Sterling Bancorp (STL) 10-Q 28 Apr 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 25, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	STERLING BANCORP
Entity Central Index Key	1,070,154
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		135,590,862

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
ASSETS:
Cash and due from banks	$ 253,703	$ 293,646
Securities:
Available for sale, at fair value	1,941,671	1,727,417
Held to maturity, at amortized cost (fair value of $1,447,317 and $1,357,997 at March 31, 2017 and December 31, 2016, respectively)	1,474,724	1,391,421
Total securities	3,416,395	3,118,838
Loans held for sale	2,559	41,889
Portfolio loans	9,763,967	9,527,230
Allowance for loan losses	(66,939)	(63,622)
Portfolio loans, net	9,697,028	9,463,608
Federal Home Loan Bank (“FHLB”) and Federal Reserve Bank (“FRB”) stock, at cost	148,030	135,098
Accrued interest receivable	48,974	43,319
Premises and equipment, net	57,567	57,318
Goodwill	696,600	696,600
Other intangible assets, net	64,098	66,353
Bank owned life insurance	201,259	199,889
Other real estate owned	9,632	13,619
Other assets	63,492	48,270
Total assets	14,659,337	14,178,447
LIABILITIES:
Deposits	10,251,725	10,068,259
FHLB borrowings	2,035,000	1,791,000
Other borrowings	44,472	16,642
Senior Notes	76,551	76,469
Subordinated Notes	172,553	172,501
Mortgage escrow funds	13,153	13,572
Other liabilities	177,270	184,821
Total liabilities	12,770,724	12,323,264
Commitments and Contingent liabilities	0	0
STOCKHOLDERS’ EQUITY:
Preferred stock (par value $0.01 per share; 10,000,000 shares authorized; none issued or outstanding)	0	0
Common stock (par value $0.01 per share; 190,000,000 shares authorized; 141,043,149 shares issued at March 31, 2017 and December 31, 2016; 135,604,435 and 135,257,570 shares outstanding at March 31, 2017 and December 31, 2016, respectively)	1,411	1,411
Additional paid-in capital	1,590,293	1,597,287
Treasury stock, at cost (5,438,714 shares at March 31, 2017 and 5,785,579 at December 31, 2016)	(62,046)	(66,188)
Retained earnings	382,676	349,308
Accumulated other comprehensive (loss), net of tax (benefit) of $(15,487) at March 31, 2017 and $(17,390) at December 31, 2016	(23,721)	(26,635)
Total stockholders’ equity	1,888,613	1,855,183
Total liabilities and stockholders’ equity	$ 14,659,337	$ 14,178,447

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Securities held to maturity	$ 1,447,317	$ 1,357,997
Preferred stock, par value (USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	190,000,000	190,000,000
Common stock, shares issued	141,043,149	141,043,149
Common stock, shares outstanding	135,604,435	135,257,570
Treasury stock, shares	5,438,714	5,785,579
Accumulated other comprehensive income, tax	$ 15,487	$ 17,390

Consolidated Income Statements

Consolidated Income Statements (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest and dividend income:
Loans and loan fees	$ 104,570	$ 89,034
Securities taxable	12,282	12,016
Securities non-taxable	7,618	3,879
Other earning assets	1,530	1,077
Total interest and dividend income	126,000	106,006
Interest expense:
Deposits	9,508	6,409
Borrowings	7,702	6,087
Total interest expense	17,210	12,496
Net interest income	108,790	93,510
Provisions for loan losses	4,500	4,000
Net interest income after provision for loan losses	104,290	89,510
Non-interest income:
Accounts receivable management / factoring commissions and other fees	3,769	4,494
Mortgage banking income	271	2,002
Deposit fees and service charges	3,335	4,496
Net (loss) on sale of securities	(23)	(283)
Bank owned life insurance	1,370	1,327
Investment management fees	231	1,124
Other	3,883	2,270
Total non-interest income	12,836	15,430
Non-interest expense:
Compensation and benefits	31,391	30,020
Stock-based compensation plans	1,736	1,540
Occupancy and office operations	8,134	9,282
Amortization of intangible assets	2,229	3,053
FDIC insurance and regulatory assessments	1,888	2,258
Other real estate owned expense, net	1,676	582
Merger-related expense	3,127	265
Charge for asset write-downs, retention and severance	0	2,485
Loss on extinguishment of borrowings	0	8,716
Other	10,169	10,730
Total non-interest expense	60,350	68,931
Income before income tax expense	56,776	36,009
Income tax expense	17,709	12,243
Net income	$ 39,067	$ 23,766
Weighted average common shares:
Basic (in shares)	135,163,347	129,974,025
Diluted (in shares)	135,811,721	130,500,975
Earnings per common share:
Basic (USD per share)	$ 0.29	$ 0.18
Diluted (USD per share)	$ 0.29	$ 0.18

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 39,067	$ 23,766
Other comprehensive income, before tax:
Change in unrealized holding gains on securities available for sale	4,495	26,352
Accretion of net unrealized loss on securities transferred to held to maturity	243	(74)
Reclassification adjustment for net realized losses included in net income	23	283
Change in the actuarial loss of defined benefit plan and post-retirement benefit plans	56	354
Total other comprehensive income, before tax	4,817	26,915
Deferred tax (expense) related to other comprehensive income	(1,903)	(10,632)
Other comprehensive income, net of tax	2,914	16,283
Comprehensive income	$ 41,981	$ 40,049

Consolidated Statement of Chang

Consolidated Statement of Changes In Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Treasury stock	Retained earnings	Accumulated other comprehensive (loss) income
Balance at Dec. 31, 2015	$ 1,665,073	$ 1,367	$ 1,506,612	$ (76,190)	$ 245,408	$ (12,124)
Balance, shares at Dec. 31, 2015		130,006,926
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	23,766				23,766
Other comprehensive income	16,283					16,283
Stock option & other stock transactions, net	861		202	807	(148)
Stock option & other stock transactions, net, shares		74,797
Restricted stock awards, net	1,225		(5,397)	5,241	1,381
Restricted stock awards, net, shares		467,266
Cash dividends declared	(9,075)				(9,075)
Balance at Mar. 31, 2016	1,698,133	$ 1,367	1,501,417	(70,142)	261,332	4,159
Balance, shares at Mar. 31, 2016		130,548,989
Balance at Dec. 31, 2016	1,855,183	$ 1,411	1,597,287	(66,188)	349,308	(26,635)
Balance, shares at Dec. 31, 2016		135,257,570
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	39,067				39,067
Other comprehensive income	2,914					2,914
Stock option & other stock transactions, net	493		49	553	(109)
Stock option & other stock transactions, net, shares		40,253
Restricted stock awards, net	392		(7,043)	3,589	3,846
Restricted stock awards, net, shares		306,612
Cash dividends declared	(9,436)				(9,436)
Balance at Mar. 31, 2017	$ 1,888,613	$ 1,411	$ 1,590,293	$ (62,046)	$ 382,676	$ (23,721)
Balance, shares at Mar. 31, 2017		135,604,435

Consolidated Statement of Chan7

Consolidated Statement of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Stockholders' Equity [Abstract]
Cash dividends paid (USD per share)	$ 0.07	$ 0.07

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 39,067	$ 23,766
Adjustments to reconcile net income to net cash provided by operating activities:
Provisions for loan losses	4,500	4,000
Net loss from write-downs and sales of other real estate owned	1,293	153
Loss on extinguishment of borrowings	0	8,716
Depreciation of premises and equipment	2,014	2,102
Asset write-downs, severance and retention compensation and other restructuring charges	0	2,485
Amortization of intangible assets	2,229	3,053
Amortization of low income housing tax credits	138	48
Net loss on sale of securities	23	283
Net gain on loans held for sale	(701)	(2,002)
Net amortization of premiums on securities	5,545	3,328
Net accretion of purchase discount and amortization of net deferred loan costs	(3,482)	(5,084)
Net accretion of debt issuance costs and amortization of premium on borrowings	134	97
Restricted stock compensation expense	1,686	1,414
Stock option compensation expense	50	126
Originations of loans held for sale	(5,159)	(102,165)
Proceeds from sales of loans held for sale	45,190	111,040
Increase in cash surrender value of bank owned life insurance	(1,370)	(1,327)
Deferred income tax (benefit) expense	(890)	6,214
Other adjustments (principally net changes in other assets and other liabilities)	(28,398)	(50,113)
Net cash provided by (used in) operating activities	61,869	(2,582)
Cash flows from investing activities:
Available for sale	(282,437)	(269,220)
Held to maturity	(100,799)	(242,428)
Proceeds from maturities, calls and other principal payments on securities:
Available for sale	70,273	44,908
Held to maturity	14,124	11,090
Proceeds from sales of securities available for sale	232	275,358
Portfolio loan originations, net	(169,183)	(121,428)
Portfolio loans purchased	(94,912)	0
Proceeds from sale of loans held for investment	28,990	19,054
Purchase of FHLB and FRB stock, net	(12,932)	(1,572)
Proceeds from sales of other real estate owned	3,361	376
Purchases of premises and equipment	(2,263)	(996)
Purchase low income housing tax credit	(2,200)	0
Cash paid for acquisition, net	0	(346,690)
Net cash (used in) investing activities	(547,746)	(631,548)
Cash flows from financing activities:
Net increase in transaction, savings and money market deposits	220,658	689,379
Net (decrease) increase in certificates of deposit	(37,192)	59,236
Net (decrease) increase in short-term FHLB borrowings	(256,000)	205,000
Advances of term FHLB borrowings	625,000	325,000
Repayments of term FHLB borrowings	(125,000)	(495,062)
Net increase in other borrowings	27,830	7,005
Issuance of Bank Subordinated Notes	0	108,124
Net (decrease) increase in mortgage escrow funds	(419)	1,194
Proceeds from stock option exercises	493	546
Cash dividends paid	(9,436)	(9,075)
Net cash provided by financing activities	445,934	891,347
Net (decrease) increase in cash and cash equivalents	(39,943)	257,217
Cash and cash equivalents at beginning of period	293,646	229,513
Cash and cash equivalents at end of period	253,703	486,730
Supplemental cash flow information:
Interest payments	13,369	14,598
Income tax payments	2,785	17,179
Real estate acquired in settlement of loans	667	442
Loans transferred from held for investment to held for sale	28,990	19,054
Non-cash assets acquired:
Total loans, net	0	320,447
Accrued interest receivable	0	1,443
Goodwill	0	25,698
Customer list	0	1,500
Premises and equipment, net	0	176
Other assets	0	2,265
Total non-cash assets acquired	0	351,529
Other liabilities	0	4,839
Total liabilities assumed	0	4,839
Net non-cash assets acquired	0	346,690
Cash and cash equivalents received in acquisitions	0	4,762
Total consideration paid	$ 0	$ 351,452

Basis of Financial Statement Pr

Basis of Financial Statement Presentation	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Financial Statement Presentation	Basis of Financial Statement Presentation (a) Nature of Operations Sterling Bancorp (the “Company”) is a Delaware corporation, a bank holding company and a financial holding company headquartered in Montebello, New York that owns all of the outstanding shares of common stock of Sterling National Bank (the “Bank”), its principal subsidiary. The Bank is a full-service regional bank specializing in the delivery of services and solutions to business owners, their families and consumers within the communities it serves through teams of dedicated and experienced relationship managers. (b) Basis of Presentation The consolidated financial statements in this Quarterly Report on Form 10-Q include the accounts of the Company and all other entities in which the Company has a controlling financial interest. All significant intercompany balances and transactions have been eliminated in consolidation. The accounting and financial reporting policies the Company follows conform, in all material respects, to accounting principles generally accepted in the United States (“GAAP”) and to general practices within the banking industry, which include regulatory reporting instructions. The consolidated financial statements in this Quarterly Report on Form 10-Q have not been audited by an independent registered public accounting firm, but, in the opinion of management, reflect all adjustments necessary for a fair presentation of the Company’s financial position and results of operations. All such adjustments were of a normal and recurring nature. The consolidated financial statements have been prepared in accordance with GAAP and with the instructions to Form 10-Q adopted by the Securities and Exchange Commission (the “SEC”). Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our consolidated financial statements, and notes thereto, for the year ended December 31, 2016 , included in our Annual Report on Form 10-K, as filed with the SEC on February 27, 2017 (the “2016 Form 10-K”). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period. Certain items in prior financial statements have been reclassified to conform to the current presentation. These reclassifications had no impact on previously reported net income. (c) Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, income, expense and contingencies at the date of the financial statements. Actual results could differ significantly from these estimates, particularly the allowance for loan losses and the status of contingencies, are subject to change. (d) Pending Merger with Astoria Financial Corporation See Note 20. “Pending Merger with Astoria Financial Corporation.” for information. (e) Adoption of New Accounting Standard Effective January 1, 2017, the Company adopted the provisions of Accounting Standard Update (“ASU”) 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” This standard requires that all income tax effects related to settlements of stock-based compensation awards be reported in earnings as an increase or decrease to income tax expense. The impact of the adoption of this standard reduced reported income tax expense $742 , in the first quarter of 2017. The Company also elected to recognize forfeitures as they occur, which did not have a material impact to the consolidated financial statements.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
Acquisitions	Acquisitions Restaurant Franchise Financing Loan Portfolio On September 9, 2016, the Bank acquired a restaurant franchise financing loan portfolio from GE Capital with an unpaid principal balance of $169,760 . Total cash paid for the portfolio was $163,282 , which included a discount to the balance of gross loans receivable of 4.00% , or $6,790 , plus accrued interest receivable. As the acquired assets did not constitute a business, the transaction was accounted for as an asset purchase. These loans are classified as traditional commercial and industrial loans. See Note 4. “Portfolio Loans” for additional information. NSBC Acquisition On March 31, 2016 , the Bank acquired 100% of the outstanding equity interests of NSBC (the “NSBC Acquisition”). NSBC is a provider of asset-based lending solutions to middle market commercial clients. NSBC’s loans had a fair value of $320,447 on the acquisition date and consisted of 100% floating-rate assets. The Bank paid a premium on the balance of gross loans receivable acquired of 5.90% , or $18,906 . The Bank assumed $4,839 of liabilities, which consisted mainly of cash collateral on loans outstanding. The Bank recognized a customer list intangible asset of $1,500 that is being amortized over its 24 -month estimated life and $25,698 of goodwill. The Bank recorded a $1,500 restructuring charge consisting mainly of retention and severance compensation, IT contract terminations and professional fees.

Securities

Securities	3 Months Ended
	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Securities	Securities A summary of amortized cost and estimated fair value of securities as of March 31, 2017 and December 31, 2016 is presented below. The term “MBS” refers to mortgage-backed securities and the term “CMO” refers to collateralized mortgage obligations. Both of these terms are further defined in Note 17. “Fair Value Measurements”. March 31, 2017 Available for Sale Held to Maturity Amortized cost Gross unrealized gains Gross unrealized losses Fair value Amortized cost Gross unrecognized gains Gross unrecognized losses Fair value Residential MBS: Agency-backed $ 1,400,989 $ 1,178 $ (20,168 ) $ 1,381,999 $ 290,889 $ 1,544 $ (3,504 ) $ 288,929 CMO/Other MBS 54,057 53 (957 ) 53,153 38,490 65 (660 ) 37,895 Total residential MBS 1,455,046 1,231 (21,125 ) 1,435,152 329,379 1,609 (4,164 ) 326,824 Other securities: Federal agencies 199,045 — (9,915 ) 189,130 58,312 1,648 — 59,960 Corporate 61,488 439 (880 ) 61,047 35,000 656 — 35,656 State and municipal 258,991 1,188 (3,837 ) 256,342 1,046,283 4,663 (32,018 ) 1,018,928 Other — — — — 5,750 199 — 5,949 Total other securities 519,524 1,627 (14,632 ) 506,519 1,145,345 7,166 (32,018 ) 1,120,493 Total securities $ 1,974,570 $ 2,858 $ (35,757 ) $ 1,941,671 $ 1,474,724 $ 8,775 $ (36,182 ) $ 1,447,317 December 31, 2016 Available for Sale Held to Maturity Amortized cost Gross unrealized gains Gross unrealized losses Fair value Amortized cost Gross unrecognized gains Gross unrecognized losses Fair value Residential MBS: Agency-backed $ 1,213,733 $ 569 $ (20,821 ) $ 1,193,481 $ 277,539 $ 1,353 $ (3,625 ) $ 275,267 CMO/Other MBS 57,563 44 (926 ) 56,681 40,594 74 (572 ) 40,096 Total residential MBS 1,271,296 613 (21,747 ) 1,250,162 318,133 1,427 (4,197 ) 315,363 Other securities: Federal agencies 204,770 2 (10,793 ) 193,979 58,200 1,392 — 59,592 Corporate 43,464 150 (1,108 ) 42,506 35,048 431 (11 ) 35,468 State and municipal 245,304 739 (5,273 ) 240,770 974,290 3,571 (36,232 ) 941,629 Other — — — — 5,750 195 — 5,945 Total other securities 493,538 891 (17,174 ) 477,255 1,073,288 5,589 (36,243 ) 1,042,634 Total securities $ 1,764,834 $ 1,504 $ (38,921 ) $ 1,727,417 $ 1,391,421 $ 7,016 $ (40,440 ) $ 1,357,997 The amortized cost and estimated fair value of securities at March 31, 2017 are presented below by contractual maturity. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Residential MBS are shown separately since they are not due at a single maturity date. March 31, 2017 Available for sale Held to maturity Amortized cost Fair value Amortized cost Fair value Remaining period to contractual maturity: One year or less $ 12,315 $ 12,343 $ 22,829 $ 23,015 One to five years 95,619 95,455 65,479 66,997 Five to ten years 278,007 270,419 213,156 215,548 Greater than ten years 133,583 128,302 843,881 814,933 Total securities with a stated maturity date 519,524 506,519 1,145,345 1,120,493 Residential MBS 1,455,046 1,435,152 329,379 326,824 Total securities $ 1,974,570 $ 1,941,671 $ 1,474,724 $ 1,447,317 Sales of securities for the periods indicated below were as follows: For the three months ended March 31, 2017 2016 Available for sale: Proceeds from sales $ 232 $ 275,358 Gross realized gains 6 1,562 Gross realized (losses) (29 ) (1,845 ) Income tax (benefit) on realized net (losses) (7 ) (96 ) At March 31, 2017 and December 31, 2016 , there were no holdings of securities of any one issuer in an amount greater than 10% of stockholders’ equity, other than the U.S. federal government and its agencies. The following table summarizes securities available for sale with unrealized losses, segregated by the length of time in a continuous unrealized loss position for the periods presented below: Continuous unrealized loss position Less than 12 months 12 months or longer Total Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses Available for sale March 31, 2017 Residential MBS: Agency-backed $ 1,193,333 $ (20,162 ) $ 774 $ (6 ) $ 1,194,107 $ (20,168 ) CMO/Other MBS 35,701 (512 ) 14,050 (445 ) 49,751 (957 ) Total residential MBS 1,229,034 (20,674 ) 14,824 (451 ) 1,243,858 (21,125 ) Other securities: Federal agencies 189,126 (9,915 ) 4 — 189,130 (9,915 ) Corporate 10,317 (72 ) 15,087 (808 ) 25,404 (880 ) State and municipal 151,607 (3,758 ) 3,579 (79 ) 155,186 (3,837 ) Total other securities 351,050 (13,745 ) 18,670 (887 ) 369,720 (14,632 ) Total $ 1,580,084 $ (34,419 ) $ 33,494 $ (1,338 ) $ 1,613,578 $ (35,757 ) December 31, 2016 Residential MBS: Agency-backed $ 1,101,641 $ (20,816 ) $ 686 $ (5 ) $ 1,102,327 $ (20,821 ) CMO/Other MBS 38,841 (506 ) 15,239 (420 ) 54,080 (926 ) Total residential MBS 1,140,482 (21,322 ) 15,925 (425 ) 1,156,407 (21,747 ) Other securities: Federal agencies 185,504 (10,793 ) 4 — 185,508 (10,793 ) Corporate 10,399 (137 ) 14,942 (971 ) 25,341 (1,108 ) State and municipal 173,062 (5,196 ) 3,733 (77 ) 176,795 (5,273 ) Total other securities 368,965 (16,126 ) 18,679 (1,048 ) 387,644 (17,174 ) Total securities $ 1,509,447 $ (37,448 ) $ 34,604 $ (1,473 ) $ 1,544,051 $ (38,921 ) The following table summarizes securities held to maturity with unrecognized losses, segregated by the length of time in a continuous unrecognized loss position for the periods presented below: Continuous unrecognized loss position Less than 12 months 12 months or longer Total Fair value Unrecognized losses Fair value Unrecognized losses Fair value Unrecognized losses Held to maturity March 31, 2017 Residential MBS: Agency-backed $ 164,603 $ (3,185 ) $ 5,107 $ (319 ) $ 169,710 $ (3,504 ) CMO/Other MBS 32,975 (660 ) — — 32,975 (660 ) Total residential MBS 197,578 (3,845 ) 5,107 (319 ) 202,685 (4,164 ) Other securities: State and municipal 755,540 (31,862 ) 6,630 (156 ) 762,170 (32,018 ) Total $ 953,118 $ (35,707 ) $ 11,737 $ (475 ) $ 964,855 $ (36,182 ) December 31, 2016 Residential MBS: Agency-backed $ 185,116 $ (3,623 ) $ 213 $ (2 ) $ 185,329 $ (3,625 ) CMO/Other MBS 34,786 (572 ) — — 34,786 (572 ) Total residential MBS 219,902 (4,195 ) 213 (2 ) 220,115 (4,197 ) Other securities: Corporate — — 5,037 (11 ) 5,037 (11 ) State and municipal 758,690 (36,169 ) 2,816 (63 ) 761,506 (36,232 ) Total other securities 758,690 (36,169 ) 7,853 (74 ) 766,543 (36,243 ) Total securities $ 978,592 $ (40,364 ) $ 8,066 $ (76 ) $ 986,658 $ (40,440 ) At March 31, 2017 , a total of 261 available for sale securities were in a continuous unrealized loss position for less than 12 months and 41 available for sale securities were in a continuous unrealized loss position for 12 months or longer. Declines in the fair value of held to maturity and available for sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized in other comprehensive income. In estimating other than temporary impairment (“OTTI”) losses, management considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost; (ii) the financial condition and near-term prospects of the issuer; and (iii) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in cost. Management has the ability and intent to hold the securities classified as held to maturity in the table above until they mature, at which time the Company anticipates it will receive full value for the securities. Furthermore, as of March 31, 2017 , management did not have the intent to sell any of the securities classified as available for sale in the table above and believes that it is more likely than not that the Company will not have to sell any such securities before a recovery of cost. Any unrealized losses are largely due to increases in market interest rates over the yields available at the time the underlying securities were purchased. The fair value is expected to recover as the securities approach their maturity date or repricing date or if market yields for such investments decline. Management does not believe any of the securities are impaired due to reasons related to credit quality. As of March 31, 2017 , management believes the impairments detailed in the table above are temporary. Securities pledged for borrowings at the FHLB and other institutions, and securities pledged for municipal deposits and other purposes, were as follows for the periods presented below: March 31, December 31, 2017 2016 Available for sale securities pledged for borrowings, at fair value $ 29,527 $ 67,599 Available for sale securities pledged for municipal deposits, at fair value 357,056 398,961 Available for sale securities pledged for customer back-to-back swaps, at fair value — 126 Held to maturity securities pledged for borrowings, at amortized cost 101,564 55,343 Held to maturity securities pledged for municipal deposits, at amortized cost 955,363 958,246 Total securities pledged $ 1,443,510 $ 1,480,275

