Table of Contents

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 
 
 
FORM 10-Q
 
(Mark One)
   
ý Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
  
For the quarterly period ended June 30, 2017March 31, 2018
or
   
o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
  For the transition period from__________ to __________
Commission file number: 001-32550  
 
 
WESTERN ALLIANCE BANCORPORATION
(Exact name of registrant as specified in its charter)
 
 
 
Delaware 88-0365922
(State or other jurisdiction of
incorporation or organization)
 
(I.R.S. Employer
Identification No.)
 
One E. Washington Street Suite 1400, Phoenix, AZ 85004
(Address of principal executive offices) (Zip Code)
(602) 389-3500
(Registrant’s telephone number, including area code)
 
 

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ý    No  ¨
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ý    No  ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer ý Accelerated filer ¨
       
Non-accelerated filer ¨ Smaller reporting company ¨
       
    Emerging growth company ¨
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨ 
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  ý
As of July 21, 2017,April 23, 2018, Western Alliance Bancorporation had 105,536,405105,860,364 shares of common stock outstanding.

INDEX
 
  Page
 
  
  
Item 1. 
 
 
 
 
 
 
Item 2.
Item 3.
Item 4.
   
 
   
Item 1.
Item 1A.
Item 5.
Item 6.
   
  



PART I
GLOSSARY OF ENTITIES AND TERMS

The acronyms and abbreviations identified below are used in various sections of this Form 10-Q, including "Management's Discussion and Analysis of Financial Condition and Results of Operations," in Item 2 and the Consolidated Financial Statements and the Notes to Unaudited Consolidated Financial Statements in Item I of this Form 10-Q.
ENTITIES / DIVISIONS:
AABAlliance Association BankHFFHotel Franchise Finance
ABAAlliance Bank of ArizonaLVSPLas Vegas Sunset Properties
BONBank of NevadaTPBTorrey Pines Bank
BridgeBridge BankWA PWI, LLCWestern Alliance Public Welfare Investments, LLC
CompanyWestern Alliance Bancorporation and subsidiariesWAB or BankWestern Alliance Bank
FIBFirst Independent BankWABTWestern Alliance Business Trust
HOA ServicesHomeowner Associations ServicesWAL or ParentWestern Alliance Bancorporation
TERMS:
AFSAvailable-for-SaleHFSHFIHeld for SaleInvestment
ALCOAsset and Liability Management CommitteeHTMHeld-to-Maturity
AOCIAccumulated Other Comprehensive IncomeICSInsured Cash Sweep Service
ASCAccounting Standards CodificationIRCInternal Revenue Code
ASUAccounting Standards UpdateISDAInternational Swaps and Derivatives Association
BODATMBoard of DirectorsAt-the-MarketLIBORLondon Interbank Offered Rate
Basel CommitteeBasel Committee on Banking SupervisionLIHTCLow-Income Housing Tax Credit
Basel IIIBanking Supervision's December 2010 final capital frameworkMBSMortgage-Backed Securities
BODBoard of DirectorsNBLNational Business Lines
CDARSCertificate Deposit Account Registry ServiceLIHTCNOLLow-Income Housing Tax CreditNet Operating Loss
CDOCollateralized Debt ObligationMBSNPVMortgage-Backed SecuritiesNet Present Value
CEOChief Executive OfficerNBLOCCNational Business LinesOffice of the Comptroller of the Currency
CFOChief Financial OfficerNOLOCINet Operating LossOther Comprehensive Income
CRACommunity Reinvestment ActNPVOREONet Present ValueOther Real Estate Owned
CRECommercial Real EstateNUBILsOTTINet Unrealized Built In LossesOther-than-Temporary Impairment
EPSEarnings per shareOCIPCIOther Comprehensive IncomePurchased Credit Impaired
EVEEconomic Value of EquityOREOSBAOther Real Estate OwnedSmall Business Administration
Exchange ActSecurities Exchange Act of 1934, as amendedOTTISBICOther-than-Temporary ImpairmentSmall Business Investment Company
FASBFinancial Accounting Standards BoardPCISECPurchased Credit ImpairedSecurities and Exchange Commission
FDICFederal Deposit Insurance CorporationSBASERPSmall Business AdministrationSupplemental Executive Retirement Plan
FHLBFederal Home Loan BankSBICTCJASmall Business Investment CompanyTax Cuts and Jobs Act
FRBFederal Reserve BankSECTDRSecurities and Exchange CommissionTroubled Debt Restructuring
FVOFair Value OptionSERPTEBSupplemental Executive Retirement PlanTax Equivalent Basis
GAAPU.S. Generally Accepted Accounting PrinciplesTDRXBRLTroubled Debt RestructuringeXtensible Business Reporting Language
GSEGovernment-Sponsored EnterpriseTEBTax Equivalent Basis
HFIHeld for InvestmentXBRLeXtensible Business Reporting Language

Item 1.Financial Statements
WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (Unaudited)   (Unaudited)  
 (in thousands,
except shares and per share amounts)
 (in thousands,
except shares and per share amounts)
Assets:        
Cash and due from banks $149,569
 $168,066
 $149,737
 $181,191
Interest-bearing deposits in other financial institutions 457,106
 116,425
 289,634
 235,577
Cash and cash equivalents 606,675
 284,491
Cash, cash equivalents, and restricted cash 439,371
 416,768
Money market investments 147
 
 5
 
Investment securities - measured at fair value; amortized cost of $0 at June 30, 2017 and $1,055 at December 31, 2016 
 1,053
Investment securities - AFS, at fair value; amortized cost of $3,085,124 at June 30, 2017 and $2,633,298 at December 31, 2016 3,084,658
 2,609,380
Investment securities - HTM, at amortized cost; fair value of $137,526 at June 30, 2017 and $91,966 at December 31, 2016 132,802
 92,079
Investment securities - AFS, at fair value; amortized cost of $3,474,049 at March 31, 2018 and $3,515,401 at December 31, 2017 3,405,462
 3,499,519
Investment securities - HTM, at amortized cost; fair value of $255,418 at March 31, 2018 and $256,314 at December 31, 2017 262,304
 255,050
Investments in restricted stock, at cost 65,357
 65,249
 66,519
 65,785
Loans - HFS 16,736
 18,909
Loans - HFI, net 13,973,259
 13,189,527
Loans - HFI, net of deferred loan fees and costs 15,560,453
 15,093,935
Less: allowance for credit losses (131,811) (124,704) (144,659) (140,050)
Net loans held for investment 13,841,448
 13,064,823
 15,415,794
 14,953,885
Premises and equipment, net 120,467
 119,833
 116,702
 118,719
Other assets acquired through foreclosure, net 30,988
 47,815
 30,194
 28,540
Bank owned life insurance 166,430
 164,510
 168,619
 167,764
Goodwill 289,895
 289,967
 289,895
 289,895
Other intangible assets, net 11,750
 12,927
 10,455
 10,853
Deferred tax assets, net 87,658
 95,194
 27,374
 5,780
Investments in LIHTC 288,911
 267,023
Other assets 389,734
 334,612
 239,126
 249,504
Total assets $18,844,745
 $17,200,842
 $20,760,731
 $20,329,085
Liabilities:        
Deposits:        
Non-interest-bearing demand $6,859,358
 $5,632,926
��$7,502,036
 $7,433,962
Interest-bearing 9,171,755
 8,916,937
 9,852,502
 9,538,570
Total deposits 16,031,113
 14,549,863
 17,354,538
 16,972,532
Customer repurchase agreements 32,661
 41,728
 21,676
 26,017
Other borrowings 
 80,000
 300,000
 390,000
Qualifying debt, net 375,444
 367,937
Qualifying debt 363,935
 376,905
Other liabilities 346,853
 269,785
 426,819
 333,933
Total liabilities 16,786,071
 15,309,313
 18,466,968
 18,099,387
Commitments and contingencies (Note 12) 
 
 
 
Stockholders’ equity:        
Common stock - par value $0.0001; 200,000,000 authorized; 106,931,341 shares issued at June 30, 2017 and 106,371,093 at December 31, 2016 10
 10
Treasury stock, at cost (1,502,498 shares at June 30, 2017 and 1,300,232 shares at December 31, 2016) (36,651) (26,362)
Common stock - par value $0.0001; 200,000,000 authorized; 107,611,765 shares issued at March 31, 2018 and 107,057,520 at December 31, 2017 10
 10
Treasury stock, at cost (1,751,022 shares at March 31, 2018 and 1,570,155 shares at December 31, 2017) (46,469) (40,173)
Additional paid in capital 1,413,061
 1,400,140
 1,431,460
 1,424,540
Accumulated other comprehensive income (loss) 6,490
 (4,695)
Accumulated other comprehensive (loss) (41,662) (3,145)
Retained earnings 675,764
 522,436
 950,424
 848,466
Total stockholders’ equity 2,058,674
 1,891,529
 2,293,763
 2,229,698
Total liabilities and stockholders’ equity $18,844,745
 $17,200,842
 $20,760,731
 $20,329,085
See accompanying Notes to Unaudited Consolidated Financial Statements.

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES
CONSOLIDATED INCOME STATEMENTS
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 2017 2016 2018 2017
 (in thousands, except per share amounts) (in thousands, except per share amounts)
Interest income:            
Loans, including fees $183,657
 $160,015
 $356,210
 $299,801
 $205,959
 $172,553
Investment securities 19,286
 11,456
 35,858
 23,482
 25,772
 16,571
Dividends 1,921
 1,994
 4,149
 4,007
 1,478
 2,229
Other 2,089
 624
 3,001
 1,055
 1,488
 912
Total interest income 206,953
 174,089
 399,218
 328,345
 234,697
 192,265
Interest expense:         
 
Deposits 9,645
 7,678
 18,057
 13,921
 14,173
 8,412
Other borrowings 1,326
 190
Qualifying debt 4,493
 2,514
 8,831
 4,698
 4,969
 4,338
Other borrowings 59
 197
 249
 298
Other 13
 14
 29
 31
 9
 16
Total interest expense 14,210
 10,403
 27,166
 18,948
 20,477
 12,956
Net interest income 192,743
 163,686
 372,052
 309,397
 214,220
 179,309
Provision for credit losses 3,000
 2,500
 7,250
 5,000
 6,000
 4,250
Net interest income after provision for credit losses 189,743
 161,186
 364,802
 304,397
 208,220
 175,059
Non-interest income:         
 
Service charges and fees 5,203
 4,544
 9,941
 9,043
 5,745
 4,738
Card income 1,380
 1,274
 2,802
 2,464
 1,972
 1,492
Income from equity investments 1,291
 59
 1,983
 401
 1,460
 692
Income from bank owned life insurance 973
 1,029
 1,921
 1,959
Foreign currency income 832
 842
 1,874
 1,783
 1,202
 1,042
Lending related income and gains (losses) on sale of loans, net 227
 194
 649
 3,801
 978
 422
(Loss) gain on sales of investment securities, net (47) 
 588
 1,001
Income from bank owned life insurance 928
 948
Gain (loss) on sales of investment securities, net 
 635
Unrealized (losses) gains on assets measured at fair value, net (1,074) (1)
Other income 590
 617
 1,235
 1,240
 432
 631
Total non-interest income 10,449
 8,559
 20,993
 21,692
 11,643
 10,599
Non-interest expense:         
 
Salaries and employee benefits 52,246
 44,711
 103,866
 89,566
 62,133
 51,620
Occupancy 6,864
 6,894
Legal, professional, and directors' fees 8,483
 5,747
 17,286
 11,319
 6,003
 8,803
Occupancy 6,927
 7,246
 13,821
 13,503
Data processing 4,396
 5,114
 9,667
 9,175
 5,207
 5,264
Insurance 3,589
 2,963
 6,817
 6,286
 3,869
 3,228
Deposit costs 2,133
 986
 3,874
 1,758
 2,926
 1,741
Business development 1,728
 2,063
Card expense 942
 731
Marketing 1,131
 1,097
 1,852
 1,754
 596
 721
Loan and repossessed asset expenses 1,098
 832
 2,376
 1,734
 583
 1,278
Card expense 704
 824
 1,358
 1,711
Intangible amortization 488
 697
 1,177
 1,394
 398
 689
Net loss (gain) on sales / valuations of repossessed and other assets 231
 357
 (312) 55
Acquisition / restructure expense 
 3,662
 
 3,662
Net (gain) loss on sales / valuations of repossessed and other assets (1,228) (543)
Other expense 6,831
 7,568
 14,232
 15,380
 8,128
 5,338
Total non-interest expense 88,257
 81,804
 176,014
 157,297
 98,149
 87,827
Income before provision for income taxes 111,935
 87,941
 209,781
 168,792
 121,714
 97,831
Income tax expense 31,964
 26,327
 56,453
 45,846
 20,814
 24,489
Net income $79,971
 $61,614
 $153,328
 $122,946
 $100,900
 $73,342
            
Earnings per share        
Earnings per share available to common stockholders:    
Basic $0.77
 $0.60
 $1.47
 $1.20
 $0.97
 $0.71
Diluted 0.76
 0.60
 1.46
 1.19
 0.96
 0.70
Weighted average number of shares outstanding:        
Weighted average number of common shares outstanding:    
Basic 104,162
 102,688
 104,075
 102,294
 104,530
 103,987
Diluted 105,045
 103,472
 104,941
 103,007
 105,324
 104,836
See accompanying Notes to Unaudited Consolidated Financial Statements.

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
  Three Months Ended June 30, Six Months Ended June 30,
  2017 2016 2017 2016
  (in thousands)
Net income $79,971
 $61,614
 $153,328
 $122,946
Other comprehensive income, net:        
Unrealized gain (loss) on AFS securities, net of tax effect of $(3,534), $(8,008), $(9,204), and $(12,508), respectively 5,662
 12,712
 14,831
 23,731
Unrealized gain (loss) on SERP, net of tax effect of $(23), $(4), $(23), and $(6)
 37
 6
 36
 12
Unrealized (loss) gain on junior subordinated debt, net of tax effect of $1,287, $(431), $2,044, and $(884) (2,089) 575
 (3,318) 1,334
Realized loss (gain) on sale of AFS securities included in income, net of tax effect of $(18), $0, $224, and $290, respectively 29
 
 (364) (711)
Net other comprehensive income 3,639
 13,293
 11,185
 24,366
Comprehensive income $83,610
 $74,907
 $164,513
 $147,312
  Three Months Ended March 31,
  2018 2017
  (in thousands)
Net income $100,900
 $73,342
Other comprehensive (loss) income, net:    
Unrealized (loss) gain on AFS securities, net of tax effect of $12,714 and $(5,670), respectively (38,914) 9,169
Unrealized (loss) gain on SERP, net of tax effect of $2 and $1, respectively (11) (1)
Unrealized gain (loss) on junior subordinated debt, net of tax effect of $(478) and $757, respectively 1,466
 (1,229)
Realized (gain) loss on sale of AFS securities included in income, net of tax effect of $0 and $242, respectively 
 (393)
Net other comprehensive (loss) income (37,459) 7,546
Comprehensive income $63,441
 $80,888
See accompanying Notes to Unaudited Consolidated Financial Statements.

