$ 761,660
Restricted equity investments, at cost	57,143	19,724
Financial Liabilities:
Time deposits	853,111	607,104
Securities sold under agreements to repurchase with retail customers	61,044	79,668
Book Value
Financial Assets:
Cash and due from banks	148,362	109,613
Securities held-to-maturity, net estimated fair value	883,540	764,062
Restricted equity investments, at cost	57,143	19,724
Loans receivable, net and mortgage loans held for sale	5,544,691	3,966,014
Financial Liabilities:
Deposits other than time deposits	5,001,139	3,735,694
Time deposits	853,111	607,104
Federal Home Loan Bank advances and other borrowings	556,279	345,210
Securities sold under agreements to repurchase with retail customers	61,044	79,668
Level 1 Inputs
Financial Assets:
Cash and due from banks	148,362	109,613
Financial Liabilities:
Securities sold under agreements to repurchase with retail customers	61,044	79,668
Level 2 Inputs
Financial Assets:
Securities held-to-maturity, net estimated fair value	852,348	751,182
Financial Liabilities:
Deposits other than time deposits	5,001,139	3,735,694
Time deposits	836,692	599,677
Federal Home Loan Bank advances and other borrowings	559,107	341,820
Level 3 Inputs
Financial Assets:
Securities held-to-maturity, net estimated fair value	11,825	10,478
Restricted equity investments, fair value	57,143	19,724
Loans receivable, net and mortgage loans held for sale	$ 5,464,517	$ 3,962,689

Derivatives, Hedging Activiti_3

Derivatives, Hedging Activities, and Other Financial Instruments - Narrative (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2018USD ($)
Derivative [Line Items]
Collateral already posted, fair value	$ 3,300	$ 3,300
Derivative liability	636	636
Interest Rate Swap
Derivative [Line Items]
Income (expense) in fair value adjustments	$ (78)	$ (76)

Derivatives, Hedging Activiti_4

Derivatives, Hedging Activities, and Other Financial Instruments - Notional and Fair Value of Derivatives Assets and Liabilities (Details) $ in Thousands	Sep. 30, 2018USD ($)
Other assets
Derivative [Line Items]
Derivative asset, notional amount	$ 59,729
Credit risk derivative asset, fair value	557
Other liabilities
Derivative [Line Items]
Derivative liability, notional amount	59,729
Credit risk derivative liability, fair value	$ 636