Portfolio Loans

Portfolio Loans	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Portfolio Loans	Portfolio Loans The composition of the Company’s loan portfolio, excluding loans held for sale, was the following for the periods presented below: March 31, December 31, 2017 2016 Commercial: Commercial and industrial (“C&I”): Traditional C&I $ 1,469,130 $ 1,404,774 Asset-based lending 735,737 741,942 Payroll finance 223,934 255,549 Warehouse lending 486,381 616,946 Factored receivables 191,398 214,242 Equipment financing 662,844 589,315 Public sector finance 412,394 349,182 Total C&I 4,181,818 4,171,950 Commercial mortgage: Commercial real estate 3,313,848 3,162,942 Multi-family 1,062,797 981,076 Acquisition, development & construction (“ADC”) 238,966 230,086 Total commercial mortgage 4,615,611 4,374,104 Total commercial 8,797,429 8,546,054 Residential mortgage 695,398 697,108 Consumer 271,140 284,068 Total portfolio loans 9,763,967 9,527,230 Allowance for loan losses (66,939 ) (63,622 ) Total portfolio loans, net $ 9,697,028 $ 9,463,608 Total portfolio loans include net deferred loan origination fees of $3,725 and $1,788 at March 31, 2017 and December 31, 2016 , respectively. At March 31, 2017 and December 31, 2016 , the Company pledged loans with an unpaid principal balance of $2,489,394 and $2,349,604 , respectively, to the FHLB as collateral for certain borrowing arrangements. See Note 8. “Borrowings”. The following tables set forth the amounts and status of the Company’s loans, troubled debt restructurings (“TDRs”) and non-performing loans at March 31, 2017 and December 31, 2016 : March 31, 2017 Current 30-59 days past due 60-89 days past due 90+ days past due Non- accrual Total Traditional C&I $ 1,441,001 $ 758 $ 1,015 $ 274 $ 26,082 $ 1,469,130 Asset-based lending 735,737 — — — — 735,737 Payroll finance 223,460 — 90 — 384 223,934 Warehouse lending 486,381 — — — — 486,381 Factored receivables 191,206 — — — 192 191,398 Equipment financing 657,646 1,476 1,018 — 2,704 662,844 Public sector finance 412,394 — — — — 412,394 Commercial real estate 3,290,081 2,505 796 318 20,148 3,313,848 Multi-family 1,062,732 — — — 65 1,062,797 ADC 235,703 — 2,000 88 1,175 238,966 Residential mortgage 677,587 2,279 1,035 108 14,389 695,398 Consumer 261,504 2,330 309 — 6,997 271,140 Total portfolio loans $ 9,675,432 $ 9,348 $ 6,263 $ 788 $ 72,136 $ 9,763,967 Total TDRs included above $ 15,741 $ — $ — $ 128 $ 2,530 $ 18,399 Non-performing loans: Loans 90+ days past due and still accruing $ 788 Non-accrual loans 72,136 Total non-performing loans $ 72,924 December 31, 2016 Current 30-59 days past due 60-89 days past due 90+ days past due Non- accrual Total Traditional C&I $ 1,376,181 $ 835 $ 817 $ 555 $ 26,386 $ 1,404,774 Asset-based lending 741,942 — — — — 741,942 Payroll finance 254,715 — 14 621 199 255,549 Warehouse lending 616,946 — — — — 616,946 Factored receivables 213,624 — — — 618 214,242 Equipment financing 583,835 2,142 1,092 — 2,246 589,315 Public sector finance 349,182 — — — — 349,182 Commercial real estate 3,140,561 967 — 406 21,008 3,162,942 Multi-family 981,005 — — — 71 981,076 ADC 224,817 — — — 5,269 230,086 Residential mortgage 675,750 5,509 951 108 14,790 697,108 Consumer 274,719 2,423 350 — 6,576 284,068 Total portfolio loans $ 9,433,277 $ 11,876 $ 3,224 $ 1,690 $ 77,163 $ 9,527,230 Total TDRs included above $ 11,032 $ 253 $ — $ — $ 1,989 $ 13,274 Non-performing loans: Loans 90+ days past due and still accruing $ 1,690 Non-accrual loans 77,163 Total non-performing loans $ 78,853 The following table provides additional analysis of the Company’s non-accrual loans at March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 Recorded investment Non-accrual loans Recorded investment PCI (1) non-accrual loans Recorded investment total non-accrual loans Unpaid principal balance non-accrual loans Recorded investment Non-accrual loans Recorded investment PCI non-accrual loans Recorded investment total non-accrual loans Unpaid principal balance non-accrual loans Traditional C&I $ 22,047 $ 4,035 $ 26,082 $ 26,606 $ 22,338 $ 4,048 $ 26,386 $ 26,386 Payroll finance 384 — 384 1,746 199 — 199 199 Factored receivables 192 — 192 192 618 — 618 618 Equipment financing 2,704 — 2,704 2,704 2,246 — 2,246 2,246 Commercial real estate 14,254 5,894 20,148 25,229 15,063 5,945 21,008 25,619 Multi-family 65 — 65 71 71 — 71 71 ADC 1,175 — 1,175 1,310 5,269 — 5,269 5,398 Residential mortgage 13,008 1,381 14,389 17,361 13,399 1,391 14,790 18,190 Consumer 6,147 850 6,997 8,246 5,719 857 6,576 7,865 Total $ 59,976 $ 12,160 $ 72,136 $ 83,465 $ 64,922 $ 12,241 $ 77,163 $ 86,592 (1) The Company acquired loans for which there was, at acquisition, both evidence of deterioration of credit quality since origination and probability, at acquisition, that all contractually required payments would not be collected. These loans are classified as purchased credit impaired loans (“PCI loans”). There were no non-accrual asset-based lending, warehouse lending or public sector finance loans at March 31, 2017 or December 31, 2016 . When the ultimate collectibility of the total principal of an impaired loan is in doubt and the loan is on non-accrual status, all payments are applied to principal, under the cost recovery method. When the ultimate collectibility of the total principal of an impaired loan is not in doubt and the loan is on non-accrual status, contractual interest is credited to interest income when received, under the cash basis method. At March 31, 2017 and December 31, 2016 , the recorded investment of residential mortgage loans that were in the process of foreclosure was $9,604 and $9,263 , respectively, which are included in non-accrual residential mortgage loans above. The following table sets forth loans evaluated for impairment by segment and the allowance evaluated by segment at March 31, 2017 : Loans evaluated by segment Allowance evaluated by segment Individually evaluated for impairment Collectively evaluated for impairment PCI loans Total loans Individually evaluated for impairment Collectively evaluated for impairment Total allowance for loan losses Traditional C&I $ 24,975 $ 1,430,558 $ 13,597 $ 1,469,130 $ — $ 14,441 $ 14,441 Asset-based lending — 720,242 15,495 735,737 — 3,353 3,353 Payroll finance — 223,934 — 223,934 — 1,155 1,155 Warehouse lending — 486,381 — 486,381 — 1,227 1,227 Factored receivables — 191,398 — 191,398 — 1,322 1,322 Equipment financing 4,952 657,892 — 662,844 — 6,039 6,039 Public sector finance — 412,394 — 412,394 — 1,249 1,249 Commercial real estate 14,787 3,256,578 42,483 3,313,848 — 23,438 23,438 Multi-family — 1,058,455 4,342 1,062,797 — 4,102 4,102 ADC 5,951 227,986 5,029 238,966 — 1,170 1,170 Residential mortgage 2,545 691,307 1,546 695,398 — 5,715 5,715 Consumer 1,497 268,045 1,598 271,140 — 3,728 3,728 Total portfolio loans $ 54,707 $ 9,625,170 $ 84,090 $ 9,763,967 $ — $ 66,939 $ 66,939 The following table sets forth loans evaluated for impairment by segment and the allowance evaluated by segment at December 31, 2016 : Loans evaluated by segment Allowance evaluated by segment Individually evaluated for impairment Collectively evaluated for impairment PCI loans Total loans Individually evaluated for impairment Collectively evaluated for impairment Total allowance for loan losses Traditional C&I $ 25,221 $ 1,365,466 $ 14,087 $ 1,404,774 $ — $ 12,864 $ 12,864 Asset-based lending — 724,247 17,695 741,942 — 3,316 3,316 Payroll finance 570 254,979 — 255,549 — 951 951 Warehouse lending — 616,946 — 616,946 — 1,563 1,563 Factored receivables — 214,242 — 214,242 — 1,669 1,669 Equipment financing 1,413 587,902 — 589,315 — 5,039 5,039 Public sector finance — 349,182 — 349,182 — 1,062 1,062 Commercial real estate 14,853 3,104,057 44,032 3,162,942 — 20,466 20,466 Multi-family — 976,710 4,366 981,076 — 4,991 4,991 ADC 9,025 216,094 4,967 230,086 — 1,931 1,931 Residential mortgage 2,545 692,396 2,167 697,108 — 5,864 5,864 Consumer 1,764 280,710 1,594 284,068 — 3,906 3,906 Total portfolio loans $ 55,391 $ 9,382,931 $ 88,908 $ 9,527,230 $ — $ 63,622 $ 63,622 Management considers a loan to be impaired when, based on current information and events, it is determined that the Company will not be able to collect all amounts due according to the loan contract, including scheduled interest payments. Evaluation of impairment is treated the same across all classes of loans on a loan-by-loan basis, except residential mortgage loans and home equity lines of credit (“HELOC”) and consumer loans with an outstanding balance of $500 or less, which are evaluated for impairment on a homogeneous pool basis. (HELOC loans are included within consumer loans). When management identifies a loan as impaired, the impairment is measured based on the present value of expected future cash flows, discounted at the loan’s effective interest rate, except when the sole remaining source of repayment of the loan is the operation or liquidation of the collateral. In these cases, management uses the current fair value of the collateral, less selling costs when foreclosure or liquidation is probable, instead of discounted cash flows. If management determines that the value of the impaired loan is less than the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs and unamortized premium or discount), impairment is generally recognized through a charge-off to the allowance for loan losses. The carrying amount of PCI loans is presented in the tables above. At March 31, 2017 , the net recorded amount of PCI loans was $84,090 , which included $15,495 of asset-based lending loans acquired in the NSBC Acquisition. There was $724 and $685 included in the allowance for loan losses associated with PCI loans at March 31, 2017 and December 31, 2016 , respectively. The following table presents the changes in the balance of the accretable yield discount for PCI loans for three months ended March 31, 2017 and 2016 : For the three months ended March 31, 2017 2016 Balance at beginning of period $ 11,117 $ 11,211 Balances acquired in the NSBC Acquisition — 2,200 Accretion of income (1,199 ) (1,155 ) Disposals — — Reclassification from non-accretable difference 815 266 Balance at end of period $ 10,733 $ 12,522 Income is not recognized on PCI loans unless the Company can reasonably estimate the cash flows that are expected to be collected over the life of the loan. The balance of PCI loans that were treated under the cost recovery method was $12,160 and $12,241 at March 31, 2017 and December 31, 2016 , respectively. The following table presents loans individually evaluated for impairment, excluding PCI loans, by segment of loans at March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 Unpaid principal balance Recorded investment Unpaid principal balance Recorded investment Loans with no related allowance recorded: Traditional C&I $ 25,355 $ 24,975 $ 25,221 $ 25,221 Payroll finance — — 570 570 Equipment financing 4,952 4,952 1,413 1,413 Commercial real estate 18,225 14,787 16,365 14,853 ADC 6,208 5,951 9,025 9,025 Residential mortgage 2,545 2,545 2,545 2,545 Consumer 1,497 1,497 1,764 1,764 Total $ 58,782 $ 54,707 $ 56,903 $ 55,391 At March 31, 2017 and December 31, 2016 there were no asset-based lending, factored receivables, warehouse lending, public sector finance loans or multi-family loans that were individually evaluated for impairment. The Company’s policy generally requires a charge-off of the difference between the present value of the cash flows or the net collateral value of the collateral securing the loan and the Company’s recorded investment. As a result, there were no impaired loans with an allowance recorded at March 31, 2017 or December 31, 2016 . The following tables present the average recorded investment and interest income recognized related to loans individually evaluated for impairment by segment for the three months ended March 31, 2017 and March 31, 2016 : For the three months ended March 31, 2017 March 31, 2016 QTD average recorded investment Interest income recognized QTD average recorded investment Interest income recognized Loans with no related allowance recorded: Traditional C&I $ 24,912 $ 7 $ 15,366 $ 9 Equipment financing 1,638 — 1,288 — Commercial real estate 14,124 40 13,118 39 Multi-family — — 884 — ADC 5,513 51 8,632 56 Residential mortgage 2,545 — 515 — Consumer 1,497 — 748 — Total $ 50,229 $ 98 $ 40,551 $ 104 There were no impaired loans with an allowance recorded at March 31, 2017 or December 31, 2016 . For the three months ended March 31, 2017 and 2016 , there were no asset-based lending, payroll finance, factored receivables, warehouse lending, or public sector finance loans that were impaired and there was no cash-basis interest income recognized. Troubled Debt Restructuring (“TDRs”) The following tables set forth the amounts and past due status of the Company’s TDRs at March 31, 2017 and December 31, 2016 : March 31, 2017 Current loans 30-59 days past due 60-89 days past due 90+ days past due Non- accrual Total Traditional C&I $ 570 $ — $ — $ — $ — $ 570 Equipment financing 3,088 — — — — 3,088 Commercial real estate 4,275 — — 128 — 4,403 ADC 5,574 — — — 1,175 6,749 Residential mortgage 2,234 — — — 1,355 3,589 Total $ 15,741 $ — $ — $ 128 $ 2,530 $ 18,399 December 31, 2016 Current loans 30-59 days past due 60-89 days past due 90+ days past due Non- accrual Total Traditional C&I $ 572 $ — $ — $ — $ 128 $ 700 Equipment financing — — — — 29 29 Commercial real estate 2,443 253 — — — 2,696 ADC 5,962 — — — 458 6,420 Residential mortgage 2,055 — — — 1,374 3,429 Total $ 11,032 $ 253 $ — $ — $ 1,989 $ 13,274 There were no asset-based lending, payroll finance, warehouse lending, factored receivables, public sector finance, multi-family or consumer loans that were TDRs for either period presented above. The Company did not have outstanding commitments to lend additional amounts to customers with loans classified as TDRs as of March 31, 2017 or December 31, 2016 . There were six loans modified as a TDR in the three months ended March 31, 2017 . These TDRs did not increase the allowance for loan losses and did not result in charge-offs in the three months ended March 31, 2017 . The following table presents loans by segment modified as TDRs that occurred during the first three months of 2017 and 2016 : March 31, 2017 March 31, 2016 Recorded investment Recorded investment Number Pre- modification Post- modification Number Pre- modification Post- modification Equipment financing 2 $ 3,088 $ 3,089 — $ — $ — Commercial real estate 2 1,724 1,724 — — — ADC 1 797 797 — — — Residential mortgage 1 239 238 1 469 469 Total TDRs 6 $ 5,848 $ 5,848 1 $ 469 $ 469 There were no TDRs that were modified during the three months ended March 31, 2017 or 2016 that subsequently defaulted (which is defined as missing three consecutive monthly payments or being over 90 days past due on a scheduled payment).

Allowance for Loan Losses

Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses Activity in the allowance for loan losses for the three months ended March 31, 2017 and 2016 is summarized below: For the three months ended March 31, 2017 Beginning balance Charge-offs Recoveries Net charge-offs Provision / (reversal of) Ending balance Traditional C&I $ 12,864 $ (687 ) $ 139 $ (548 ) $ 2,125 $ 14,441 Asset-based lending 3,316 — 3 3 34 3,353 Payroll finance 951 — — — 204 1,155 Warehouse lending 1,563 — — — (336 ) 1,227 Factored receivables 1,669 (296 ) 16 (280 ) (67 ) 1,322 Equipment financing 5,039 (471 ) 140 (331 ) 1,331 6,039 Public sector finance 1,062 — — — 187 1,249 Commercial real estate 20,466 (83 ) 2 (81 ) 3,053 23,438 Multi-family 4,991 — — — (889 ) 4,102 ADC 1,931 — 136 136 (897 ) 1,170 Residential mortgage 5,864 (158 ) 149 (9 ) (140 ) 5,715 Consumer 3,906 (114 ) 41 (73 ) (105 ) 3,728 Total allowance for loan losses $ 63,622 $ (1,809 ) $ 626 $ (1,183 ) $ 4,500 $ 66,939 Annualized net charge-offs to average loans outstanding: 0.05 % For the three months ended March 31, 2016 Beginning balance Charge-offs Recoveries Net charge-offs Provision / (reversal of) Ending balance Traditional C&I $ 9,922 $ (489 ) $ 313 $ (176 ) $ 1,159 $ 10,905 Asset-based lending 2,793 — 16 16 — 2,809 Payroll finance 1,936 — 4 4 (394 ) 1,546 Warehouse lending 589 — — — (69 ) 520 Factored receivables 1,457 (81 ) 24 (57 ) 7 1,407 Equipment financing 4,925 (457 ) 108 (349 ) 817 5,393 Public Sector Finance 547 — — — 8 555 Commercial real estate 13,861 (4 ) 21 17 1,892 15,770 Multi-family 2,741 — 2 2 253 2,996 ADC 2,009 — — — 148 2,157 Residential mortgage 5,007 (224 ) 28 (196 ) 39 4,850 Consumer 4,358 (511 ) 119 (392 ) 140 4,106 Total allowance for loan losses $ 50,145 $ (1,766 ) $ 635 $ (1,131 ) $ 4,000 $ 53,014 Annualized net charge-offs to average loans outstanding: 0.06 % The following table presents the allowance for loan losses to originated loans as of March 31, 2017 . The population of originated loans includes loans originated by the Company and acquired loans that have migrated into the population of loans covered by our allowance for loan losses. March 31, 2017 Originated: Pass Special mention Substandard Doubtful Loss Total Traditional C&I $ 1,085,899 $ 10,525 $ 41,457 $ 902 $ — $ 1,138,783 Asset-based lending 573,159 10,966 — — — 584,125 Payroll finance 203,878 19,672 384 — — 223,934 Warehouse lending 486,381 — — — — 486,381 Factored receivables 191,141 65 192 — — 191,398 Equipment financing 632,705 4,812 2,704 — — 640,221 Public sector finance 412,394 — — — — 412,394 Commercial real estate 3,125,759 11,908 18,103 — — 3,155,770 Multi-family 981,170 1,483 650 — — 983,303 ADC 227,525 6,620 4,821 — — 238,966 Residential mortgage 513,168 486 14,012 — — 527,666 Consumer 180,978 313 7,160 — — 188,451 Total originated loans $ 8,614,157 $ 66,850 $ 89,483 $ 902 $ — $ 8,771,392 Allowance for loan losses $ 60,193 $ 2,010 $ 4,061 $ 675 $ — $ 66,939 As a % of originated loans 0.70 % 3.01 % 4.54 % 74.83 % — % 0.76 % In purchase accounting, the prior allowance for loan losses is not carried over, and in its place, the Company is required to estimate the fair value of loans acquired, which is included as a purchase discount within the acquired loan discount. The following analysis presents the remaining purchase accounting marks to acquired loan portfolios as of March 31, 2017 . March 31, 2017 Acquired loans: Pass Special mention Substandard Doubtful Loss Total Traditional C&I $ 324,748 $ 5,314 $ 285 $ — $ — $ 330,347 Asset-based lending 145,365 6,247 — — — 151,612 Equipment financing 22,623 — — — — 22,623 Commercial real estate 121,510 26,327 10,241 — — 158,078 Multi-family 73,949 5,545 — — — 79,494 Residential mortgage 165,696 549 1,487 — — 167,732 Consumer 82,689 — — — — 82,689 Total loans subject to purchase accounting marks $ 936,580 $ 43,982 $ 12,013 $ — $ — $ 992,575 Remaining purchase accounting mark $ 31,433 $ 1,759 $ 991 $ — $ — $ 34,183 As a % of acquired loans 3.36 % 4.00 % 8.25 % — % — % 3.44 % Total portfolio loans $ 9,550,737 $ 110,832 $ 101,496 $ 902 $ — $ 9,763,967 The following table presents the allowance for loan losses to originated loans as of December 31, 2016 . December 31, 2016 Originated: Pass Special mention Substandard Doubtful Loss Total Traditional C&I $ 1,009,605 $ 5,104 $ 28,496 $ 442 $ — $ 1,043,647 Asset-based lending 545,220 17,678 — — — 562,898 Payroll finance 254,729 — 820 — — 255,549 Warehouse lending 616,946 — — — — 616,946 Factored receivables 213,624 185 433 — — 214,242 Equipment financing 556,522 2,128 3,397 — — 562,047 Public sector finance 349,182 — — — — 349,182 Commercial real estate 2,869,306 12,492 19,130 — — 2,900,928 Multi-family 866,825 1,497 658 — — 868,980 ADC 214,317 6,899 8,870 — — 230,086 Residential mortgage 505,803 951 14,578 — — 521,332 Consumer 191,961 646 6,738 — — 199,345 Total originated loans $ 8,194,040 $ 47,580 $ 83,120 $ 442 $ — $ 8,325,182 Allowance for loan losses $ 58,217 $ 1,423 $ 3,650 $ 332 $ — $ 63,622 As a % of originated loans 0.71 % 2.99 % 4.39 % 75.11 % — % 0.76 % The following analysis presents the remaining purchase accounting marks to acquired loan portfolios as of December 31, 2016 . December 31, 2016 Acquired loans: Pass Special mention Substandard Doubtful Loss Total Traditional C&I $ 353,625 $ 7,021 $ 481 $ — $ — $ 361,127 Asset-based lending 161,349 17,695 — — — 179,044 Equipment financing 27,268 — — — — 27,268 Commercial real estate 224,983 26,698 10,333 — — 262,014 Multi-family 106,521 5,575 — — — 112,096 Residential mortgage 174,558 — 1,218 — — 175,776 Consumer 84,723 — — — — 84,723 Total loans subject to purchase accounting marks $ 1,133,027 $ 56,989 $ 12,032 $ — $ — $ 1,202,048 Remaining purchase accounting mark $ 34,322 $ 1,725 $ 965 $ — $ — $ 37,012 As a % of acquired loans 3.03 % 3.03 % 8.02 % — % — % 3.08 % Total portfolio loans $ 9,327,067 $ 104,569 $ 95,152 $ 442 $ — $ 9,527,230 Credit Quality Indicators As part of the ongoing monitoring of the credit quality of the Company’s loan portfolio, management tracks certain credit quality indicators, including trends related to (i) the weighted-average risk grade of commercial loans; (ii) the level of classified commercial loans; (iii) the delinquency status of residential mortgage and consumer loans HELOC and other consumer loans; (iv) net charge-offs; (v) non-performing loans (see details above); and (vi) the general economic conditions in the greater New York metropolitan region. The Company analyzes loans individually by classifying the loans by credit risk, except residential mortgage loans, HELOC and other consumer loans, which are evaluated on a homogeneous pool basis unless the loan balance is greater than $500 . This analysis is performed at least quarterly on all criticized/classified loans. The Company uses the following definitions of risk ratings: 1 and 2 - These grades include loans that are secured by cash, marketable securities or cash surrender value of life insurance policies. 3 - This grade includes loans to borrowers with strong earnings and cash flow and that have the ability to service debt. The borrower’s assets and liabilities are generally well-matched and are above average quality. The borrower has ready access to multiple sources of funding, including alternatives such as term loans, private equity placements or trade credit. 4 - This grade includes loans to borrowers with above average cash flow, adequate earnings and debt service coverage ratios. The borrower generates discretionary cash flow, assets and liabilities are reasonably matched, and the borrower has access to other sources of debt funding or additional trade credit at market rates. 5 - This grade includes loans to borrowers with adequate earnings and cash flow and reasonable debt service coverage ratios. Overall leverage is acceptable and there is average reliance upon trade credit. Management has a reasonable amount of experience and depth, and owners are willing to invest available outside capital, as necessary. 6 - This grade includes loans to borrowers where there is evidence of some strain, earnings are inconsistent and volatile, and the borrowers’ outlook is uncertain. Generally, such borrowers have higher leverage than those with a better risk rating. These borrowers typically have limited access to alternative sources of bank debt and may be dependent upon debt funding for working capital support. 7 - Special Mention (OCC definition) - Other Assets Especially Mentioned (“OAEM”) are loans that have potential weaknesses which may, if not reversed or corrected, weaken the asset or inadequately protect the Bank’s credit position at some future date. Such assets constitute an undue and unwarranted credit risk but not to the point of justifying a classification of “Substandard.” The credit risk may be relatively minor yet constitute an unwarranted risk in light of the circumstances surrounding a specific asset. 8 - Substandard (OCC definition) - These loans are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified must have a well-defined weakness that jeopardizes the liquidation of the debt. They are characterized by the distinct possibility that the Bank will sustain some losses if the deficiencies are not corrected. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual assets classified as substandard. 9 - Doubtful (OCC definition) - These loans have all the weakness inherent in one classified as “Substandard” with the added characteristics that the weakness makes collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. The possibility of loss is extremely high, but, because of certain important and reasonably specific pending factors which may work to the advantage and strengthening of the asset, its classification as an estimated loss is deferred until its more exact status may be determined. Pending factors may include a proposed merger, acquisition, liquidating procedures, capital injection, perfecting liens or additional collateral and refinancing plans. 10 - Loss (OCC definition) - These loans are charged-off because they are determined to be uncollectible and unbankable assets. This classification does not indicate that the asset has no absolute recovery or salvage value, but rather it is not practical or desirable to defer writing-off this asset even though partial recovery may be effected in the future. Losses should be taken in the period in which they are determined to be uncollectible. Loans that are risk-rated 1 through 6, as defined above, are considered to be pass-rated loans. As of March 31, 2017 and December 31, 2016 , the risk category of gross loans by segment was as follows: March 31, 2017 December 31, 2016 Special mention Substandard Doubtful Special mention Substandard Doubtful Traditional C&I $ 15,839 $ 41,742 $ 902 $ 12,125 $ 28,977 $ 442 Asset-based lending 17,213 — — 35,373 — — Payroll finance 19,672 384 — — 820 — Factored receivables 65 192 — 185 433 — Equipment financing 4,812 2,704 — 2,128 3,397 — Commercial real estate 38,235 28,344 — 39,190 29,463 — Multi-family 7,028 650 — 7,072 658 — ADC 6,620 4,821 — 6,899 8,870 — Residential mortgage 1,035 15,499 — 951 15,796 — Consumer 313 7,160 — 646 6,738 — Total $ 110,832 $ 101,496 $ 902 $ 104,569 $ 95,152 $ 442 There were no criticized or classified warehouse lending or public sector finance loans for the periods presented. There were no loans rated “loss” at March 31, 2017 and December 31, 2016 . Included in asset-based lending loans rated special mention at March 31, 2017 were $10,952 of loans acquired in the NSBC Acquisition.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The balance of goodwill and other intangible assets for the periods presented were as follows: March 31, December 31, 2017 2016 Goodwill $ 696,600 $ 696,600 Other intangible assets: Core deposits $ 35,808 $ 37,455 Customer lists 7,226 7,683 Non-compete agreements 500 625 Trade name 20,500 20,500 Fair value of below market leases 64 90 Total $ 64,098 $ 66,353 The decrease in goodwill and other intangible assets at March 31, 2017 compared to December 31, 2016 was due to amortization of intangibles. The estimated aggregate future amortization expense for intangible assets remaining as of March 31, 2017 was as follows: Amortization expense Remainder of 2017 $ 6,583 2018 7,285 2019 6,074 2020 5,428 2021 5,022 2022 4,522 Thereafter 8,684 Total $ 43,598

Deposits

Deposits	3 Months Ended
	Mar. 31, 2017
Deposits [Abstract]
Deposits	Deposits Deposit balances at March 31, 2017 and December 31, 2016 were as follows: March 31, December 31, 2017 2016 Non-interest bearing demand $ 3,196,841 $ 3,239,332 Interest bearing demand 2,217,719 2,220,456 Savings 801,887 747,031 Money market 3,488,716 3,277,686 Certificates of deposit 546,562 583,754 Total deposits $ 10,251,725 $ 10,068,259 Municipal deposits totaled $1,391,221 and $1,270,921 at March 31, 2017 and December 31, 2016 , respectively. See Note 3. “Securities” for the aggregate amount of securities that were pledged as collateral for municipal deposits and other purposes. Brokered deposits at March 31, 2017 and December 31, 2016 were as follows: March 31, December 31, 2017 2016 Interest bearing demand $ 368,055 $ 426,437 Money market 244,722 246,572 Money market - reciprocal brokered deposits 156,122 153,060 Savings 8,000 5,560 Certificates of deposit - CDARs 1 one way 33,176 — Total brokered deposits $ 810,075 $ 831,629 1 CDARs (Certificate of deposit account registry service)

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2017
Debt Instruments [Abstract]
Borrowings	Borrowings The Company’s borrowings and weighted average interest rates were as follows for the periods presented: March 31, December 31, 2017 2016 Amount Rate Amount Rate By type of borrowing: FHLB borrowings $ 2,035,000 1.19 % $ 1,791,000 1.01 % Repurchase agreements 24,472 0.73 16,642 0.75 Federal funds purchased 20,000 1.03 — — Senior Notes 76,551 5.98 76,469 5.98 Subordinated Notes 172,553 5.45 172,501 5.45 Total borrowings $ 2,328,576 1.66 % $ 2,056,612 1.56 % By remaining period to maturity: Less than one year $ 1,469,472 1.05 % $ 1,397,642 0.87 % One to two years 436,551 2.21 311,469 2.53 Two to three years 150,000 1.53 75,000 1.50 Three to four years 100,000 1.80 50,000 1.38 Four to five years — — 50,000 1.68 Greater than five years 172,553 5.45 172,501 5.45 Total borrowings $ 2,328,576 1.66 % $ 2,056,612 1.56 % FHLB borrowings. As a member of the FHLB, the Bank may borrow up to a discounted percentage of the amount of eligible mortgages and securities that have been pledged as collateral under a blanket security agreement. As of March 31, 2017 and December 31, 2016 , the Bank had total residential mortgage and commercial real estate loans pledged after discount of $2,489,394 and $2,349,604 , respectively. In addition to the pledged mortgages, the Bank had also pledged securities to secure borrowings, which are disclosed in Note 3. “Securities.” As of March 31, 2017 , the Bank had unused borrowing capacity at the FHLB of $594,535 and may increase its borrowing capacity by pledging securities not required to be pledged for other purposes with a collateral value of approximately $1,816,546 . Repurchase agreements. The Bank enters into sales of securities under agreements to repurchase. These repurchase agreements facilitate the needs of our customers and a portion of our secured short-term funding needs. Securities sold under agreements to repurchase at March 31, 2017 and December 31, 2016 are secured short-term borrowings that mature in one to 45 days and are generally renewed on a continuous basis. Repurchase agreements are stated at the amount of cash received in connection with these transactions. The securities pledged under these repurchase agreements fluctuate in value due to market conditions. The Bank is obligated to promptly transfer additional securities if the market value of the securities falls below the repurchase agreement price. Securities pledged as collateral under repurchase agreements are maintained with our safekeeping agents. Federal funds purchased. The Bank maintains federal funds purchase lines with several financial institutions. Federal funds purchased are short-term borrowings that typically mature overnight. Federal funds purchased totaled $20,000 and $0 at March 31, 2017 and December 31, 2016, respectively. Senior Notes. On July 2, 2013 , the Company issued $100,000 principal amount of 5.50% fixed rate senior notes (the “Senior Notes”) through a private placement at a discount of 1.75% . The cost of issuance was $303 , and at March 31, 2017 and December 31, 2016 the unamortized discount was $449 and $531 , respectively, which will be accreted to interest expense over the life of the Senior Notes, resulting in an effective yield of 5.98% . Interest is due semi-annually in arrears on January 2 and July 2 until maturity on July 2, 2018 . During September 2016, the Company redeemed $23,000 of the Senior Notes. Subordinated Notes . On March 29, 2016 , the Bank issued $110,000 principal amount of 5.25% fixed-to-floating rate subordinated notes (the “Subordinated Notes”) through a private placement at a discount of 1.25% . The cost of issuance was $500 . On September 2, 2016, the Bank reopened the Subordinated Notes offering and issued an additional $65,000 principal amount of Subordinated Notes. The Subordinated Notes issued September 2, 2016 are fully fungible with, rank equally in right of payment with, and form a single series with the Subordinated Notes issued in March 2016. The Subordinated Notes were issued to the purchasers at a premium of 0.50% and an underwriters discount of 1.25% . The cost of issuance was $275 . At March 31, 2017 , the net unamortized discount of all Subordinated Notes was $2,447 , which will be accreted to interest expense over the life of the Subordinated Notes, resulting in an effective yield of 5.45% . Interest is due semi-annually in arrears on April 1 and October 1 of each year, beginning on October 1, 2016 , until April 1, 2021 . From and including April 1, 2021 , the Subordinated Notes will bear interest at a floating rate per annum equal to three-month LIBOR plus 3.937% , payable quarterly on January 1 , April 1 , July 1 and October 1 of each year, beginning on July 1, 2021 , through maturity on April 1, 2026 or earlier redemption. The Subordinated Notes are also redeemable by the Bank, in whole or in part, on April 1, 2021 and each interest payment date thereafter. The Subordinated Notes are redeemable in whole at any time upon the occurrence of certain specified events. The Subordinated Notes are unsecured, subordinated obligations of the Bank and are subordinated in right of payment to all of the Bank’s existing and future senior indebtedness, including claims of depositors and general creditors. The Subordinated Notes qualify as Tier 2 capital for regulatory purposes. See Note 15. “Stockholders’ Equity,” for additional information. Revolving line of credit. On September 5, 2016, the Company renewed its $25,000 revolving line of credit facility (the “Credit Facility”). The Credit Facility, which is with another financial institution, matures on September 4, 2017. The balance was zero at March 31, 2017 and December 31, 2016 . The use of proceeds are for general corporate purposes. The Credit Facility and accrued interest is payable at maturity, and the Company is required to maintain a zero balance for at least 30 days during its term. Loans under the Credit Facility bear interest at one-month LIBOR plus 1.25% . Under the terms of the Credit Facility, the Company and the Bank must maintain certain ratios related to capital, non-performing assets to capital, reserves to non-performing loans and debt service coverage. The Company and the Bank were in compliance with all requirements of the Credit Facility at March 31, 2017 .

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedges, Assets [Abstract]
Derivatives	Derivatives The Company has entered into certain interest rate swap contracts that are not designated as hedging instruments. These derivative contracts relate to transactions in which the Company enters into an interest rate swap with a customer while at the same time entering into an offsetting interest rate swap with another financial institution. In connection with each swap transaction, the Company agrees to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, the Company agrees to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows the Company’s customers to effectively convert a variable rate loan to a fixed rate loan. Because the Company acts as an intermediary for its customers, changes in the fair value of the underlying derivative contracts largely offset each other and do not materially impact results of operations. The Company has entered into interest rate swap contracts that are both over-the-counter, or OTC, and those that are exchanged on futures markets such as the Chicago Mercantile Exchange, or the CME. In the table below, at March 31, 2017 and December 31, 2016 , the OTC derivatives are included in the financial statements at the gross fair value amount of the asset and liability, which represents the change in the fair value of the contract since inception. Effective for the quarter ended March 31, 2017, CME has amended its rulebook to legally characterize variation margin payments, (a payment made based on changes in the fair value of the interest rate swap contracts) as a settlement, referred to as settled-to-market, or STM. As a result of this change, at March 31, 2017 the Company paid cash as STM in the amount of $3,335 for the net fair value of its CME interest rate swap contracts with another financial institution. The variation margin payment changes daily, positively and negatively, based on a change in the fair value of the underlying interest rate swap contracts. The Company does not typically require its commercial customers to post cash or securities as collateral on its program of back-to-back swaps. However, certain language is written into the International Swaps and Derivatives Association agreement and loan documents where, in default situations, the Company is allowed to access collateral supporting the loan relationship to recover any losses suffered on the derivative asset or liability. Summary information as of March 31, 2017 and December 31, 2016 regarding these derivatives is presented below: Notional amount Average maturity (in years) Weighted average fixed rate Weighted average variable rate Fair value March 31, 2017 Included in other assets: Third-party interest rate swap $ 181,122 $ 595 Customer interest rate swap 195,860 1,867 Total $ 376,982 5.46 3.88 % 1 m Libor + 2.26% $ 2,462 Included in other liabilities: Third-party interest rate swap (195,860 ) $ (1,768 ) Customer interest rate swap (181,122 ) (4,029 ) Total $ (376,982 ) 5.46 3.88 1 m Libor + 2.26% $ (5,797 ) December 31, 2016 3rd party interest rate swap 296,282 5.63 3.94 1 m Libor + 2.29% $ 2,088 Customer interest rate swap (296,282 ) 5.63 3.94 1 m Libor + 2.29% (2,088 ) The Company enters into various commitments to sell real estate loans into the secondary market. Such commitments are considered to be derivative financial instruments; however, the fair value of these commitments is not material.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Actual income tax expense differs from the tax computed based on pre-tax income and the applicable statutory Federal tax rate for the following reasons: For the three months ended March 31, 2017 2016 Income before income tax expense $ 56,776 $ 36,009 Tax at Federal statutory rate of 35% 19,872 12,603 State and local income taxes, net of Federal tax benefit 2,274 1,993 Tax-exempt interest, net of disallowed interest (3,484 ) (1,834 ) Bank owned life insurance income (462 ) (445 ) Non-deductible acquisition related costs 342 — Low income housing tax credits (139 ) (54 ) Stock-based compensation benefit (1) (742 ) — Other, net 48 (20 ) Actual income tax expense $ 17,709 $ 12,243 Effective income tax rate 31.2 % 34.0 % (1) See Note 1. “Basis of Financial Statement Presentation” for additional information. Net deferred tax assets totaled $35,502 at March 31, 2017 and $40,548 at December 31, 2016 . No valuation allowance was recorded against deferred tax assets as of those dates, as management believes it is more likely than not that all of the deferred tax assets will be realized because they were supported by recoverable taxes paid in prior years. There were no unrecognized tax benefits during any of the reported periods. Interest and/or penalties related to income taxes are reported as a component of other non-interest expense. Such amounts were not material during the reported periods. The Company is generally no longer subject to examination by Federal, state and local taxing authorities for fiscal years prior to September 30, 2013.