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY
 Common Stock Additional Paid in Capital Treasury Stock Accumulated Other Comprehensive Income (Loss) Retained Earnings Total Stockholders’ Equity
 Shares Amount     
 (in thousands)
Balance, December 31, 2015103,087
 $10
 $1,323,473
 $(16,879) $22,260
 $262,638
 $1,591,502
Net income
 
 
 
 
 122,946
 122,946
Exercise of stock options53
 
 519
 
 
 
 519
Restricted stock, performance stock units, and other grants687
 
 10,137
 
 
 
 10,137
Restricted stock surrendered (1)(293) 
 
 (9,045) 
 
 (9,045)
Issuance of common stock under ATM offering, net of offering costs1,550
 
 55,785
 
 
   55,785
Other comprehensive income, net
 
 
 
 24,366
 
 24,366
Balance, June 30, 2016105,084
 $10
 $1,389,914
 $(25,924) $46,626
 $385,584
 $1,796,210
              
Balance, December 31, 2016105,071
 $10
 $1,400,140
 $(26,362) $(4,695) $522,436
 $1,891,529
Net income
 
 
 
 
 153,328
 153,328
Exercise of stock options23
 
 527
 
 
 
 527
Restricted stock, performance stock unit, and other grants537
 
 12,394
 
 
 
 12,394
Restricted stock surrendered (1)(202) 
 
 (10,289) 
 
 (10,289)
Other comprehensive income, net
 
 
 
 11,185
 
 11,185
Balance, June 30, 2017105,429
 $10
 $1,413,061
 $(36,651) $6,490
 $675,764
 $2,058,674
 Common Stock Additional Paid in Capital Treasury Stock Accumulated Other Comprehensive (Loss) Income Retained Earnings Total Stockholders’ Equity
 Shares Amount     
 (in thousands)
Balance, December 31, 2016105,071
 $10
 $1,400,140
 $(26,362) $(4,695) $522,436
 $1,891,529
Balance, January 1, 2017 (1)105,071
 10
 1,400,140
 (26,362) (4,695) 522,974
 1,892,067
Net income
 
 
 
 
 73,342
 73,342
Exercise of stock options9
 
 184
 
 
 
 184
Restricted stock, performance stock units, and other grants, net549
 

 6,619
 
 
 
 6,619
Restricted stock surrendered (2)(201) 
 
 (10,243) 
 
 (10,243)
Other comprehensive income, net
 
 
 
 7,546
 
 7,546
Balance, March 31, 2017105,428
 $10
 $1,406,943
 $(36,605) $2,851
 $596,316
 $1,969,515
              
Balance, December 31, 2017105,487
 $10
 $1,424,540
 $(40,173) $(3,145) $848,466
 $2,229,698
Balance, January 1, 2018 (3)105,487
 10
 1,424,540
 (40,173) (4,203) 849,524
 2,229,698
Net income
 
 
 
 
 100,900
 100,900
Exercise of stock options9
 
 215
 
 
 
 215
Restricted stock, performance stock unit, and other grants, net546
 
 6,705
 
 
 
 6,705
Restricted stock surrendered (2)(181) 
 
 (6,296) 
 
 (6,296)
Other comprehensive loss, net
 
 
 
 (37,459) 
 (37,459)
Balance, March 31, 2018105,861
 $10
 $1,431,460
 $(46,469) $(41,662) $950,424
 $2,293,763
(1)As adjusted for adoption of ASU 2017-12. The cumulative effect of adoption of this guidance at January 1, 2017 resulted in an increase to retained earnings of $0.5 million and a corresponding increase to loans for the fair market value adjustment on the swaps.
(2)Share amounts represent Treasury Shares, see Note"Note 1. Summary of Significant Accounting PoliciesPolicies" for further discussion.
(3)As adjusted for adoption of ASU 2016-01 and ASU 2018-02, see "Note 1. Summary of Significant Accounting Policies" for further discussion.
See accompanying Notes to Unaudited Consolidated Financial Statements.

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
 Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 2018 2017
 (in thousands) (in thousands)
Cash flows from operating activities:        
Net income $153,328
 $122,946
 $100,900
 $73,342
Adjustments to reconcile net income to cash provided by operating activities:        
Provision for credit losses 7,250
 5,000
 6,000
 4,250
Depreciation and amortization 6,389
 6,136
 3,407
 3,211
Stock-based compensation 12,394
 10,137
 6,705
 6,342
Excess tax benefit of stock-based compensation (5,145) (3,899) (3,971) (4,593)
Deferred income taxes 517
 5,173
 (9,372) 2,401
Amortization of net premiums for investment securities 10,426
 6,229
 3,920
 4,007
Amortization of tax credit investments 8,128
 5,931
Accretion of fair market value adjustments on loans acquired from business combinations (13,584) (13,485) (5,738) (6,393)
Accretion and amortization of fair market value adjustments on other assets and liabilities acquired from business combinations 1,332
 1,549
 475
 767
Income from bank owned life insurance (1,921) (1,959) (928) (948)
(Gains) / Losses on:        
Sales of investment securities (588) (1,001) 
 (635)
Assets measured at fair value, net 1,074
 (1)
Sale of loans 107
 (2,213) (678) 52
Other assets acquired through foreclosure, net 172
 329
 (1,242) 106
Valuation adjustments of other repossessed assets, net (224) (311) 47
 (380)
Sale of premises, equipment, and other assets, net (260) 37
 (33) 47
Changes in, net of acquisitions:        
Other assets 9,704
 (2,892) 9,744
 4,864
Other liabilities (4,459) (16,639) (30,122) (4,398)
Net cash provided by operating activities 175,438
 115,137
 $88,316
 $87,972
Cash flows from investing activities:        
Investment securities - measured at fair value        
Principal pay downs and maturities 
 150
 $
 $33
Proceeds from sales 995
 
Investment securities - AFS        
Purchases (759,768) (361,195) (67,949) (185,199)
Principal pay downs and maturities 222,706
 176,410
 105,242
 90,585
Proceeds from sales 75,332
 34,304
 
 15,170
Investment securities - HTM        
Purchases (40,765) (37,030) (7,800) (10,533)
Principal pay downs and maturities 
 25
 243
 
Purchase of investment tax credits (10,756) (17,773) (13,376) (3,516)
Purchase of SBIC investments (263) 
(Purchase) sale of money market investments, net (147) 12
 (5) (90)
Proceeds from bank owned life insurance 72
 
(Purchase) liquidation of restricted stock (107) (571) (734) (154)
Loan fundings and principal collections, net (736,342) (401,692) (367,437) (342,069)
Purchase of premises, equipment, and other assets, net (5,093) (6,592) (576) (2,575)
Proceeds from sale of other real estate owned and repossessed assets, net 18,271
 4,808
 5,285
 2,889
Cash and cash equivalents (used) acquired in acquisitions, net 
 (1,272,187)
Net cash used in investing activities (1,235,674) (1,881,331) $(347,298) $(435,459)
        

  Six Months Ended June 30,
  2017 2016
  (in thousands)
Cash flows from financing activities:    
Net increase (decrease) in deposits $1,481,249
 $2,170,733
Proceeds from issuance of subordinated debt 
 169,470
Net (decrease) increase in borrowings (89,067) (149,665)
Proceeds from exercise of common stock options 527
 519
Purchases of treasury stock (10,289) (9,045)
Proceeds from issuance of stock in offerings, net 
 55,785
Net cash provided by financing activities 1,382,420
 2,237,797
Net increase (decrease) in cash and cash equivalents 322,184
 471,603
Cash and cash equivalents at beginning of period 284,491
 224,640
Cash and cash equivalents at end of period $606,675
 $696,243
Supplemental disclosure:    
Cash paid (returned) during the period for:    
Interest $26,375
 $18,206
Income taxes 53,937
 27,176
Non-cash investing and financing activities:    
Transfers to other assets acquired through foreclosure, net 1,392
 10,726
Change in unfunded LIHTC and SBIC commitments 67,718
 27,000
Non-cash assets acquired in acquisition 
 1,284,557
Non-cash liabilities acquired in acquisition 
 12,559
Change in unrealized gain (loss) on AFS securities, net of tax 14,467
 23,019
Change in unrealized (loss) gain on junior subordinated debt, net of tax (3,318) 1,334
Change in unfunded obligations (32,742) (12,966)
  Three Months Ended March 31,
  2018 2017
  (in thousands)
Cash flows from financing activities:    
Net increase (decrease) in deposits $382,006
 $806,106
Net increase (decrease) in borrowings (94,340) (86,017)
Proceeds from exercise of common stock options 215
 184
Cash paid for tax withholding on vested restricted stock (6,296) (10,243)
Net cash provided by financing activities $281,585
 $710,030
Net increase (decrease) in cash, cash equivalents, and restricted cash 22,603
 362,543
Cash, cash equivalents, and restricted cash at beginning of period 416,768
 284,491
Cash, cash equivalents, and restricted cash at end of period $439,371
 $647,034
Supplemental disclosure:    
Cash paid during the period for:    
Interest $25,303
 $17,851
Income taxes 9,881
 (23)
Non-cash investing and financing activity:    
Transfers to other assets acquired through foreclosure, net 5,744
 
Unfunded commitments originated 30,000
 30,869
Change in unrealized (loss) gain on AFS securities, net of tax (38,914) 9,169
Change in unrealized gain (loss) on junior subordinated debt, net of tax 1,466
 (1,229)
Change in unfunded obligations 120,512
 114,727
See accompanying Notes to Unaudited Consolidated Financial Statements.

WESTERN ALLIANCE BANCORPORATION AND SUBSIDIARIES
NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Nature of operation
WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WAL provides a full spectrum of deposit, lending, treasury management, international banking, and online banking products and services through its wholly-owned banking subsidiary, WAB.
WAB operates the following full-service banking divisions: ABA, BON, FIB, Bridge, and TPB. The Company also serves business customers through a national platform of specialized financial services including AAB, Corporate Finance, Equity Fund Resources, HFF, Life Sciences Group, Mortgage Warehouse Lending, Public and Nonprofit Finance, Renewable Resource Group, Resort Finance, and Technology Finance. In addition, the Company has onetwo non-bank subsidiary,subsidiaries, LVSP, which holds and manages certain non-performing loans and OREO.OREO and a captive insurance company formed and licensed under the laws of the State of Arizona, CS Insurance Company. CS Insurance Company was established as part of the Company's overall enterprise risk management strategy.
Basis of presentation
The accounting and reporting policies of the Company are in accordance with GAAP and conform to practices within the financial services industry. The accounts of the Company and its consolidated subsidiaries are included in the Consolidated Financial Statements.
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 and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management's estimates and judgments are ongoing and are based on experience, current and expected future conditions, third-party evaluations and various other assumptions that management believes are reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities, as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from those estimates and assumptions used in the Consolidated Financial Statements and related notes. Material estimates that are particularly susceptible to significant changes in the near term relate to the determination of the allowance for credit losses; estimated cash flows related to PCI loans; fair value determinations related to acquisitions and certain assets and liabilities carried at fair value; and accounting for income taxes.
Principles of consolidation
As of June 30, 2017,March 31, 2018, WAL has tenthe following significant wholly-owned subsidiaries: WAB, LVSP, and eight unconsolidated subsidiaries used as business trusts in connection with the issuance of trust-preferred securities.
The Bank has the following significant wholly-owned subsidiaries: WABT, which holds certain investment securities, municipal and nonprofit loans, and leases; WA PWI, LLC, which holds certain limited partnerships invested primarily in low income housing tax credits and small business investment corporations; and BW Real Estate, Inc., which operates as a real estate investment trust and holds certain of WAB's real estate loans and related securities.
The Company does not have any other significant entities that should be considered for consolidation. All significant intercompany balances and transactions have been eliminated in consolidation.
Reclassifications
Certain amounts reported in prior periods may have been reclassified in the Consolidated Financial Statements as of December 31, 2016 and for the three and six months ended June 30, 2016 may have been reclassified to conform to the current presentation. The reclassifications have no effect on net income or stockholders’ equity as previously reported.

Interim financial information
The accompanying Unaudited Consolidated Financial Statements as of and for the three and six months ended June 30,March 31, 2018 and 2017 and 2016 have been prepared in condensed format and, therefore, do not include all of the information and footnotes required by GAAP for complete financial statements. These statements have been prepared on a basis that is substantially consistent with the accounting principles applied to the Company's audited Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2016.2017.

The information furnished in these interim statements reflects all adjustments which are, in the opinion of management, necessary for a fair statement of the results for each respective period presented. Such adjustments are of a normal, recurring nature. The results of operations in the interim statements are not necessarily indicative of the results that may be expected for any other quarter or for the full year. The interim financial information should be read in conjunction with the Company's audited Consolidated Financial Statements.
Business combinations
Business combinations are accounted for under the acquisition method of accounting in accordance with ASC 805, Business Combinations. Under the acquisition method, the acquiring entity in a business combination recognizes all of the acquired assets and assumed liabilities at their estimated fair values as of the date of acquisition. Any excess of the purchase price over the fair value of net assets and other identifiable intangible assets acquired is recorded as goodwill. To the extent the fair value of net assets acquired, including identified intangible assets, exceeds the purchase price, a bargain purchase gain is recognized. Changes to estimated fair values from a business combination are recognized as an adjustment to goodwill during the measurement period and are recognized in the proper reporting period in which the adjustment amounts are determined. Results of operations of an acquired business are included in the Consolidated Income Statement from the date of acquisition. Acquisition-related costs, including conversion and restructuring charges, are expensed as incurred.
Investment securities
Investment securities may be classified as HTM, AFS, or measured at fair value. The appropriate classification is initially decided at the time of purchase. Securities classified as HTM are those debt securities that the Company has both the intent and ability to hold to maturity regardless of changes in market conditions, liquidity needs, or general economic conditions. These securities are carried at amortized cost. The sale of a security within three months of its maturity date or after the majority of the principal outstanding has been collected is considered a maturity for purposes of classification and disclosure.
Securities classified as AFS or trading securities measured at fair value are reported as an asset in the Consolidated Balance Sheet at their estimated fair value. As the fair value of AFS debt securities changes, the changes are reported net of income tax as an element of OCI, except for other-than-temporarily-impaired securities. Upon adoption of ASU 2016-01, the fair value changes in AFS equity securities are recognized as part of non-interest income, see "Recently adopted accounting guidance" below for further discussion. When AFS debt securities are sold, the unrealized gain or loss is reclassified from OCI to non-interest income. The changes in the fair values of trading securities are reported in non-interest income. Securities classified as AFS are both equity and debt securities that the Company intends to hold for an indefinite period of time, but not necessarily to maturity. Any decision to sell a security classified as AFS would be based on various factors, including significant movements in interest rates, changes in the maturity mix of the Company’s assets and liabilities, liquidity needs, decline in credit quality, and regulatory capital considerations.
Interest income is recognized based on the coupon rate and increased by accretion of discounts earned or decreased by the amortization of premiums paid over the contractual life of the security, adjusted for prepayment estimates, using the interest method.
In estimating whether there are any OTTI losses, management considers the 1) length of time and the extent to which the fair value has been less than amortized cost; 2) financial condition and near term prospects of the issuer; 3) impact of changes in market interest rates; and 4) intent and ability of the Company to retain its investment for a period of time sufficient to allow for any anticipated recovery in fair value and whether it is not more likely than not the Company would be required to sell the security.
Declines in the fair value of individual AFS debt securities that are deemed to be other-than-temporary are reflected in earnings when identified. The fair value of the debt security then becomes the new cost basis. For individual debt securities where the Company does not intend to sell the security and it is not more likely than not that the Company will be required to sell the security before recovery of its amortized cost basis, the other-than-temporary decline in fair value of the debt security related to 1) credit loss is recognized in earnings; and 2) interest rate, market, or other factors is recognized in other comprehensive income or loss.

For individual debt securities where the Company either intends to sell the security or more likely than not will not recover all of its amortized cost, the OTTI is recognized in earnings equal to the entire difference between the security's cost basis and its fair value at the balance sheet date. For individual debt securities for which a credit loss has been recognized in earnings, interest accruals and amortization and accretion of premiums and discounts are suspended when the credit loss is recognized. Interest received after accruals have been suspended is recognized on a cash basis.
Restricted stock
WAB is a member of the Federal Reserve System and, as part of its membership, is required to maintain stock in the FRB in a specified ratio to its capital. In addition, WAB is a member of the FHLB system and, accordingly, maintains an investment in capital stock of the FHLB based on the borrowing capacity used. The Bank also maintains an investment in its primary

correspondent bank. All of these investments are considered equity securities with no actively traded market. Therefore, the shares are considered restricted investment securities. These investments are carried at cost, which is equal to the value at which they may be redeemed. The dividend income received from the stock is reported in interest income. The Company conducts a periodic review and evaluation of its restricted stock to determine if any impairment exists. No impairment has been recorded to date.
Loans, held for sale
Loans, held for sale consist of SBA loans that the Company originates (or acquires) and intends to sell. These loans are carried at the lower of aggregate cost or fair value. Fair value is determined based on available market data for similar assets, expected cash flows, and appraisals of underlying collateral or the credit quality of the borrower. Gains and losses on the sale of loans are recognized pursuant to ASC 860, Transfers and Servicing. Interest income of these loans is accrued daily and loan origination fees and costs are deferred and included in the cost basis of the loan. The Company issues various representations and warranties associated with these loan sales. The Company has not experienced any losses as a result of these representations and warranties.
Loans, held for investment
The Company generally holds loans for investment and has the intent and ability to hold loans until their maturity. Therefore, they are reported at book value. Net loans are stated at the amount of unpaid principal, adjusted for net deferred fees and costs, purchase accounting fair value adjustments, and an allowance for credit losses. In addition, the book value of loans that are subject to a fair value hedge is adjusted for changes in value attributable to the effective portion of the hedged benchmark interest rate risk.
The Company may also acquire loans through a business combination. These acquired loans are recorded at estimated fair value on the date of purchase, which is comprised of unpaid principal adjusted for estimated credit losses and interest rate fair value adjustments. Loans are evaluated individually at the acquisition date to determine if there has been credit deterioration since origination. Such loans may then be aggregated and accounted for as a pool of loans based on common characteristics. When the Company acquires such loans, the yield that may be accreted (accretable yield) is limited to the excess of the Company’s estimate of undiscounted cash flows expected to be collected over the Company’s initial investment in the loan. The excess of contractual cash flows over the cash flows expected to be collected may not be recognized as an adjustment to yield, loss, or a valuation allowance. Subsequent increases in cash flows expected to be collected generally are recognized prospectively through adjustment of the loan’s yield over the remaining life. Subsequent decreases to cash flows expected to be collected are recognized as impairment. The Company may not carry over or create a valuation allowance in the initial accounting for loans acquired under these circumstances. For purchased loans that are not deemed impaired at the acquisition date, fair value adjustments attributable to both credit and interest rates are accreted (or amortized) over the contractual life of the individual loan. For additional information, see "Note 3. Loans, Leases and Allowance for Credit Losses" of these Notes to Unaudited Consolidated Financial Statements.
Loan fees collected for the origination of loans less direct loan origination costs (net deferred loan fees) are amortized over the contractual life of the loan through interest income. If the loan has scheduled payments, the amortization of the net deferred loan fee is calculated using the interest method over the contractual life of the loan. If the loan does not have scheduled payments, such as a line of credit, the net deferred loan fee is recognized as interest income on a straight-line basis over the contractual life of the loan commitment. Commitment fees based on a percentage of a customer’s unused line of credit and fees related to standby letters of credit are recognized over the commitment period. When loans are repaid, any remaining unamortized balances of premiums, discounts, or net deferred fees are recognized as interest income.
Non-accrual loans: When a borrower discontinues making payments as contractually required by the note, the Company must determine whether it is appropriate to continue to accrue interest. The Company ceases accruing interest income when the loan has become delinquent by more than 90 days or when management determines that the full repayment of principal and

collection of interest according to contractual terms is no longer likely. The Company may decide to continue to accrue interest on certain loans more than 90 days delinquent if the loans are well secured by collateral and in the process of collection.
For all loan types, when a loan is placed on non-accrual status, all interest accrued but uncollected is reversed against interest income in the period in which the status is changed and, the Company makes a loan-level decision to apply either the cash basis or cost recovery method. The Company recognizes income on a cash basis only for those non-accrual loans for which the collection of the remaining principal balance is not in doubt. Under the cost recovery method, subsequent payments received from the customer are applied to principal and generally no further interest income is recognized until the principal has been paid in full or until circumstances have changed such that payments are again consistently received as contractually required.

Impaired loans: A loan is identified as impaired when it is no longer probable that interest and principal will be collected according to the contractual terms of the original loan agreement. Generally, impaired loans are classified as non-accrual. However, in certain instances, impaired loans may continue on an accrual basis, if full repayment of all principal and interest is expected and the loan is both well secured and in the process of collection. Impaired loans are measured for reserve requirements in accordance with ASC 310, Receivables, based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral less applicable disposition costs if the loan is collateral dependent. The amount of an impairment reserve, if any, and any subsequent changes are recorded as a provision for credit losses. Losses are recorded as a charge-off when losses are confirmed. In addition to management's internal loan review process, regulators may from time to time direct the Company to modify loan grades, loan impairment calculations, or loan impairment methodology.
Troubled Debt Restructured Loans: A TDR loan is a loan on which the Company, for reasons related to a borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. The loan terms that have been modified or restructured due to a borrower’s financial situation include, but are not limited to, a reduction in the stated interest rate, an extension of the maturity or renewal of the loan at an interest rate below current market, a reduction in the face amount of the debt, a reduction in the accrued interest, or deferral of interest payments. A TDR loan is also considered impaired. A TDR loan may be returned to accrual status when the loan is brought current, has performed in accordance with the contractual restructured terms for a reasonable period of time (generally six months) and the ultimate collectability of the total contractual restructured principal and interest is no longer in doubt. However, such loans continue to be considered impaired. Consistent with regulatory guidance, a TDR loan that is subsequently modified in another restructuring agreement but has shown sustained performance and classification as a TDR, will be removed from TDR status provided that the modified terms were market-based at the time of modification.
Allowance for credit losses
Credit risk is inherent in the business of extending loans and leases to borrowers, for which the Company must maintain an adequate allowance for credit losses. The allowance for credit losses is established through a provision for credit losses recorded to expense. Loans are charged against the allowance for credit losses when management believes that the contractual principal or interest will not be collected. Subsequent recoveries, if any, are credited to the allowance. The allowance is an amount believed adequate to absorb estimated probable losses on existing loans that may become uncollectable, based on evaluation of the collectability of loans and prior credit loss experience, together with other factors. The Company formally re-evaluates and establishes the appropriate level of the allowance for credit losses on a quarterly basis.
The allowance consists of specific and general components. The specific allowance applies to impaired loans. For impaired collateral dependent loans, the reserve is calculated based on the collateral value, net of estimated disposition costs. Generally, the Company obtains independent collateral valuation analysis for each loan every twelve months. Loans not collateral dependent are evaluated based on the expected future cash flows discounted at the original contractual interest rate.
The general allowance covers all non-impaired loans and incorporates several quantitative and qualitative factors, which are used for all of the Company's portfolio segments. Quantitative factors include company-specific, ten-year historical net charge-offs stratified by loans with similar characteristics. Qualitative factors include: 1) levels of and trends in delinquencies and impaired loans; 2) levels of and trends in charge-offs and recoveries; 3) trends in volume and terms of loans; 4) changes in underwriting standards or lending policies; 5) experience, ability, depth of lending staff; 6) national and local economic trends and conditions; 7) changes in credit concentrations; 8) out-of-market exposures; 9) changes in quality of loan review system; and 10) changes in the value of underlying collateral.
Due to the credit concentration of the Company's loan portfolio in real estate secured loans, the value of collateral is heavily dependent on real estate values in Arizona, Nevada, and California. While management uses the best information available to make its evaluation, future adjustments to the allowance may be necessary if there are significant changes in economic or other conditions. In addition, regulators, as an integral part of their examination processes, periodically review the Bank's allowance for credit losses, and may require the Bank to make additions to the allowance based on their judgment about information

available to them at the time of their examination. Management regularly reviews the assumptions and formulae used in determining the allowance and makes adjustments if required to reflect the current risk profile of the portfolio.

Goodwill and other intangible assets
The Company records as goodwill the excess of the purchase price over the fair value of the identifiable net assets acquired in accordance with applicable guidance. The Company performs its annual goodwill and intangibles impairment tests as of October 1 each year, or more often if events or circumstances indicate that the carrying value may not be recoverable. The Company can first elect to assess, through qualitative factors, whether it is more likely than not that goodwill is impaired. If the qualitative assessment indicates potential impairment, the Company will proceed with a two-step process. The first step tests for impairment, while the second step, if necessary, measures the impairment. The resulting impairment amount, if any, is charged to current period earnings as non-interest expense.
The Company’s intangible assets consist primarily of core deposit intangible assets that are amortized over periods ranging from 5 to 10 years. The Company considers the remaining useful lives of its core deposit intangible assets each reporting period, as required by ASC 350, Intangibles—Goodwill and Other, to determine whether events and circumstances warrant a revision to the remaining period of amortization. If the estimate of an intangible asset’s remaining useful life has changed, the remaining carrying amount of the intangible asset is amortized prospectively over the revised remaining useful life. The Company has not revised its estimates of the useful lives of its core deposit intangibles during the three and six months ended June 30, 2017March 31, 2018 and 2016.2017.
Other assets acquired through foreclosure
Other assets acquired through foreclosure consist primarily of properties acquired as a result of, or in-lieu-of, foreclosure. Properties or other assets (primarily repossessed assets formerly leased) are classified as OREO and other repossessed property and are initially reported at fair value of the asset less estimated selling costs. Subsequent adjustments are based on the lower of carrying value or fair value less estimated costs to sell the property. Costs related to the development or improvement of the assets are capitalized and costs related to holding the assets are charged to non-interest expense. Property is evaluated regularly to ensure the recorded amount is supported by its current fair value and valuation allowances.
Treasury Sharesshares
The Company separately presents treasury shares, which represent shares surrendered to the Company equal in value to the statutory payroll tax withholding obligations arising from the vesting of employee restricted stock awards. Treasury shares are carried at cost.
Derivative financial instruments
The Company uses interest-rate swaps to mitigate interest-rate risk associated with changes to 1) the fair value of certain fixed-rate financial instruments (fair value hedges) and 2) certain cash flows related to future interest payments on variable rate financial instruments (cash flow hedges).
The Company recognizes derivatives as assets or liabilities in the Consolidated Balance Sheet at their fair value in accordance with ASC 815, Derivatives and Hedging. The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and further, on the type of hedging relationship. On the date the derivative contract is entered into, the Company designates the derivative as a fair value hedge or cash flow hedge. Derivative instruments designated in a hedge relationship to mitigate exposure to changes in the fair value of an asset or liability attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivative instruments designated in a hedge relationship to mitigate exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges.
Changes in the fair value of a derivative that is designated and qualifies as a fair value hedge, along with changes in the fair value of the hedged asset or liability that are attributable to the hedged risk are recorded in current-period earnings. For a cash flow hedge, the effective portion of the change in the fair value of the derivative is recorded in AOCI and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Any ineffective portion of the change in fair value of a cash flow hedge is recognized immediately in non-interest income in the Consolidated Income Statement. Under both the fair value and cash flow hedge scenarios, changes in the fair value of derivatives not considered to be highly effective in hedging the change in fair value or the expected cash flows of the hedged item are recognized in earnings as non-interest income during the period of the change.
The Company documents its hedge relationships, including identification of the hedging instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transaction at the time the derivative contract is

executed. Both at inception and at least quarterly thereafter, the Company assesses whether the derivatives used in hedging transactions are highly effective (as defined in the guidance) in offsetting changes in either the fair value or cash flows of the