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company has active stock-based compensation plans, as described below. The Company’s stockholders approved the 2015 Omnibus Equity and Incentive Plan (the “2015 Plan”) on May 28, 2015. The 2015 Plan permits the grant of stock options, stock appreciation rights, restricted stock (both time-based and performance-based), restricted stock units, deferred stock and other stock-based awards. The total number of shares that may be awarded under the 2015 Plan is 2,800,000 shares plus the remaining shares available for grant under the stockholder approved 2014 Stock Incentive Plan (the “2014 Plan”) as of the date of adoption of the 2015 Plan. At March 31, 2017 , there were, in aggregate, 3,279,763 shares available for future grant under the 2015 Plan. The Company’s stockholders approved the 2014 Plan on February 20, 2014. The approval of the 2015 Plan resulted in the termination of the 2014 Plan. Awards granted under the 2014 Plan that were outstanding as of May 28, 2015 will continue to be governed by the 2014 Plan document; however no future grants will be made under the 2014 Plan. Under the 2015 Plan, one share is deducted from the 2015 Plan for every share or share underlying the equity award that is awarded and delivered under the 2015 Plan. Restricted stock awards are granted with a fair value equal to the market price of the Company’s common stock at the date of grant. Stock option awards are granted with a strike price that is equal to the market price of the Company’s common stock at the date of grant. The restricted stock awards generally vest in equal installments annually on the anniversary date and have total vesting periods ranging from 1 to 5 years, with stock options having 10 -year contractual terms. In connection with the merger of the Company and Legacy Sterling Bancorp (“Legacy Sterling”) in 2013, the Company granted 104,152 options at an exercise price of $14.25 per share pursuant to a Registration Statement on Form S-8 under which the Company assumed all outstanding fully-vested Legacy Sterling stock options. All options were exercised or expired on March 15, 2017 . The Company also granted 95,991 shares under the Sterling Bancorp 2013 Employment Inducement Award Plan to certain executive officers of Legacy Sterling. In addition, the Company issued 255,973 shares of restricted stock from shares available under a prior plan to certain executives of Legacy Sterling. The weighted average grant date fair value under both of these plans was $11.72 per share, and the restricted stock awards vested in October 2016. The following table summarizes the activity in the Company’s active stock-based compensation plans for the three months ended March 31, 2017 : Non-vested stock awards/stock units outstanding Stock options outstanding Shares available for grant Number of shares Weighted average grant date fair value Number of shares Weighted average exercise price Balance at January 1, 2017 3,639,838 932,223 $ 14.09 1,004,119 $ 11.00 Granted (360,867 ) 360,867 24.28 — — Stock awards vested — (134,226 ) 13.98 — — Exercised — — — (40,253 ) 11.07 Forfeited 1,291 (1,291 ) 13.82 — — Canceled/expired (499 ) — — — — Balance at March 31, 2017 3,279,763 1,157,573 $ 17.28 963,866 $ 10.99 Exercisable at March 31, 2017 846,946 $ 10.67 The total intrinsic value of outstanding in-the-money stock options and outstanding in-the-money exercisable stock options was $ 12,247 and $11,036 , respectively, at March 31, 2017 . The Company uses an option pricing model to estimate the grant date fair value of stock options granted. There were no stock options granted during the three months ended March 31, 2017 or March 31, 2016 . Stock-based compensation expense is recognized ratably over the requisite service period for all awards. Stock-based compensation expense associated with stock options and non-vested stock awards and the related income tax benefit are presented below: For the three months ended March 31, 2017 2016 Stock options $ 50 $ 126 Non-vested stock awards/performance units 1,686 1,414 Total $ 1,736 $ 1,540 Income tax benefit 564 524 Proceeds from stock option exercises 493 546 Unrecognized stock-based compensation expense as of March 31, 2017 was as follows: March 31, 2017 Stock options $ 73 Non-vested stock awards/performance units 15,257 Total $ 15,330 The weighted average period over which unrecognized stock options expense is expected to be recognized is 0.62 years . The weighted average period over which unrecognized non-vested stock awards/performance units expense is expected to be recognized is 1.99 years .

Other Post Retirement Plans

Other Post Retirement Plans	3 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Other Post Retirement Plans	Other Post-Retirement Plans Net other post-retirement expense is comprised of the following for the periods presented below: For the three months ended March 31, 2017 2016 Service cost $ — $ — Interest cost 100 104 Net amortization and deferral 9 12 Total other post-retirement expense $ 109 $ 116 Total other post-retirement expense is included as a component of compensation and benefits in the consolidated income statements. The Company’s other post-retirement plans include non-qualified Supplemental Executive Retirement Plans (“SERP”) that provide certain directors, officers and executives with supplemental retirement benefits. The Company contributed $82 and $30 to fund SERP benefits during the three months ended March 31, 2017 and 2016 , respectively. Total post-retirement plan liabilities were $12,152 and $12,125 at March 31, 2017 and December 31, 2016 , respectively, and are included in other liabilities in the consolidated balance sheets.

Other Non-Interest Expense

Other Non-Interest Expense	3 Months Ended
	Mar. 31, 2017
Other Income and Expenses [Abstract]
Other Non-interest Expense	Other Non-interest Expense Other non-interest expense items for the three months ended March 31, 2017 and 2016 , respectively, are presented in the following table. For the three months ended March 31, 2017 2016 Other non-interest expense: Advertising and promotion $ 551 $ 551 Professional fees 2,205 2,471 Data and check processing 2,469 1,754 Insurance & surety bond premium 537 785 Other 4,407 5,169 Total other non-interest expense $ 10,169 $ 10,730

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The following is a summary of the calculation of earnings per share (“EPS”): For the three months ended March 31, 2017 2016 Net income $ 39,067 $ 23,766 Weighted average common shares outstanding for computation of basic EPS 135,163,347 129,974,025 Common-equivalent shares due to the dilutive effect of stock options and unvested performance share grants (1) 648,374 526,950 Weighted average common shares for computation of diluted EPS 135,811,721 130,500,975 Earnings per common share: Basic $ 0.29 $ 0.18 Diluted 0.29 0.18 Weighted average common shares that could be exercised that were anti-dilutive for the period (2) — — (1) Represents incremental shares computed using the treasury stock method. (2) Anti-dilutive shares are not included in determining diluted earnings per share. There were no anti-dilutive shares in the three months ended March 31, 2017 or 2016.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity (a) Regulatory Capital Requirements Banks and bank holding companies are subject to various regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines, and additionally for banks, prompt corrective action regulations, involve quantitative measures of assets, liabilities, and certain off-balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators about components, risk-weighting, and other factors. The Basel III Capital Rules became effective for the Company and the Bank on January 1, 2015 (subject to a phase-in period for certain provisions). Quantitative measures established by the Basel III Capital Rules to ensure capital adequacy require the maintenance of minimum amounts and ratios (set forth in the table below) of Common Equity Tier 1 capital (as defined in the regulations), Tier 1 capital (as defined in the regulations) and Total capital (as defined in the regulations) to risk-weighted assets (as defined in the regulations, “RWA”), and of Tier 1 capital to adjusted quarterly average assets (as defined in the regulations) (the “Tier 1 leverage ratio”). The Company’s and the Bank’s Common Equity Tier 1 capital consists of common stock and related paid-in capital, net of treasury stock, and retained earnings. In connection with the adoption of the Basel III Capital Rules, we elected to opt-out of the requirement to include most components of accumulated other comprehensive income in Common Equity Tier 1 capital. Common Equity Tier 1 capital for both the Company and the Bank is reduced by goodwill and other intangible assets, net of associated deferred tax liabilities and subject to transition provisions. Tier 1 capital includes Common Equity Tier 1 capital and additional Tier 1 capital. Total capital includes Tier 1 capital and Tier 2 capital. Tier 2 capital (as defined in the regulations) for both the Bank and the Company includes a permissible portion of the allowance for loan losses and $172,553 and $150,944 of the Subordinated Notes, respectively. During the final five years of the term of the Subordinated Notes the permissible portion eligible for inclusion in Tier 2 capital decreases by 20% annually. The Common Equity Tier 1, Tier 1 and Total capital ratios are calculated by dividing the respective capital amounts by RWA. RWA is calculated based on regulatory requirements and includes total assets, excluding goodwill and other intangible assets, allocated by risk weight category, and certain off-balance-sheet items, among other items. The Tier 1 leverage ratio is calculated by dividing Tier 1 capital by adjusted quarterly average total assets, which excludes goodwill and other intangible assets, among other items. When fully phased-in on January 1, 2019, the Basel III Capital Rules will require the Company and the Bank to maintain: (i) a minimum ratio of Common Equity Tier 1 capital to RWA of at least 4.5%, plus a 2.5% “capital conservation buffer” (which is added to the 4.5% Common Equity Tier 1 capital ratio as that buffer is phased in, effectively resulting in a minimum ratio of Common Equity Tier 1 capital to RWA of at least 7.0% upon full implementation); (ii) a minimum ratio of Tier 1 capital to RWA of at least 6.0%, plus the capital conservation buffer (which is added to the 6.0% Tier 1 capital ratio as that buffer is phased in, effectively resulting in a minimum Tier 1 capital ratio of 8.5% upon full implementation); (iii) a minimum ratio of Total capital (that is, Tier 1 plus Tier 2) to RWA of at least 8.0%, plus the capital conservation buffer (which is added to the 8.0% total capital ratio as that buffer is phased in, effectively resulting in a minimum total capital ratio of 10.5% upon full implementation); and (iv) a minimum Tier 1 leverage ratio of 4.0%. The implementation of the capital conservation buffer began on January 1, 2016 at the 0.625% level and effective January 1, 2017 increased to the 1.25% level and will be phased-in over a four-year period (increasing by 0.625% on each subsequent January 1, until it reaches 2.5% on January 1, 2019). The Basel III Capital Rules also provide for a “countercyclical capital buffer” that is applicable to only certain covered institutions and does not have any current applicability to the Company or the Bank. The aforementioned capital conservation buffer is designed to absorb losses during periods of economic stress. Banking institutions with a ratio of Common Equity Tier 1 capital to RWA above the minimum but below the conservation buffer (or below the combined capital conservation buffer and countercyclical capital buffer, when the latter is applied) will face constraints on dividends, equity repurchases and compensation based on the amount of the shortfall. The following tables present actual and required capital ratios as of March 31, 2017 and December 31, 2016 for the Company and the Bank under the Basel III Capital Rules. The minimum required capital amounts presented include the minimum required capital levels as of March 31, 2017 and December 31, 2016 based on the phase-in provisions of the Basel III Capital Rules and the minimum required capital levels as of January 1, 2019 when the Basel III Capital Rules have been fully phased-in. Capital levels required to be considered well-capitalized are based upon prompt corrective action regulations, as amended to reflect the changes under the Basel III Capital Rules. Actual Minimum capital required - Basel III phase-in schedule Minimum capital required - Basel III fully phased-in Required to be considered well- capitalized Capital amount Ratio Capital amount Ratio Capital amount Ratio Capital amount Ratio March 31, 2017 Common equity tier 1 to RWA: Sterling National Bank $ 1,197,463 10.79 % $ 638,196 5.75 % $ 776,934 7.00 % $ 721,439 6.50 % Sterling Bancorp 1,184,294 10.67 637,994 5.75 776,689 7.00 N/A N/A Tier 1 capital to RWA: Sterling National Bank 1,197,463 10.79 % 804,681 7.25 % 943,420 8.50 % 887,924 8.00 % Sterling Bancorp 1,184,294 10.67 804,428 7.25 943,122 8.50 N/A N/A Total capital to RWA: Sterling National Bank 1,437,500 12.95 % 1,026,662 9.25 % 1,165,401 10.50 % 1,109,905 10.00 % Sterling Bancorp 1,404,613 12.66 1,026,339 9.25 1,165,033 10.50 N/A N/A Tier 1 leverage ratio: Sterling National Bank 1,197,463 8.99 532,938 4.00 % 532,938 4.00 % 666,172 5.00 % Sterling Bancorp 1,184,294 8.89 532,911 4.00 532,911 4.00 N/A N/A Actual Minimum capital required - Basel III phase-in schedule Minimum capital required - Basel III fully phased-in Required to be considered well- capitalized Capital amount Ratio Capital amount Ratio Capital amount Ratio Capital amount Ratio December 31, 2016 Common equity tier 1 to RWA: Sterling National Bank $ 1,176,497 10.87 % $ 554,663 5.125 % $ 757,588 7.00 % $ 703,475 6.50 % Sterling Bancorp 1,160,739 10.73 554,474 5.125 757,330 7.00 N/A N/A Tier 1 capital to RWA: Sterling National Bank 1,176,497 10.87 % 717,003 6.625 % 919,928 8.50 % 865,815 8.00 % Sterling Bancorp 1,160,739 10.73 716,759 6.625 919,615 8.50 N/A N/A Total capital to RWA: Sterling National Bank 1,413,165 13.06 % 933,457 8.625 % 1,136,382 10.50 % 1,082,269 10.00 % Sterling Bancorp 1,377,547 12.73 933,139 8.625 1,135,995 10.50 N/A N/A Tier 1 leverage ratio: Sterling National Bank 1,176,497 9.08 % 518,308 4.000 % 518,308 4.00 % 647,885 5.00 % Sterling Bancorp 1,160,739 8.95 518,733 4.000 518,733 4.00 N/A N/A The Bank and the Company are subject to the regulatory capital requirements administered by the Federal Reserve, and, for the Bank, the Office of the Comptroller of the Currency. Regulatory authorities can initiate certain mandatory actions if the Bank or the Company fail to meet the minimum capital requirements, which could have a direct material effect on our financial statements. As of March 31, 2017 , management believes that the Bank and the Company meet all capital adequacy requirements to which they are subject. (b) Dividend Restrictions The Company is mainly dependent upon dividends from the Bank to provide funds for the payment of dividends to stockholders and to provide for other cash requirements. Banking regulations may limit the amount of dividends that may be paid. Approval by regulatory authorities is required if the effect of dividends declared would cause the regulatory capital of the Bank to fall below specified minimum levels. Approval is also required if dividends declared exceed the net profits for that fiscal year combined with the retained net profits for the preceding two fiscal years. Under the foregoing dividend restrictions and while maintaining its “well-capitalized” status, at March 31, 2017 , the Bank had capacity to pay aggregate dividends of up to $145,016 to the Company without prior regulatory approval. (c) Capital Raise On November 22, 2016 , the Company completed a public offering of 4,370,000 shares of common stock at an offering price of $20.95 per share for gross proceeds of approximately $92,863 , and net proceeds, after underwriting discounts, commissions and other costs of issuance, of $90,995 . (d) Stock Repurchase Plans From time to time, the Company’s Board of Directors has authorized stock repurchase plans. The Company has 776,713 shares that are available to be purchased under a previously announced stock repurchase program. There were no shares repurchased under the repurchase program during the three months ended March 31, 2017 or March 31, 2016 . (e) Liquidation Rights Upon completion of a second-step conversion in January 2004 , the Bank established a special “liquidation account” in accordance with Office of the Comptroller of the Currency regulations. The account was established for the benefit of Eligible Account Holders and Supplemental Eligible Account Holders (as defined in the plan of conversion) in an amount equal to the greater of (i) the Mutual Holding Company’s (as defined in the plan of conversion) ownership interest in the retained earnings of the Bank as of the date of its latest balance sheet contained in the prospectus; or (ii) the retained earnings of the Bank at the time that the Bank reorganized into the Mutual Holding Company in 1999. Each Eligible Account Holder and Supplemental Eligible Account Holder that continues to maintain his or her deposit account at the Bank would be entitled, in the event of a complete liquidation of the Bank, to a pro rata interest in the liquidation account prior to any payment to the stockholders of the Company. The liquidation account is reduced annually on September 30 to the extent that Eligible Account Holders and Supplemental Eligible Account Holders have reduced their qualifying deposits as of each anniversary date. At March 31, 2017 , the liquidation account had a balance of $13,300 . Subsequent increases in deposits do not restore such account holder’s interest in the liquidation account. The Bank may not pay cash dividends or make other capital distributions if the effect thereof would reduce its stockholders’ equity below the amount of the liquidation account.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies (a) Off-Balance Sheet Financial Instruments In the normal course of business, the Company enters into various transactions, which, in accordance with GAAP, are not included in its consolidated balance sheet. The Company enters into these transactions to meet the financing needs of its customers. These transactions include commitments to extend credit and standby letters of credit, which involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amounts recognized in the consolidated balance sheets. The Company minimizes its exposure to losses under these commitments by subjecting them to credit approval and monitoring procedures. The Company enters into contractual commitments to extend credit, normally with fixed expiration dates or termination clauses, at specified rates and for specific purposes. Substantially all of the Company’s commitments to extend credit are contingent upon customers maintaining specific credit standards at the time of loan funding. Standby letters of credit are written conditional commitments issued by the Company to guarantee the performance of a customer to a third-party. In the event the customer does not perform in accordance with the terms of the agreement with the third-party, the Company would be required to fund the commitment. The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount of the commitment. If the commitment were funded, the Company would be entitled to seek recovery from the customer. Based on the Company’s credit risk exposure assessment of its standby letter of credit arrangements, the arrangements contain security and debt covenants similar to those contained in loan agreements. The contractual or notional amounts of these instruments, which reflect the extent of the Company’s involvement in particular classes of off-balance sheet financial instruments, are summarized as follows: March 31, December 31, 2017 2016 Loan origination commitments $ 282,661 $ 245,319 Unused lines of credit 999,537 968,288 Letters of credit 115,163 114,582 (b) Lease Commitments The Company leases certain premises and equipment under operating leases with terms expiring through January 2034. Included in occupancy and office operations expense was net rent expense of $2,250 and $3,522 during the three months ended March 31, 2017 and 2016 , respectively. Future minimum lease payments due under non-cancelable operating leases at March 31, 2017 were as follows: Remainder of 2017 $ 7,956 2018 10,237 2019 8,693 2020 7,790 2021 6,355 2022 5,229 2023 and thereafter 16,272 $ 62,532 (c) Litigation The Company and the Bank are involved in a number of judicial proceedings concerning matters arising from their business activities. These include routine legal proceedings arising in the ordinary course of business. These proceedings also include actions brought against the Company and the Bank with respect to corporate matters and transactions in which the Company and the Bank are or were involved; in particular, the Company has been named as a defendant in shareholder litigation arising out of the announcement of the Astoria Merger. The Company believes that such claims are without merit. In addition, the Company and the Bank may be requested to provide information or otherwise cooperate with government authorities in the conduct of investigations of other persons or industry groups. There can be no assurance as to the ultimate outcome of a legal proceeding; however, the Company and the Bank have generally denied liability in all significant litigation pending against them and intend to defend vigorously each case, other than matters that are determined appropriate to be settled. The Company and the Bank accrue a liability for legal claims when payments associated with the claims become probable and the costs can be reasonably estimated. The actual costs of resolving legal claims may be substantially higher or lower than the amounts accrued for those claims.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair value measurements	Fair Value Measurements Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values: Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets and 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 might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risk, etc.) or inputs that are derived principally from, or corroborated by, market data by correlation or other means. Level 3 Inputs – Unobservable inputs for determining the fair value of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. In general, fair value is based on quoted market prices, when available. If quoted market prices in active markets are not available, fair value is based on internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Company’s creditworthiness, among other items, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. The Company’s valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Furthermore, the reported fair value amounts have not been comprehensively revalued since the presentation dates; therefore, estimates of fair value after the balance sheet date may differ significantly from the amounts presented herein. A more detailed description of the valuation methodologies used for assets and liabilities measured at fair value is set forth below. Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer, which usually coincide with the Company’s monthly and/or quarterly valuation process. Investment Securities Available for Sale The majority of the Company’s available for sale investment securities are reported at fair value utilizing Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the securities’ terms and conditions, among other things. The Company reviews the prices supplied by the independent pricing service, as well as their underlying pricing methodologies, for reasonableness and to ensure such prices are aligned with traditional pricing matrices. In general, the Company does not purchase investment securities that have a complicated structure. The Company’s entire portfolio consists of traditional investments, nearly all of which are mortgage pass-through securities, state and municipal general obligation or revenue bonds, U.S. agency bullet and callable securities and corporate bonds. Pricing for such instruments is fairly generic and is easily obtained. From time to time, the Company validates, on a sample basis, prices supplied by the independent pricing service by comparison to prices obtained from third-party sources or derived using internal models. As of March 31, 2017 , management does not believe any of our securities are OTTI; however, management reviews all of the Company’s securities on at least a quarterly basis to assess whether impairment, if any, is OTTI. Derivatives The fair values of derivatives are based on valuation models using current market terms (including interest rates and fees), the remaining terms of the agreements, and the creditworthiness of the counterparty as of the measurement date (Level 2 inputs). The Company’s derivatives consist of interest rate swaps. See Note 9. “Derivatives” for additional information. A summary of such investment securities available for sale and derivatives at March 31, 2017 and December 31, 2016 , respectively, were measured at estimated fair value on a recurring basis, is as follows: March 31, 2017 Fair value Level 1 inputs Level 2 inputs Level 3 inputs Assets: Investment securities available for sale: Residential MBS (1) : Agency-backed $ 1,381,999 $ — $ 1,381,999 $ — CMO (2) /Other MBS 53,153 — 53,153 — Total residential MBS 1,435,152 — 1,435,152 — Other securities: Federal agencies 189,130 — 189,130 — Corporate 61,047 — 61,047 — State and municipal 256,342 — 256,342 — Total other securities 506,519 — 506,519 — Total available for sale securities 1,941,671 — 1,941,671 — Swaps 2,462 — 2,462 — Total assets $ 1,944,133 $ — $ 1,944,133 $ — Liabilities: Swaps $ (5,797 ) $ — $ (5,797 ) $ — Total liabilities $ (5,797 ) $ — $ (5,797 ) $ — (1) Residential MBS are debt securities whose cash flows come from residential loans, such as mortgages and HELOCs. A residential MBS is comprised of a pool of mortgage loans created by financial institutions including governmental agencies. The cash flows from each of the mortgage loans included in the pool are structured through a special purpose entity into various classes and tranches, which then issue securities backed by those cash flows to investors. (2) CMOs are debt securities that are collateralized by a specific pool of residential mortgage loans, in which the issuer of the CMOs can direct the payments of principal and interest received on the underlying collateral to achieve specific investor cash flow objectives. The Bank generally acquires planned-amortization class securities and CMOs with a sequential pay structure in order to manage the duration and extension risk inherent in these securities. December 31, 2016 Fair value Level 1 inputs Level 2 inputs Level 3 inputs Assets: Investment securities available for sale: Residential MBS: Agency-backed $ 1,193,481 $ — $ 1,193,481 $ — CMO/Other MBS 56,681 — 56,681 — Total residential MBS 1,250,162 — 1,250,162 — Federal agencies 193,979 — 193,979 — Corporate bonds 42,506 — 42,506 — State and municipal 240,770 — 240,770 — Total investment securities available for sale 477,255 — 477,255 — Total available for sale securities 1,727,417 — 1,727,417 — Swaps 2,088 — 2,088 — Total assets $ 1,729,505 $ — $ 1,729,505 $ — Liabilities: Swaps $ (2,088 ) $ — $ (2,088 ) $ — Total liabilities $ (2,088 ) $ — $ (2,088 ) $ — The following categories of financial assets are not measured at fair value on a recurring basis, but are subject to fair value adjustments in certain circumstances. Impaired Loans Loans that meet certain criteria are evaluated individually for impairment. Generally, commercial loans less than $250 and residential loans less than $500 are evaluated for impairment on a pooled basis. Impairment amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated impairment amount applicable to that loan does not necessarily represent the fair value of the loan. Real estate collateral is valued using independent appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable by market participants. However, due to the substantial judgment applied and limited volume of activity as compared to other assets, fair value of the underlying collateral is based on Level 3 inputs. Estimates of fair value used for collateral supporting commercial loans generally are based on assumptions not observable in the market place and are also based on Level 3 inputs. Impaired loans are evaluated on at least a quarterly basis for additional impairment and their carrying values are adjusted as needed. Impaired loans subject to non-recurring fair value measurements were $54,707 and $55,391 at March 31, 2017 and December 31, 2016 , respectively. Changes in fair value recognized as a charge-off on loans held by the Company were $0 and $0 for the three months ended March 31, 2017 and 2016 , respectively. When an impaired loan is collateral dependent, the Company charges-off the difference between the recorded investment in the loan and the appraised value less cost to sell. A discount for estimated costs to dispose of the asset and overall marketability is used when estimating the amount of impairment. A summary of the class with impaired loans at March 31, 2017 and December 31, 2016 , respectively, is set forth below: March 31, 2017 Fair value Level 1 inputs Level 2 inputs Level 3 inputs C&I $ 177 $ — $ — $ 177 Commercial real estate 6,454 — — 6,454 Total impaired loans measured at fair value $ 6,631 $ — $ — $ 6,631 December 31, 2016 Fair value Level 1 inputs Level 2 inputs Level 3 inputs Commercial real estate $ 6,786 $ — $ — $ 6,786 Total impaired loans measured at fair value $ 6,786 $ — $ — $ 6,786 Mortgage Servicing Rights Mortgage servicing rights are carried at the lower of cost or estimated fair value. The fair value of mortgage servicing rights is estimated using a discounted cash flow model that is prepared by an independent third-party valuation provider. The estimated fair value is performed on a quarterly basis. The significant assumptions, which are assumptions we believe other market participants would use, include the following: market discount rates, prepayment speeds, servicing revenue, the cost of servicing and loan default rates. The market discount rates and prepayment speeds are considered by management to be two of the most significant inputs into the determination of the estimated fair value. Due to the significant judgment involved, the determination of estimated fair value of mortgage servicing rights relies upon Level 3 inputs. At March 31, 2017 , the assumption for prepayment speeds ranged from 100 to 425 with a weighted average prepayment speed of 167 and the assumption for market discount rate ranged from 8.75% to 11.75% with a weighted average market discount rate of 10.00% . At December 31, 2016 , the assumption for prepayment speeds ranged from 100 to 555 with a weighted average prepayment speed of 174 and the assumption for market discount rate ranged from 8.50% to 11.50% with a weighted average market discount rate of 9.73% . The fair value of mortgage servicing rights at March 31, 2017 and December 31, 2016 was $1,009 and $1,024 , respectively. Other Real Estate Owned Other real estate owned is initially recorded at fair value less costs to sell when acquired, which establishes a new cost basis. When an asset is acquired, the excess of the recorded investment in the loan over the fair value less cost to sell is charged to the allowance for loan losses. These assets are subsequently accounted for at the lower of cost or fair value less costs to sell and are primarily comprised of commercial and residential real estate property. If the fair value declines, a write-down is recorded in other real estate owned expense, net on the income statement. Fair value is generally determined using appraisals or other indications of value based on comparable sales of similar properties or assumptions generally observable in the marketplace. Adjustments are routinely made in the appraisal process by independent appraisers for differences between comparable sales and income data available. The fair value is derived using Level 3 inputs. Appraisals are reviewed by the Company’s credit department and an external loan review consultant and verified by officers in the Company’s credit administration area. At March 31, 2017 and December 31, 2016 , appraisals were discounted by 22.0% , which considers estimated costs to sell and overall marketability of the properties. Other real estate owned subject to non-recurring fair value measurement were $9,632 and $13,619 at March 31, 2017 and December 31, 2016 , respectively. There were $1,293 and $165 of write-downs related to changes in fair value for other real estate owned held by the Company during the three months ended March 31, 2017 and March 31, 2016 , respectively. Fair Value of Financial Instruments Fair values for financial instruments must be estimated by management using techniques such as discounted cash flow analysis and comparison to similar instruments. These estimates are highly subjective and require judgments regarding significant matters, such as the amount and timing of future cash flows and the selection of discount rates that appropriately reflect market and credit risks. Changes in these judgments often have a material effect on the fair value estimates. Since these estimates are made as of a specific point in time, they are susceptible to material near-term changes. Fair values disclosed in accordance with FASB ASC Topic 825 do not reflect any premium or discount that could result from the sale of a large volume of a particular financial instrument, nor do they reflect possible tax ramifications or estimated transaction costs. The following is a summary of the carrying amounts and estimated fair value of financial assets and liabilities (none of which were held for trading purposes) as of March 31, 2017 : March 31, 2017 Carrying amount Level 1 inputs Level 2 inputs Level 3 inputs Financial assets: Cash and cash equivalents $ 253,703 $ 253,703 $ — $ — Securities available for sale 1,941,671 — 1,941,671 — Securities held to maturity 1,474,724 — 1,447,317 — Loans held for sale 2,559 — 2,559 — Portfolio loans, net 9,697,028 — — 9,693,553 Accrued interest receivable on securities 20,816 — 20,816 — Accrued interest receivable on loans 28,158 — — 28,158 FHLB stock and FRB stock 148,030 — — — Swaps 2,462 — 2,462 — Financial liabilities: Non-maturity deposits (9,705,163 ) (9,705,163 ) — — Certificates of deposit (546,562 ) — (544,843 ) — FHLB borrowings (2,035,000 ) — (2,031,918 ) — Other borrowings (44,472 ) — (44,472 ) — Senior Notes (76,551 ) — (80,244 ) — Subordinated Notes (172,553 ) — (175,113 ) — Mortgage escrow funds (13,153 ) — (13,153 ) — Accrued interest payable on deposits (598 ) — (598 ) — Accrued interest payable on borrowings (7,527 ) — (7,527 ) — Swaps (5,797 ) — (5,797 ) — The following is a summary of the carrying amounts and estimated fair value of financial assets and liabilities (none of which were held for trading purposes) as of December 31, 2016 : December 31, 2016 Carrying amount Level 1 inputs Level 2 inputs Level 3 inputs Financial assets: Cash and cash equivalents $ 293,646 $ 293,646 $ — $ — Securities available for sale 1,727,417 — 1,727,417 — Securities held to maturity 1,391,421 — 1,357,997 — Loans held for sale 41,889 — 41,889 — Portfolio loans, net 9,463,608 — — 9,461,469 Accrued interest receivable on securities 16,495 — 16,495 — Accrued interest receivable on loans 26,824 — — 26,824 FHLB stock and FRB stock 135,098 — — — Swaps 2,088 — 2,088 — Financial liabilities: Non-maturity deposits (9,484,505 ) (9,484,505 ) — — Certificates of deposit (583,754 ) — (582,811 ) — FHLB borrowings (1,791,000 ) — (1,788,676 ) — Other borrowings (16,642 ) — (16,642 ) — Senior Notes (76,469 ) — (79,283 ) — Subordinated Notes (172,501 ) — (169,813 ) — Mortgage escrow funds (13,572 ) — (13,572 ) — Accrued interest payable on deposits (663 ) — (663 ) — Accrued interest payable on borrowings (3,621 ) — (3,621 ) — Swaps (2,088 ) — (2,088 ) — The following paragraphs summarize the principal methods and assumptions used by the Company to estimate the fair value of the Company’s financial instruments: Loans The estimated fair value approximates the carrying value for variable-rate loans that reprice frequently with no significant change in credit risk. The fair value of fixed-rate loans and variable-rate loans which reprice on an infrequent basis is estimated by discounting future cash flows using the current interest rates at which similar loans with similar terms would be made to borrowers of similar credit quality. An overall valuation adjustment is made for specific credit risks, as well as general portfolio credit risk. FHLB Stock and FRB Stock The redeemable carrying amount of these securities with limited marketability approximates their fair value. Deposits and Mortgage Escrow Funds Deposits with no stated maturity (such as demand, money market and savings deposits) are assigned fair values equal to the carrying amounts payable on demand. Certificates of deposit and mortgage escrow funds are segregated by account type and original term, and fair values are estimated by discounting the contractual cash flows. The discount rate for each account grouping is equivalent to the current market rates for deposits of similar type and maturity. These fair values do not include the value of core deposit relationships that comprise a significant portion of the Company’s deposits. We believe that the Company’s core deposit relationships provide a relatively stable, low-cost funding source that has a substantial value separate from the deposit balances. FHLB Borrowings, Other Borrowings, Senior Notes and Subordinated Notes The estimated fair value approximates the carrying value for short-term borrowings. The fair value of long-term fixed-rate borrowings is estimated using quoted market prices, if available, or by discounting future cash flows using current interest rates for similar financial instruments. Other Financial Instruments Other financial assets and liabilities listed in the tables above have estimated fair values that approximate their respective carrying amounts because the instruments are payable on demand or have short-term maturities and present relatively low credit risk and interest rate risk. The fair values of the Company’s off-balance sheet financial instruments described in the “Off-Balance Sheet Financial Instruments” section of Note 16. “Commitments and Contingencies” were estimated based on current market terms (including interest rates and fees), considering the remaining terms of the agreements and the creditworthiness of the counterparties. At March 31, 2017 and December 31, 2016 , the estimated fair value of these instruments approximated the related carrying amounts, which were not material. Accrued Interest Receivable/Payable The carrying amounts of accrued interest approximate fair value and are classified in accordance with the related instrument.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Components of accumulated other comprehensive income (loss) (“AOCI”) were as follows as of the dates shown below: March 31, December 31, 2017 2016 Net unrealized holding loss on available for sale securities $ (32,899 ) $ (37,417 ) Related income tax benefit 12,995 14,780 Available for sale securities AOCI, net of tax (19,904 ) (22,637 ) Net unrealized holding loss on securities transferred to held to maturity (5,152 ) (5,395 ) Related income tax benefit 2,035 2,131 Securities transferred to held to maturity AOCI, net of tax (3,117 ) (3,264 ) Net unrealized holding loss on retirement plans (1,157 ) (1,213 ) Related income tax benefit 457 479 Retirement plans AOCI, net of tax (700 ) (734 ) AOCI $ (23,721 ) $ (26,635 ) The following table presents the changes in each component of AOCI for the three months ended March 31, 2017 and 2016 : Net unrealized holding gain (loss) on available for sale securities Net unrealized holding gain (loss) on securities transferred to held to maturity Net unrealized holding (loss) gain on retirement plans Total For the three months ended March 31, 2017 Balance beginning of the period $ (22,637 ) $ (3,264 ) $ (734 ) $ (26,635 ) Other comprehensive gain before reclassification 2,747 — — 2,747 Amounts reclassified from AOCI (14 ) 147 34 167 Total other comprehensive income 2,733 147 34 2,914 Balance at end of period $ (19,904 ) $ (3,117 ) $ (700 ) $ (23,721 ) For the three months ended March 31, 2016 Balance beginning of the period $ (6,999 ) $ (4,155 ) $ (970 ) $ (12,124 ) Other comprehensive gain before reclassification 16,285 — — 16,285 Amounts reclassified from AOCI (171 ) (45 ) 214 (2 ) Total other comprehensive income 16,114 (45 ) 214 16,283 Balance at end of period $ 9,115 $ (4,200 ) $ (756 ) $ 4,159 Location in income statement where reclassification from AOCI is included Net (loss) on sale of securities Interest income on securities Compensation and benefits expense

Recent Accounting Standards, No

Recent Accounting Standards, Not Yet Adopted	3 Months Ended
	Mar. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Recently Issued Accounting Standards Not Yet Adopted	Recently Issued Accounting Standards Not Yet Adopted ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU 2014-09 implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should apply the following steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. This standard is effective for the Company on January 1, 2018. Our revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income, which is subject to ASU 2014-09. Although management continues to evaluate the potential impact of ASU 2014-09 on our consolidated financial statements at this time we believe the adoption of this standard will not have a significant impact to the Company’s consolidated financial statements. ASU 2016-01, “Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01, among other things: (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income; (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (iii) 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; (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (v) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements; and (vii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale. ASU 2016-01 will be effective for the Company on January 1, 2018 and is not expected to have a significant impact on its financial statements. ASU 2016-02, “Leases (Topic 842).” ASU 2016-02 amends existing lease accounting guidance, including the requirement to recognize most lease arrangements on the balance sheet. The adoption of this standard will result in the Company recognizing a right-of-use asset representing its rights to use the underlying asset for the lease term with an offsetting lease liability. ASU 2016-02 will be effective for for the company on January 1, 2019, with early adoption permitted and will require transition using a modified retrospective approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company has not yet concluded whether it will adopt the standard prior to January 1, 2019; however, if the standard were effective at March 31, 2017, it would not have had an impact on any borrowings or covenants that are relevant to the Company and management estimates that the impact to the Bank’s and the Company’s regulatory capital ratios would be less than five basis points. ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 amends current guidance on the impairment of financial instruments. ASU 2016-13 adds an impairment model known as the current expected credit loss (“CECL”) model that is based on expected losses rather than incurred losses. For the Company, the CECL model will apply mainly to held-to-maturity investment securities, loans and loan commitments. ASU 2016-13 will be effective for the Company for fiscal years beginning after December 15, 2019, and the Company is permitted to early adopt the new guidance for fiscal years beginning after December 15, 2018. ASU 2016-13 will significantly change the accounting for credit impairment. The new guidance will require the Company to modify current processes and systems for establishing the allowance for loan losses and OTTI to ensure they comply with the requirements of the new standard. As as result, the Company has engaged a nationally recognized accounting firm to advise and assist management in performing an implementation readiness assessment and adopt the standard. During the first quarter of 2017, the Company, in conjunction with our vendor, established a steering committee, assigned roles and responsibilities, identified significant work streams and created a project timeline. ASU 2016-15, “Statement of Cash Flows (Topic 230) - Classification of Certain Cash Receipts and Cash Payments.” ASU 2016-15 provides guidance related to certain cash flow issues in order to reduce the current and potential future diversity in practice. ASU 2016-15 will be effective for the Company on January 1, 2018 and is not expected to have a significant impact on its financial statements. ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” ASU 2017-04 eliminates the second step in the goodwill impairment test which requires an entity to determine the implied fair value of the reporting unit’s goodwill. Instead, an entity should recognize an impairment loss if the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, with the impairment loss not to exceed the amount of goodwill allocated to the reporting unit. The standard will be effective for the Company beginning January 1, 2020, with early adoption permitted for goodwill impairment tests preformed after January 1, 2017. The Company expects to early adopt upon the next goodwill impairment test in 2017. ASU 2017-04 is not expected to have a significant impact on the Company’s financial statements. ASU 2017-08, “Premium Amortization on Purchased Callable Debt Securities.” ASU 2017-08 shortens the amortization period for the premium on certain purchased callable debt securities to the earliest call date. Today, entities generally amortize the premium over the contractual life of the security. The new guidance does not change the accounting for purchased callable debt securities held at a discount; the discount continues to be amortized to maturity. ASU No. 2017-08 is effective for interim and annual reporting periods beginning after December 15, 2018; early adoption is permitted. The guidance calls for a modified retrospective transition approach under which a cumulative-effect adjustment will be made to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The Company adopted this ASU 2017-08 effective January 1, 2017 and the impact of adoption did not have a significant impact on its financial statements.

Pending Merger with Astoria Fin

Pending Merger with Astoria Financial Corporation	3 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Pending Merger with Astoria Financial Corporation	Pending Merger with Astoria Financial Corporation On March 7, 2017 , the Company announced it had entered into a definitive merger agreement with Astoria Financial Corporation (NYSE: AF) (“Astoria”). In the definitive merger agreement, which is an agreement for a stock-for-stock transaction valued at approximately $2,233,873 based on the closing price of the Company’s common stock on March 6, 2017 , Astoria shareholders will receive a fixed ratio of 0.875 shares of Company common stock for each share of Astoria common stock. Upon closing, Company shareholders will own approximately 60% of stock in the combined company and Astoria shareholders will own approximately 40% . Proforma information for the year ended December 31, 2016 was as follows: For the year ended December 31, 2016 Pro Forma Condensed Income Statement Information: Net interest income $ 818,907 Provision for loan losses 10,849 Income before income taxes 385,185 Net income 251,173 Pro Forma Condensed Combined Balance Sheet Information: Portfolio loans, net 19,530,795 Total assets 29,510,290 Deposits 18,956,004 Total stockholders’ equity 4,218,852 The transaction is expected to close in the fourth quarter of 2017. The transaction is subject to approval by shareholders from both companies, regulatory approval and other customary closing conditions. The Company has engaged an independent third-party to assist management in estimating the fair value of the majority of the assets acquired and liabilities to be assumed. On April 5, 2017, the Company filed a registration statement on Form S-4 that included historical and pro forma information regarding Astoria and the Company, which is required in connection with the merger.

Basis of Financial Statement 29

Basis of Financial Statement Presentation (Policies)	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements in this Quarterly Report on Form 10-Q include the accounts of the Company and all other entities in which the Company has a controlling financial interest. All significant intercompany balances and transactions have been eliminated in consolidation. The accounting and financial reporting policies the Company follows conform, in all material respects, to accounting principles generally accepted in the United States (“GAAP”) and to general practices within the banking industry, which include regulatory reporting instructions. The consolidated financial statements in this Quarterly Report on Form 10-Q have not been audited by an independent registered public accounting firm, but, in the opinion of management, reflect all adjustments necessary for a fair presentation of the Company’s financial position and results of operations. All such adjustments were of a normal and recurring nature. The consolidated financial statements have been prepared in accordance with GAAP and with the instructions to Form 10-Q adopted by the Securities and Exchange Commission (the “SEC”). Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our consolidated financial statements, and notes thereto, for the year ended December 31, 2016 , included in our Annual Report on Form 10-K, as filed with the SEC on February 27, 2017 (the “2016 Form 10-K”). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period. Certain items in prior financial statements have been reclassified to conform to the current presentation. These reclassifications had no impact on previously reported net income.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, income, expense and contingencies at the date of the financial statements. Actual results could differ significantly from these estimates, particularly the allowance for loan losses and the status of contingencies, are subject to change.
Recently Issued Accounting Standards Not Yet Adopted	Recently Issued Accounting Standards Not Yet Adopted ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU 2014-09 implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should apply the following steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. This standard is effective for the Company on January 1, 2018. Our revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income, which is subject to ASU 2014-09. Although management continues to evaluate the potential impact of ASU 2014-09 on our consolidated financial statements at this time we believe the adoption of this standard will not have a significant impact to the Company’s consolidated financial statements. ASU 2016-01, “Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01, among other things: (i) requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income; (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (iii) 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; (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (v) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements; and (vii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale. ASU 2016-01 will be effective for the Company on January 1, 2018 and is not expected to have a significant impact on its financial statements. ASU 2016-02, “Leases (Topic 842).” ASU 2016-02 amends existing lease accounting guidance, including the requirement to recognize most lease arrangements on the balance sheet. The adoption of this standard will result in the Company recognizing a right-of-use asset representing its rights to use the underlying asset for the lease term with an offsetting lease liability. ASU 2016-02 will be effective for for the company on January 1, 2019, with early adoption permitted and will require transition using a modified retrospective approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company has not yet concluded whether it will adopt the standard prior to January 1, 2019; however, if the standard were effective at March 31, 2017, it would not have had an impact on any borrowings or covenants that are relevant to the Company and management estimates that the impact to the Bank’s and the Company’s regulatory capital ratios would be less than five basis points. ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 amends current guidance on the impairment of financial instruments. ASU 2016-13 adds an impairment model known as the current expected credit loss (“CECL”) model that is based on expected losses rather than incurred losses. For the Company, the CECL model will apply mainly to held-to-maturity investment securities, loans and loan commitments. ASU 2016-13 will be effective for the Company for fiscal years beginning after December 15, 2019, and the Company is permitted to early adopt the new guidance for fiscal years beginning after December 15, 2018. ASU 2016-13 will significantly change the accounting for credit impairment. The new guidance will require the Company to modify current processes and systems for establishing the allowance for loan losses and OTTI to ensure they comply with the requirements of the new standard. As as result, the Company has engaged a nationally recognized accounting firm to advise and assist management in performing an implementation readiness assessment and adopt the standard. During the first quarter of 2017, the Company, in conjunction with our vendor, established a steering committee, assigned roles and responsibilities, identified significant work streams and created a project timeline. ASU 2016-15, “Statement of Cash Flows (Topic 230) - Classification of Certain Cash Receipts and Cash Payments.” ASU 2016-15 provides guidance related to certain cash flow issues in order to reduce the current and potential future diversity in practice. ASU 2016-15 will be effective for the Company on January 1, 2018 and is not expected to have a significant impact on its financial statements. ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” ASU 2017-04 eliminates the second step in the goodwill impairment test which requires an entity to determine the implied fair value of the reporting unit’s goodwill. Instead, an entity should recognize an impairment loss if the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, with the impairment loss not to exceed the amount of goodwill allocated to the reporting unit. The standard will be effective for the Company beginning January 1, 2020, with early adoption permitted for goodwill impairment tests preformed after January 1, 2017. The Company expects to early adopt upon the next goodwill impairment test in 2017. ASU 2017-04 is not expected to have a significant impact on the Company’s financial statements. ASU 2017-08, “Premium Amortization on Purchased Callable Debt Securities.” ASU 2017-08 shortens the amortization period for the premium on certain purchased callable debt securities to the earliest call date. Today, entities generally amortize the premium over the contractual life of the security. The new guidance does not change the accounting for purchased callable debt securities held at a discount; the discount continues to be amortized to maturity. ASU No. 2017-08 is effective for interim and annual reporting periods beginning after December 15, 2018; early adoption is permitted. The guidance calls for a modified retrospective transition approach under which a cumulative-effect adjustment will be made to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The Company adopted this ASU 2017-08 effective January 1, 2017 and the impact of adoption did not have a significant impact on its financial statements.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Summary of securities available for sale	A summary of amortized cost and estimated fair value of securities as of March 31, 2017 and December 31, 2016 is presented below. The term “MBS” refers to mortgage-backed securities and the term “CMO” refers to collateralized mortgage obligations. Both of these terms are further defined in Note 17. “Fair Value Measurements”. March 31, 2017 Available for Sale Held to Maturity Amortized cost Gross unrealized gains Gross unrealized losses Fair value Amortized cost Gross unrecognized gains Gross unrecognized losses Fair value Residential MBS: Agency-backed $ 1,400,989 $ 1,178 $ (20,168 ) $ 1,381,999 $ 290,889 $ 1,544 $ (3,504 ) $ 288,929 CMO/Other MBS 54,057 53 (957 ) 53,153 38,490 65 (660 ) 37,895 Total residential MBS 1,455,046 1,231 (21,125 ) 1,435,152 329,379 1,609 (4,164 ) 326,824 Other securities: Federal agencies 199,045 — (9,915 ) 189,130 58,312 1,648 — 59,960 Corporate 61,488 439 (880 ) 61,047 35,000 656 — 35,656 State and municipal 258,991 1,188 (3,837 ) 256,342 1,046,283 4,663 (32,018 ) 1,018,928 Other — — — — 5,750 199 — 5,949 Total other securities 519,524 1,627 (14,632 ) 506,519 1,145,345 7,166 (32,018 ) 1,120,493 Total securities $ 1,974,570 $ 2,858 $ (35,757 ) $ 1,941,671 $ 1,474,724 $ 8,775 $ (36,182 ) $ 1,447,317 December 31, 2016 Available for Sale Held to Maturity Amortized cost Gross unrealized gains Gross unrealized losses Fair value Amortized cost Gross unrecognized gains Gross unrecognized losses Fair value Residential MBS: Agency-backed $ 1,213,733 $ 569 $ (20,821 ) $ 1,193,481 $ 277,539 $ 1,353 $ (3,625 ) $ 275,267 CMO/Other MBS 57,563 44 (926 ) 56,681 40,594 74 (572 ) 40,096 Total residential MBS 1,271,296 613 (21,747 ) 1,250,162 318,133 1,427 (4,197 ) 315,363 Other securities: Federal agencies 204,770 2 (10,793 ) 193,979 58,200 1,392 — 59,592 Corporate 43,464 150 (1,108 ) 42,506 35,048 431 (11 ) 35,468 State and municipal 245,304 739 (5,273 ) 240,770 974,290 3,571 (36,232 ) 941,629 Other — — — — 5,750 195 — 5,945 Total other securities 493,538 891 (17,174 ) 477,255 1,073,288 5,589 (36,243 ) 1,042,634 Total securities $ 1,764,834 $ 1,504 $ (38,921 ) $ 1,727,417 $ 1,391,421 $ 7,016 $ (40,440 ) $ 1,357,997
Summary of securities held-to-maturity	A summary of amortized cost and estimated fair value of securities as of March 31, 2017 and December 31, 2016 is presented below. The term “MBS” refers to mortgage-backed securities and the term “CMO” refers to collateralized mortgage obligations. Both of these terms are further defined in Note 17. “Fair Value Measurements”. March 31, 2017 Available for Sale Held to Maturity Amortized cost Gross unrealized gains Gross unrealized losses Fair value Amortized cost Gross unrecognized gains Gross unrecognized losses Fair value Residential MBS: Agency-backed $ 1,400,989 $ 1,178 $ (20,168 ) $ 1,381,999 $ 290,889 $ 1,544 $ (3,504 ) $ 288,929 CMO/Other MBS 54,057 53 (957 ) 53,153 38,490 65 (660 ) 37,895 Total residential MBS 1,455,046 1,231 (21,125 ) 1,435,152 329,379 1,609 (4,164 ) 326,824 Other securities: Federal agencies 199,045 — (9,915 ) 189,130 58,312 1,648 — 59,960 Corporate 61,488 439 (880 ) 61,047 35,000 656 — 35,656 State and municipal 258,991 1,188 (3,837 ) 256,342 1,046,283 4,663 (32,018 ) 1,018,928 Other — — — — 5,750 199 — 5,949 Total other securities 519,524 1,627 (14,632 ) 506,519 1,145,345 7,166 (32,018 ) 1,120,493 Total securities $ 1,974,570 $ 2,858 $ (35,757 ) $ 1,941,671 $ 1,474,724 $ 8,775 $ (36,182 ) $ 1,447,317 December 31, 2016 Available for Sale Held to Maturity Amortized cost Gross unrealized gains Gross unrealized losses Fair value Amortized cost Gross unrecognized gains Gross unrecognized losses Fair value Residential MBS: Agency-backed $ 1,213,733 $ 569 $ (20,821 ) $ 1,193,481 $ 277,539 $ 1,353 $ (3,625 ) $ 275,267 CMO/Other MBS 57,563 44 (926 ) 56,681 40,594 74 (572 ) 40,096 Total residential MBS 1,271,296 613 (21,747 ) 1,250,162 318,133 1,427 (4,197 ) 315,363 Other securities: Federal agencies 204,770 2 (10,793 ) 193,979 58,200 1,392 — 59,592 Corporate 43,464 150 (1,108 ) 42,506 35,048 431 (11 ) 35,468 State and municipal 245,304 739 (5,273 ) 240,770 974,290 3,571 (36,232 ) 941,629 Other — — — — 5,750 195 — 5,945 Total other securities 493,538 891 (17,174 ) 477,255 1,073,288 5,589 (36,243 ) 1,042,634 Total securities $ 1,764,834 $ 1,504 $ (38,921 ) $ 1,727,417 $ 1,391,421 $ 7,016 $ (40,440 ) $ 1,357,997
Summary of amortized cost and fair value of investment securities available for sale by remaining period to contractual maturity	The amortized cost and estimated fair value of securities at March 31, 2017 are presented below by contractual maturity. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Residential MBS are shown separately since they are not due at a single maturity date. March 31, 2017 Available for sale Held to maturity Amortized cost Fair value Amortized cost Fair value Remaining period to contractual maturity: One year or less $ 12,315 $ 12,343 $ 22,829 $ 23,015 One to five years 95,619 95,455 65,479 66,997 Five to ten years 278,007 270,419 213,156 215,548 Greater than ten years 133,583 128,302 843,881 814,933 Total securities with a stated maturity date 519,524 506,519 1,145,345 1,120,493 Residential MBS 1,455,046 1,435,152 329,379 326,824 Total securities $ 1,974,570 $ 1,941,671 $ 1,474,724 $ 1,447,317
Sale of securities	Sales of securities for the periods indicated below were as follows: For the three months ended March 31, 2017 2016 Available for sale: Proceeds from sales $ 232 $ 275,358 Gross realized gains 6 1,562 Gross realized (losses) (29 ) (1,845 ) Income tax (benefit) on realized net (losses) (7 ) (96 )
Securities available for sale with unrealized losses, by length of time in continuous unrealized loss position	The following table summarizes securities available for sale with unrealized losses, segregated by the length of time in a continuous unrealized loss position for the periods presented below: Continuous unrealized loss position Less than 12 months 12 months or longer Total Fair value Unrealized losses Fair value Unrealized losses Fair value Unrealized losses Available for sale March 31, 2017 Residential MBS: Agency-backed $ 1,193,333 $ (20,162 ) $ 774 $ (6 ) $ 1,194,107 $ (20,168 ) CMO/Other MBS 35,701 (512 ) 14,050 (445 ) 49,751 (957 ) Total residential MBS 1,229,034 (20,674 ) 14,824 (451 ) 1,243,858 (21,125 ) Other securities: Federal agencies 189,126 (9,915 ) 4 — 189,130 (9,915 ) Corporate 10,317 (72 ) 15,087 (808 ) 25,404 (880 ) State and municipal 151,607 (3,758 ) 3,579 (79 ) 155,186 (3,837 ) Total other securities 351,050 (13,745 ) 18,670 (887 ) 369,720 (14,632 ) Total $ 1,580,084 $ (34,419 ) $ 33,494 $ (1,338 ) $ 1,613,578 $ (35,757 ) December 31, 2016 Residential MBS: Agency-backed $ 1,101,641 $ (20,816 ) $ 686 $ (5 ) $ 1,102,327 $ (20,821 ) CMO/Other MBS 38,841 (506 ) 15,239 (420 ) 54,080 (926 ) Total residential MBS 1,140,482 (21,322 ) 15,925 (425 ) 1,156,407 (21,747 ) Other securities: Federal agencies 185,504 (10,793 ) 4 — 185,508 (10,793 ) Corporate 10,399 (137 ) 14,942 (971 ) 25,341 (1,108 ) State and municipal 173,062 (5,196 ) 3,733 (77 ) 176,795 (5,273 ) Total other securities 368,965 (16,126 ) 18,679 (1,048 ) 387,644 (17,174 ) Total securities $ 1,509,447 $ (37,448 ) $ 34,604 $ (1,473 ) $ 1,544,051 $ (38,921 )
Securities held to maturity with unrealized losses, by length of time in continuous unrealized loss position	The following table summarizes securities held to maturity with unrecognized losses, segregated by the length of time in a continuous unrecognized loss position for the periods presented below: Continuous unrecognized loss position Less than 12 months 12 months or longer Total Fair value Unrecognized losses Fair value Unrecognized losses Fair value Unrecognized losses Held to maturity March 31, 2017 Residential MBS: Agency-backed $ 164,603 $ (3,185 ) $ 5,107 $ (319 ) $ 169,710 $ (3,504 ) CMO/Other MBS 32,975 (660 ) — — 32,975 (660 ) Total residential MBS 197,578 (3,845 ) 5,107 (319 ) 202,685 (4,164 ) Other securities: State and municipal 755,540 (31,862 ) 6,630 (156 ) 762,170 (32,018 ) Total $ 953,118 $ (35,707 ) $ 11,737 $ (475 ) $ 964,855 $ (36,182 ) December 31, 2016 Residential MBS: Agency-backed $ 185,116 $ (3,623 ) $ 213 $ (2 ) $ 185,329 $ (3,625 ) CMO/Other MBS 34,786 (572 ) — — 34,786 (572 ) Total residential MBS 219,902 (4,195 ) 213 (2 ) 220,115 (4,197 ) Other securities: Corporate — — 5,037 (11 ) 5,037 (11 ) State and municipal 758,690 (36,169 ) 2,816 (63 ) 761,506 (36,232 ) Total other securities 758,690 (36,169 ) 7,853 (74 ) 766,543 (36,243 ) Total securities $ 978,592 $ (40,364 ) $ 8,066 $ (76 ) $ 986,658 $ (40,440 )
Securities pledged for borrowings at FHLB and other institutions, and securities pledged for municipal deposits and other purposes	Securities pledged for borrowings at the FHLB and other institutions, and securities pledged for municipal deposits and other purposes, were as follows for the periods presented below: March 31, December 31, 2017 2016 Available for sale securities pledged for borrowings, at fair value $ 29,527 $ 67,599 Available for sale securities pledged for municipal deposits, at fair value 357,056 398,961 Available for sale securities pledged for customer back-to-back swaps, at fair value — 126 Held to maturity securities pledged for borrowings, at amortized cost 101,564 55,343 Held to maturity securities pledged for municipal deposits, at amortized cost 955,363 958,246 Total securities pledged $ 1,443,510 $ 1,480,275

Portfolio Loans (Tables)