hedged item. Retroactive effectiveness is assessed, as well as the continued expectation that the hedge will remain effective prospectively. The Company discontinues hedge accounting prospectively when it is determined that a hedge is no longer highly effective. When hedge accounting is discontinued on a fair value hedge that no longer qualifies as an effective hedge, the derivative continues to be reported at fair value in the Consolidated Balance Sheet, but the carrying amount of the hedged item is no longer adjusted for future changes in fair value. The adjustment to the carrying amount of the hedged item that existed at the date hedge accounting is discontinued is amortized over the remaining life of the hedged item into earnings.
Derivative instruments that are not designated as hedges, so called free-standing derivatives, are reported in the Consolidated Balance Sheet at fair value and the changes in fair value are recognized in earnings as non-interest income during the period of change.
The Company may in the normal course of business purchase a financial instrument or originate a loan that contains an embedded derivative instrument. Upon purchasing the instrument or originating the loan, the Company assesses whether the economic characteristics of the embedded derivative are clearly and closely related to the economic characteristics of the remaining component of the financial instrument (i.e., the host contract) and whether a separate instrument with the same terms as the embedded instrument would meet the definition of a derivative instrument. When it is determined that the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract and a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is separated from the host contract and carried at fair value. However, in cases where the host contract is measured at fair value, with changes in fair value reported in current earnings, or the Company is unable to reliably identify and measure an embedded derivative for separation from its host contract, the entire contract is carried in the Consolidated Balance Sheet at fair value and is not designated as a hedging instrument.
Income taxes
The Company is subject to income taxes in the United States and files a consolidated federal income tax return with all of its subsidiaries, with the exception of BW Real Estate, Inc. Deferred income taxes are recorded to reflect the effects of temporary differences between the financial reporting carrying amounts of assets and liabilities and their income tax bases using enacted tax rates that are expected to be in effect when the taxes are actually paid or recovered. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes.
Net deferred tax assets are recorded to the extent that these assets will more-likely-than-not be realized. In making these determinations, all available positive and negative evidence is considered, including scheduled reversals of deferred tax liabilities, tax planning strategies, projected future taxable income, and recent operating results. If it is determined that deferred income tax assets to be realized in the future are in excess of their net recorded amount, an adjustment to the valuation allowance will be recorded, which will reduce the Company's provision for income taxes.
A tax benefit from an unrecognized tax benefit may be recognized when it is more-likely-than-not that the position will be sustained upon examination, including related appeals or litigation, based on technical merits. Income tax benefits must meet a more-likely-than-not recognition threshold at the effective date to be recognized.
Interest and penalties related to unrecognized tax benefits are recognized as part of the provision for income taxes in the Consolidated Income Statement. Accrued interest and penalties are included in the related tax liability line with other liabilities in the Consolidated Balance Sheet. See "Note 11. Income Taxes" of these Notes to Unaudited Consolidated Financial Statements for further discussion on income taxes.
Off-balance sheet instruments
In the ordinary course of business, the Company has entered into off-balance sheet financial instrument arrangements consisting of commitments to extend credit and standby letters of credit. Such financial instruments are recorded in the Consolidated Financial Statements when they are funded. They involve, to varying degrees, elements of credit risk in excess of amounts recognized in the Consolidated Balance Sheet. Losses would be experienced when the Company is contractually obligated to make a payment under these instruments and must seek repayment from the borrower, which may not be as financially sound in the current period as they were when the commitment was originally made. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Company enters into credit arrangements that generally provide for the termination of advances in the event of a covenant violation or other event of default. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case

basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the party. The commitments are collateralized by the same types of assets used as loan collateral.
As with outstanding loans, the Company applies qualitative factors and utilization rates to its off-balance sheet obligations in determining an estimate of losses inherent in these contractual obligations. The estimate for credit losses on off-balance sheet instruments is included in other liabilities and the charge to income that establishes this liability is included in non-interest expense.
The Company also has off-balance sheet arrangements related to its derivative instruments. Derivative instruments are recognized in the Consolidated Financial Statements at fair value and their notional values are carried off-balance sheet. See "Note 9. Derivatives and Hedging Activities" of these Notes to Unaudited Consolidated Financial Statements for further discussion.
Business combinations
Business combinations are accounted for under the acquisition method of accounting in accordance with ASC 805, Business Combinations. Under the acquisition method, the acquiring entity in a business combination recognizes all of the acquired assets and assumed liabilities at their estimated fair values as of the date of acquisition. Any excess of the purchase price over the fair value of net assets and other identifiable intangible assets acquired is recorded as goodwill. To the extent the fair value of net assets acquired, including identified intangible assets, exceeds the purchase price, a bargain purchase gain is recognized. Changes to estimated fair values from a business combination are recognized as an adjustment to goodwill during the measurement period and are recognized in the proper reporting period in which the adjustment amounts are determined. Results of operations of an acquired business are included in the Consolidated Income Statement from the date of acquisition. Acquisition-related costs, including conversion and restructuring charges, are expensed as incurred.

Fair values of financial instruments
The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities. ASC 820, Fair Value Measurement, establishes a framework for measuring fair value and a three-level valuation hierarchy for disclosure of fair value measurement, as well as enhances disclosure requirements for fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The Company uses various valuation approaches, including market, income, and/or cost approaches. ASC 820 establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would consider in pricing the asset or liability developed based on the best information available in the circumstances. The hierarchy is broken down into three levels based on the reliability of inputs, as follows:
Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
Level 2 - 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 instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, prepayment speeds, volatilities, etc.) or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market.
Level 3 - Valuation is generated from model-based techniques where one or more significant inputs are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of matrix pricing, discounted cash flow models, and similar techniques.
The availability of observable inputs varies based on the nature of the specific financial instrument. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety.
Fair value is a market-based measure considered from the perspective of a market participant who may purchase the asset or assume the liability rather than an entity-specific measure. When market assumptions are available, ASC 820 requires the Company to make assumptions regarding the assumptions that market participants would use to estimate the fair value of the financial instrument at the measurement date.
ASC 825, Financial Instruments, requires disclosure of fair value information about financial instruments, whether or not recognized in the balance sheet, for which it is practicable to estimate that value.
Management uses its best judgment in estimating the fair value of the Company’s financial instruments; however, there are inherent limitations in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates presented herein are not necessarily indicative of the amounts the Company could have realized in a sales transaction at

June 30, 2017 March 31, 2018 and 2016.2017. The estimated fair value amounts for June 30,March 31, 2018 and 2017 and 2016 have been measured as of period-end, and have not been re-evaluated or updated for purposes of these Consolidated Financial Statements subsequent to those dates. As such, the estimated fair values of these financial instruments subsequent to the reporting date may be different than the amounts reported at period-end.
The information in "Note 13. Fair Value Accounting" in these Notes to Unaudited Consolidated Financial Statements should not be interpreted as an estimate of the fair value of the entire Company since a fair value calculation is only required for a limited portion of the Company’s assets and liabilities.
Due to the wide range of valuation techniques and the degree of subjectivity used in making the estimate, comparisons between the Company’s disclosures and those of other companies or banks may not be meaningful.

The following methods and assumptions were used by the Company in estimating the fair value of its financial instruments:
Cash and cash equivalents
The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks approximate their fair value.
Money market investments
The carrying amounts reported in the Consolidated Balance Sheets for money market investments approximate their fair value.
Investment securities
The fair values of CRA investments, exchange-listed preferred stock, and certain corporate debt securities are based on quoted market prices and are categorized as Level 1 in the fair value hierarchy.
The fair values of other investment securities were determined based on matrix pricing. Matrix pricing is a mathematical technique that utilizes observable market inputs including, for example, yield curves, credit ratings, and prepayment speeds. Fair values determined using matrix pricing are generally categorized as Level 2 in the fair value hierarchy.
During the year ended December 31, 2016, the Company's CDO securities were transferred from Level 3 to Level 2 as a result of an increase in the availability and reliability of the observable inputs utilized in the securities' fair value measurement. Previously, quoted prices and quoted prices for similar assets were not available. Therefore, the Company would engage a third party to estimate the future cash flows and discount rate using third party quotes adjusted based on assumptions a market participant would assume necessary for each specific security, which resulted in fair values for these securities being categorized as Level 3 in the fair value hierarchy.
Restricted stock
WAB is a member of the Federal Reserve System and the FHLB and, accordingly, maintains investments in the capital stock of the FRB and the FHLB. WAB also maintains an investment in its primary correspondent bank. These investments are carried at cost since no ready market exists for them, and they have no quoted market value. The Company conducts a periodic review and evaluation of its restricted stock to determine if any impairment exists. The fair values of these investments have been categorized as Level 2 in the fair value hierarchy.
Loans
The fair value of loans is estimated based on discounted cash flows using interest rates currently being offered for loans with similar terms to borrowers with similar credit quality and adjustments that the Company believes a market participant would consider in determining fair value based on a third party independent valuation. As a result, the fair value for loans is categorized as Level 2 in the fair value hierarchy, excluding impaired loans which are categorized as Level 3.
Accrued interest receivable and payable
The carrying amounts reported in the Consolidated Balance Sheets for accrued interest receivable and payable approximate their fair value.

Derivative financial instruments
All derivatives are recognized in the Consolidated Balance Sheets at their fair value. The fair value for derivatives is determined based on market prices, broker-dealer quotations on similar products, or other related input parameters. As a result, the fair values have been categorized as Level 2 in the fair value hierarchy.
Deposits
The fair value disclosed for demand and savings deposits is by definition equal to the amount payable on demand at their reporting date (that is, their carrying amount), which the Company believes a market participant would consider in determining fair value. The carrying amount for variable-rate deposit accounts approximates their fair value. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on these deposits. The fair value measurement of the deposit liabilities is categorized as Level 2 in the fair value hierarchy.
FHLB advances and customer repurchase agreements
The fair values of the Company’s borrowings are estimated using discounted cash flow analyses, based on the market rates for similar types of borrowing arrangements. The FHLB advances and customer repurchase agreements have been categorized as Level 2 in the fair value hierarchy due to their short durations.
Subordinated debt
The fair value of subordinated debt is based on the market rate for the respective subordinated debt security. Subordinated debt has been categorized as Level 3 in the fair value hierarchy.

Junior subordinated debt
Junior subordinated debt is valued based on a discounted cash flow model which uses as inputs Treasury Bond rates and the 'BB' rated financial index. Junior subordinated debt has been categorized as Level 3 in the fair value hierarchy.
Off-balance sheet instruments
The fair value of the Company’s off-balance sheet instruments (lending commitments and standby letters of credit) is based on quoted fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements, and the counterparties’ credit standing.
Income taxes
The Company is subject to income taxes in the United States and files a consolidated federal income tax return with all of its subsidiaries, with the exception of BW Real Estate, Inc. Deferred income taxes are recorded to reflect the effects of temporary differences between the financial reporting carrying amounts of assets and liabilities and their income tax bases using enacted tax rates that are expected to be in effect when the taxes are actually paid or recovered. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes.
Net deferred tax assets are recorded to the extent that these assets will more-likely-than-not be realized. In making these determinations, all available positive and negative evidence is considered, including scheduled reversals of deferred tax liabilities, tax planning strategies, projected future taxable income, and recent operating results. If it is determined that deferred income tax assets to be realized in the future are in excess of their net recorded amount, an adjustment to the valuation allowance will be recorded, which will reduce the Company's provision for income taxes.
A tax benefit from an unrecognized tax benefit may be recognized when it is more-likely-than-not that the position will be sustained upon examination, including related appeals or litigation, based on technical merits. Income tax benefits must meet a more-likely-than-not recognition threshold at the effective date to be recognized.
Interest and penalties related to unrecognized tax benefits are recognized as part of the provision for income taxes in the Consolidated Income Statement. Accrued interest and penalties are included in the related tax liability line with other liabilities in the Consolidated Balance Sheet. See "Note 11. Income Taxes" of these Notes to Unaudited Consolidated Financial Statements for further discussion on income taxes.
Non-interest income
Non-interest income includes service charges and fees, card income, income from equity investments, income from bank owned life insurance, foreign currency income, lending related income and gains (losses) on sale of loans, gains and losses on sales of investment securities, and other income. Service charges and fees are composed of fees earned from performing account analysis and general account services, fees earned in lieu of compensating balances, and other deposit account services. Service charges and fees are accounted for in accordance with ASC 606, Revenue from Contracts with Customers, and are recognized as the related services are provided. Card income includes fees earned from customer use of debit and credit cards, interchange income from merchants, and international charges. Card income is generally in the scope of ASC 310, Receivables, however, certain processing transactions for merchants, such as interchange fees, are in scope of ASC 606. Income from equity investments includes gains on equity warrant assets, SBIC equity income, and success fees. Income from bank owned life insurance is accounted for in accordance with ASC 325, Investments - Other. Foreign currency income represents fees earned on the differential between purchases and sales of foreign currency on behalf of the Company’s clients. Lending related fees include fees earned from gains or losses on the sale of loans, SBA income, and letter of credit fees. Gains and losses on the sale of loans and SBA income are recognized pursuant to ASC 860, Transfers and Servicing. Fees related to standby letters of credit are accounted for in accordance with ASC 440, Commitments. Other income includes operating lease income, which is recognized on a straight-line basis over the lease term in accordance with ASC 840, Leases. Net (gain) loss on sales / valuations of repossessed and other assets may also be presented in non-interest income in the event that a gain is recognized upon sale. Gains and losses on the sale of repossessed and other assets are accounted for in accordance with ASC 610, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets. See "Note 15. Revenue from Contracts with Customers" of these Notes to Unaudited Consolidated Financial Statements for further details related to the nature and timing of revenue recognition for non-interest income revenue streams within the scope of the new standard.