Portfolio Loans (Tables)	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Components of loan portfolio excluding loans held for sale	The composition of the Company’s loan portfolio, excluding loans held for sale, was the following for the periods presented below: March 31, December 31, 2017 2016 Commercial: Commercial and industrial (“C&I”): Traditional C&I $ 1,469,130 $ 1,404,774 Asset-based lending 735,737 741,942 Payroll finance 223,934 255,549 Warehouse lending 486,381 616,946 Factored receivables 191,398 214,242 Equipment financing 662,844 589,315 Public sector finance 412,394 349,182 Total C&I 4,181,818 4,171,950 Commercial mortgage: Commercial real estate 3,313,848 3,162,942 Multi-family 1,062,797 981,076 Acquisition, development & construction (“ADC”) 238,966 230,086 Total commercial mortgage 4,615,611 4,374,104 Total commercial 8,797,429 8,546,054 Residential mortgage 695,398 697,108 Consumer 271,140 284,068 Total portfolio loans 9,763,967 9,527,230 Allowance for loan losses (66,939 ) (63,622 ) Total portfolio loans, net $ 9,697,028 $ 9,463,608
Schedule of amounts and status of loans and TDRs	The following tables set forth the amounts and status of the Company’s loans, troubled debt restructurings (“TDRs”) and non-performing loans at March 31, 2017 and December 31, 2016 : March 31, 2017 Current 30-59 days past due 60-89 days past due 90+ days past due Non- accrual Total Traditional C&I $ 1,441,001 $ 758 $ 1,015 $ 274 $ 26,082 $ 1,469,130 Asset-based lending 735,737 — — — — 735,737 Payroll finance 223,460 — 90 — 384 223,934 Warehouse lending 486,381 — — — — 486,381 Factored receivables 191,206 — — — 192 191,398 Equipment financing 657,646 1,476 1,018 — 2,704 662,844 Public sector finance 412,394 — — — — 412,394 Commercial real estate 3,290,081 2,505 796 318 20,148 3,313,848 Multi-family 1,062,732 — — — 65 1,062,797 ADC 235,703 — 2,000 88 1,175 238,966 Residential mortgage 677,587 2,279 1,035 108 14,389 695,398 Consumer 261,504 2,330 309 — 6,997 271,140 Total portfolio loans $ 9,675,432 $ 9,348 $ 6,263 $ 788 $ 72,136 $ 9,763,967 Total TDRs included above $ 15,741 $ — $ — $ 128 $ 2,530 $ 18,399 Non-performing loans: Loans 90+ days past due and still accruing $ 788 Non-accrual loans 72,136 Total non-performing loans $ 72,924 December 31, 2016 Current 30-59 days past due 60-89 days past due 90+ days past due Non- accrual Total Traditional C&I $ 1,376,181 $ 835 $ 817 $ 555 $ 26,386 $ 1,404,774 Asset-based lending 741,942 — — — — 741,942 Payroll finance 254,715 — 14 621 199 255,549 Warehouse lending 616,946 — — — — 616,946 Factored receivables 213,624 — — — 618 214,242 Equipment financing 583,835 2,142 1,092 — 2,246 589,315 Public sector finance 349,182 — — — — 349,182 Commercial real estate 3,140,561 967 — 406 21,008 3,162,942 Multi-family 981,005 — — — 71 981,076 ADC 224,817 — — — 5,269 230,086 Residential mortgage 675,750 5,509 951 108 14,790 697,108 Consumer 274,719 2,423 350 — 6,576 284,068 Total portfolio loans $ 9,433,277 $ 11,876 $ 3,224 $ 1,690 $ 77,163 $ 9,527,230 Total TDRs included above $ 11,032 $ 253 $ — $ — $ 1,989 $ 13,274 Non-performing loans: Loans 90+ days past due and still accruing $ 1,690 Non-accrual loans 77,163 Total non-performing loans $ 78,853
Schedule of additional analysis of non-accrual loans	The following table provides additional analysis of the Company’s non-accrual loans at March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 Recorded investment Non-accrual loans Recorded investment PCI (1) non-accrual loans Recorded investment total non-accrual loans Unpaid principal balance non-accrual loans Recorded investment Non-accrual loans Recorded investment PCI non-accrual loans Recorded investment total non-accrual loans Unpaid principal balance non-accrual loans Traditional C&I $ 22,047 $ 4,035 $ 26,082 $ 26,606 $ 22,338 $ 4,048 $ 26,386 $ 26,386 Payroll finance 384 — 384 1,746 199 — 199 199 Factored receivables 192 — 192 192 618 — 618 618 Equipment financing 2,704 — 2,704 2,704 2,246 — 2,246 2,246 Commercial real estate 14,254 5,894 20,148 25,229 15,063 5,945 21,008 25,619 Multi-family 65 — 65 71 71 — 71 71 ADC 1,175 — 1,175 1,310 5,269 — 5,269 5,398 Residential mortgage 13,008 1,381 14,389 17,361 13,399 1,391 14,790 18,190 Consumer 6,147 850 6,997 8,246 5,719 857 6,576 7,865 Total $ 59,976 $ 12,160 $ 72,136 $ 83,465 $ 64,922 $ 12,241 $ 77,163 $ 86,592 (1) The Company acquired loans for which there was, at acquisition, both evidence of deterioration of credit quality since origination and probability, at acquisition, that all contractually required payments would not be collected. These loans are classified as purchased credit impaired loans (“PCI loans”).
Impaired financing receivables	The following table sets forth loans evaluated for impairment by segment and the allowance evaluated by segment at March 31, 2017 : Loans evaluated by segment Allowance evaluated by segment Individually evaluated for impairment Collectively evaluated for impairment PCI loans Total loans Individually evaluated for impairment Collectively evaluated for impairment Total allowance for loan losses Traditional C&I $ 24,975 $ 1,430,558 $ 13,597 $ 1,469,130 $ — $ 14,441 $ 14,441 Asset-based lending — 720,242 15,495 735,737 — 3,353 3,353 Payroll finance — 223,934 — 223,934 — 1,155 1,155 Warehouse lending — 486,381 — 486,381 — 1,227 1,227 Factored receivables — 191,398 — 191,398 — 1,322 1,322 Equipment financing 4,952 657,892 — 662,844 — 6,039 6,039 Public sector finance — 412,394 — 412,394 — 1,249 1,249 Commercial real estate 14,787 3,256,578 42,483 3,313,848 — 23,438 23,438 Multi-family — 1,058,455 4,342 1,062,797 — 4,102 4,102 ADC 5,951 227,986 5,029 238,966 — 1,170 1,170 Residential mortgage 2,545 691,307 1,546 695,398 — 5,715 5,715 Consumer 1,497 268,045 1,598 271,140 — 3,728 3,728 Total portfolio loans $ 54,707 $ 9,625,170 $ 84,090 $ 9,763,967 $ — $ 66,939 $ 66,939 The following table sets forth loans evaluated for impairment by segment and the allowance evaluated by segment at December 31, 2016 : Loans evaluated by segment Allowance evaluated by segment Individually evaluated for impairment Collectively evaluated for impairment PCI loans Total loans Individually evaluated for impairment Collectively evaluated for impairment Total allowance for loan losses Traditional C&I $ 25,221 $ 1,365,466 $ 14,087 $ 1,404,774 $ — $ 12,864 $ 12,864 Asset-based lending — 724,247 17,695 741,942 — 3,316 3,316 Payroll finance 570 254,979 — 255,549 — 951 951 Warehouse lending — 616,946 — 616,946 — 1,563 1,563 Factored receivables — 214,242 — 214,242 — 1,669 1,669 Equipment financing 1,413 587,902 — 589,315 — 5,039 5,039 Public sector finance — 349,182 — 349,182 — 1,062 1,062 Commercial real estate 14,853 3,104,057 44,032 3,162,942 — 20,466 20,466 Multi-family — 976,710 4,366 981,076 — 4,991 4,991 ADC 9,025 216,094 4,967 230,086 — 1,931 1,931 Residential mortgage 2,545 692,396 2,167 697,108 — 5,864 5,864 Consumer 1,764 280,710 1,594 284,068 — 3,906 3,906 Total portfolio loans $ 55,391 $ 9,382,931 $ 88,908 $ 9,527,230 $ — $ 63,622 $ 63,622 The following table presents loans individually evaluated for impairment, excluding PCI loans, by segment of loans at March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 Unpaid principal balance Recorded investment Unpaid principal balance Recorded investment Loans with no related allowance recorded: Traditional C&I $ 25,355 $ 24,975 $ 25,221 $ 25,221 Payroll finance — — 570 570 Equipment financing 4,952 4,952 1,413 1,413 Commercial real estate 18,225 14,787 16,365 14,853 ADC 6,208 5,951 9,025 9,025 Residential mortgage 2,545 2,545 2,545 2,545 Consumer 1,497 1,497 1,764 1,764 Total $ 58,782 $ 54,707 $ 56,903 $ 55,391 At March 31, 2017 and December 31, 2016 there were no asset-based lending, factored receivables, warehouse lending, public sector finance loans or multi-family loans that were individually evaluated for impairment. The Company’s policy generally requires a charge-off of the difference between the present value of the cash flows or the net collateral value of the collateral securing the loan and the Company’s recorded investment. As a result, there were no impaired loans with an allowance recorded at March 31, 2017 or December 31, 2016 . The following tables present the average recorded investment and interest income recognized related to loans individually evaluated for impairment by segment for the three months ended March 31, 2017 and March 31, 2016 : For the three months ended March 31, 2017 March 31, 2016 QTD average recorded investment Interest income recognized QTD average recorded investment Interest income recognized Loans with no related allowance recorded: Traditional C&I $ 24,912 $ 7 $ 15,366 $ 9 Equipment financing 1,638 — 1,288 — Commercial real estate 14,124 40 13,118 39 Multi-family — — 884 — ADC 5,513 51 8,632 56 Residential mortgage 2,545 — 515 — Consumer 1,497 — 748 — Total $ 50,229 $ 98 $ 40,551 $ 104 There were no impaired loans with an allowance recorded at March 31, 2017 or December 31, 2016 . For the three months ended March 31, 2017 and 2016 , there were no asset-based lending, payroll finance, factored receivables, warehouse lending, or public sector finance loans that were impaired and there was no cash-basis interest income recognized.
Schedule of changes in the balance of accretable yield discount for PCI loans	The following table presents the changes in the balance of the accretable yield discount for PCI loans for three months ended March 31, 2017 and 2016 : For the three months ended March 31, 2017 2016 Balance at beginning of period $ 11,117 $ 11,211 Balances acquired in the NSBC Acquisition — 2,200 Accretion of income (1,199 ) (1,155 ) Disposals — — Reclassification from non-accretable difference 815 266 Balance at end of period $ 10,733 $ 12,522
Troubled debt restructurings	The following table presents loans by segment modified as TDRs that occurred during the first three months of 2017 and 2016 : March 31, 2017 March 31, 2016 Recorded investment Recorded investment Number Pre- modification Post- modification Number Pre- modification Post- modification Equipment financing 2 $ 3,088 $ 3,089 — $ — $ — Commercial real estate 2 1,724 1,724 — — — ADC 1 797 797 — — — Residential mortgage 1 239 238 1 469 469 Total TDRs 6 $ 5,848 $ 5,848 1 $ 469 $ 469 The following tables set forth the amounts and past due status of the Company’s TDRs at March 31, 2017 and December 31, 2016 : March 31, 2017 Current loans 30-59 days past due 60-89 days past due 90+ days past due Non- accrual Total Traditional C&I $ 570 $ — $ — $ — $ — $ 570 Equipment financing 3,088 — — — — 3,088 Commercial real estate 4,275 — — 128 — 4,403 ADC 5,574 — — — 1,175 6,749 Residential mortgage 2,234 — — — 1,355 3,589 Total $ 15,741 $ — $ — $ 128 $ 2,530 $ 18,399 December 31, 2016 Current loans 30-59 days past due 60-89 days past due 90+ days past due Non- accrual Total Traditional C&I $ 572 $ — $ — $ — $ 128 $ 700 Equipment financing — — — — 29 29 Commercial real estate 2,443 253 — — — 2,696 ADC 5,962 — — — 458 6,420 Residential mortgage 2,055 — — — 1,374 3,429 Total $ 11,032 $ 253 $ — $ — $ 1,989 $ 13,274

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Allowance for loan losses activity	Activity in the allowance for loan losses for the three months ended March 31, 2017 and 2016 is summarized below: For the three months ended March 31, 2017 Beginning balance Charge-offs Recoveries Net charge-offs Provision / (reversal of) Ending balance Traditional C&I $ 12,864 $ (687 ) $ 139 $ (548 ) $ 2,125 $ 14,441 Asset-based lending 3,316 — 3 3 34 3,353 Payroll finance 951 — — — 204 1,155 Warehouse lending 1,563 — — — (336 ) 1,227 Factored receivables 1,669 (296 ) 16 (280 ) (67 ) 1,322 Equipment financing 5,039 (471 ) 140 (331 ) 1,331 6,039 Public sector finance 1,062 — — — 187 1,249 Commercial real estate 20,466 (83 ) 2 (81 ) 3,053 23,438 Multi-family 4,991 — — — (889 ) 4,102 ADC 1,931 — 136 136 (897 ) 1,170 Residential mortgage 5,864 (158 ) 149 (9 ) (140 ) 5,715 Consumer 3,906 (114 ) 41 (73 ) (105 ) 3,728 Total allowance for loan losses $ 63,622 $ (1,809 ) $ 626 $ (1,183 ) $ 4,500 $ 66,939 Annualized net charge-offs to average loans outstanding: 0.05 % For the three months ended March 31, 2016 Beginning balance Charge-offs Recoveries Net charge-offs Provision / (reversal of) Ending balance Traditional C&I $ 9,922 $ (489 ) $ 313 $ (176 ) $ 1,159 $ 10,905 Asset-based lending 2,793 — 16 16 — 2,809 Payroll finance 1,936 — 4 4 (394 ) 1,546 Warehouse lending 589 — — — (69 ) 520 Factored receivables 1,457 (81 ) 24 (57 ) 7 1,407 Equipment financing 4,925 (457 ) 108 (349 ) 817 5,393 Public Sector Finance 547 — — — 8 555 Commercial real estate 13,861 (4 ) 21 17 1,892 15,770 Multi-family 2,741 — 2 2 253 2,996 ADC 2,009 — — — 148 2,157 Residential mortgage 5,007 (224 ) 28 (196 ) 39 4,850 Consumer 4,358 (511 ) 119 (392 ) 140 4,106 Total allowance for loan losses $ 50,145 $ (1,766 ) $ 635 $ (1,131 ) $ 4,000 $ 53,014 Annualized net charge-offs to average loans outstanding: 0.06 % The following table presents the allowance for loan losses to originated loans as of March 31, 2017 . The population of originated loans includes loans originated by the Company and acquired loans that have migrated into the population of loans covered by our allowance for loan losses. March 31, 2017 Originated: Pass Special mention Substandard Doubtful Loss Total Traditional C&I $ 1,085,899 $ 10,525 $ 41,457 $ 902 $ — $ 1,138,783 Asset-based lending 573,159 10,966 — — — 584,125 Payroll finance 203,878 19,672 384 — — 223,934 Warehouse lending 486,381 — — — — 486,381 Factored receivables 191,141 65 192 — — 191,398 Equipment financing 632,705 4,812 2,704 — — 640,221 Public sector finance 412,394 — — — — 412,394 Commercial real estate 3,125,759 11,908 18,103 — — 3,155,770 Multi-family 981,170 1,483 650 — — 983,303 ADC 227,525 6,620 4,821 — — 238,966 Residential mortgage 513,168 486 14,012 — — 527,666 Consumer 180,978 313 7,160 — — 188,451 Total originated loans $ 8,614,157 $ 66,850 $ 89,483 $ 902 $ — $ 8,771,392 Allowance for loan losses $ 60,193 $ 2,010 $ 4,061 $ 675 $ — $ 66,939 As a % of originated loans 0.70 % 3.01 % 4.54 % 74.83 % — % 0.76 % In purchase accounting, the prior allowance for loan losses is not carried over, and in its place, the Company is required to estimate the fair value of loans acquired, which is included as a purchase discount within the acquired loan discount. The following analysis presents the remaining purchase accounting marks to acquired loan portfolios as of March 31, 2017 . March 31, 2017 Acquired loans: Pass Special mention Substandard Doubtful Loss Total Traditional C&I $ 324,748 $ 5,314 $ 285 $ — $ — $ 330,347 Asset-based lending 145,365 6,247 — — — 151,612 Equipment financing 22,623 — — — — 22,623 Commercial real estate 121,510 26,327 10,241 — — 158,078 Multi-family 73,949 5,545 — — — 79,494 Residential mortgage 165,696 549 1,487 — — 167,732 Consumer 82,689 — — — — 82,689 Total loans subject to purchase accounting marks $ 936,580 $ 43,982 $ 12,013 $ — $ — $ 992,575 Remaining purchase accounting mark $ 31,433 $ 1,759 $ 991 $ — $ — $ 34,183 As a % of acquired loans 3.36 % 4.00 % 8.25 % — % — % 3.44 % Total portfolio loans $ 9,550,737 $ 110,832 $ 101,496 $ 902 $ — $ 9,763,967 The following table presents the allowance for loan losses to originated loans as of December 31, 2016 . December 31, 2016 Originated: Pass Special mention Substandard Doubtful Loss Total Traditional C&I $ 1,009,605 $ 5,104 $ 28,496 $ 442 $ — $ 1,043,647 Asset-based lending 545,220 17,678 — — — 562,898 Payroll finance 254,729 — 820 — — 255,549 Warehouse lending 616,946 — — — — 616,946 Factored receivables 213,624 185 433 — — 214,242 Equipment financing 556,522 2,128 3,397 — — 562,047 Public sector finance 349,182 — — — — 349,182 Commercial real estate 2,869,306 12,492 19,130 — — 2,900,928 Multi-family 866,825 1,497 658 — — 868,980 ADC 214,317 6,899 8,870 — — 230,086 Residential mortgage 505,803 951 14,578 — — 521,332 Consumer 191,961 646 6,738 — — 199,345 Total originated loans $ 8,194,040 $ 47,580 $ 83,120 $ 442 $ — $ 8,325,182 Allowance for loan losses $ 58,217 $ 1,423 $ 3,650 $ 332 $ — $ 63,622 As a % of originated loans 0.71 % 2.99 % 4.39 % 75.11 % — % 0.76 % The following analysis presents the remaining purchase accounting marks to acquired loan portfolios as of December 31, 2016 . December 31, 2016 Acquired loans: Pass Special mention Substandard Doubtful Loss Total Traditional C&I $ 353,625 $ 7,021 $ 481 $ — $ — $ 361,127 Asset-based lending 161,349 17,695 — — — 179,044 Equipment financing 27,268 — — — — 27,268 Commercial real estate 224,983 26,698 10,333 — — 262,014 Multi-family 106,521 5,575 — — — 112,096 Residential mortgage 174,558 — 1,218 — — 175,776 Consumer 84,723 — — — — 84,723 Total loans subject to purchase accounting marks $ 1,133,027 $ 56,989 $ 12,032 $ — $ — $ 1,202,048 Remaining purchase accounting mark $ 34,322 $ 1,725 $ 965 $ — $ — $ 37,012 As a % of acquired loans 3.03 % 3.03 % 8.02 % — % — % 3.08 % Total portfolio loans $ 9,327,067 $ 104,569 $ 95,152 $ 442 $ — $ 9,527,230
Financing receivable credit quality indicators	Loans that are risk-rated 1 through 6, as defined above, are considered to be pass-rated loans. As of March 31, 2017 and December 31, 2016 , the risk category of gross loans by segment was as follows: March 31, 2017 December 31, 2016 Special mention Substandard Doubtful Special mention Substandard Doubtful Traditional C&I $ 15,839 $ 41,742 $ 902 $ 12,125 $ 28,977 $ 442 Asset-based lending 17,213 — — 35,373 — — Payroll finance 19,672 384 — — 820 — Factored receivables 65 192 — 185 433 — Equipment financing 4,812 2,704 — 2,128 3,397 — Commercial real estate 38,235 28,344 — 39,190 29,463 — Multi-family 7,028 650 — 7,072 658 — ADC 6,620 4,821 — 6,899 8,870 — Residential mortgage 1,035 15,499 — 951 15,796 — Consumer 313 7,160 — 646 6,738 — Total $ 110,832 $ 101,496 $ 902 $ 104,569 $ 95,152 $ 442

Goodwill and Other Intangible33

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill and intangible assets	The balance of goodwill and other intangible assets for the periods presented were as follows: March 31, December 31, 2017 2016 Goodwill $ 696,600 $ 696,600 Other intangible assets: Core deposits $ 35,808 $ 37,455 Customer lists 7,226 7,683 Non-compete agreements 500 625 Trade name 20,500 20,500 Fair value of below market leases 64 90 Total $ 64,098 $ 66,353
Future amortization expense	The estimated aggregate future amortization expense for intangible assets remaining as of March 31, 2017 was as follows: Amortization expense Remainder of 2017 $ 6,583 2018 7,285 2019 6,074 2020 5,428 2021 5,022 2022 4,522 Thereafter 8,684 Total $ 43,598

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2017
Deposits [Abstract]
Summary of major classification of deposits	Deposit balances at March 31, 2017 and December 31, 2016 were as follows: March 31, December 31, 2017 2016 Non-interest bearing demand $ 3,196,841 $ 3,239,332 Interest bearing demand 2,217,719 2,220,456 Savings 801,887 747,031 Money market 3,488,716 3,277,686 Certificates of deposit 546,562 583,754 Total deposits $ 10,251,725 $ 10,068,259
List of Company's Brokered deposits	Brokered deposits at March 31, 2017 and December 31, 2016 were as follows: March 31, December 31, 2017 2016 Interest bearing demand $ 368,055 $ 426,437 Money market 244,722 246,572 Money market - reciprocal brokered deposits 156,122 153,060 Savings 8,000 5,560 Certificates of deposit - CDARs 1 one way 33,176 — Total brokered deposits $ 810,075 $ 831,629 1 CDARs (Certificate of deposit account registry service)

Borrowings (Tables)

Borrowings (Tables)	3 Months Ended
	Mar. 31, 2017
Debt Instruments [Abstract]
Schedule of debt	The Company’s borrowings and weighted average interest rates were as follows for the periods presented: March 31, December 31, 2017 2016 Amount Rate Amount Rate By type of borrowing: FHLB borrowings $ 2,035,000 1.19 % $ 1,791,000 1.01 % Repurchase agreements 24,472 0.73 16,642 0.75 Federal funds purchased 20,000 1.03 — — Senior Notes 76,551 5.98 76,469 5.98 Subordinated Notes 172,553 5.45 172,501 5.45 Total borrowings $ 2,328,576 1.66 % $ 2,056,612 1.56 % By remaining period to maturity: Less than one year $ 1,469,472 1.05 % $ 1,397,642 0.87 % One to two years 436,551 2.21 311,469 2.53 Two to three years 150,000 1.53 75,000 1.50 Three to four years 100,000 1.80 50,000 1.38 Four to five years — — 50,000 1.68 Greater than five years 172,553 5.45 172,501 5.45 Total borrowings $ 2,328,576 1.66 % $ 2,056,612 1.56 %

Derivatives (Tables)

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedges, Assets [Abstract]
Summary of derivatives	Summary information as of March 31, 2017 and December 31, 2016 regarding these derivatives is presented below: Notional amount Average maturity (in years) Weighted average fixed rate Weighted average variable rate Fair value March 31, 2017 Included in other assets: Third-party interest rate swap $ 181,122 $ 595 Customer interest rate swap 195,860 1,867 Total $ 376,982 5.46 3.88 % 1 m Libor + 2.26% $ 2,462 Included in other liabilities: Third-party interest rate swap (195,860 ) $ (1,768 ) Customer interest rate swap (181,122 ) (4,029 ) Total $ (376,982 ) 5.46 3.88 1 m Libor + 2.26% $ (5,797 ) December 31, 2016 3rd party interest rate swap 296,282 5.63 3.94 1 m Libor + 2.29% $ 2,088 Customer interest rate swap (296,282 ) 5.63 3.94 1 m Libor + 2.29% (2,088 )

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	Actual income tax expense differs from the tax computed based on pre-tax income and the applicable statutory Federal tax rate for the following reasons: For the three months ended March 31, 2017 2016 Income before income tax expense $ 56,776 $ 36,009 Tax at Federal statutory rate of 35% 19,872 12,603 State and local income taxes, net of Federal tax benefit 2,274 1,993 Tax-exempt interest, net of disallowed interest (3,484 ) (1,834 ) Bank owned life insurance income (462 ) (445 ) Non-deductible acquisition related costs 342 — Low income housing tax credits (139 ) (54 ) Stock-based compensation benefit (1) (742 ) — Other, net 48 (20 ) Actual income tax expense $ 17,709 $ 12,243 Effective income tax rate 31.2 % 34.0 %

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Summary of Company's stock option activity	The following table summarizes the activity in the Company’s active stock-based compensation plans for the three months ended March 31, 2017 : Non-vested stock awards/stock units outstanding Stock options outstanding Shares available for grant Number of shares Weighted average grant date fair value Number of shares Weighted average exercise price Balance at January 1, 2017 3,639,838 932,223 $ 14.09 1,004,119 $ 11.00 Granted (360,867 ) 360,867 24.28 — — Stock awards vested — (134,226 ) 13.98 — — Exercised — — — (40,253 ) 11.07 Forfeited 1,291 (1,291 ) 13.82 — — Canceled/expired (499 ) — — — — Balance at March 31, 2017 3,279,763 1,157,573 $ 17.28 963,866 $ 10.99 Exercisable at March 31, 2017 846,946 $ 10.67
Schedule of stock-based compensation expense associated with stock options and non-vested stock awards	Stock-based compensation expense associated with stock options and non-vested stock awards and the related income tax benefit are presented below: For the three months ended March 31, 2017 2016 Stock options $ 50 $ 126 Non-vested stock awards/performance units 1,686 1,414 Total $ 1,736 $ 1,540 Income tax benefit 564 524 Proceeds from stock option exercises 493 546
Unrecognized stock-based compensation expense	Unrecognized stock-based compensation expense as of March 31, 2017 was as follows: March 31, 2017 Stock options $ 73 Non-vested stock awards/performance units 15,257 Total $ 15,330

Other Post Retirement Plans (Ta

Other Post Retirement Plans (Tables)	3 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Schedule of net pension (benefit) expense and post-retirement expense	Net other post-retirement expense is comprised of the following for the periods presented below: For the three months ended March 31, 2017 2016 Service cost $ — $ — Interest cost 100 104 Net amortization and deferral 9 12 Total other post-retirement expense $ 109 $ 116

Other Non-interest Expense (Tab

Other Non-interest Expense (Tables)	3 Months Ended
	Mar. 31, 2017
Other Income and Expenses [Abstract]
Schedule of Other Non-interest Expense	Other non-interest expense items for the three months ended March 31, 2017 and 2016 , respectively, are presented in the following table. For the three months ended March 31, 2017 2016 Other non-interest expense: Advertising and promotion $ 551 $ 551 Professional fees 2,205 2,471 Data and check processing 2,469 1,754 Insurance & surety bond premium 537 785 Other 4,407 5,169 Total other non-interest expense $ 10,169 $ 10,730

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per share	The following is a summary of the calculation of earnings per share (“EPS”): For the three months ended March 31, 2017 2016 Net income $ 39,067 $ 23,766 Weighted average common shares outstanding for computation of basic EPS 135,163,347 129,974,025 Common-equivalent shares due to the dilutive effect of stock options and unvested performance share grants (1) 648,374 526,950 Weighted average common shares for computation of diluted EPS 135,811,721 130,500,975 Earnings per common share: Basic $ 0.29 $ 0.18 Diluted 0.29 0.18 Weighted average common shares that could be exercised that were anti-dilutive for the period (2) — — (1) Represents incremental shares computed using the treasury stock method. (2) Anti-dilutive shares are not included in determining diluted earnings per share. There were no anti-dilutive shares in the three months ended March 31, 2017 or 2016.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The following tables present actual and required capital ratios as of March 31, 2017 and December 31, 2016 for the Company and the Bank under the Basel III Capital Rules. The minimum required capital amounts presented include the minimum required capital levels as of March 31, 2017 and December 31, 2016 based on the phase-in provisions of the Basel III Capital Rules and the minimum required capital levels as of January 1, 2019 when the Basel III Capital Rules have been fully phased-in. Capital levels required to be considered well-capitalized are based upon prompt corrective action regulations, as amended to reflect the changes under the Basel III Capital Rules. Actual Minimum capital required - Basel III phase-in schedule Minimum capital required - Basel III fully phased-in Required to be considered well- capitalized Capital amount Ratio Capital amount Ratio Capital amount Ratio Capital amount Ratio March 31, 2017 Common equity tier 1 to RWA: Sterling National Bank $ 1,197,463 10.79 % $ 638,196 5.75 % $ 776,934 7.00 % $ 721,439 6.50 % Sterling Bancorp 1,184,294 10.67 637,994 5.75 776,689 7.00 N/A N/A Tier 1 capital to RWA: Sterling National Bank 1,197,463 10.79 % 804,681 7.25 % 943,420 8.50 % 887,924 8.00 % Sterling Bancorp 1,184,294 10.67 804,428 7.25 943,122 8.50 N/A N/A Total capital to RWA: Sterling National Bank 1,437,500 12.95 % 1,026,662 9.25 % 1,165,401 10.50 % 1,109,905 10.00 % Sterling Bancorp 1,404,613 12.66 1,026,339 9.25 1,165,033 10.50 N/A N/A Tier 1 leverage ratio: Sterling National Bank 1,197,463 8.99 532,938 4.00 % 532,938 4.00 % 666,172 5.00 % Sterling Bancorp 1,184,294 8.89 532,911 4.00 532,911 4.00 N/A N/A Actual Minimum capital required - Basel III phase-in schedule Minimum capital required - Basel III fully phased-in Required to be considered well- capitalized Capital amount Ratio Capital amount Ratio Capital amount Ratio Capital amount Ratio December 31, 2016 Common equity tier 1 to RWA: Sterling National Bank $ 1,176,497 10.87 % $ 554,663 5.125 % $ 757,588 7.00 % $ 703,475 6.50 % Sterling Bancorp 1,160,739 10.73 554,474 5.125 757,330 7.00 N/A N/A Tier 1 capital to RWA: Sterling National Bank 1,176,497 10.87 % 717,003 6.625 % 919,928 8.50 % 865,815 8.00 % Sterling Bancorp 1,160,739 10.73 716,759 6.625 919,615 8.50 N/A N/A Total capital to RWA: Sterling National Bank 1,413,165 13.06 % 933,457 8.625 % 1,136,382 10.50 % 1,082,269 10.00 % Sterling Bancorp 1,377,547 12.73 933,139 8.625 1,135,995 10.50 N/A N/A Tier 1 leverage ratio: Sterling National Bank 1,176,497 9.08 % 518,308 4.000 % 518,308 4.00 % 647,885 5.00 % Sterling Bancorp 1,160,739 8.95 518,733 4.000 518,733 4.00 N/A N/A

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of off-balance-sheet financial instruments	The contractual or notional amounts of these instruments, which reflect the extent of the Company’s involvement in particular classes of off-balance sheet financial instruments, are summarized as follows: March 31, December 31, 2017 2016 Loan origination commitments $ 282,661 $ 245,319 Unused lines of credit 999,537 968,288 Letters of credit 115,163 114,582
Schedule of future minimum lease payments due	Future minimum lease payments due under non-cancelable operating leases at March 31, 2017 were as follows: Remainder of 2017 $ 7,956 2018 10,237 2019 8,693 2020 7,790 2021 6,355 2022 5,229 2023 and thereafter 16,272 $ 62,532