Recent accounting pronouncements
In February 2016, the FASB issued guidance within ASU 2016-02, Leases. The amendments in ASU 2016-02 to Topic 842, Leases, require lessees to recognize the lease assets and lease liabilities arising from operating leases in the statement of financial position. The accounting applied by a lessor is largely unchanged from that applied under previous GAAP. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. Management is in its implementation assessment stage, which includes identifying the population of the Company's leases that are within the scope of the new guidance, gathering all key lease data, and considering new lease software options that will facilitate application of the new accounting requirements.
In June 2016, the FASB issued guidance within ASU 2016-13, Measurement of Credit Losses on Financial Instruments. The amendments in ASU 2016-13 to Topic 326, Financial Instruments - Credit Losses, require that an organization measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The ASU also requires enhanced disclosures, including qualitative and quantitative disclosures that provide additional information about the amounts recorded in the financial statements. Additionally, the ASU amends the accounting for credit losses on AFS debt securities and purchased financial assets with credit deterioration. The amendments in this ASU are effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Management has formed a Steering Committee and established an implementation team made up of subject matter experts across different functions within the Company, including Finance, Risk, Credit, and IT, that will facilitate all phases of planning and implementation of the new guidance. Under the direction of the Company's CECL Steering Committee and in partnership with its Enterprise Project Management Office, the implementation team has completed its gap assessment and are fully engaged with the implementation of its plan. Key initiatives underway include model development, data adequacy and formation, accounting policy drafting and software solution installations. Further, the team is also in the process of evaluating its control framework to identify risks resulting from new processes, judgments, and data.
In March 2017, the FASB issued guidance within ASU 2017-08, Premium Amortization on Purchased Callable Debt Securities. The amendments in ASU 2017-08 to Subtopic 310-20, Receivables-Nonrefundable Fees and Other Costs, shorten the amortization period for certain purchased callable debt securities held at a premium to the earliest call date, which more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities. Under current GAAP, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments in this ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. The adoption of this guidance is not expected to have a significant impact on the Company's Consolidated Financial Statements.
Recently adopted accounting guidance
In May 2014, the FASB issued guidance within ASU 2014-09, Revenue from Contracts with Customers. The amendments in ASU 2014-09 to TopicASC 606, Revenue from Contracts with Customers, creates a common revenue standard and clarifies the principles for recognizing revenue that can be applied consistently across various transactions, industries, and capital markets. The amendments in the ASU clarify 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. As part of that principle, the entity should identify the contract(s) with the customer, identify the performance obligation(s) of the contract, determine the transaction price, allocate that transaction price to the performance obligation(s) of the contract, and then recognize revenue when or as the entity satisfies the performance obligation(s). In August 2015,The Company adopted ASU 2014-09 on January 1, 2018 using the FASB issued ASU 2015-14, Revenue from Contracts with Customers - Deferral of the Effective Date, which deferred the original effective date of ASU No. 2014-09 by one year. Accordingly, the amendments in ASU No. 2014-09 will be effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that annual reporting period. The amendments will be applied through the election of one of twomodified retrospective methods.method. Substantially all of the Company's revenue is generated from interest income related to loans and investment securities, which are not within the scope of this guidance. The contracts that are within the scope of this guidance include service charges and fees on deposit accounts, certain types of card income, and warrant related income. While thesuccess fees earned from equity investments. The Company is completinghas completed its review of contracts and other agreements to be prepared for adoptionthat are within the scope of this guidance on January 1, 2018, including presentationand did not identify any material changes to the timing or amount of prior periods,revenue recognition. The Company’s accounting policies did not change materially since the principles of revenue recognition in the ASU are largely consistent with current practices applied by the Company. The Company does not expect the adoption will have ahas expanded its qualitative disclosures of performance obligations and disaggregation of significant impact on its Consolidated Financial Statements.categories of revenue. See "Note 15. Revenue from Contracts with Customers" for further discussion.

In January 2016, the FASB issued guidance within ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in ASU 2016-01 to Subtopic 825-10, Financial Instruments, contain the following elements: 1) requires equity investments to be measured at fair value with changes in fair value recognized in net income; 2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; 3) eliminates the requirement for public 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; 4) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; 5) requires an entity to present separately in OCI 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; 6) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or accompanying notes to the financial statements; 7) clarifies that the entity should evaluate the need for a valuation allowance on a deferred tax asset related to AFS securities in combination with the entity's other deferred tax assets. The amendments are effective for fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. Except forEffective on January 1, 2015, the early application ofCompany adopted the amendment noted in item 5) above which the Company elected to early adopt effective January 1, 2015 as discussed in the Company's Annual Report on Form 10-K for the year ended December 31, 2015, early adoption of2015. Effective on January 1, 2018, the amendments in this Update is not permitted. The adoption ofCompany adopted the other amendments in this guidance is not expected to have a materialguidance. The primary impact on the Company's Consolidated Financial Statements.
In February 2016,Statements results from the FASB issued guidance within ASU 2016-02, Leases. The amendments discussed in ASU 2016-02 to Topic 842, Leases, require lessees to recognize the lease assets and lease liabilities arising from operating leasesitem 1) above as changes in the statement of financial position. The accounting applied by a lessor is largely unchanged from that applied under previous GAAP. The amendments in this Update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. Management is in the early stages of its implementation assessment, which includes identifying the populationfair value of the Company's leases thatequity investments are withinnow recognized in net income, rather than in AOCI. As of January 1, 2018, the scopeCompany recorded a cumulative-effect adjustment of $0.4 million to decrease accumulated other comprehensive income with a corresponding increase to opening retained earnings. During the new guidance, gathering all key lease data, and considering new lease software options that will facilitate applicationthree months ended March 31, 2018, the Company recognized a loss of the new accounting requirements.
In June 2016, the FASB issued guidance within ASU 2016-13, Measurement of Credit Losses on Financial Instruments. The amendments$1.1 million related to fair value changes in ASU 2016-13 to Topic 326, Financial Instruments - Credit Losses, require that an organization measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The ASU also requires enhanced disclosures, including qualitative and quantitative disclosures that provide additional information about the amountsequity securities, which was recorded in the financial statements. Additionally, the ASU amends the accounting for credit losses on AFS debt securities and purchased financial assets with credit deterioration. The amendments in this Update are effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Management has formed a Steering Committee and an implementation team led by a full-time project manager that will facilitate all phases of planning and implementation of the new guidance. The implementation team is in the process of compiling key data elements and has engaged a third party to assist in developing models that will meet the requirements of the new guidance.Consolidated Income Statement.
In August 2016, the FASB issued guidance within ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments. The amendments in ASU 2016-15 to Topic 230, Statement of Cash Flows, provide guidance on eight specific cash flow classification issues: 1) debt prepayment or debt extinguishment costs; 2) settlement of zero-coupon debt instruments; 3) contingent consideration payments made after a business combination; 4) proceeds from the settlement of insurance claims; 5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; 6) distributions received from equity method investments; 7) beneficial interest in securitization transactions; and 8) separately identifiable cash flows and the application of the predominance principle. The amendments in this Update are effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. However, an entity is required to adopt all of the amendments in the same period. The amendments in this Update should be applied using a retrospective transition method to each period presented. The adoption of this guidance isdid not expected to have a significant impact on the Company's Consolidated Statement of Cash Flows.
In January 2017, the FASB issued guidance within ASU 2017-01, Clarifying the Definition of a Business. The amendments in ASU 2017-01 to Topic 805, Business Combinations, clarify the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments in this Update should be applied prospectively and are effective for annual periods beginning after December 31, 2017, including interim periods within those periods. The adoption of this guidance isdid not expected to have a materialsignificant impact on the Company's Consolidated Financial Statements.

In January 2017, the FASB issued guidance within ASU 2017-04, Simplifying the Test for Goodwill Impairment. The amendments in ASU 2017-04 to Topic 350, Intangibles - Goodwill and Other, modify the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value. Accordingly, the amendments eliminate Step 2 from the goodwill impairment test because goodwill impairment will no longer be determined by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments in this Update should be applied on a prospective basis and are effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed after January 1, 2017. The adoption of this guidance isdid not expected to have a materialsignificant impact on the Company's Consolidated Financial Statements.
In February 2017, the FASB issued guidance within ASU 2017-05, Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets. The amendments in ASU 2017-05 to Subtopic 610-20, Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets, clarify the scope of Subtopic 610-20 and add guidance for partial sales of nonfinancial assets, including partial sales of real estate. Under current GAAP, there are several different accounting models to evaluate whether the transfer of certain assets qualify for sale treatment. The new standard reduces the number of potential accounting models that might apply and clarifies which model does apply in various circumstances. An entity may elect to apply the amendments in this Update either retrospectively to each period presented in the financial statements or, retrospectively with a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. The amendments in this Update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Early adoption is permitted for annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The adoption of this guidance isdid not expected to have a materialsignificant impact on the Company's Consolidated Financial Statements.
In March 2017, the FASB issued guidance within ASU 2017-08, Premium Amortization on Purchased Callable Debt Securities. The amendments in ASU 2017-08 to Subtopic 310-20, Receivables-Nonrefundable Fees and Other Costs, shorten the amortization period for certain purchased callable debt securities held at a premium to the earliest call date, which more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities. Under current GAAP, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments in this Update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The amendments in this Update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.
In May 2017, the FASB issued guidance within ASU 2017-09, Scope of Modification Accounting. The amendments in ASU 2017-09 to Topic 718, Compensation - Stock Compensation, provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. An entity should account for the effects of a modification unless all of the following conditions are met: the fair value of the modified award is the same as the fair value of the original award immediately before the original award is modified; the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified; and the classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. The amendments in this Update should be applied prospectively to an award modified on or after the adoption date. The amendments in this Update are effective for annual periods, and interim periods within those annual periods, beginning after December 31, 2017. Early adoption is permitted, including adoption in any interim period. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements.

Recently adopted accounting guidance
In November 2015, the FASB issued guidance within ASU 2015-17, Income Taxes. The amendments in ASU 2015-17 to Topic 740, Income Taxes, changes the presentation of deferred income tax liabilities and assets, from previously bifurcated current and noncurrent, to a single noncurrent amount on the classified statement of financial position. The amendment was effective for the annual period ending after December 15, 2016, and for and interim periods within those annual periods. The adoption of this guidance did not have a materialsignificant impact on the Company's Consolidated Financial Statements.
In March 2016,February 2018, the FASB issued guidance within ASU 2016-05,2018-02, EffectReclassification of Derivative Contract NovationsCertain Tax Effects from Accumulated Other Comprehensive Income. Under current GAAP, the effect of a change in tax laws or rates on Existing Hedge Accounting Relationships.deferred tax liabilities and assets are included in income from continuing operations even in situations in which the related income tax effects of items in AOCI were originally recognized in comprehensive income. Accordingly, as the adjustment of deferred taxes due to the reduction of the historical corporate income tax rate to the newly enacted corporate income tax rate is required to be included in income from continuing operations, the tax effects of items within AOCI do not reflect the current tax rate. The amendments in ASU 2016-052018-02 to Topic 815, Derivatives and Hedging, clarify that220, Income Statement - Reporting Comprehensive Income, allow a change inreclassification from AOCI to retained earnings from tax effects resulting from the counterpartyTCJA. The Company elected to a derivative instrument that has been designated as the hedging instrument under Topic 815 does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. The amendments in this Update were effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. The adoption ofadopt this guidance did not haveeffective January 1, 2018 and recorded a material impact on the Company's Consolidated Financial Statements.cumulative-effect adjustment of $0.7 million to decrease accumulated other comprehensive income with a corresponding increase to opening retained earnings.

2. INVESTMENT SECURITIES
The carrying amounts and fair values of investment securities at June 30, 2017March 31, 2018 and December 31, 20162017 are summarized as follows: 
 June 30, 2017 March 31, 2018
 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value
 (in thousands) (in thousands)
Held-to-maturity                
Tax-exempt $132,802
 $4,759
 $(35) $137,526
 $262,304
 $795
 $(7,681) $255,418
                
Available-for-sale                
CDO $50
 $15,503
 $
 $15,553
 $50
 $19,403
 $
 $19,453
Commercial MBS issued by GSEs 118,535
 45
 (3,253) 115,327
 110,347
 60
 (5,434) 104,973
Corporate debt securities 65,051
 376
 (1,505) 63,922
 105,040
 140
 (3,504) 101,676
CRA investments 49,854
 
 (372) 49,482
 51,771
 
 (925) 50,846
Preferred stock 93,007
 4,668
 (169) 97,506
 92,959
 1,191
 (832) 93,318
Private label residential MBS 685,477
 1,133
 (6,362) 680,248
 839,655
 32
 (20,691) 818,996
Residential MBS issued by GSEs 1,566,373
 3,398
 (14,634) 1,555,137
 1,676,686
 210
 (49,997) 1,626,899
Tax-exempt 398,281
 11,015
 (5,107) 404,189
 499,045
 6,083
 (7,207) 497,921
Trust preferred securities 32,000
 
 (2,595) 29,405
 32,000
 
 (3,383) 28,617
U.S. government sponsored agency securities 74,000
 
 (2,609) 71,391
 64,000
 
 (3,710) 60,290
U.S. treasury securities 2,496
 4
 (2) 2,498
 2,496
 
 (23) 2,473
Total AFS securities $3,085,124
 $36,142
 $(36,608) $3,084,658
 $3,474,049
 $27,119
 $(95,706) $3,405,462
  December 31, 2016
  Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value
  (in thousands)
Held-to-maturity        
Tax-exempt $92,079
 $433
 $(546) $91,966

        
Available-for-sale        
CDO $50
 $13,440
 $
 $13,490
Commercial MBS issued by GSEs 121,742
 
 (3,950) 117,792
Corporate debt securities 65,058
 371
 (1,285) 64,144
CRA investments 37,627
 
 (514) 37,113
Preferred stock 96,071
 833
 (2,242) 94,662
Private label residential MBS 440,272
 182
 (6,769) 433,685
Residential MBS issued by GSEs 1,369,289
 3,046
 (17,130) 1,355,205
Tax-exempt 409,693
 8,477
 (9,937) 408,233
Trust preferred securities 32,000
 
 (5,468) 26,532
U.S. government sponsored agency securities 59,000
 
 (2,978) 56,022
U.S. treasury securities 2,496
 6
 
 2,502
Total AFS securities $2,633,298
 $26,355
 $(50,273) $2,609,380
         
Securities measured at fair value        
Residential MBS issued by GSEs       $1,053
During the three months ended June 30, 2017, the Company sold all of its investment securities measured at fair value. No significant gain or loss was recognized upon sale of these securities. For additional information on the fair value changes of securities measured at fair value, see the trading securities table in "Note 13. Fair Value Accounting" of these Notes to Unaudited Consolidated Financial Statements.

  December 31, 2017
  Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value
  (in thousands)
Held-to-maturity        
Tax-exempt $255,050
 $4,514
 $(3,250) $256,314
         
Available-for-sale        
CDO $50
 $21,807
 $
 $21,857
Commercial MBS issued by GSEs 113,069
 46
 (4,038) 109,077
Corporate debt securities 105,044
 261
 (1,822) 103,483
CRA investments 51,133
 
 (517) 50,616
Preferred stock 52,172
 1,160
 (136) 53,196
Private label residential MBS 874,261
 756
 (6,493) 868,524
Residential MBS issued by GSEs 1,719,188
 810
 (30,703) 1,689,295
Tax-exempt 501,988
 10,893
 (1,971) 510,910
Trust preferred securities 32,000
 
 (3,383) 28,617
U.S. government sponsored agency securities 64,000
 
 (2,538) 61,462
U.S. treasury securities 2,496
 
 (14) 2,482
Total AFS securities $3,515,401
 $35,733
 $(51,615) $3,499,519
The Company conducts an OTTI analysis on a quarterly basis. The initial indication of OTTI for both debt and equity securities is a decline in the market value below the amount recorded for an investment, and taking into account the severity and duration of the decline. Another potential indication of OTTI is a downgrade below investment grade. In determining whether an impairment is OTTI, the Company considers the length of time and the extent to which the market value has been below cost, recent events specific to the issuer, including investment downgrades by rating agencies and economic conditions of its industry, and the Company’s ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery. For marketable equity securities, the Company also considers the issuer’s financial condition, capital strength, and near-term prospects.

For debt securities, for the purpose of an OTTI analysis, the Company also considers the cause of the price decline (general level of interest rates, credit spreads, and industry and issuer-specific factors), the issuer’s financial condition, near-term prospects, and current ability to make future payments in a timely manner, as well as the issuer’s ability to service debt, and any change in agencies’ ratings at the evaluation date from the acquisition date and any likely imminent action.
The Company has reviewed securities for which there is an unrealized loss in accordance with its accounting policy for OTTI described above and determined that there are no impairment charges for the three and six months ended June 30, 2017March 31, 2018 and 2016.2017. The Company does not consider any securities to be other-than-temporarily impaired as of June 30, 2017March 31, 2018 and December 31, 2016.2017. No assurance can be made that OTTI will not occur in future periods.
Information pertaining to securities with gross unrealized losses at June 30, 2017March 31, 2018 and December 31, 2016,2017, aggregated by investment category and length of time that individual securities have been in a continuous loss position follows: 
June 30, 2017March 31, 2018
Less Than Twelve Months More Than Twelve Months TotalLess Than Twelve Months More Than Twelve Months Total
Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair ValueGross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value
(in thousands)(in thousands)
Held-to-maturity           
Held-to-Maturity           
Tax-exempt$35
 $15,165
 $
 $
 $35
 $15,165
$7,681
 $208,272
 $
 $
 $7,681
 $208,272
Available-for-sale                      
Commercial MBS issued by GSEs$3,253
 $98,719
 $
 $
 $3,253
 $98,719
$262
 $11,999
 $5,172
 $91,109
 $5,434
 $103,108
Corporate debt securities1,505
 58,495
 
 
 1,505
 58,495
2,200
 57,799
 1,304
 38,696
 3,504
 96,495
CRA investments372
 49,482
 
 
 372
 49,482

 
 925
 50,846
 925
 50,846
Preferred stock169
 5,684
 
 
 169
 5,684
832
 47,808
 
 
 832
 47,808
Private label residential MBS5,602
 438,389
 760
 29,349
 6,362
 467,738
13,613
 625,316
 7,078
 188,584
 20,691
 813,900
Residential MBS issued by GSEs14,117
 983,921
 517
 32,932
 14,634
 1,016,853
25,817
 1,096,496
 24,180
 512,464
 49,997
 1,608,960
Tax-exempt5,107
 131,136
 
 
 5,107
 131,136
3,278
 173,905
 3,929
 67,415
 7,207
 241,320
Trust preferred securities
 
 2,595
 29,405
 2,595
 29,405

 
 3,383
 28,617
 3,383
 28,617
U.S. government sponsored agency securities2,609
 56,391
 
 
 2,609
 56,391
94
 4,906
 3,616
 55,384
 3,710
 60,290
U.S. treasury securities2
 1,503
 
 
 2
 1,503
23
 2,473
 
 
 23
 2,473
Total AFS securities$32,736
 $1,823,720
 $3,872
 $91,686
 $36,608
 $1,915,406
$46,119
 $2,020,702
 $49,587
 $1,033,115
 $95,706
 $3,053,817
December 31, 2016December 31, 2017
Less Than Twelve Months More Than Twelve Months TotalLess Than Twelve Months More Than Twelve Months Total
Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair ValueGross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value
(in thousands)(in thousands)
Held-to-maturity                      
Tax-exempt$546
 $30,364
 $
 $
 $546
 $30,364
$3,250
 $107,921
 $
 $
 $3,250
 $107,921
Available-for-sale                      
Commercial MBS issued by GSEs$3,950
 $117,792
 $
 $
 $3,950
 $117,792
$161
 $13,565
 $3,877
 $93,641
 $4,038
 $107,206
Corporate debt securities1,285
 38,716
 
 
 1,285
 38,716
1,398
 78,602
 424
 19,576
 1,822
 98,178
CRA investments514
 37,113
 
 
 514
 37,113

 
 517
 50,616
 517
 50,616
Preferred stock2,188
 63,151
 54
 1,471
 2,242
 64,622
136
 7,357
 
 
 136
 7,357
Private label residential MBS6,170
 377,638
 599
 16,969
 6,769
 394,607
3,115
 480,885
 3,378
 188,710
 6,493
 669,595
Residential MBS issued by GSEs16,990
 950,480
 140
 5,326
 17,130
 955,806
13,875
 999,478
 16,828
 523,270
 30,703
 1,522,748
Tax-exempt9,937
 148,780
 
 
 9,937
 148,780
17
 6,159
 1,954
 69,674
 1,971
 75,833
Trust preferred securities
 
 5,468
 26,532
 5,468
 26,532

 
 3,383
 28,617
 3,383
 28,617
U.S. government sponsored agency securities2,978
 56,022
 
 
 2,978
 56,022
14
 4,986
 2,524
 56,476
 2,538
 61,462
U.S. treasury securities14
 2,482
 
 
 14
 2,482
Total AFS securities$44,012
 $1,789,692
 $6,261
 $50,298
 $50,273
 $1,839,990
$18,730
 $1,593,514
 $32,885
 $1,030,580
 $51,615
 $2,624,094

At June 30, 2017March 31, 2018 and December 31, 2016,2017, the Company’s unrealized losses relate primarily to market interest rate fluctuations and tightening of credit spreads in applicable markets.increases since the securities' original purchase date. The total number of securities in an unrealized loss position at June 30, 2017March 31, 2018 is 219,401, compared to 244302 at December 31, 2016.2017. In analyzing an issuer’s financial condition, management considers whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and industry analysis reports. Since material downgrades have not occurred and management does not intend to sell the debt securities in an unrealized loss position in the foreseeable future, none of the securities described in the above table or in this paragraph are deemed to be OTTI.
The trust preferred securities have yields based on floating rate LIBOR, which are highly correlated to the federal funds rate and have been negatively affected by the low rate environment. This has resulted in unrealized losses for these securities.
The amortized cost and fair value of securities as of June 30, 2017,March 31, 2018, by contractual maturities, are shown below. MBS are shown separately as individual MBS are comprised of pools of loans with varying maturities. Therefore, these securities are listed separately in the maturity summary. 
 June 30, 2017 March 31, 2018
 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value
 (in thousands) (in thousands)
Held-to-maturity        
Due in one year or less $1,200
 $1,208
After one year through five years 10,100
 10,206
After five years through ten years 14,847
 14,475
After ten years $132,802
 $137,526
 236,157
 229,529
Total HTM securities $262,304
 $255,418
        
Available-for-sale        
Due in one year or less $52,131
 $51,823
 $55,801
 $54,879
After one year through five years 67,910
 71,080
 15,947
 16,242
After five years through ten years 260,920
 262,406
 256,070
 251,220
After ten years 333,778
 348,637
 519,543
 532,253
Mortgage-backed securities 2,370,385
 2,350,712
 2,626,688
 2,550,868
Total AFS securities $3,085,124
 $3,084,658
 $3,474,049
 $3,405,462

The following tables summarize the carrying amount of the Company’s investment ratings position as of June 30, 2017March 31, 2018 and December 31, 2016:2017: 
 June 30, 2017 March 31, 2018
 AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals
 (in thousands) (in thousands)
Held-to-maturity                                
Tax-exempt $
 $
 $
 $
 $
 $
 $132,802
 $132,802
 $
 $
 $
 $
 $
 $
 $262,304
 $262,304
                                
Available-for-sale                                
CDO $
 $
 $
 $
 $
 $15,553
 $
 $15,553
 $
 $
 $
 $
 $
 $19,453
 $
 $19,453
Commercial MBS issued by GSEs 
 115,327
 
 
 
 
 
 115,327
 
 104,973
 
 
 
 
 
 104,973
Corporate debt securities 
 
 
 44,722
 19,200
 
 
 63,922
 
 
 
 72,747
 28,929
 
 
 101,676
CRA investments 
 25,215
 
 
 
 
 24,267
 49,482
 
 25,078
 
 
 
 
 25,768
 50,846
Preferred stock 
 
 
 10,617
 66,453
 4,339
 16,097
 97,506
 
 
 
 10,118
 64,444
 4,031
 14,725
 93,318
Private label residential MBS 617,783
 
 57,209
 1,776
 1,353
 2,127
 
 680,248
 748,064
 
 67,405
 998
 879
 1,650
 
 818,996
Residential MBS issued by GSEs 
 1,555,137
 
 
 
 
 
 1,555,137
 
 1,626,899
 
 
 
 
 
 1,626,899
Tax-exempt 36,655
 25,286
 222,009
 118,347
 
 
 1,892
 404,189
 62,746
 24,635
 243,818
 163,250
 
 
 3,472
 497,921
Trust preferred securities 
 
 
 
 29,405
 
 
 29,405
 
 
 
 
 28,617
 
 
 28,617
U.S. government sponsored agency securities 
 71,391
 
 
 
 
 
 71,391
 
 60,290
 
 
 
 
 
 60,290
U.S. treasury securities 
 2,498
 
 
 
 
 
 2,498
 
 2,473
 
 
 
 
 
 2,473
Total AFS securities (1) $654,438
 $1,794,854
 $279,218
 $175,462
 $116,411
 $22,019
 $42,256
 $3,084,658
 $810,810
 $1,844,348
 $311,223
 $247,113
 $122,869
 $25,134
 $43,965
 $3,405,462
(1)Where ratings differ, the Company uses an average of the available ratings by S&P, Moody’s, and/or Fitch.major credit agencies.

 December 31, 2016 December 31, 2017
 AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals
 (in thousands) (in thousands)
Held-to-maturity                                
Tax-exempt $
 $
 $
 $
 $
 $
 $92,079
 $92,079
 $
 $
 $
 $
 $
 $
 $255,050
 $255,050
Available-for-sale                                
CDO $
 $
 $
 $
 $
 $13,490
 $
 $13,490
 $
 $
 $
 $
 $
 $21,857
 $
 $21,857
Commercial MBS issued by GSEs 
 117,792
 
 
 
 
 
 117,792
 
 109,077
 
 
 
 
 
 109,077
Corporate debt securities 
 
 5,429
 38,715
 20,000
 
 
 64,144
 
 
 
 74,293
 29,190
 
 
 103,483
CRA investments 
 
 
 
 
 
 37,113
 37,113
 
 25,349
 
 
 
 
 25,267
 50,616
Preferred stock 
 
 
 
 64,486
 14,658
 15,518
 94,662
 
 
 
 10,388
 23,822
 4,104
 14,882
 53,196
Private label residential MBS 399,013
 
 29,921
 2,117
 2,634
 
 
 433,685
 809,242
 
 55,161
 1,350
 931
 1,840
 
 868,524
Residential MBS issued by GSEs 
 1,355,205
 
 
 
 
 
 1,355,205
 
 1,689,295
 
 
 
 
 
 1,689,295
Tax-exempt 80,862
 
 268,249
 59,122
 
 
 
 408,233
 64,893
 25,280
 249,200
 167,994
 
 
 3,543
 510,910
Trust preferred securities 
 
 
 
 26,532
 
 
 26,532
 
 
 
 
 28,617
 
 
 28,617
U.S. government sponsored agency securities 
 56,022
 
 
 
 
 
 56,022
 
 61,462
 
 
 
 
 
 61,462
U.S. treasury securities 
 2,502
 
 
 
 
 
 2,502
 
 2,482
 
 
 
 
 
 2,482
Total AFS securities (1) $479,875
 $1,531,521
 $303,599
 $99,954
 $113,652
 $28,148
 $52,631
 $2,609,380
 $874,135
 $1,912,945
 $304,361
 $254,025
 $82,560
 $27,801
 $43,692
 $3,499,519
                
Securities measured at fair value                
Residential MBS issued by GSEs $
 $1,053
 $
 $
 $
 $
 $
 $1,053
(1)Where ratings differ, the Company uses an average of the available ratings by S&P, Moody’s, and/or Fitch.major credit agencies.

Securities with carrying amounts of approximately $991.1 million$1.01 billion and $763.0$913.7 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively, were pledged for various purposes as required or permitted by law.