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Estimated fair value on a recurring basis	A summary of such investment securities available for sale and derivatives at March 31, 2017 and December 31, 2016 , respectively, were measured at estimated fair value on a recurring basis, is as follows: March 31, 2017 Fair value Level 1 inputs Level 2 inputs Level 3 inputs Assets: Investment securities available for sale: Residential MBS (1) : Agency-backed $ 1,381,999 $ — $ 1,381,999 $ — CMO (2) /Other MBS 53,153 — 53,153 — Total residential MBS 1,435,152 — 1,435,152 — Other securities: Federal agencies 189,130 — 189,130 — Corporate 61,047 — 61,047 — State and municipal 256,342 — 256,342 — Total other securities 506,519 — 506,519 — Total available for sale securities 1,941,671 — 1,941,671 — Swaps 2,462 — 2,462 — Total assets $ 1,944,133 $ — $ 1,944,133 $ — Liabilities: Swaps $ (5,797 ) $ — $ (5,797 ) $ — Total liabilities $ (5,797 ) $ — $ (5,797 ) $ — (1) Residential MBS are debt securities whose cash flows come from residential loans, such as mortgages and HELOCs. A residential MBS is comprised of a pool of mortgage loans created by financial institutions including governmental agencies. The cash flows from each of the mortgage loans included in the pool are structured through a special purpose entity into various classes and tranches, which then issue securities backed by those cash flows to investors. (2) CMOs are debt securities that are collateralized by a specific pool of residential mortgage loans, in which the issuer of the CMOs can direct the payments of principal and interest received on the underlying collateral to achieve specific investor cash flow objectives. The Bank generally acquires planned-amortization class securities and CMOs with a sequential pay structure in order to manage the duration and extension risk inherent in these securities. December 31, 2016 Fair value Level 1 inputs Level 2 inputs Level 3 inputs Assets: Investment securities available for sale: Residential MBS: Agency-backed $ 1,193,481 $ — $ 1,193,481 $ — CMO/Other MBS 56,681 — 56,681 — Total residential MBS 1,250,162 — 1,250,162 — Federal agencies 193,979 — 193,979 — Corporate bonds 42,506 — 42,506 — State and municipal 240,770 — 240,770 — Total investment securities available for sale 477,255 — 477,255 — Total available for sale securities 1,727,417 — 1,727,417 — Swaps 2,088 — 2,088 — Total assets $ 1,729,505 $ — $ 1,729,505 $ — Liabilities: Swaps $ (2,088 ) $ — $ (2,088 ) $ — Total liabilities $ (2,088 ) $ — $ (2,088 ) $ —
Impaired loans measured at estimated fair value on nonrecurring basis	A summary of the class with impaired loans at March 31, 2017 and December 31, 2016 , respectively, is set forth below: March 31, 2017 Fair value Level 1 inputs Level 2 inputs Level 3 inputs C&I $ 177 $ — $ — $ 177 Commercial real estate 6,454 — — 6,454 Total impaired loans measured at fair value $ 6,631 $ — $ — $ 6,631 December 31, 2016 Fair value Level 1 inputs Level 2 inputs Level 3 inputs Commercial real estate $ 6,786 $ — $ — $ 6,786 Total impaired loans measured at fair value $ 6,786 $ — $ — $ 6,786
Carrying amounts and estimated fair value of financial assets and liabilities	The following is a summary of the carrying amounts and estimated fair value of financial assets and liabilities (none of which were held for trading purposes) as of March 31, 2017 : March 31, 2017 Carrying amount Level 1 inputs Level 2 inputs Level 3 inputs Financial assets: Cash and cash equivalents $ 253,703 $ 253,703 $ — $ — Securities available for sale 1,941,671 — 1,941,671 — Securities held to maturity 1,474,724 — 1,447,317 — Loans held for sale 2,559 — 2,559 — Portfolio loans, net 9,697,028 — — 9,693,553 Accrued interest receivable on securities 20,816 — 20,816 — Accrued interest receivable on loans 28,158 — — 28,158 FHLB stock and FRB stock 148,030 — — — Swaps 2,462 — 2,462 — Financial liabilities: Non-maturity deposits (9,705,163 ) (9,705,163 ) — — Certificates of deposit (546,562 ) — (544,843 ) — FHLB borrowings (2,035,000 ) — (2,031,918 ) — Other borrowings (44,472 ) — (44,472 ) — Senior Notes (76,551 ) — (80,244 ) — Subordinated Notes (172,553 ) — (175,113 ) — Mortgage escrow funds (13,153 ) — (13,153 ) — Accrued interest payable on deposits (598 ) — (598 ) — Accrued interest payable on borrowings (7,527 ) — (7,527 ) — Swaps (5,797 ) — (5,797 ) — The following is a summary of the carrying amounts and estimated fair value of financial assets and liabilities (none of which were held for trading purposes) as of December 31, 2016 : December 31, 2016 Carrying amount Level 1 inputs Level 2 inputs Level 3 inputs Financial assets: Cash and cash equivalents $ 293,646 $ 293,646 $ — $ — Securities available for sale 1,727,417 — 1,727,417 — Securities held to maturity 1,391,421 — 1,357,997 — Loans held for sale 41,889 — 41,889 — Portfolio loans, net 9,463,608 — — 9,461,469 Accrued interest receivable on securities 16,495 — 16,495 — Accrued interest receivable on loans 26,824 — — 26,824 FHLB stock and FRB stock 135,098 — — — Swaps 2,088 — 2,088 — Financial liabilities: Non-maturity deposits (9,484,505 ) (9,484,505 ) — — Certificates of deposit (583,754 ) — (582,811 ) — FHLB borrowings (1,791,000 ) — (1,788,676 ) — Other borrowings (16,642 ) — (16,642 ) — Senior Notes (76,469 ) — (79,283 ) — Subordinated Notes (172,501 ) — (169,813 ) — Mortgage escrow funds (13,572 ) — (13,572 ) — Accrued interest payable on deposits (663 ) — (663 ) — Accrued interest payable on borrowings (3,621 ) — (3,621 ) — Swaps (2,088 ) — (2,088 ) —

Accumulated Other Comprehensi45

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	Components of accumulated other comprehensive income (loss) (“AOCI”) were as follows as of the dates shown below: March 31, December 31, 2017 2016 Net unrealized holding loss on available for sale securities $ (32,899 ) $ (37,417 ) Related income tax benefit 12,995 14,780 Available for sale securities AOCI, net of tax (19,904 ) (22,637 ) Net unrealized holding loss on securities transferred to held to maturity (5,152 ) (5,395 ) Related income tax benefit 2,035 2,131 Securities transferred to held to maturity AOCI, net of tax (3,117 ) (3,264 ) Net unrealized holding loss on retirement plans (1,157 ) (1,213 ) Related income tax benefit 457 479 Retirement plans AOCI, net of tax (700 ) (734 ) AOCI $ (23,721 ) $ (26,635 ) The following table presents the changes in each component of AOCI for the three months ended March 31, 2017 and 2016 : Net unrealized holding gain (loss) on available for sale securities Net unrealized holding gain (loss) on securities transferred to held to maturity Net unrealized holding (loss) gain on retirement plans Total For the three months ended March 31, 2017 Balance beginning of the period $ (22,637 ) $ (3,264 ) $ (734 ) $ (26,635 ) Other comprehensive gain before reclassification 2,747 — — 2,747 Amounts reclassified from AOCI (14 ) 147 34 167 Total other comprehensive income 2,733 147 34 2,914 Balance at end of period $ (19,904 ) $ (3,117 ) $ (700 ) $ (23,721 ) For the three months ended March 31, 2016 Balance beginning of the period $ (6,999 ) $ (4,155 ) $ (970 ) $ (12,124 ) Other comprehensive gain before reclassification 16,285 — — 16,285 Amounts reclassified from AOCI (171 ) (45 ) 214 (2 ) Total other comprehensive income 16,114 (45 ) 214 16,283 Balance at end of period $ 9,115 $ (4,200 ) $ (756 ) $ 4,159 Location in income statement where reclassification from AOCI is included Net (loss) on sale of securities Interest income on securities Compensation and benefits expense

Pending Merger with Astoria F46

Pending Merger with Astoria Financial Corporation (Tables)	3 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Business Acquisition, Pro Forma Information	Upon closing, Company shareholders will own approximately 60% of stock in the combined company and Astoria shareholders will own approximately 40% . Proforma information for the year ended December 31, 2016 was as follows: For the year ended December 31, 2016 Pro Forma Condensed Income Statement Information: Net interest income $ 818,907 Provision for loan losses 10,849 Income before income taxes 385,185 Net income 251,173 Pro Forma Condensed Combined Balance Sheet Information: Portfolio loans, net 19,530,795 Total assets 29,510,290 Deposits 18,956,004 Total stockholders’ equity 4,218,852

Basis of Financial Statement 47

Basis of Financial Statement Presentation - Adoption of New Accounting Standards (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reduction of income tax expense	$ 742

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ in Thousands	Sep. 09, 2016	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Portfolio loans purchased			$ 94,912	$ 0
Discount amount on acquired loan receivable			3,725		$ 1,788
Goodwill			$ 696,600		$ 696,600
NSBC
Business Acquisition [Line Items]
Percentage of outstanding common stock acquired		100.00%		100.00%
Loans receivable acquired		$ 320,447		$ 320,447
Premium paid for loans receivable acquired as a percent of gross loans acquired		5.90%		5.90%
Premium paid for loans receivable acquired		$ 18,906		$ 18,906
Liabilities assumed		4,839		4,839
Goodwill		25,698		25,698
NSBC | Customer lists
Business Acquisition [Line Items]
Intangible asset acquired		$ 1,500		$ 1,500
Estimated life		24 months
Traditional C&I | GE Capital
Business Acquisition [Line Items]
Portfolio loan acquired, unpaid principal balance	$ 169,760
Portfolio loans purchased	$ 163,282
Discount rate on acquired portfolio loan	4.00%
Discount amount on acquired loan receivable	$ 6,790

Securities - Amortized Cost to

Securities - Amortized Cost to Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available for Sale
Amortized cost	$ 1,974,570	$ 1,764,834
Gross unrealized gains	2,858	1,504
Gross unrealized losses	(35,757)	(38,921)
Available for sale, at fair value	1,941,671	1,727,417
Held to Maturity
Amortized cost	1,474,724	1,391,421
Gross unrealized gains	8,775	7,016
Gross unrealized losses	(36,182)	(40,440)
Fair value	1,447,317	1,357,997
Residential MBS:
Available for Sale
Amortized cost	1,455,046	1,271,296
Gross unrealized gains	1,231	613
Gross unrealized losses	(21,125)	(21,747)
Available for sale, at fair value	1,435,152	1,250,162
Held to Maturity
Amortized cost	329,379	318,133
Gross unrealized gains	1,609	1,427
Gross unrealized losses	(4,164)	(4,197)
Fair value	326,824	315,363
Other securities:
Available for Sale
Amortized cost	519,524	493,538
Gross unrealized gains	1,627	891
Gross unrealized losses	(14,632)	(17,174)
Available for sale, at fair value	506,519	477,255
Held to Maturity
Amortized cost	1,145,345	1,073,288
Gross unrealized gains	7,166	5,589
Gross unrealized losses	(32,018)	(36,243)
Fair value	1,120,493	1,042,634
Agency-backed | Residential MBS:
Available for Sale
Amortized cost	1,400,989	1,213,733
Gross unrealized gains	1,178	569
Gross unrealized losses	(20,168)	(20,821)
Available for sale, at fair value	1,381,999	1,193,481
Held to Maturity
Amortized cost	290,889	277,539
Gross unrealized gains	1,544	1,353
Gross unrealized losses	(3,504)	(3,625)
Fair value	288,929	275,267
CMO/Other MBS | Residential MBS:
Available for Sale
Amortized cost	54,057	57,563
Gross unrealized gains	53	44
Gross unrealized losses	(957)	(926)
Available for sale, at fair value	53,153	56,681
Held to Maturity
Amortized cost	38,490	40,594
Gross unrealized gains	65	74
Gross unrealized losses	(660)	(572)
Fair value	37,895	40,096
Federal agencies | Other securities:
Available for Sale
Amortized cost	199,045	204,770
Gross unrealized gains	0	2
Gross unrealized losses	(9,915)	(10,793)
Available for sale, at fair value	189,130	193,979
Held to Maturity
Amortized cost	58,312	58,200
Gross unrealized gains	1,648	1,392
Gross unrealized losses	0	0
Fair value	59,960	59,592
Corporate | Other securities:
Available for Sale
Amortized cost	61,488	43,464
Gross unrealized gains	439	150
Gross unrealized losses	(880)	(1,108)
Available for sale, at fair value	61,047	42,506
Held to Maturity
Amortized cost	35,000	35,048
Gross unrealized gains	656	431
Gross unrealized losses	0	(11)
Fair value	35,656	35,468
State and municipal | Other securities:
Available for Sale
Amortized cost	258,991	245,304
Gross unrealized gains	1,188	739
Gross unrealized losses	(3,837)	(5,273)
Available for sale, at fair value	256,342	240,770
Held to Maturity
Amortized cost	1,046,283	974,290
Gross unrealized gains	4,663	3,571
Gross unrealized losses	(32,018)	(36,232)
Fair value	1,018,928	941,629
Other | Other securities:
Available for Sale
Amortized cost	0	0
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Available for sale, at fair value	0	0
Held to Maturity
Amortized cost	5,750	5,750
Gross unrealized gains	199	195
Gross unrealized losses	0	0
Fair value	$ 5,949	$ 5,945

Securities - Future Maturity (D

Securities - Future Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available for Sale
Amortized cost, One year or less	$ 12,315
Amortized cost, One to five years	95,619
Amortized cost, Five to ten years	278,007
Amortized cost, Greater than ten years	133,583
Amortized cost, Total securities with a stated maturity date	519,524
Amortized cost, Available for sale securities	1,974,570	$ 1,764,834
Fair value, One year or less	12,343
Fair value, One to five years	95,455
Fair value, Five to ten years	270,419
Fair value, Greater than ten years	128,302
Fair value, Total securities with a stated maturity date	506,519
Fair value, Available for sale securities	1,941,671	1,727,417
Held to Maturity
Amortized cost, One year or less	22,829
Amortized cost, One to five years	65,479
Amortized cost, Five to ten years	213,156
Amortized cost, Greater than ten years	843,881
Amortized cost, Total securities with a stated maturity date	1,145,345
Amortized cost, Held to maturity securities	1,474,724	1,391,421
Fair value, One year or less	23,015
Fair value, One to five years	66,997
Fair value, Five to ten years	215,548
Fair value, Greater than ten years	814,933
Fair value, Total securities with a stated maturity date	1,120,493
Fair value	1,447,317	1,357,997
Residential MBS:
Available for Sale
Amortized cost, Available for sale securities	1,455,046	1,271,296
Fair value, Available for sale securities	1,435,152	1,250,162
Held to Maturity
Amortized cost, Held to maturity securities	329,379	318,133
Fair value	$ 326,824	$ 315,363

Securities - Sale of Securities

Securities - Sale of Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 232	$ 275,358
Gross realized gains	6	1,562
Gross realized (losses)	(29)	(1,845)
Income tax (benefit) on realized net (losses)	$ (7)	$ (96)

Securities - Available-for-sale

Securities - Available-for-sale Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Fair value, Less than 12 months	$ 1,580,084	$ 1,509,447
Unrealized losses, Less than 12 months	(34,419)	(37,448)
Fair value, 12 months or longer	33,494	34,604
Unrealized losses, 12 months or longer	(1,338)	(1,473)
Fair value, Total	1,613,578	1,544,051
Unrealized losses, Total	(35,757)	(38,921)
Residential MBS:
Schedule of Available-for-sale Securities [Line Items]
Fair value, Less than 12 months	1,229,034	1,140,482
Unrealized losses, Less than 12 months	(20,674)	(21,322)
Fair value, 12 months or longer	14,824	15,925
Unrealized losses, 12 months or longer	(451)	(425)
Fair value, Total	1,243,858	1,156,407
Unrealized losses, Total	(21,125)	(21,747)
Other securities:
Schedule of Available-for-sale Securities [Line Items]
Fair value, Less than 12 months	351,050	368,965
Unrealized losses, Less than 12 months	(13,745)	(16,126)
Fair value, 12 months or longer	18,670	18,679
Unrealized losses, 12 months or longer	(887)	(1,048)
Fair value, Total	369,720	387,644
Unrealized losses, Total	(14,632)	(17,174)
Agency-backed | Residential MBS:
Schedule of Available-for-sale Securities [Line Items]
Fair value, Less than 12 months	1,193,333	1,101,641
Unrealized losses, Less than 12 months	(20,162)	(20,816)
Fair value, 12 months or longer	774	686
Unrealized losses, 12 months or longer	(6)	(5)
Fair value, Total	1,194,107	1,102,327
Unrealized losses, Total	(20,168)	(20,821)
CMO/Other MBS | Residential MBS:
Schedule of Available-for-sale Securities [Line Items]
Fair value, Less than 12 months	35,701	38,841
Unrealized losses, Less than 12 months	(512)	(506)
Fair value, 12 months or longer	14,050	15,239
Unrealized losses, 12 months or longer	(445)	(420)
Fair value, Total	49,751	54,080
Unrealized losses, Total	(957)	(926)
Federal agencies | Other securities:
Schedule of Available-for-sale Securities [Line Items]
Fair value, Less than 12 months	189,126	185,504
Unrealized losses, Less than 12 months	(9,915)	(10,793)
Fair value, 12 months or longer	4	4
Unrealized losses, 12 months or longer	0	0
Fair value, Total	189,130	185,508
Unrealized losses, Total	(9,915)	(10,793)
Corporate | Other securities:
Schedule of Available-for-sale Securities [Line Items]
Fair value, Less than 12 months	10,317	10,399
Unrealized losses, Less than 12 months	(72)	(137)
Fair value, 12 months or longer	15,087	14,942
Unrealized losses, 12 months or longer	(808)	(971)
Fair value, Total	25,404	25,341
Unrealized losses, Total	(880)	(1,108)
State and municipal | Other securities:
Schedule of Available-for-sale Securities [Line Items]
Fair value, Less than 12 months	151,607	173,062
Unrealized losses, Less than 12 months	(3,758)	(5,196)
Fair value, 12 months or longer	3,579	3,733
Unrealized losses, 12 months or longer	(79)	(77)
Fair value, Total	155,186	176,795
Unrealized losses, Total	$ (3,837)	$ (5,273)

Securities - Held to Maturity S

Securities - Held to Maturity Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Fair value, Less than 12 months	$ 953,118	$ 978,592
Unrealized losses, Less than 12 months	(35,707)	(40,364)
Fair value, 12 months or longer	11,737	8,066
Unrealized losses, 12 months or longer	(475)	(76)
Fair value, Total	964,855	986,658
Unrealized losses, Total	(36,182)	(40,440)
Residential MBS:
Schedule of Held-to-maturity Securities [Line Items]
Fair value, Less than 12 months	197,578	219,902
Unrealized losses, Less than 12 months	(3,845)	(4,195)
Fair value, 12 months or longer	5,107	213
Unrealized losses, 12 months or longer	(319)	(2)
Fair value, Total	202,685	220,115
Unrealized losses, Total	(4,164)	(4,197)
Residential MBS: | Agency-backed
Schedule of Held-to-maturity Securities [Line Items]
Fair value, Less than 12 months	164,603	185,116
Unrealized losses, Less than 12 months	(3,185)	(3,623)
Fair value, 12 months or longer	5,107	213
Unrealized losses, 12 months or longer	(319)	(2)
Fair value, Total	169,710	185,329
Unrealized losses, Total	(3,504)	(3,625)
Residential MBS: | CMO/Other MBS
Schedule of Held-to-maturity Securities [Line Items]
Fair value, Less than 12 months	32,975	34,786
Unrealized losses, Less than 12 months	(660)	(572)
Fair value, 12 months or longer	0	0
Unrealized losses, 12 months or longer	0	0
Fair value, Total	32,975	34,786
Unrealized losses, Total	(660)	(572)
Other securities:
Schedule of Held-to-maturity Securities [Line Items]
Fair value, Less than 12 months		758,690
Unrealized losses, Less than 12 months		(36,169)
Fair value, 12 months or longer		7,853
Unrealized losses, 12 months or longer		(74)
Fair value, Total		766,543
Unrealized losses, Total		(36,243)
Other securities: | Corporate
Schedule of Held-to-maturity Securities [Line Items]
Fair value, Less than 12 months		0
Unrealized losses, Less than 12 months		0
Fair value, 12 months or longer		5,037
Unrealized losses, 12 months or longer		(11)
Fair value, Total		5,037
Unrealized losses, Total		(11)
Other securities: | State and municipal
Schedule of Held-to-maturity Securities [Line Items]
Fair value, Less than 12 months	755,540	758,690
Unrealized losses, Less than 12 months	(31,862)	(36,169)
Fair value, 12 months or longer	6,630	2,816
Unrealized losses, 12 months or longer	(156)	(63)
Fair value, Total	762,170	761,506
Unrealized losses, Total	$ (32,018)	$ (36,232)

Securities - Securities Pledged

Securities - Securities Pledged for Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	$ 1,443,510	$ 1,480,275
Federal Home Loan Bank Borrowings
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	29,527	67,599
Held-to-maturity securities pledged as collateral	101,564	55,343
Municipal Deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	357,056	398,961
Held-to-maturity securities pledged as collateral	955,363	958,246
Interest Rate Swap
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	$ 0	$ 126

Securities - Narrative (Details

Securities - Narrative (Details)	3 Months Ended
	Mar. 31, 2017security
Investments, Debt and Equity Securities [Abstract]
Number of securities which were in continuous unrealized loss position for less than 12 months	261
Number of securities which were in continuous unrealized loss position for 12 months or more	41

Portfolio Loans - Composition o

Portfolio Loans - Composition of Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Components of loan portfolio, excluding loans held for sale
Traditional C&I	$ 1,469,130	$ 1,404,774
Asset-based lending	735,737	741,942
Payroll finance	223,934	255,549
Warehouse lending	486,381	616,946
Factored receivables	191,398	214,242
Equipment financing	662,844	589,315
Public sector finance	412,394	349,182
Total C&I	4,181,818	4,171,950
Commercial real estate	3,313,848	3,162,942
Multi-family	1,062,797	981,076
Acquisition, development & construction (“ADC”)	238,966	230,086
Total commercial mortgage	4,615,611	4,374,104
Total commercial	8,797,429	8,546,054
Residential mortgage	695,398	697,108
Consumer	271,140	284,068
Portfolio loans	9,763,967	9,527,230
Allowance for loan losses	(66,939)	(63,622)	$ (53,014)	$ (50,145)
Portfolio loans, net	$ 9,697,028	$ 9,463,608

Portfolio Loans - Status of Loa

Portfolio Loans - Status of Loans and TDRs (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Non-Performing loans:
Current loans	$ 9,675,432,000	$ 9,433,277,000
Non accrual loans	72,136,000	77,163,000
Portfolio loans	9,763,967,000	9,527,230,000
Current loans	15,741,000	11,032,000
30-59 days past due	0	253,000
60-89 days past due	0	0
90 plus days past due	128,000	0
Non-Accrual	2,530,000	1,989,000
Total	18,399,000	13,274,000
Nonperforming loans
Non-Performing loans:
Non accrual loans	72,136,000	77,163,000
Non-performing loans:
Loans 90 days past due and still accruing	788,000	1,690,000
Total non-performing loans	72,924,000	78,853,000
Traditional C&I
Non-Performing loans:
Current loans	1,441,001,000	1,376,181,000
Non accrual loans	26,082,000	26,386,000
Portfolio loans	1,469,130,000	1,404,774,000
Current loans	570,000	572,000
30-59 days past due	0	0
60-89 days past due	0	0
90 plus days past due	0	0
Non-Accrual	0	128,000
Total	570,000	700,000
Asset-based lending
Non-Performing loans:
Current loans	735,737,000	741,942,000
Non accrual loans	0	0
Portfolio loans	735,737,000	741,942,000
Payroll finance
Non-Performing loans:
Current loans	223,460,000	254,715,000
Non accrual loans	384,000	199,000
Portfolio loans	223,934,000	255,549,000
Warehouse lending
Non-Performing loans:
Current loans	486,381,000	616,946,000
Non accrual loans	0	0
Portfolio loans	486,381,000	616,946,000
Factored receivables
Non-Performing loans:
Current loans	191,206,000	213,624,000
Non accrual loans	192,000	618,000
Portfolio loans	191,398,000	214,242,000
Equipment financing
Non-Performing loans:
Current loans	657,646,000	583,835,000
Non accrual loans	2,704,000	2,246,000
Portfolio loans	662,844,000	589,315,000
Current loans	3,088,000	0
30-59 days past due	0	0
60-89 days past due	0	0
90 plus days past due	0	0
Non-Accrual	0	29,000
Total	3,088,000	29,000
Public sector finance
Non-Performing loans:
Current loans	412,394,000	349,182,000
Non accrual loans	0	0
Portfolio loans	412,394,000	349,182,000
Commercial real estate
Non-Performing loans:
Current loans	3,290,081,000	3,140,561,000
Non accrual loans	20,148,000	21,008,000
Portfolio loans	3,313,848,000	3,162,942,000
Current loans	4,275,000	2,443,000
30-59 days past due	0	253,000
60-89 days past due	0	0
90 plus days past due	128,000	0
Non-Accrual	0	0
Total	4,403,000	2,696,000
Multi-family
Non-Performing loans:
Current loans	1,062,732,000	981,005,000
Non accrual loans	65,000	71,000
Portfolio loans	1,062,797,000	981,076,000
ADC
Non-Performing loans:
Current loans	235,703,000	224,817,000
Non accrual loans	1,175,000	5,269,000
Portfolio loans	238,966,000	230,086,000
Current loans	5,574,000	5,962,000
30-59 days past due	0	0
60-89 days past due	0	0
90 plus days past due	0	0
Non-Accrual	1,175,000	458,000
Total	6,749,000	6,420,000
Residential mortgage
Non-Performing loans:
Current loans	677,587,000	675,750,000
Non accrual loans	14,389,000	14,790,000
Portfolio loans	695,398,000	697,108,000
Current loans	2,234,000	2,055,000
30-59 days past due	0	0
60-89 days past due	0	0
90 plus days past due	0	0
Non-Accrual	1,355,000	1,374,000
Total	3,589,000	3,429,000
Consumer
Non-Performing loans:
Current loans	261,504,000	274,719,000
Non accrual loans	6,997,000	6,576,000
Portfolio loans	271,140,000	284,068,000
30 to 59 Days Past Due
Non-Performing loans:
Past due loans	9,348,000	11,876,000
30 to 59 Days Past Due | Traditional C&I
Non-Performing loans:
Past due loans	758,000	835,000
30 to 59 Days Past Due | Asset-based lending
Non-Performing loans:
Past due loans	0	0
30 to 59 Days Past Due | Payroll finance
Non-Performing loans:
Past due loans	0	0
30 to 59 Days Past Due | Warehouse lending
Non-Performing loans:
Past due loans	0	0
30 to 59 Days Past Due | Factored receivables
Non-Performing loans:
Past due loans	0	0
30 to 59 Days Past Due | Equipment financing
Non-Performing loans:
Past due loans	1,476,000	2,142,000
30 to 59 Days Past Due | Public sector finance
Non-Performing loans:
Past due loans	0	0
30 to 59 Days Past Due | Commercial real estate
Non-Performing loans:
Past due loans	2,505,000	967,000
30 to 59 Days Past Due | Multi-family
Non-Performing loans:
Past due loans	0	0
30 to 59 Days Past Due | ADC
Non-Performing loans:
Past due loans	0	0
30 to 59 Days Past Due | Residential mortgage
Non-Performing loans:
Past due loans	2,279,000	5,509,000
30 to 59 Days Past Due | Consumer
Non-Performing loans:
Past due loans	2,330,000	2,423,000
60 to 89 Days Past Due
Non-Performing loans:
Past due loans	6,263,000	3,224,000
60 to 89 Days Past Due | Traditional C&I
Non-Performing loans:
Past due loans	1,015,000	817,000
60 to 89 Days Past Due | Asset-based lending
Non-Performing loans:
Past due loans	0	0
60 to 89 Days Past Due | Payroll finance
Non-Performing loans:
Past due loans	90,000	14,000
60 to 89 Days Past Due | Warehouse lending
Non-Performing loans:
Past due loans	0	0
60 to 89 Days Past Due | Factored receivables
Non-Performing loans:
Past due loans	0	0
60 to 89 Days Past Due | Equipment financing
Non-Performing loans:
Past due loans	1,018,000	1,092,000
60 to 89 Days Past Due | Public sector finance
Non-Performing loans:
Past due loans	0	0
60 to 89 Days Past Due | Commercial real estate
Non-Performing loans:
Past due loans	796,000	0
60 to 89 Days Past Due | Multi-family
Non-Performing loans:
Past due loans	0	0
60 to 89 Days Past Due | ADC
Non-Performing loans:
Past due loans	2,000,000	0
60 to 89 Days Past Due | Residential mortgage
Non-Performing loans:
Past due loans	1,035,000	951,000
60 to 89 Days Past Due | Consumer
Non-Performing loans:
Past due loans	309,000	350,000
90 or More Days Past Due
Non-Performing loans:
Past due loans	788,000	1,690,000
90 or More Days Past Due | Traditional C&I
Non-Performing loans:
Past due loans	274,000	555,000
90 or More Days Past Due | Asset-based lending
Non-Performing loans:
Past due loans	0	0
90 or More Days Past Due | Payroll finance
Non-Performing loans:
Past due loans	0	621,000
90 or More Days Past Due | Warehouse lending
Non-Performing loans:
Past due loans	0	0
90 or More Days Past Due | Factored receivables
Non-Performing loans:
Past due loans	0	0
90 or More Days Past Due | Equipment financing
Non-Performing loans:
Past due loans	0	0
90 or More Days Past Due | Public sector finance
Non-Performing loans:
Past due loans	0	0
90 or More Days Past Due | Commercial real estate
Non-Performing loans:
Past due loans	318,000	406,000
90 or More Days Past Due | Multi-family
Non-Performing loans:
Past due loans	0	0
90 or More Days Past Due | ADC
Non-Performing loans:
Past due loans	88,000	0
90 or More Days Past Due | Residential mortgage
Non-Performing loans:
Past due loans	108,000	108,000
90 or More Days Past Due | Consumer
Non-Performing loans:
Past due loans	$ 0	$ 0

Portfolio Loans - Nonaccrual Lo

Portfolio Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	$ 72,136	$ 77,163
Non-accrual loans, unpaid principal balance	83,465	86,592
Traditional C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	26,082	26,386
Non-accrual loans, unpaid principal balance	26,606	26,386
Payroll finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	384	199
Non-accrual loans, unpaid principal balance	1,746	199
Factored receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	192	618
Non-accrual loans, unpaid principal balance	192	618
Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	2,704	2,246
Non-accrual loans, unpaid principal balance	2,704	2,246
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	20,148	21,008
Non-accrual loans, unpaid principal balance	25,229	25,619
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	65	71
Non-accrual loans, unpaid principal balance	71	71
ADC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	1,175	5,269
Non-accrual loans, unpaid principal balance	1,310	5,398
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	14,389	14,790
Non-accrual loans, unpaid principal balance	17,361	18,190
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	6,997	6,576
Non-accrual loans, unpaid principal balance	8,246	7,865
Receivables without deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	59,976	64,922
Receivables without deteriorated credit quality | Traditional C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	22,047	22,338
Receivables without deteriorated credit quality | Payroll finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	384	199
Receivables without deteriorated credit quality | Factored receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	192	618
Receivables without deteriorated credit quality | Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	2,704	2,246
Receivables without deteriorated credit quality | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	14,254	15,063
Receivables without deteriorated credit quality | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	65	71
Receivables without deteriorated credit quality | ADC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	1,175	5,269
Receivables without deteriorated credit quality | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	13,008	13,399
Receivables without deteriorated credit quality | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	6,147	5,719
Receivables acquired with deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	12,160	12,241
Receivables acquired with deteriorated credit quality | Traditional C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	4,035	4,048
Receivables acquired with deteriorated credit quality | Payroll finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	0	0
Receivables acquired with deteriorated credit quality | Factored receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	0	0
Receivables acquired with deteriorated credit quality | Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	0	0
Receivables acquired with deteriorated credit quality | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	5,894	5,945
Receivables acquired with deteriorated credit quality | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	0	0
Receivables acquired with deteriorated credit quality | ADC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	0	0
Receivables acquired with deteriorated credit quality | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	1,381	1,391
Receivables acquired with deteriorated credit quality | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non accrual loans	$ 850	$ 857

Portfolio Loans - Loans Evaluat

Portfolio Loans - Loans Evaluated for Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	$ 54,707	$ 55,391
Loans evaluated by segment, Collectively evaluated for impairment	9,625,170	9,382,931
Portfolio loans	9,763,967	9,527,230
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	66,939	63,622
Total allowance for loan losses	66,939	63,622
PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	84,090	88,908
Traditional C&I
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	24,975	25,221
Loans evaluated by segment, Collectively evaluated for impairment	1,430,558	1,365,466
Portfolio loans	1,469,130	1,404,774
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	14,441	12,864
Total allowance for loan losses	14,441	12,864
Traditional C&I | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	13,597	14,087
Asset-based lending
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	0	0
Loans evaluated by segment, Collectively evaluated for impairment	720,242	724,247
Portfolio loans	735,737	741,942
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	3,353	3,316
Total allowance for loan losses	3,353	3,316
Asset-based lending | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	15,495	17,695
Payroll finance
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	0	570
Loans evaluated by segment, Collectively evaluated for impairment	223,934	254,979
Portfolio loans	223,934	255,549
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	1,155	951
Total allowance for loan losses	1,155	951
Payroll finance | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	0	0
Warehouse lending
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	0	0
Loans evaluated by segment, Collectively evaluated for impairment	486,381	616,946
Portfolio loans	486,381	616,946
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	1,227	1,563
Total allowance for loan losses	1,227	1,563
Warehouse lending | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	0	0
Factored receivables
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	0	0
Loans evaluated by segment, Collectively evaluated for impairment	191,398	214,242
Portfolio loans	191,398	214,242
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	1,322	1,669
Total allowance for loan losses	1,322	1,669
Factored receivables | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	0	0
Equipment financing
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	4,952	1,413
Loans evaluated by segment, Collectively evaluated for impairment	657,892	587,902
Portfolio loans	662,844	589,315
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	6,039	5,039
Total allowance for loan losses	6,039	5,039
Equipment financing | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	0	0
Public sector finance
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	0		$ 0
Loans evaluated by segment, Collectively evaluated for impairment	412,394		349,182
Portfolio loans	412,394	349,182
Allowance evaluated by segment, Individually evaluated for impairment	0		0
Allowance evaluated by segment, Collectively evaluated for impairment	1,249		1,062
Total allowance for loan losses	1,249	1,062
Public sector finance | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	0		$ 0
Commercial real estate
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	14,787	14,853
Loans evaluated by segment, Collectively evaluated for impairment	3,256,578	3,104,057
Portfolio loans	3,313,848	3,162,942
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	23,438	20,466
Total allowance for loan losses	23,438	20,466
Commercial real estate | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	42,483	44,032
Multi-family
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	0	0
Loans evaluated by segment, Collectively evaluated for impairment	1,058,455	976,710
Portfolio loans	1,062,797	981,076
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	4,102	4,991
Total allowance for loan losses	4,102	4,991
Multi-family | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	4,342	4,366
ADC
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	5,951	9,025
Loans evaluated by segment, Collectively evaluated for impairment	227,986	216,094
Portfolio loans	238,966	230,086
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	1,170	1,931
Total allowance for loan losses	1,170	1,931
ADC | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	5,029	4,967
Residential mortgage
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	2,545	2,545
Loans evaluated by segment, Collectively evaluated for impairment	691,307	692,396
Portfolio loans	695,398	697,108
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	5,715	5,864
Total allowance for loan losses	5,715	5,864
Residential mortgage | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	1,546	2,167
Consumer
Loans evaluated for impairment by segment
Loans evaluated by segment, Individually evaluated for impairment	1,497	1,764
Loans evaluated by segment, Collectively evaluated for impairment	268,045	280,710
Portfolio loans	271,140	284,068
Allowance evaluated by segment, Individually evaluated for impairment	0	0
Allowance evaluated by segment, Collectively evaluated for impairment	3,728	3,906
Total allowance for loan losses	3,728	3,906
Consumer | PCI Loans
Loans evaluated for impairment by segment
Loans evaluated by segment, Purchased credit impaired loans	$ 1,598	$ 1,594

Portfolio Loans - Accretable Yi

Portfolio Loans - Accretable Yield Discount for PCI Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 11,117	$ 11,211
Balances acquired in the NSBC Acquisition	0	2,200
Accretion of income	(1,199)	(1,155)
Disposals	0	0
Reclassification from non-accretable difference	815	266
Balance at end of period	$ 10,733	$ 12,522

Portfolio Loans - Loans Individ

Portfolio Loans - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
With no related allowance recorded:
Unpaid principal balance with no related allowance recorded	$ 58,782	$ 56,903
Recorded investment with no related allowance recorded	54,707	55,391
Traditional C&I
With no related allowance recorded:
Unpaid principal balance with no related allowance recorded	25,355	25,221
Recorded investment with no related allowance recorded	24,975	25,221
Payroll finance
With no related allowance recorded:
Unpaid principal balance with no related allowance recorded	0	570
Recorded investment with no related allowance recorded	0	570
Equipment financing
With no related allowance recorded:
Unpaid principal balance with no related allowance recorded	4,952	1,413
Recorded investment with no related allowance recorded	4,952	1,413
Commercial real estate
With no related allowance recorded:
Unpaid principal balance with no related allowance recorded	18,225	16,365
Recorded investment with no related allowance recorded	14,787	14,853
ADC
With no related allowance recorded:
Unpaid principal balance with no related allowance recorded	6,208	9,025
Recorded investment with no related allowance recorded	5,951	9,025
Residential mortgage
With no related allowance recorded:
Unpaid principal balance with no related allowance recorded	2,545	2,545
Recorded investment with no related allowance recorded	2,545	2,545
Consumer
With no related allowance recorded:
Unpaid principal balance with no related allowance recorded	1,497	1,764
Recorded investment with no related allowance recorded	$ 1,497	$ 1,764

Portfolio Loans - Average Recor

Portfolio Loans - Average Recorded Investment and Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Impaired [Line Items]
Average recorded investment with no related allowance	$ 50,229	$ 40,551
Interest income recognized with no related allowance	98	104
Traditional C&I
Financing Receivable, Impaired [Line Items]
Average recorded investment with no related allowance	24,912	15,366
Interest income recognized with no related allowance	7	9
Equipment financing
Financing Receivable, Impaired [Line Items]
Average recorded investment with no related allowance	1,638	1,288
Interest income recognized with no related allowance	0	0
Commercial real estate
Financing Receivable, Impaired [Line Items]
Average recorded investment with no related allowance	14,124	13,118
Interest income recognized with no related allowance	40	39
Multi-family
Financing Receivable, Impaired [Line Items]
Average recorded investment with no related allowance	0	884
Interest income recognized with no related allowance	0	0
ADC
Financing Receivable, Impaired [Line Items]
Average recorded investment with no related allowance	5,513	8,632
Interest income recognized with no related allowance	51	56
Residential mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment with no related allowance	2,545	515
Interest income recognized with no related allowance	0	0
Consumer
Financing Receivable, Impaired [Line Items]
Average recorded investment with no related allowance	1,497	748
Interest income recognized with no related allowance	$ 0	$ 0

Portfolio Loans - Past Due Stat

Portfolio Loans - Past Due Status (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Current loans	$ 15,741	$ 11,032
30-59 days past due	0	253
60-89 days past due	0	0
90 plus days past due	128	0
Non- accrual	2,530	1,989
Total	18,399	13,274
Traditional C&I
Financing Receivable, Modifications [Line Items]
Current loans	570	572
30-59 days past due	0	0
60-89 days past due	0	0
90 plus days past due	0	0
Non- accrual	0	128
Total	570	700
Equipment financing
Financing Receivable, Modifications [Line Items]
Current loans	3,088	0
30-59 days past due	0	0
60-89 days past due	0	0
90 plus days past due	0	0
Non- accrual	0	29
Total	3,088	29
Commercial real estate
Financing Receivable, Modifications [Line Items]
Current loans	4,275	2,443
30-59 days past due	0	253
60-89 days past due	0	0
90 plus days past due	128	0
Non- accrual	0	0
Total	4,403	2,696
ADC
Financing Receivable, Modifications [Line Items]
Current loans	5,574	5,962
30-59 days past due	0	0
60-89 days past due	0	0
90 plus days past due	0	0
Non- accrual	1,175	458
Total	6,749	6,420
Residential mortgage
Financing Receivable, Modifications [Line Items]
Current loans	2,234	2,055
30-59 days past due	0	0
60-89 days past due	0	0
90 plus days past due	0	0
Non- accrual	1,355	1,374
Total	$ 3,589	$ 3,429

Portfolio Loans - Loans Modifie

Portfolio Loans - Loans Modified as TDRs (Details ) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)loan	Mar. 31, 2016USD ($)loan
Financing Receivable, Modifications [Line Items]
Number | loan	6	1
Recorded investment, Pre-modification	$ 5,848	$ 469
Recorded investment, Post-modification	$ 5,848	$ 469
Equipment financing
Financing Receivable, Modifications [Line Items]
Number | loan	2	0
Recorded investment, Pre-modification	$ 3,088	$ 0
Recorded investment, Post-modification	$ 3,089	$ 0
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number | loan	2	0
Recorded investment, Pre-modification	$ 1,724	$ 0
Recorded investment, Post-modification	$ 1,724	$ 0
ADC
Financing Receivable, Modifications [Line Items]
Number | loan	1	0
Recorded investment, Pre-modification	$ 797	$ 0
Recorded investment, Post-modification	$ 797	$ 0
Residential mortgage
Financing Receivable, Modifications [Line Items]
Number | loan	1	1
Recorded investment, Pre-modification	$ 239	$ 469
Recorded investment, Post-modification	$ 238	$ 469

Portfolio Loans - Narrative (De

Portfolio Loans - Narrative (Details)	3 Months Ended
	Mar. 31, 2017USD ($)loan	Mar. 31, 2016USD ($)loan	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Net deferred loan origination costs	$ 3,725,000		$ 1,788,000
Bank pledged mortgages - unpaid principal balance	2,489,394,000		2,349,604,000
Non accrual loans	72,136,000		77,163,000
Maximum outstanding balance of loan to be evaluated for impairment on a homogeneous pool basis	500,000
Loans included in allowance for loan losses	66,939,000	$ 53,014,000	63,622,000	$ 50,145,000
Impaired loans with an allowance recorded	$ 0		0
Loans modified by TDR | loan	6	1
TDRs modified and subsequently defaulted | loan	0	0
PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Non accrual loans	$ 12,160,000		12,241,000
Loans evaluated by segment, Purchased credit impaired loans	84,090,000		88,908,000
Loans included in allowance for loan losses	724,000		685,000
Balance of PCI loans treated under cost recovery method	12,160,000		12,241,000
Asset-based lending
Financing Receivable, Allowance for Credit Losses [Line Items]
Non accrual loans	0		0
Loans included in allowance for loan losses	3,353,000	$ 2,809,000	3,316,000	2,793,000
Asset-based lending | PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans evaluated by segment, Purchased credit impaired loans	15,495,000		17,695,000
Asset-based lending | PCI Loans | NSBC
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans evaluated by segment, Purchased credit impaired loans	15,495,000
Warehouse lending
Financing Receivable, Allowance for Credit Losses [Line Items]
Non accrual loans	0		0
Loans included in allowance for loan losses	1,227,000	520,000	1,563,000	589,000
Warehouse lending | PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans evaluated by segment, Purchased credit impaired loans	0		0
Residential mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Non accrual loans	14,389,000		14,790,000
Loans formally in process of foreclosure	9,604,000		9,263,000
Loans included in allowance for loan losses	$ 5,715,000	$ 4,850,000	5,864,000	5,007,000
Loans modified by TDR | loan	1	1
Residential mortgage | PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Non accrual loans	$ 1,381,000		1,391,000
Loans evaluated by segment, Purchased credit impaired loans	1,546,000		2,167,000
Traditional C&I
Financing Receivable, Allowance for Credit Losses [Line Items]
Non accrual loans	26,082,000		26,386,000
Loans included in allowance for loan losses	14,441,000	$ 10,905,000	12,864,000	9,922,000
Traditional C&I | PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Non accrual loans	4,035,000		4,048,000
Loans evaluated by segment, Purchased credit impaired loans	13,597,000		14,087,000
Public sector finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Non accrual loans	0		0
Loans included in allowance for loan losses	1,249,000	555,000	$ 1,062,000	$ 547,000
Public sector finance | PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans evaluated by segment, Purchased credit impaired loans	$ 0	$ 0

Allowance for Loan Losses - All

Allowance for Loan Losses - Allowance Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	$ 63,622	$ 50,145
Charge-offs	(1,809)	(1,766)
Recoveries	626	635
Net Charge-offs	(1,183)	(1,131)
Provision	4,500	4,000
Ending Allowance for Loan Losses	$ 66,939	$ 53,014
Annualized net charge-offs to average loans outstanding	0.05%	0.06%
Traditional C&I
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	$ 12,864	$ 9,922
Charge-offs	(687)	(489)
Recoveries	139	313
Net Charge-offs	(548)	(176)
Provision	2,125	1,159
Ending Allowance for Loan Losses	14,441	10,905
Asset-based lending
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	3,316	2,793
Charge-offs	0	0
Recoveries	3	16
Net Charge-offs	3	16
Provision	34	0
Ending Allowance for Loan Losses	3,353	2,809
Payroll finance
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	951	1,936
Charge-offs	0	0
Recoveries	0	4
Net Charge-offs	0	4
Provision	204	(394)
Ending Allowance for Loan Losses	1,155	1,546
Warehouse lending
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	1,563	589
Charge-offs	0	0
Recoveries	0	0
Net Charge-offs	0	0
Provision	(336)	(69)
Ending Allowance for Loan Losses	1,227	520
Factored receivables
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	1,669	1,457
Charge-offs	(296)	(81)
Recoveries	16	24
Net Charge-offs	(280)	(57)
Provision	(67)	7
Ending Allowance for Loan Losses	1,322	1,407
Equipment financing
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	5,039	4,925
Charge-offs	(471)	(457)
Recoveries	140	108
Net Charge-offs	(331)	(349)
Provision	1,331	817
Ending Allowance for Loan Losses	6,039	5,393
Public sector finance
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	1,062	547
Charge-offs	0	0
Recoveries	0	0
Net Charge-offs	0	0
Provision	187	8
Ending Allowance for Loan Losses	1,249	555
Commercial real estate
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	20,466	13,861
Charge-offs	(83)	(4)
Recoveries	2	21
Net Charge-offs	(81)	17
Provision	3,053	1,892
Ending Allowance for Loan Losses	23,438	15,770
Multi-family
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	4,991	2,741
Charge-offs	0	0
Recoveries	0	2
Net Charge-offs	0	2
Provision	(889)	253
Ending Allowance for Loan Losses	4,102	2,996
ADC
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	1,931	2,009
Charge-offs	0	0
Recoveries	136	0
Net Charge-offs	136	0
Provision	(897)	148
Ending Allowance for Loan Losses	1,170	2,157
Residential mortgage
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	5,864	5,007
Charge-offs	(158)	(224)
Recoveries	149	28
Net Charge-offs	(9)	(196)
Provision	(140)	39
Ending Allowance for Loan Losses	5,715	4,850
Consumer
Summary of activity in allowance for loan losses and recorded investments in loans by portfolio segment based on impairment method
Beginning Allowance for loan losses	3,906	4,358
Charge-offs	(114)	(511)
Recoveries	41	119
Net Charge-offs	(73)	(392)
Provision	(105)	140
Ending Allowance for Loan Losses	$ 3,728	$ 4,106

Allowance for Loan Losses - Val

Allowance for Loan Losses - Valuation Allowances Recorded Against Portfolio Loans (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 72,136,000	$ 77,163,000
Allowance for loan losses	66,939,000	63,622,000	$ 53,014,000	$ 50,145,000
Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	8,771,392,000	8,325,182,000
Allowance for loan losses	$ 66,939,000	$ 63,622,000
As a percent of loans	0.76%	0.76%
Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 9,763,967,000	$ 9,527,230,000
Total loans subject to purchase accounting marks	992,575,000	1,202,048,000
Remaining purchase accounting mark	$ 34,183,000	$ 37,012,000
As a percent of acquired loans	3.44%	3.08%
Traditional C&I
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 26,082,000	$ 26,386,000
Allowance for loan losses	14,441,000	12,864,000	10,905,000	9,922,000
Traditional C&I | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	1,138,783,000	1,043,647,000
Traditional C&I | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	330,347,000	361,127,000
Asset-based lending
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Allowance for loan losses	3,353,000	3,316,000	2,809,000	2,793,000
Asset-based lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	584,125,000	562,898,000
Asset-based lending | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	151,612,000	179,044,000
Payroll finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	384,000	199,000
Allowance for loan losses	1,155,000	951,000	1,546,000	1,936,000
Payroll finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	223,934,000	255,549,000
Factored receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	192,000	618,000
Allowance for loan losses	1,322,000	1,669,000	1,407,000	1,457,000
Factored receivables | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	191,398,000	214,242,000
Equipment financing
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,704,000	2,246,000
Allowance for loan losses	6,039,000	5,039,000	5,393,000	4,925,000
Equipment financing | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	640,221,000	562,047,000
Equipment financing | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	22,623,000	27,268,000
Public sector finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Allowance for loan losses	1,249,000	1,062,000	555,000	547,000
Public sector finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	412,394,000
Financing Receivable, Recorded Investment, Nonaccrual Status		349,182,000
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	20,148,000	21,008,000
Allowance for loan losses	23,438,000	20,466,000	15,770,000	13,861,000
Warehouse lending
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Allowance for loan losses	1,227,000	1,563,000	520,000	589,000
Warehouse lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	486,381,000	616,946,000
Commercial real estate | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	3,155,770,000	2,900,928,000
Commercial real estate | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	158,078,000	262,014,000
Multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	65,000	71,000
Allowance for loan losses	4,102,000	4,991,000	2,996,000	2,741,000
Multi-family | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	983,303,000	868,980,000
Multi-family | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	79,494,000	112,096,000
ADC
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,175,000	5,269,000
Allowance for loan losses	1,170,000	1,931,000	2,157,000	2,009,000
ADC | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	238,966,000	230,086,000
Residential mortgage | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	527,666,000	521,332,000
Residential mortgage | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	167,732,000	175,776,000
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	6,997,000	6,576,000
Allowance for loan losses	3,728,000	3,906,000	4,106,000	4,358,000
Consumer | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	188,451,000	199,345,000
Consumer | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	82,689,000	84,723,000
Residential mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	14,389,000	14,790,000
Allowance for loan losses	5,715,000	5,864,000	$ 4,850,000	$ 5,007,000
Pass | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	8,614,157,000	8,194,040,000
Allowance for loan losses	$ 60,193,000	$ 58,217,000
As a percent of loans	0.70%	0.71%
Pass | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 9,550,737,000	$ 9,327,067,000
Total loans subject to purchase accounting marks	936,580,000	1,133,027,000
Remaining purchase accounting mark	$ 31,433,000	$ 34,322,000
As a percent of acquired loans	3.36%	3.03%
Pass | Traditional C&I | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 1,085,899,000	$ 1,009,605,000
Pass | Traditional C&I | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	324,748,000	353,625,000
Pass | Asset-based lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	573,159,000	545,220,000
Pass | Asset-based lending | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	145,365,000	161,349,000
Pass | Payroll finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	203,878,000	254,729,000
Pass | Factored receivables | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	191,141,000	213,624,000
Pass | Equipment financing | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	632,705,000	556,522,000
Pass | Equipment financing | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	22,623,000	27,268,000
Pass | Public sector finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	412,394,000	349,182,000
Pass | Warehouse lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	486,381,000	616,946,000
Pass | Commercial real estate | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	3,125,759,000	2,869,306,000
Pass | Commercial real estate | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	121,510,000	224,983,000
Pass | Multi-family | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	981,170,000	866,825,000
Pass | Multi-family | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	73,949,000	106,521,000
Pass | ADC | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	227,525,000	214,317,000
Pass | Residential mortgage | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	513,168,000	505,803,000
Pass | Residential mortgage | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	165,696,000	174,558,000
Pass | Consumer | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	180,978,000	191,961,000
Pass | Consumer | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	82,689,000	84,723,000
Special mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	110,832,000	104,569,000
Special mention | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	66,850,000	47,580,000
Allowance for loan losses	$ 2,010,000	$ 1,423,000
As a percent of loans	3.01%	2.99%
Special mention | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 110,832,000	$ 104,569,000
Total loans subject to purchase accounting marks	43,982,000	56,989,000
Remaining purchase accounting mark	$ 1,759,000	$ 1,725,000
As a percent of acquired loans	4.00%	3.03%
Special mention | Traditional C&I
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 15,839,000	$ 12,125,000
Special mention | Traditional C&I | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	10,525,000	5,104,000
Special mention | Traditional C&I | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	5,314,000	7,021,000
Special mention | Asset-based lending
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	17,213,000	35,373,000
Special mention | Asset-based lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	10,966,000	17,678,000
Special mention | Asset-based lending | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	6,247,000	17,695,000
Special mention | Payroll finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	19,672,000	0
Special mention | Payroll finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	19,672,000	0
Special mention | Factored receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	65,000	185,000
Special mention | Factored receivables | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	65,000	185,000
Special mention | Equipment financing
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	4,812,000	2,128,000
Special mention | Equipment financing | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	4,812,000	2,128,000
Special mention | Equipment financing | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Special mention | Public sector finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Special mention | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	38,235,000	39,190,000
Special mention | Warehouse lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Special mention | Commercial real estate | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	11,908,000	12,492,000
Special mention | Commercial real estate | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	26,327,000	26,698,000
Special mention | Multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	7,028,000	7,072,000
Special mention | Multi-family | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	1,483,000	1,497,000
Special mention | Multi-family | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	5,545,000	5,575,000
Special mention | ADC
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	6,620,000	6,899,000
Special mention | ADC | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	6,620,000	6,899,000
Special mention | Residential mortgage | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	486,000	951,000
Special mention | Residential mortgage | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	549,000	0
Special mention | Consumer | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	313,000	646,000
Special mention | Consumer | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Special mention | Residential mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	1,035,000	951,000
Special mention | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	313,000	646,000
Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	101,496,000	95,152,000
Substandard | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	89,483,000	83,120,000
Allowance for loan losses	$ 4,061,000	$ 3,650,000
As a percent of loans	4.54%	4.39%
Substandard | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 101,496,000	$ 95,152,000
Total loans subject to purchase accounting marks	12,013,000	12,032,000
Remaining purchase accounting mark	$ 991,000	$ 965,000
As a percent of acquired loans	8.25%	8.02%
Substandard | Traditional C&I
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 41,742,000	$ 28,977,000
Substandard | Traditional C&I | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	41,457,000	28,496,000
Substandard | Traditional C&I | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	285,000	481,000
Substandard | Asset-based lending
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Substandard | Asset-based lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Substandard | Asset-based lending | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Substandard | Payroll finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	384,000	820,000
Substandard | Payroll finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	384,000	820,000
Substandard | Factored receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	192,000	433,000
Substandard | Factored receivables | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	192,000	433,000
Substandard | Equipment financing
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	2,704,000	3,397,000
Substandard | Equipment financing | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	2,704,000	3,397,000
Substandard | Equipment financing | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Substandard | Public sector finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Substandard | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	28,344,000	29,463,000
Substandard | Warehouse lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Substandard | Commercial real estate | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	18,103,000	19,130,000
Substandard | Commercial real estate | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	10,241,000	10,333,000
Substandard | Multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	650,000	658,000
Substandard | Multi-family | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	650,000	658,000
Substandard | Multi-family | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Substandard | ADC
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	4,821,000	8,870,000
Substandard | ADC | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	4,821,000	8,870,000
Substandard | Residential mortgage | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	14,012,000	14,578,000
Substandard | Residential mortgage | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	1,487,000	1,218,000
Substandard | Consumer | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	7,160,000	6,738,000
Substandard | Consumer | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Substandard | Residential mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	15,499,000	15,796,000
Substandard | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	7,160,000	6,738,000
Doubtful
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	902,000	442,000
Doubtful | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	902,000	442,000
Allowance for loan losses	$ 675,000	$ 332,000
As a percent of loans	74.83%	75.11%
Doubtful | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 902,000	$ 442,000
Total loans subject to purchase accounting marks	0	0
Remaining purchase accounting mark	$ 0	$ 0
As a percent of acquired loans	0.00%	0.00%
Doubtful | Traditional C&I
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 902,000	$ 442,000
Doubtful | Traditional C&I | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	902,000	442,000
Doubtful | Traditional C&I | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Doubtful | Asset-based lending
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Asset-based lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Asset-based lending | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Doubtful | Payroll finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Payroll finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Factored receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Factored receivables | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Equipment financing
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Equipment financing | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Equipment financing | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Doubtful | Public sector finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Warehouse lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Commercial real estate | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Commercial real estate | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Doubtful | Multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Multi-family | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Multi-family | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Doubtful | ADC
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | ADC | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Residential mortgage | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Residential mortgage | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Doubtful | Consumer | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Consumer | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Doubtful | Residential mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Doubtful | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Allowance for loan losses	$ 0	$ 0
As a percent of loans	0.00%	0.00%
Loss | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 0	$ 0
Total loans subject to purchase accounting marks	0	0
Remaining purchase accounting mark	$ 0	$ 0
As a percent of acquired loans	0.00%	0.00%
Loss | Traditional C&I | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 0	$ 0
Loss | Traditional C&I | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Loss | Asset-based lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Asset-based lending | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Loss | Payroll finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Factored receivables | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Equipment financing | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Equipment financing | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Loss | Public sector finance | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Warehouse lending | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Commercial real estate | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Commercial real estate | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Loss | Multi-family | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Multi-family | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Loss | ADC | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Residential mortgage | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Residential mortgage | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	0	0
Loss | Consumer | Originated
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	0	0
Loss | Consumer | Acquired
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans subject to purchase accounting marks	$ 0	$ 0

Allowance for Loan Losses - Add

Allowance for Loan Losses - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Maximum loan balance for credit risk to be evaluated on a homogeneous basis	$ 500,000
Loss
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment		$ 0
Special mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	110,832,000	104,569,000
Special mention | Asset-based lending
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	17,213,000	35,373,000
Special mention | Asset-based lending | NSBC
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	10,952,000
Special mention | Traditional C&I
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans by segment	$ 15,839,000	$ 12,125,000

Goodwill and Other Intangible69

Goodwill and Other Intangible Assets - Balance of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 696,600	$ 696,600
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	64,098	66,353
Core deposits
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	35,808	37,455
Customer lists
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	7,226	7,683
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	500	625
Trade name
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	20,500	20,500
Fair value of below market leases
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 64	$ 90

Goodwill and Other Intangible70

Goodwill and Other Intangible Assets - Future Amortization Expense (Details) $ in Thousands	Mar. 31, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2017	$ 6,583
2,018	7,285
2,019	6,074
2,020	5,428
2,021	5,022
2,022	4,522
Thereafter	8,684
Total	$ 43,598

Deposits - Deposit Balances (De

Deposits - Deposit Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Non-interest bearing demand	$ 3,196,841	$ 3,239,332
Interest bearing demand	2,217,719	2,220,456
Savings	801,887	747,031
Money market	3,488,716	3,277,686
Certificates of deposit	546,562	583,754
Total deposits	$ 10,251,725	$ 10,068,259

Deposits - Brokered Deposits (D

Deposits - Brokered Deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
List of Company's Brokered deposits
Brokered deposits	$ 810,075	$ 831,629
Interest bearing demand
List of Company's Brokered deposits
Brokered deposits	368,055	426,437
Money market
List of Company's Brokered deposits
Brokered deposits	244,722	246,572
Money market - reciprocal brokered deposits
List of Company's Brokered deposits
Brokered deposits	156,122	153,060
Savings
List of Company's Brokered deposits
Brokered deposits	8,000	5,560
Certificates of deposit - CDARs one way
List of Company's Brokered deposits
Brokered deposits	$ 33,176	$ 0

Deposits - Narrative (Details)

Deposits - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Municipal deposits	$ 1,391,221	$ 1,270,921

Borrowings - Borrowings and Wei

Borrowings - Borrowings and Weighted Average Interest Rates (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016	Jul. 02, 2013
By period to maturity:
Less than one year, Amount	$ 1,469,472,000	$ 1,397,642,000
Less than one year, Rate	1.05%	0.87%
One to two years, Amount	$ 436,551,000	$ 311,469,000
One to two years, Rate	2.21%	2.53%
Two to three years, Amount	$ 150,000,000	$ 75,000,000
Two to three years, Rate	1.53%	1.50%
Three to four years, Amount	$ 100,000,000	$ 50,000,000
Three to four years, Rate	1.80%	1.38%
Four to five years, Amount	$ 0	$ 50,000,000
Four to five years, Rate	0.00%	1.68%
Greater than five years, Amount	$ 172,553,000	$ 172,501,000
Greater than five years, Rate	5.45%	5.45%
Total borrowings, Amount	$ 2,328,576,000	$ 2,056,612,000
Total borrowings, Rate	1.66%	1.56%
FHLB borrowings
By period to maturity:
Total borrowings, Amount	$ 2,035,000,000	$ 1,791,000,000
Total borrowings, Rate	1.19%	1.01%
Repurchase agreements
By period to maturity:
Total borrowings, Amount	$ 24,472,000	$ 16,642,000
Total borrowings, Rate	0.73%	0.75%
Federal funds purchased
By period to maturity:
Total borrowings, Amount	$ 20,000,000	$ 0
Total borrowings, Rate	1.03%	0.00%
Senior Notes
By period to maturity:
Total borrowings, Amount	$ 76,551,000	$ 76,469,000	$ 100,000,000
Total borrowings, Rate	5.98%	5.98%
Subordinated Notes
By period to maturity:
Total borrowings, Amount	$ 172,553,000	$ 172,501,000
Total borrowings, Rate	5.45%	5.45%