The following table presents gross gains and losses on sales of investment securities: 
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 2017 2016 2018 2017
 (in thousands) (in thousands)
Gross gains $78
 $
 $713
 $2,057
 $
 $636
Gross losses (125) 
 (125) (1,056) 
 (1)
Net (losses) gains on sales of investment securities $(47) $
 $588
 $1,001
Net gains on sales of investment securities $
 $635

3. LOANS, LEASES AND ALLOWANCE FOR CREDIT LOSSES
The composition of the Company’s held for investment loan portfolio is as follows: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Commercial and industrial $6,236,083
 $5,755,021
 $6,944,381
 $6,841,381
Commercial real estate - non-owner occupied 3,649,108
 3,543,956
 3,925,301
 3,904,011
Commercial real estate - owner occupied 2,021,226
 2,013,276
 2,264,650
 2,241,613
Construction and land development 1,601,705
 1,478,114
 1,957,489
 1,632,204
Residential real estate 334,800
 259,432
 418,127
 425,940
Commercial leases 82,429
 100,765
Consumer 47,908
 38,963
 50,505
 48,786
Loans, net 13,973,259
 13,189,527
Loans, net of deferred loan fees and costs 15,560,453
 15,093,935
Allowance for credit losses (131,811) (124,704) (144,659) (140,050)
Total loans HFI $13,841,448
 $13,064,823
 $15,415,794
 $14,953,885
Net deferred loan fees and costs as of June 30, 2017March 31, 2018 and December 31, 20162017 total $20.4$32.6 million and $22.3$25.3 million, respectively, which is a reduction in the carrying value of loans. Net unamortized purchase discounts on loanssecondary market loan purchases total $7.4$8.0 million and $5.2$8.5 million as of June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively. Total loans held for investment are also net of interest rate and credit marks on acquired loans, which are a net reduction in the carrying value of loans. Interest rate marks were $20.7$13.0 million and $22.2$14.1 million as of June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively. Credit marks were $37.8$23.1 million and $47.3$27.0 million as of June 30, 2017March 31, 2018 and December 31, 2016, respectively.
As of June 30, 2017, and December 31, 2016, the Company also has $16.7 million and $18.9 million of HFS loans, respectively.
The following table presents the contractual aging of the recorded investment in past due loans held for investment by class of loans:
 June 30, 2017 March 31, 2018
 Current 30-59 Days
Past Due
 60-89 Days
Past Due
 Over 90 Days
Past Due
 Total
Past Due
 Total Current 30-59 Days
Past Due
 60-89 Days
Past Due
 Over 90 Days Past Due Total
Past Due
 Total
 (in thousands) (in thousands)
Commercial and industrial $6,932,086
 $5,094
 $4,970
 $2,231
 $12,295
 $6,944,381
Commercial real estate                        
Owner occupied $2,016,000
 $1,120
 $248
 $3,858
 $5,226
 $2,021,226
 2,263,102
 1,418
 
 130
 1,548
 2,264,650
Non-owner occupied 3,413,497
 
 594
 654
 1,248
 3,414,745
 3,732,372
 
 
 2,799
 2,799
 3,735,171
Multi-family 234,363
 
 
 
 
 234,363
 190,130
 
 
 
 
 190,130
Commercial and industrial            
Commercial 6,230,151
 668
 2,465
 2,799
 5,932
 6,236,083
Leases 82,409
 
 20
 
 20
 82,429
Construction and land development                        
Construction 1,072,426
 
 
 
 
 1,072,426
 1,259,939
 
 
 
 
 1,259,939
Land 527,996
 
 
 1,283
 1,283
 529,279
 697,550
 
 
 
 
 697,550
Residential real estate 327,871
 232
 687
 6,010
 6,929
 334,800
 413,726
 1,397
 
 3,004
 4,401
 418,127
Consumer 47,690
 58
 5
 155
 218
 47,908
 49,907
 
 259
 339
 598
 50,505
Total loans $13,952,403
 $2,078
 $4,019
 $14,759
 $20,856
 $13,973,259
 $15,538,812
 $7,909
 $5,229
 $8,503
 $21,641
 $15,560,453
 

 December 31, 2016 December 31, 2017
 Current 30-59 Days
Past Due
 60-89 Days
Past Due
 Over 90 Days
Past Due
 Total
Past Due
 Total Current 30-59 Days
Past Due
 60-89 Days
Past Due
 Over 90 days
Past Due
 Total
Past Due
 Total
 (in thousands) (in thousands)
Commercial and industrial $6,835,385
 $2,245
 $669
 $3,082
 $5,996
 $6,841,381
Commercial real estate                        
Owner occupied $2,009,728
 $71
 $
 $3,477
 $3,548
 $2,013,276
 2,240,457
 1,026
 
 130
 1,156
 2,241,613
Non-owner occupied 3,339,121
 672
 2
 
 674
 3,339,795
 3,696,729
 2,993
 
 2,847
 5,840
 3,702,569
Multi-family 204,161
 
 
 
 
 204,161
 201,442
 
 
 
 
 201,442
Commercial and industrial            
Commercial 5,747,368
 549
 584
 6,520
 7,653
 5,755,021
Leases 100,761
 
 
 4
 4
 100,765
Construction and land development                        
Construction 973,242
 
 
 
 
 973,242
 1,090,176
 
 
 
 
 1,090,176
Land 503,588
 
 
 1,284
 1,284
 504,872
 536,917
 
 
 5,111
 5,111
 542,028
Residential real estate 249,726
 4,333
 281
 5,092
 9,706
 259,432
 411,857
 6,874
 1,487
 5,722
 14,083
 425,940
Consumer 38,765
 26
 2
 170
 198
 38,963
 48,408
 83
 213
 82
 378
 48,786
Total loans $13,166,460
 $5,651
 $869
 $16,547
 $23,067
 $13,189,527
 $15,061,371
 $13,221
 $2,369
 $16,974
 $32,564
 $15,093,935
The following table presents the recorded investment in non-accrual loans and loans past due ninety days or more and still accruing interest by class of loans: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 Non-accrual loans Loans past due 90 days or more and still accruing Non-accrual loans Loans past due 90 days or more and still accruing Non-accrual loans Loans past due 90 days or more and still accruing Non-accrual loans Loans past due 90 days or more and still accruing
 Current Past Due/
Delinquent
 Total
Non-accrual
 Current Past Due/
Delinquent
 Total
Non-accrual
  Current Past Due/
Delinquent
 Total
Non-accrual
 Current Past Due/
Delinquent
 Total
Non-accrual
 
 (in thousands) (in thousands)
Commercial and industrial $16,103
 $8,081
 $24,184
 $37
 $17,913
 $4,113
 $22,026
 $43
Commercial real estate                                
Owner occupied $4,084
 $3,858
 $7,942
 $
 $5,084
 $3,264
 $8,348
 $285
 
 131
 131
 
 1,089
 792
 1,881
 
Non-owner occupied 2,474
 308
 2,782
 345
 8,317
 1
 8,318
 
 
 2,799
 2,799
 
 
 5,840
 5,840
 
Multi-family 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial and industrial                
Commercial 9,566
 4,716
 14,282
 147
 10,893
 6,043
 16,936
 775
Leases 18
 
 18
 
 28
 3
 31
 
Construction and land developmentConstruction and land development              Construction and land development              
Construction 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land 
 1,284
 1,284
 
 
 1,284
 1,284
 
 
 
 
 
 868
 5,111
 5,979
 
Residential real estate 1,127
 2,481
 3,608
 3,529
 99
 5,093
 5,192
 
 6,127
 3,717
 9,844
 
 2,039
 6,078
 8,117
 
Consumer 
 155
 155
 
 
 163
 163
 7
 
 339
 339
 
 
 82
 82
 
Total $17,269
 $12,802
 $30,071
 $4,021
 $24,421
 $15,851
 $40,272
 $1,067
 $22,230
 $15,067
 $37,297
 $37
 $21,909
 $22,016
 $43,925
 $43
The reduction in interest income associated with loans on non-accrual status was approximately $0.6 million and $0.5 million for each of the three months ended June 30, 2017March 31, 2018 and 2016, respectively, and$1.2 million and $0.9 million for the six months ended June 30, 2017 and 2016, respectively.2017.
The Company utilizes an internal asset classification system as a means of reporting problem and potential problem loans. Under the Company’s risk rating system, the Company classifies problem and potential problem loans as Special Mention, Substandard, Doubtful, and Loss. Substandard loans include those characterized by well-defined weaknesses and carry the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Loans classified as Doubtful, or risk rated nine, have all the weaknesses inherent in those classified as Substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The final rating of Loss covers loans considered uncollectible and having such little recoverable value that it is not practical to defer writing off the asset. Loans that do not currently expose the Company to sufficient risk to warrant classification in one of the aforementioned categories, but possess weaknesses that warrant management’s close attention, are deemed to be Special Mention. Risk ratings are updated, at a minimum, quarterly.

The following tables present gross loans by risk rating: 
 June 30, 2017 March 31, 2018
 Pass Special Mention Substandard Doubtful Loss Total Pass Special Mention Substandard Doubtful Loss Total
 (in thousands) (in thousands)
Commercial and industrial $6,756,803
 $100,928
 $82,499
 $4,151
 $
 $6,944,381
Commercial real estate                        
Owner occupied $1,950,186
 $17,877
 $50,828
 $2,335
 $
 $2,021,226
 2,168,305
 42,472
 53,232
 641
 
 2,264,650
Non-owner occupied 3,367,136
 10,658
 36,951
 
 
 3,414,745
 3,696,971
 26,716
 11,484
 
 
 3,735,171
Multi-family 234,363
 
 
 
 
 234,363
 190,130
 
 
 
 
 190,130
Commercial and industrial            
Commercial 6,058,156
 89,063
 88,864
 
 
 6,236,083
Leases 82,411
 
 18
 
 
 82,429
Construction and land development                        
Construction 1,051,677
 9,678
 11,071
 
 
 1,072,426
 1,255,462
 4,477
 
 
 
 1,259,939
Land 513,966
 12,879
 2,434
 
 
 529,279
 695,821
 905
 824
 
 
 697,550
Residential real estate 325,593
 828
 8,379
 
 
 334,800
 398,814
 9,146
 10,167
 
 
 418,127
Consumer 47,640
 53
 215
 
 
 47,908
 49,613
 58
 834
 
 
 50,505
Total $13,631,128
 $141,036
 $198,760
 $2,335
 $
 $13,973,259
 $15,211,919
 $184,702
 $159,040
 $4,792
 $
 $15,560,453
 June 30, 2017 March 31, 2018
 Pass Special Mention Substandard Doubtful Loss Total Pass Special Mention Substandard Doubtful Loss Total
 (in thousands) (in thousands)
Current (up to 29 days past due) $13,629,028
 $140,755
 $181,028
 $1,592
 $
 $13,952,403
 $15,206,755
 $184,306
 $143,622
 $4,129
 $
 $15,538,812
Past due 30 - 59 days 550
 103
 1,425
 
 
 2,078
 5,091
 374
 2,444
 
 
 7,909
Past due 60 - 89 days 1,454
 31
 2,534
 
 
 4,019
 73
 22
 5,134
 
 
 5,229
Past due 90 days or more 96
 147
 13,773
 743
 
 14,759
 
 
 7,840
 663
 
 8,503
Total $13,631,128
 $141,036
 $198,760
 $2,335
 $
 $13,973,259
 $15,211,919
 $184,702
 $159,040
 $4,792
 $
 $15,560,453
 
 December 31, 2016 December 31, 2017
 Pass Special Mention Substandard Doubtful Loss Total Pass Special Mention Substandard Doubtful Loss Total
 (in thousands) (in thousands)
Commercial and industrial $6,675,574
 $85,781
 $76,328
 $3,698
 $
 $6,841,381
Commercial real estate                        
Owner occupied $1,935,322
 $53,634
 $22,090
 $2,230
 $
 $2,013,276
 2,149,465
 43,122
 48,397
 629
 
 2,241,613
Non-owner occupied 3,278,090
 22,972
 38,733
 
 
 3,339,795
 3,676,711
 11,166
 14,692
 
 
 3,702,569
Multi-family 203,964
 197
 
 
 
 204,161
 201,442
 
 
 
 
 201,442
Commercial and industrial            
Commercial 5,621,448
 70,011
 58,562
 5,000
 
 5,755,021
Leases 100,737
 
 28
 
 
 100,765
Construction and land development                        
Construction 961,290
 
 11,952
 
 
 973,242
 1,072,342
 4,477
 13,357
 
 
 1,090,176
Land 501,569
 337
 2,966
 
 
 504,872
 535,412
 637
 5,979
 
 
 542,028
Residential real estate 252,304
 929
 6,199
 
 
 259,432
 408,527
 8,971
 8,442
 
 
 425,940
Consumer 38,698
 64
 201
 
 
 38,963
 47,824
 878
 84
 
 
 48,786
Total $12,893,422
 $148,144
 $140,731
 $7,230
 $
 $13,189,527
 $14,767,297
 $155,032
 $167,279
 $4,327
 $
 $15,093,935
 

 December 31, 2016 December 31, 2017
 Pass Special Mention Substandard Doubtful Loss Total Pass Special Mention Substandard Doubtful Loss Total
 (in thousands) (in thousands)
Current (up to 29 days past due) $12,887,308
 $147,838
 $124,084
 $7,230
 $
 $13,166,460
 $14,758,149
 $154,295
 $145,934
 $2,993
 $
 $15,061,371
Past due 30 - 59 days 5,433
 96
 122
 
 
 5,651
 7,966
 518
 4,737
 
 
 13,221
Past due 60 - 89 days 410
 210
 249
 
 
 869
 1,182
 219
 968
 
 
 2,369
Past due 90 days or more 271
 
 16,276
 
 
 16,547
 
 
 15,640
 1,334
 
 16,974
Total $12,893,422
 $148,144
 $140,731
 $7,230
 $
 $13,189,527
 $14,767,297
 $155,032
 $167,279
 $4,327
 $
 $15,093,935
The table below reflects the recorded investment in loans classified as impaired: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Impaired loans with a specific valuation allowance under ASC 310 (1) $8,295
 $10,909
 $9,598
 $19,315
Impaired loans without a specific valuation allowance under ASC 310 (2) 97,339
 88,300
 87,994
 79,239
Total impaired loans $105,634
 $99,209
 $97,592
 $98,554
Valuation allowance related to impaired loans (3) $(3,878) $(4,239) $(5,562) $(5,606)
(1)Includes TDR loans of $6.9$3.0 million and $2.5$3.7 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
(2)Includes TDR loans of $48.3$48.2 million and $58.3$48.8 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
(3)Includes valuation allowance related to TDR loans of $2.6$1.0 million and $0.6$1.2 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
The following table presents impaired loans by class: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Commercial and industrial $43,459
 $34,156
Commercial real estate        
Owner occupied $20,928
 $20,748
 8,107
 10,430
Non-owner occupied 21,957
 25,524
 17,654
 21,251
Multi-family 
 
 
 
Commercial and industrial    
Commercial 33,197
 21,107
Leases 341
 355
Construction and land development        
Construction 
 
 
 
Land 12,146
 14,838
 9,812
 15,426
Residential real estate 16,867
 16,391
 18,185
 17,170
Consumer 198
 246
 375
 121
Total $105,634
 $99,209
 $97,592
 $98,554
A valuation allowance is established for an impaired loan when the fair value of the loan is less than the recorded investment. In certain cases, portions of impaired loans are charged-off to realizable value instead of establishing a valuation allowance and are included, when applicable, in the table above as “Impaired loans without a specific valuation allowance under ASC 310.” However, before concluding that an impaired loan needs no associated valuation allowance, an assessment is made to consider all available and relevant information for the method used to evaluate impairment and the type of loan being assessed. The valuation allowance disclosed above is included in the allowance for credit losses reported in the Consolidated Balance Sheets as of June 30, 2017March 31, 2018 and December 31, 2016.2017.