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - USD ($)	Sep. 02, 2016	Jun. 28, 2016	Mar. 29, 2016	Jul. 02, 2013	Mar. 31, 2017	Dec. 31, 2016	Sep. 05, 2016	Mar. 31, 2016
Debt Instrument [Line Items]
Bank pledged mortgages					$ 2,489,394,000	$ 2,349,604,000
Increased borrowing capacity by pledging securities					1,816,546,000
Long-term debt					$ 2,328,576,000	$ 2,056,612,000
Private placement discount rate				1.75%
Interest expense cost over the life of Senior note					5.98%
Minimum
Debt Instrument [Line Items]
Repurchase agreements maturity					1 day	1 day
Maximum
Debt Instrument [Line Items]
Repurchase agreements maturity					45 days	45 days
FHLB Borrowings
Debt Instrument [Line Items]
Unused borrowing capacity					$ 594,535,000
Long-term debt					2,035,000,000	$ 1,791,000,000
Federal funds purchased
Debt Instrument [Line Items]
Long-term debt					20,000,000	0
Senior Notes
Debt Instrument [Line Items]
Long-term debt				$ 100,000,000	76,551,000	76,469,000
Fixed interest rate (percent)				5.50%
Debt issuance costs				$ 303,000
Unamortized discount					449,000			$ 531,000
Amount of debt redeemed					23,000,000
Subordinated notes
Debt Instrument [Line Items]
Long-term debt					172,553,000	172,501,000
Private placement discount rate	1.25%		1.25%
Debt issuance costs	$ 275,000		$ 500,000
Unamortized discount					$ 2,447,000
Principal amount	$ 65,000,000		$ 110,000,000
Interest rate			5.25%
Issue premium	0.50%
Effective yield					5.45%
Subordinated notes | Three-month LIBOR
Debt Instrument [Line Items]
Basis spread on one-month LIBOR			3.937%
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving line of credit amount							$ 25,000,000
Revolving line of credit balance					$ 0	$ 0
Required balance		$ 0
Duration of minimum outstanding balance		30 days
Line of Credit | London Interbank Offered Rate (LIBOR) | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on one-month LIBOR		1.25%

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) $ in Thousands	Mar. 31, 2017USD ($)
Derivative Instruments and Hedges, Assets [Abstract]
Cash paid as settled0to-market for net fair value of CME interest rate swaps	$ 3,335

Derivatives - Derivative Inform

Derivatives - Derivative Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Other assets
Summary of derivatives
Notional amount	$ 376,982
Average maturity (in years)	5 years 5 months 15 days
Weighted average fixed rate	3.88%
Fair value	$ 2,462
Other liabilities
Summary of derivatives
Notional amount	$ 376,982
Average maturity (in years)	5 years 5 months 15 days
Weighted average fixed rate	3.88%
Fair value	$ (5,797)
3rd party interest rate swap
Summary of derivatives
Notional amount		$ 296,282
Average maturity (in years)		5 years 7 months 18 days
Weighted average fixed rate		3.94%
Fair value		$ 2,088
3rd party interest rate swap | One Month Libor
Summary of derivatives
Basis spread	2.26%	2.29%
3rd party interest rate swap | Other assets
Summary of derivatives
Notional amount	$ 181,122
Fair value	595
3rd party interest rate swap | Other liabilities
Summary of derivatives
Notional amount	195,860
Fair value	$ (1,768)
Customer interest rate swap
Summary of derivatives
Notional amount		$ 296,282
Average maturity (in years)		5 years 7 months 18 days
Weighted average fixed rate		3.94%
Fair value		$ (2,088)
Customer interest rate swap | One Month Libor
Summary of derivatives
Basis spread	2.26%	2.29%
Customer interest rate swap | Other assets
Summary of derivatives
Notional amount	$ 195,860
Fair value	1,867
Customer interest rate swap | Other liabilities
Summary of derivatives
Notional amount	181,122
Fair value	$ (4,029)

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Efftective tax rate reconciliation:
Income before income tax expense	$ 56,776,000	$ 36,009,000
Federal statutory rate	35.00%	35.00%
Tax at Federal statutory rate of 35%	$ 19,872,000	$ 12,603,000
State and local income taxes, net of Federal tax benefit	2,274,000	1,993,000
Tax-exempt interest, net of disallowed interest	(3,484,000)	(1,834,000)
Bank owned life insurance income	(462,000)	(445,000)
Non-deductible acquisition related costs	342,000	0
Low income housing tax credits	(139,000)	(54,000)
Stock-based compensation benefit	(742,000)	0
Other, net	48,000	(20,000)
Actual income tax expense	$ 17,709,000	$ 12,243,000
Effective income tax rate	31.20%	34.00%
Components of deferred tax assets and liabilities:
Net deferred tax asset	$ 35,502,000		$ 40,548,000
Valuation allowance	$ 0		$ 0

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-based Compensation Activity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Shares available for grant
Beginning balance (in shares)	3,639,838
Granted (in shares)	(360,867)
Stock awards vested (in shares)	0
Forfeited (in shares)	1,291
Canceled/expired (in shares)	(499)
Ending balance (in shares)	3,279,763
Stock options outstanding - Number of shares
Beginning balance (in shares)	1,004,119
Granted (in shares)	0	0
Exercised (in shares)	(40,253)
Forfeited (in shares)	0
Canceled/expired (in shares)	0
Ending balance (in shares)	963,866
Exercisable at March 31, 2017 (in shares)	846,946
Stock options outstanding - Weighted average exercise price
Beginning balance (USD per share)	$ 11
Granted (USD per share)	0
Exercised (USD per share)	11.07
Forfeited (USD per share)	0
Canceled/expired (USD per share)	0
Ending balance (USD per share)	10.99
Exercisable at March 31, 2017 (USD per share)	$ 10.67
Non-vested stock awards/performance units
Non-vested stock awards/stock units outstanding - Number of shares
Beginning balance (in shares)	932,223
Granted (in shares)	360,867
Stock awards vested (in shares)	(134,226)
Forfeited (in shares)	(1,291)
Ending balance (in shares)	1,157,573
Non-vested stock awards/stock units outstanding - Weighted average grant date fair value
Beginning balance (USD per share)	$ 14.09
Granted (USD per share)	24.28
Stock awards vested (USD per share)	13.98
Forfeited (USD per share)	13.82
Ending balance (USD per share)	$ 17.28

Stock-Based Compensation - St80

Stock-Based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,736	$ 1,540
Stock-based compensation expense, income tax benefit	564	524
Proceeds from stock option exercises	493	546
Unrecognized stock-based compensation, stock options	73
Unrecognized stock-based compensation, non-vested stock awards/performance units	15,257
Total unrecognized stock-based compensation expense	15,330
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	50	126
Non-vested stock awards/performance units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,686	$ 1,414

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	May 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares remaining that are authorized and available for future grant	3,279,763		3,639,838
Grant of share options (in shares)	0	0
Exercise price (USD per share)	$ 0
Intrinsic value of options outstanding	$ 12,247
Intrinsic value of options exercisable	$ 11,036
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of contract	10 years
Weighted-average period total unrecognized compensation cost related to non-vested shares granted	7 months 14 days
Stock options | Stock Compensation Grants associated with legacy Sterling Merger
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price (USD per share)	$ 14.25
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for awards	1 year
Stock options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for awards	5 years
Fully Vested legacy Sterling options | Sterling Bancorp (Legacy)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of share options (in shares)	104,152
Restricted Stock Units (RSUs) | Stock Compensation Grants associated with legacy Sterling Merger
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (USD per share)	$ 11.72
Non-vested stock awards/performance units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period, other than options (in shares)	360,867
Weighted average grant date fair value (USD per share)	$ 24.28
Weighted-average period total unrecognized compensation cost related to non-vested shares granted	1 year 11 months 28 days
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized				2,800,000
Number of shares granted for each share received	1
Sterling Bancorp 2013 Employment Inducement Award Plan | Sterling Bancorp (Legacy)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of share options (in shares)	95,991
Prior Plan | Restricted Stock Units (RSUs) | Sterling Bancorp (Legacy)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period, other than options (in shares)	255,973

Other Post Retirement Plans - N

Other Post Retirement Plans - Net Pension and Post-retirement Expense (Details) - Other Post retirement Benefit Plans - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0
Interest cost	100	104
Net amortization and deferral	9	12
Total other post-retirement expense	$ 109	$ 116

Other Post Retirement Plans -83

Other Post Retirement Plans - Narrative (Details) - Other Post retirement Benefit Plans - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to fund SERP	$ 82	$ 30
Other liabilities
Defined Benefit Plan Disclosure [Line Items]
Total post retirement plan liabilities	$ 12,152		$ 12,125

Other Non-interest Expense (Det

Other Non-interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Income and Expenses [Abstract]
Advertising and promotion	$ 551	$ 551
Professional fees	2,205	2,471
Data and check processing	2,469	1,754
Insurance & surety bond premium	537	785
Other	4,407	5,169
Total other non-interest expense	$ 10,169	$ 10,730

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Computation of basic and diluted earnings per share:
Net income	$ 39,067	$ 23,766
Weighted average common shares outstanding for computation of basic EPS	135,163,347	129,974,025
Common-equivalent shares due to the dilutive effect of stock options and unvested performance share grants	648,374	526,950
Weighted average common shares for computation of diluted EPS	135,811,721	130,500,975
Basic (loss) earnings per common share (USD per share)	$ 0.29	$ 0.18
Diluted (loss) earnings per common share (USD per share)	$ 0.29	$ 0.18
Weighted average common shares that could be exercised that were anti-dilutive for the period	0	0

Stockholders' Equity - Complian

Stockholders' Equity - Compliance with Regulatory Capital Requirements (Schedule) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Sterling National Bank
Common equity tier 1 to RWA:
Tier 1 common equity	$ 1,197,463	$ 1,176,497
Tier 1 common equity ratio	10.79%	10.87%
Tier 1 common equity required for minimum capital adequacy, phase-in schedule	$ 638,196	$ 554,663
Tier 1 common equity required for minimum capital adequacy ratio, phase-in schedule	5.75%	5.125%
Tier 1 common equity required for minimum capital adequacy, fully phased-in	$ 776,934	$ 757,588
Tier 1 common equity required for minimum capital adequacy ratio, phase-in schedule	7.00%	7.00%
Tier 1 common equity required to be well capitalized	$ 721,439	$ 703,475
Tier 1 common equity required to be well capitalized ratio	6.50%	6.50%
Tier 1 capital to RWA:
Tier 1 risk-based capital	$ 1,197,463	$ 1,176,497
Tier 1 risk-based capital ratio	10.79%	10.87%
Tier 1 risk-based capital required for minimum capital adequacy, phase-in schedule	$ 804,681	$ 717,003
Tier 1 risk-based capital required for minimum capital adequacy ratio, phase-in schedule	7.25%	6.625%
Tier 1 risk-based capital required for minimum capital adequacy, fully phased-in	$ 943,420	$ 919,928
Tier 1 risk-based capital required for minimum capital adequacy, fully phased-in	8.50%	8.50%
Tier 1 risk-based capital required to be well capitalized	$ 887,924	$ 865,815
Tier 1 risk-based capital required to be well capitalized ratio	8.00%	8.00%
Total capital to RWA:
Total risk-based capital	$ 1,437,500	$ 1,413,165
Total risk-based capital ratio	12.95%	13.06%
Total risk-based capital required for minimum capital adequacy, phase-in schedule	$ 1,026,662	$ 933,457
Total risk-based capital required for minimum capital adequacy ratio, phase-in schedule	9.25%	8.625%
Total risk-based capital required for minimum capital adequacy, fully phased-in	$ 1,165,401	$ 1,136,382
Total risk-based capital required for minimum capital adequacy ratio, fully phased-in	10.50%	10.50%
Total risk-based capital required to be well capitalized	$ 1,109,905	$ 1,082,269
Total risk-based capital required to be well capitalized ratio	10.00%	10.00%
Tier 1 leverage ratio:
Tier 1 (core) capital	$ 1,197,463	$ 1,176,497
Tier 1 (core) capital ratio	8.99%	9.08%
Tier 1 (core) capital required for minimum capital adequacy, phase-in schedule	$ 532,938	$ 518,308
Tier 1 (core) capital required for minimum capital adequacy ratio, phase-in schedule	4.00%	4.00%
Tier 1 (core) capital required for minimum capital adequacy, fully phased- in	$ 532,938	$ 518,308
Tier 1 (core) capital required for minimum capital adequacy ratio, fully phased-in	4.00%	4.00%
Tier 1 (core) capital required to be well capitalized	$ 666,172	$ 647,885
Tier 1 (core) capital required to be well capitalized ratio	5.00%	5.00%
Sterling Bancorp
Common equity tier 1 to RWA:
Tier 1 common equity	$ 1,184,294	$ 1,160,739
Tier 1 common equity ratio	10.67%	10.73%
Tier 1 common equity required for minimum capital adequacy, phase-in schedule	$ 637,994	$ 554,474
Tier 1 common equity required for minimum capital adequacy ratio, phase-in schedule	5.75%	5.125%
Tier 1 common equity required for minimum capital adequacy, fully phased-in	$ 776,689	$ 757,330
Tier 1 common equity required for minimum capital adequacy ratio, phase-in schedule	7.00%	7.00%
Tier 1 capital to RWA:
Tier 1 risk-based capital	$ 1,184,294	$ 1,160,739
Tier 1 risk-based capital ratio	10.67%	10.73%
Tier 1 risk-based capital required for minimum capital adequacy, phase-in schedule	$ 804,428	$ 716,759
Tier 1 risk-based capital required for minimum capital adequacy ratio, phase-in schedule	7.25%	6.625%
Tier 1 risk-based capital required for minimum capital adequacy, fully phased-in	$ 943,122	$ 919,615
Tier 1 risk-based capital required for minimum capital adequacy, fully phased-in	8.50%	8.50%
Total capital to RWA:
Total risk-based capital	$ 1,404,613	$ 1,377,547
Total risk-based capital ratio	12.66%	12.73%
Total risk-based capital required for minimum capital adequacy, phase-in schedule	$ 1,026,339	$ 933,139
Total risk-based capital required for minimum capital adequacy ratio, phase-in schedule	9.25%	8.625%
Total risk-based capital required for minimum capital adequacy, fully phased-in	$ 1,165,033	$ 1,135,995
Total risk-based capital required for minimum capital adequacy ratio, fully phased-in	10.50%	10.50%
Tier 1 leverage ratio:
Tier 1 (core) capital	$ 1,184,294	$ 1,160,739
Tier 1 (core) capital ratio	8.89%	8.95%
Tier 1 (core) capital required for minimum capital adequacy, phase-in schedule	$ 532,911	$ 518,733
Tier 1 (core) capital required for minimum capital adequacy ratio, phase-in schedule	4.00%	4.00%
Tier 1 (core) capital required for minimum capital adequacy, fully phased- in	$ 532,911	$ 518,733
Tier 1 (core) capital required for minimum capital adequacy ratio, fully phased-in	4.00%	4.00%

Stockholders' Equity - Narrativ

Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 22, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Class of Stock [Line Items]
Aggregate dividend capacity without prior regulatory approval		$ 145,016
Capital raise, shares	4,370,000
Capital raise, price per share (USD per share)	$ 20.95
Total proceeds from public offering	$ 92,863
Net proceeds from public offering	$ 90,995
Shares available for repurchase program		776,713
Sterling Bancorp
Class of Stock [Line Items]
Tier 2 capital		$ 150,944
Shares repurchased under repurchase program		0	0
Sterling National Bank
Class of Stock [Line Items]
Tier 1 (core) capital required for minimum capital adequacy, fully phased- in		$ 532,938		$ 518,308
Liquidation account		13,300
Subordinated notes | Sterling National Bank
Class of Stock [Line Items]
Tier 2 capital		$ 172,553

Commitments and Contingencies88

Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Rent expense	$ 2,250	$ 3,522
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Remainder of 2017	7,956
2,018	10,237
2,019	8,693
2,020	7,790
2,021	6,355
2,022	5,229
2023 and thereafter	16,272
Total future minimum payments	62,532
Loan origination commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Lending-related instruments	282,661		$ 245,319
Unused lines of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Lending-related instruments	999,537		968,288
Letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Lending-related instruments	$ 115,163		$ 114,582

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other securities:
Securities available for sale	$ 1,941,671	$ 1,727,417
Quoted Prices in Active markets for Identical Assets Level 1
Other securities:
Securities available for sale	0	0
Swaps	0	0
Swaps	0	0
Significant Other Observable Inputs Level 2
Other securities:
Securities available for sale	1,941,671	1,727,417
Swaps	2,462	2,088
Swaps	5,797	2,088
Significant Unobservable Inputs Level 3
Other securities:
Securities available for sale	0	0
Swaps	0	0
Swaps	0	0
Fair Value, Measurements, Recurring
Residential MBS(1):
Mortgage-backed securities-residential	1,435,152	1,250,162
Other securities:
Total investment securities available for sale	506,519	477,255
Securities available for sale	1,941,671	1,727,417
Swaps	2,462	2,088
Total assets	1,944,133	1,729,505
Swaps	(5,797)	(2,088)
Total liabilities	(5,797)	(2,088)
Fair Value, Measurements, Recurring | Agency-backed
Residential MBS(1):
Mortgage-backed securities-residential	1,381,999	1,193,481
Fair Value, Measurements, Recurring | CMO/Other MBS
Residential MBS(1):
Mortgage-backed securities-residential	53,153	56,681
Fair Value, Measurements, Recurring | Federal agencies
Other securities:
Total investment securities available for sale	189,130	193,979
Fair Value, Measurements, Recurring | Corporate bonds
Other securities:
Total investment securities available for sale	61,047	42,506
Fair Value, Measurements, Recurring | State and municipal
Other securities:
Total investment securities available for sale	256,342	240,770
Fair Value, Measurements, Recurring | Quoted Prices in Active markets for Identical Assets Level 1
Residential MBS(1):
Mortgage-backed securities-residential	0	0
Other securities:
Total investment securities available for sale	0	0
Securities available for sale	0	0
Swaps	0	0
Total assets	0	0
Swaps	0	0
Total liabilities	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active markets for Identical Assets Level 1 | Agency-backed
Residential MBS(1):
Mortgage-backed securities-residential	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active markets for Identical Assets Level 1 | CMO/Other MBS
Residential MBS(1):
Mortgage-backed securities-residential	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active markets for Identical Assets Level 1 | Federal agencies
Other securities:
Total investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active markets for Identical Assets Level 1 | Corporate bonds
Other securities:
Total investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active markets for Identical Assets Level 1 | State and municipal
Other securities:
Total investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2
Residential MBS(1):
Mortgage-backed securities-residential	1,435,152	1,250,162
Other securities:
Total investment securities available for sale	506,519	477,255
Securities available for sale	1,941,671	1,727,417
Swaps	2,462	2,088
Total assets	1,944,133	1,729,505
Swaps	(5,797)	(2,088)
Total liabilities	(5,797)	(2,088)
Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2 | Agency-backed
Residential MBS(1):
Mortgage-backed securities-residential	1,381,999	1,193,481
Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2 | CMO/Other MBS
Residential MBS(1):
Mortgage-backed securities-residential	53,153	56,681
Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2 | Federal agencies
Other securities:
Total investment securities available for sale	189,130	193,979
Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2 | Corporate bonds
Other securities:
Total investment securities available for sale	61,047	42,506
Fair Value, Measurements, Recurring | Significant Other Observable Inputs Level 2 | State and municipal
Other securities:
Total investment securities available for sale	256,342	240,770
Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3
Residential MBS(1):
Mortgage-backed securities-residential	0	0
Other securities:
Total investment securities available for sale	0	0
Securities available for sale	0	0
Swaps	0	0
Total assets	0	0
Swaps	0	0
Total liabilities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3 | Agency-backed
Residential MBS(1):
Mortgage-backed securities-residential	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3 | CMO/Other MBS
Residential MBS(1):
Mortgage-backed securities-residential	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3 | Federal agencies
Other securities:
Total investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3 | Corporate bonds
Other securities:
Total investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs Level 3 | State and municipal
Other securities:
Total investment securities available for sale	$ 0	$ 0

Fair Value Measurements - Impai

Fair Value Measurements - Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Quoted Prices in Active markets for Identical Assets Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	$ 0	$ 0
Significant Other Observable Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	0	0
Significant Unobservable Inputs Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	9,693,553	9,461,469
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	6,631	6,786
Fair Value, Measurements, Nonrecurring | C&I
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	177
Fair Value, Measurements, Nonrecurring | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	6,454	6,786
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active markets for Identical Assets Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active markets for Identical Assets Level 1 | C&I
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	0
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active markets for Identical Assets Level 1 | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs Level 2 | C&I
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs Level 2 | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	0	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	6,631	6,786
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs Level 3 | C&I
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	177
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs Level 3 | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, impaired, net	$ 6,454	$ 6,786

Fair Value Measurements - Finan

Fair Value Measurements - Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	$ 1,941,671	$ 1,727,417
Securities held to maturity	1,447,317	1,357,997
Senior Notes	(76,551)	(76,469)
Subordinated Notes	(172,553)	(172,501)
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	253,703	293,646
Securities available for sale	1,941,671	1,727,417
Securities held to maturity	1,474,724	1,391,421
Loans held for sale	2,559	41,889
Portfolio loans, net	9,697,028	9,463,608
Accrued interest receivable on securities	20,816	16,495
Accrued interest receivable on loans	28,158	26,824
FHLB stock and FRB stock	148,030	135,098
Swaps	2,462	2,088
Non-maturity deposits	(9,705,163)	(9,484,505)
Certificates of deposit	(546,562)	(583,754)
FHLB borrowings	(2,035,000)	(1,791,000)
Other borrowings	(44,472)	(16,642)
Senior Notes	(76,551)	(76,469)
Subordinated Notes	(172,553)	(172,501)
Mortgage escrow funds	(13,153)	(13,572)
Accrued interest payable on deposits	(598)	(663)
Accrued interest payable on borrowings	(7,527)	(3,621)
Swaps	(5,797)	(2,088)
Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	253,703	293,646
Securities available for sale	0	0
Securities held to maturity	0	0
Loans held for sale	0	0
Portfolio loans, net	0	0
Accrued interest receivable on securities	0	0
Accrued interest receivable on loans	0	0
FHLB stock and FRB stock	0	0
Swaps	0	0
Non-maturity deposits	(9,705,163)	(9,484,505)
Certificates of deposit	0	0
FHLB borrowings	0	0
Other borrowings	0	0
Senior Notes	0	0
Subordinated Notes	0	0
Mortgage escrow funds	0	0
Accrued interest payable on deposits	0	0
Accrued interest payable on borrowings	0	0
Swaps	0	0
Significant Other Observable Inputs Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	1,941,671	1,727,417
Securities held to maturity	1,447,317	1,357,997
Loans held for sale	2,559	41,889
Portfolio loans, net	0	0
Accrued interest receivable on securities	20,816	16,495
Accrued interest receivable on loans	0	0
FHLB stock and FRB stock	0	0
Swaps	2,462	2,088
Non-maturity deposits	0	0
Certificates of deposit	(544,843)	(582,811)
FHLB borrowings	(2,031,918)	(1,788,676)
Other borrowings	(44,472)	(16,642)
Senior Notes	(80,244)	(79,283)
Subordinated Notes	(175,113)	(169,813)
Mortgage escrow funds	(13,153)	(13,572)
Accrued interest payable on deposits	(598)	(663)
Accrued interest payable on borrowings	(7,527)	(3,621)
Swaps	(5,797)	(2,088)
Significant Unobservable Inputs Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	0	0
Securities held to maturity	0	0
Loans held for sale	0	0
Portfolio loans, net	9,693,553	9,461,469
Accrued interest receivable on securities	0	0
Accrued interest receivable on loans	28,158	26,824
FHLB stock and FRB stock	0	0
Swaps	0	0
Non-maturity deposits	0	0
Certificates of deposit	0	0
FHLB borrowings	0	0
Other borrowings	0	0
Senior Notes	0	0
Subordinated Notes	0	0
Mortgage escrow funds	0	0
Accrued interest payable on deposits	0	0
Accrued interest payable on borrowings	0	0
Swaps	0	0
Residential MBS:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	1,435,152	1,250,162
Securities held to maturity	326,824	315,363
Securities Investment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	506,519	477,255
Securities held to maturity	1,120,493	1,042,634
Other | Securities Investment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Securities held to maturity	5,949	5,945
State and municipal | Securities Investment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	256,342	240,770
Securities held to maturity	1,018,928	941,629
Federal agencies | Securities Investment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	189,130	193,979
Securities held to maturity	59,960	59,592
Agency-backed | Residential MBS:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	1,381,999	1,193,481
Securities held to maturity	288,929	275,267
Corporate bonds | Securities Investment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	61,047	42,506
Securities held to maturity	35,656	35,468
Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	1,941,671	1,727,417
Investments, Fair Value Disclosure	506,519	477,255
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	1,435,152	1,250,162
Portfolio loans, net	54,707	55,391
Swaps	2,462	2,088
Assets, Fair Value Disclosure	1,944,133	1,729,505
Swaps	5,797	2,088
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(5,797)	(2,088)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investments, Fair Value Disclosure	0	0
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	0	0
Swaps	0	0
Assets, Fair Value Disclosure	0	0
Swaps	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	1,941,671	1,727,417
Investments, Fair Value Disclosure	506,519	477,255
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	1,435,152	1,250,162
Swaps	2,462	2,088
Assets, Fair Value Disclosure	1,944,133	1,729,505
Swaps	5,797	2,088
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(5,797)	(2,088)
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	0	0
Investments, Fair Value Disclosure	0	0
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	0	0
Swaps	0	0
Assets, Fair Value Disclosure	0	0
Swaps	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | State and municipal
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	256,342	240,770
Fair Value, Measurements, Recurring [Member] | State and municipal | Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | State and municipal | Significant Other Observable Inputs Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	256,342	240,770
Fair Value, Measurements, Recurring [Member] | State and municipal | Significant Unobservable Inputs Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	53,153	56,681
Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Significant Other Observable Inputs Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	53,153	56,681
Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Significant Unobservable Inputs Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Agency-backed
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	1,381,999	1,193,481
Fair Value, Measurements, Recurring [Member] | Agency-backed | Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Agency-backed | Significant Other Observable Inputs Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	1,381,999	1,193,481
Fair Value, Measurements, Recurring [Member] | Agency-backed | Significant Unobservable Inputs Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | US Government Corporations and Agencies Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	189,130	193,979
Fair Value, Measurements, Recurring [Member] | US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | US Government Corporations and Agencies Securities [Member] | Significant Other Observable Inputs Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	189,130	193,979
Fair Value, Measurements, Recurring [Member] | US Government Corporations and Agencies Securities [Member] | Significant Unobservable Inputs Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Corporate bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	61,047	42,506
Fair Value, Measurements, Recurring [Member] | Corporate bonds | Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Corporate bonds | Significant Other Observable Inputs Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	61,047	42,506
Fair Value, Measurements, Recurring [Member] | Corporate bonds | Significant Unobservable Inputs Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	$ 0	$ 0

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum loan balance for credit risk to be evaluated on a homogeneous basis	$ 500,000
Changes in fair value recognized on provisions on loans held by the Company	0	$ 0
Mortgage servicing rights	$ 1,009,000		$ 1,024,000
Percentage appraisals discounted	22.00%		22.00%
Assets taken in foreclosure, defaulted loans and facilities held for sale	$ 9,632,000		$ 13,619,000
Changes in fair value recognized through income for foreclosed assets held by the Company	$ 1,293,000	$ 165,000
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Prepayment speed	1.00%		1.00%
Market discount rate	8.75%		8.50%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Prepayment speed	4.25%		5.55%
Market discount rate	11.75%		11.50%
Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Prepayment speed	1.67%		1.74%
Market discount rate	10.00%		9.73%
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Portfolio loans, net	$ 54,707,000		$ 55,391,000
Commercial loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum loan balance for credit risk to be evaluated on a homogeneous basis	250,000
Residential loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum loan balance for credit risk to be evaluated on a homogeneous basis	$ 500,000

Accumulated Other Comprehensi93

Accumulated Other Comprehensive Income (Loss) - Components of AOCI (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Net unrealized holding loss on available for sale securities	$ (32,899)	$ (37,417)
Related income tax benefit	12,995	14,780
Available for sale securities AOCI, net of tax	(19,904)	(22,637)
Net unrealized holding loss on securities transferred to held to maturity	(5,152)	(5,395)
Related income tax benefit	2,035	2,131
Securities transferred to held to maturity AOCI, net of tax	(3,117)	(3,264)
Net unrealized holding loss on retirement plans	(1,157)	(1,213)
Related income tax benefit	457	479
Retirement plans AOCI, net of tax	(700)	(734)
AOCI	$ (23,721)	$ (26,635)

Accumulated Other Comprehensi94

Accumulated Other Comprehensive Income (Loss) - Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	$ 1,855,183	$ 1,665,073
Other comprehensive gain (loss) before reclassification	2,747	16,285
Amounts reclassified from AOCI	167	(2)
Total other comprehensive income	2,914	16,283
Balance	1,888,613	1,698,133
Net unrealized holding (loss) gain on available for sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(22,637)	(6,999)
Other comprehensive gain (loss) before reclassification	2,747	16,285
Amounts reclassified from AOCI	(14)	(171)
Total other comprehensive income	2,733	16,114
Balance	(19,904)	9,115
Net unrealized holding (loss)gain on securities transferred to held to maturity
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(3,264)	(4,155)
Other comprehensive gain (loss) before reclassification	0	0
Amounts reclassified from AOCI	147	(45)
Total other comprehensive income	147	(45)
Balance	(3,117)	(4,200)
Net unrealized holding (loss) gain on retirement plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(734)	(970)
Other comprehensive gain (loss) before reclassification	0	0
Amounts reclassified from AOCI	34	214
Total other comprehensive income	34	214
Balance	(700)	(756)
Accumulated other comprehensive (loss) income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(26,635)	(12,124)
Balance	$ (23,721)	$ 4,159

Pending Merger with Astoria F95

Pending Merger with Astoria Financial Corporation - Narrative (Details) - USD ($) $ in Thousands	Mar. 07, 2017	Mar. 31, 2017	Mar. 31, 2016	Apr. 28, 2017
Business Acquisition [Line Items]
Merger agreement, value of stock-for-stock transaction		$ 0	$ 351,452
Astoria Financial Corporation
Business Acquisition [Line Items]
Merger agreement, value of stock-for-stock transaction	$ 2,233,873
Number of shares received by Astoria shareholders for each share of Sterling common stock	0.875
Subsequent event | Astoria Financial Corporation
Business Acquisition [Line Items]
Upon closing, percentage of stock owned by Sterling shareholders				60.00%
Upon closing, percentage of stock owned by Astoria shareholders				40.00%

Pending Merger with Astoria F96

Pending Merger with Astoria Financial Corporation - Pro Forma Information (Details) - Astoria Financial Corporation $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Pro Forma Condensed Income Statement Information:
Net interest income	$ 818,907
Provision for loan losses	10,849
Income before income taxes	385,185
Net income	251,173
Pro Forma Condensed Combined Balance Sheet Information:
Portfolio loans, net	19,530,795
Total assets	29,510,290
Deposits	18,956,004
Total stockholders’ equity	$ 4,218,852