The following table presents the average investment in impaired loans and income recognized on impaired loans: 
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 2017 2016 2018 2017
 (in thousands) (in thousands)
Average investment in impaired loans $107,816
 $109,833
 $105,504
 $116,173
Average balance on impaired loans $93,081
 $103,387
Interest income recognized on impaired loans 1,115
 1,050
 2,035
 2,163
 873
 921
Interest recognized on non-accrual loans, cash basis 350
 225
 678
 397
 438
 332
The following table presents the average investment in impaired loans by loan class: 
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 2017 2016 2018 2017
 (in thousands) (in thousands)
Commercial and industrial $36,849
 $26,101
Commercial real estate            
Owner occupied $21,500
 $19,075
 $21,314
 $20,406
 9,043
 21,128
Non-owner occupied 22,149
 31,894
 23,274
 32,463
 18,925
 24,399
Multi-family 
 
 
 
 
 
Commercial and industrial        
Commercial 33,557
 24,299
 29,646
 28,001
Leases 343
 333
 355
 1,191
Construction and land development            
Construction 
 
 
 
 
 
Land 12,956
 18,299
 13,694
 18,099
 10,281
 14,432
Residential real estate 17,107
 15,635
 17,007
 15,700
 17,799
 17,103
Consumer 204
 298
 214
 313
 184
 224
Total $107,816
 $109,833
 $105,504
 $116,173
 $93,081
 $103,387
The average investment in TDR loans was $57.5$48.3 million and $72.1$60.4 million for the three months ended June 30,March 31, 2018 and 2017, and 2016, respectively, and $58.9 million and $75.1 million for the six months ended June 30, 2017 and 2016, respectively.
The following table presents interest income on impaired loans by class: 
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 2017 2016 2018 2017
 (in thousands) (in thousands)
Commercial and industrial $250
 $144
Commercial real estate            
Owner occupied $188
 $247
 $364
 $542
 127
 177
Non-owner occupied 280
 313
 519
 651
 262
 239
Multi-family 
 
 
 
 
 
Commercial and industrial        
Commercial 333
 121
 473
 229
Leases 4
 4
 7
 36
Construction and land development            
Construction 
 
 
 
 
 
Land 166
 239
 388
 446
 130
 221
Residential real estate 143
 125
 282
 256
 104
 139
Consumer 1
 1
 2
 3
 
 1
Total $1,115
 $1,050
 $2,035
 $2,163
 $873
 $921
The Company is not committed to lend significant additional funds on these impaired loans.

The following table summarizes nonperforming assets: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Non-accrual loans (1) $30,071
 $40,272
 $37,297
 $43,925
Loans past due 90 days or more on accrual status (2) 4,021
 1,067
 37
 43
Accruing troubled debt restructured loans 44,221
 53,637
 43,766
 42,431
Total nonperforming loans 78,313
 94,976
 81,100
 86,399
Other assets acquired through foreclosure, net 30,988
 47,815
 30,194
 28,540
Total nonperforming assets $109,301
 $142,791
 $111,294
 $114,939
(1)Includes non-accrual TDR loans of $11.0$7.4 million and $7.1$10.1 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
(2)Includes $0.3less than $0.1 million from loans acquired with deteriorated credit quality at each of the periods ended June 30, 2017March 31, 2018 and December 31, 2016.2017.
Loans Acquired with Deteriorated Credit Quality
Changes in the accretable yield for loans acquired with deteriorated credit quality are as follows:  
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 2017 2016 2018 2017
 (in thousands) (in thousands)
Balance, at beginning of period $13,812
 $13,541
 $15,177
 $15,925
 $9,324
 $15,177
Additions due to acquisition 
 4,301
 
 4,301
Reclassifications from non-accretable to accretable yield (1) 2,086
 
 2,086
 
 683
 
Accretion to interest income (777) (887) (1,684) (1,669) (313) (907)
Reversal of fair value adjustments upon disposition of loans (874) (1,092) (1,332) (2,694) (1,586) (458)
Balance, at end of period $14,247
 $15,863
 $14,247
 $15,863
 $8,108
 $13,812
(1)The primary drivers of reclassification from non-accretable to accretable yield resulted from changes in estimated cash flows.

Allowance for Credit Losses
The following table summarizes the changes in the allowance for credit losses by portfolio type: 
  Three Months Ended June 30,
  Construction and Land Development Commercial Real Estate Residential Real Estate Commercial and Industrial Consumer Total
  (in thousands)
2017            
Beginning Balance $21,097
 $28,004
 $4,412
 $73,429
 $707
 $127,649
Charge-offs 
 1,819
 332
 651
 8
 2,810
Recoveries (508) (406) (1,299) (1,759) 
 (3,972)
Provision (753) 2,002
 (541) 2,197
 95
 3,000
Ending balance $20,852
 $28,593
 $4,838
 $76,734
 $794
 $131,811
2016            
Beginning Balance $19,425
 $23,104
 $4,938
 $71,156
 $604
 $119,227
Charge-offs 
 244
 
 1,161
 46
 1,451
Recoveries (58) (770) (153) (804) (43) (1,828)
Provision 1,903
 1,237
 (545) (252) 157
 2,500
Ending balance $21,386
 $24,867
 $4,546
 $70,547
 $758
 $122,104
 Six Months Ended June 30, Three Months Ended March 31,
 Construction and Land Development Commercial Real Estate Residential Real Estate Commercial and Industrial Consumer Total Construction and Land Development Commercial Real Estate Residential Real Estate Commercial and Industrial Consumer Total
 (in thousands) (in thousands)
2018            
Beginning Balance $19,511
 $31,495
 $5,478
 $82,793
 $773
 $140,050
Charge-offs 
 
 107
 3,517
 
 3,624
Recoveries (1,388) (126) (250) (459) (10) (2,233)
Provision 1,695
 1,247
 (102) 3,143
 17
 6,000
Ending balance $22,594
 $32,868
 $5,519
 $82,878
 $800
 $144,659
2017                        
Beginning Balance $21,175
 $25,673
 $3,851
 $73,333
 $672
 $124,704
 $21,175
 $25,673
 $3,851
 $73,333
 $672
 $124,704
Charge-offs 
 1,819
 447
 3,245
 42
 5,553
 
 
 115
 2,594
 34
 2,743
Recoveries (785) (938) (1,551) (2,087) (49) (5,410) (277) (533) (251) (328) (49) (1,438)
Provision (1,108) 3,801
 (117) 4,559
 115
 7,250
 (355) 1,798
 425
 2,362
 20
 4,250
Ending balance $20,852
 $28,593
 $4,838
 $76,734
 $794
 $131,811
 $21,097
 $28,004
 $4,412
 $73,429
 $707
 $127,649
2016            
Beginning Balance $18,976
 $23,160
 $5,278
 $71,181
 $473
 $119,068
Charge-offs 
 654
 26
 8,652
 120
 9,452
Recoveries (153) (4,435) (410) (2,380) (110) (7,488)
Provision 2,257
 (2,074) (1,116) 5,638
 295
 5,000
Ending balance $21,386
 $24,867
 $4,546
 $70,547
 $758
 $122,104

The following table presents impairment method information related to loans and allowance for credit losses by loan portfolio segment: 
 Commercial Real Estate-Owner Occupied Commercial Real Estate-Non-Owner Occupied Commercial and Industrial Residential Real Estate Construction and Land Development Commercial Leases Consumer Total Loans Commercial Real Estate-Owner Occupied Commercial Real Estate-Non-Owner Occupied Commercial and Industrial Residential Real Estate Construction and Land Development Consumer Total Loans
 (in thousands) (in thousands)
Loans as of June 30, 2017:              
Recorded Investment:                
Loans as of March 31, 2018;Loans as of March 31, 2018;            
Recorded Investment              
Impaired loans with an allowance recorded $743
 $
 $7,552
 $
 $
 $
 $
 $8,295
 $
 $
 $9,425
 $173
 $
 $
 $9,598
Impaired loans with no allowance recorded 20,186
 21,957
 25,644
 16,867
 12,146
 341
 198
 97,339
 8,107
 17,654
 34,034
 18,012
 9,812
 375
 87,994
Total loans individually evaluated for impairment 20,929
 21,957
 33,196
 16,867
 12,146
 341
 198
 105,634
 8,107
 17,654
 43,459
 18,185
 9,812
 375
 97,592
Loans collectively evaluated for impairment 1,989,251
 3,489,985
 6,202,887
 317,323
 1,589,559
 82,088
 47,710
 13,718,803
 2,248,803
 3,805,229
 6,900,885
 399,346
 1,947,677
 50,130
 15,352,070
Loans acquired with deteriorated credit quality 11,046
 137,166
 
 610
 
 
 
 148,822
 7,740
 102,418
 37
 596
 
 
 110,791
Total recorded investment $2,021,226
 $3,649,108
 $6,236,083
 $334,800
 $1,601,705
 $82,429
 $47,908
 $13,973,259
 $2,264,650
 $3,925,301
 $6,944,381
 $418,127
 $1,957,489
 $50,505
 $15,560,453
Unpaid Principal BalanceUnpaid Principal Balance              Unpaid Principal Balance            
Impaired loans with an allowance recorded $743
 $
 $7,568
 $
 $
 $
 $
 $8,311
 $
 $
 $12,250
 $173
 $
 $
 $12,423
Impaired loans with no allowance recorded 28,552
 29,346
 55,105
 26,174
 29,416
 493
 10,815
 179,901
 15,029
 24,431
 63,541
 26,801
 26,440
 10,950
 167,192
Total loans individually evaluated for impairment 29,295
 29,346
 62,673
 26,174
 29,416
 493
 10,815
 188,212
 15,029
 24,431
 75,791
 26,974
 26,440
 10,950
 179,615
Loans collectively evaluated for impairment 1,989,251
 3,489,985
 6,202,887
 317,323
 1,589,559
 82,088
 47,710
 13,718,803
 2,248,803
 3,805,229
 6,900,885
 399,346
 1,947,677
 50,130
 15,352,070
Loans acquired with deteriorated credit quality 14,551
 166,158
 4,880
 729
 
 
 
 186,318
 9,945
 124,803
 4,412
 715
 
 
 139,875
Total unpaid principal balance $2,033,097
 $3,685,489
 $6,270,440
 $344,226
 $1,618,975
 $82,581
 $58,525
 $14,093,333
 $2,273,777
 $3,954,463
 $6,981,088
 $427,035
 $1,974,117
 $61,080
 $15,671,560
Related Allowance for Credit LossesRelated Allowance for Credit Losses              Related Allowance for Credit Losses            
Impaired loans with an allowance recorded $743
 $
 $3,135
 $
 $
 $
 $
 $3,878
 $
 $
 $5,389
 $173
 $
 $
 $5,562
Impaired loans with no allowance recorded 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total loans individually evaluated for impairment 743
 
 3,135
 
 
 
 
 3,878
 
 
 5,389
 173
 
 
 5,562
Loans collectively evaluated for impairment 12,553
 14,455
 73,597
 4,838
 20,014
 
 794
 126,251
 14,475
 17,566
 77,487
 5,346
 22,594
 800
 138,268
Loans acquired with deteriorated credit quality 
 842
 2
 
 838
 
 
 1,682
 
 827
 2
 
 
 
 829
Total allowance for credit losses $13,296
 $15,297
 $76,734
 $4,838
 $20,852
 $
 $794
 $131,811
 $14,475
 $18,393
 $82,878
 $5,519
 $22,594
 $800
 $144,659

 Commercial Real Estate-Owner Occupied Commercial Real Estate-Non-Owner Occupied Commercial and Industrial Residential Real Estate Construction and Land Development Commercial Leases Consumer Total Loans Commercial Real Estate-Owner Occupied Commercial Real Estate-Non-Owner Occupied Commercial and Industrial Residential Real Estate Construction and Land Development Consumer Total Loans
 (in thousands) (in thousands)
Loans as of December 31, 2016:              
Recorded Investment:                
Loans as of December 31, 2017;Loans as of December 31, 2017;            
Recorded Investment              
Impaired loans with an allowance recorded $3,125
 $
 $7,766
 $
 $
 $
 $18
 $10,909
 $
 $
 $19,315
 $
 $
 $
 $19,315
Impaired loans with no allowance recorded 17,624
 25,524
 13,340
 16,391
 14,838
 355
 228
 88,300
 10,430
 21,250
 14,842
 17,170
 15,426
 121
 79,239
Total loans individually evaluated for impairment 20,749
 25,524
 21,106
 16,391
 14,838
 355
 246
 99,209
 10,430
 21,250
 34,157
 17,170
 15,426
 121
 98,554
Loans collectively evaluated for impairment 1,981,176
 3,383,585
 5,733,915
 242,409
 1,443,952
 100,410
 38,717
 12,924,164
 2,221,614
 3,777,219
 6,807,181
 408,169
 1,616,778
 48,665
 14,879,626
Loans acquired with deteriorated credit quality 11,351
 134,847
 
 632
 19,324
 
 
 166,154
 9,569
 105,542
 43
 601
 
 
 115,755
Total recorded investment $2,013,276
 $3,543,956
 $5,755,021
 $259,432
 $1,478,114
 $100,765
 $38,963
 $13,189,527
 $2,241,613
 $3,904,011
 $6,841,381
 $425,940
 $1,632,204
 $48,786
 $15,093,935
Unpaid Principal Balance                              
Impaired loans with an allowance recorded $3,125
 $
 $8,019
 $
 $
 $
 $18
 $11,162
 $
 $
 $20,795
 $
 $
 $
 $20,795
Impaired loans with no allowance recorded 26,336
 33,632
 43,176
 26,225
 33,487
 507
 1,358
 164,721
 17,459
 28,028
 42,261
 26,057
 32,289
 10,695
 156,789
Total loans individually evaluated for impairment 29,461
 33,632
 51,195
 26,225
 33,487
 507
 1,376
 175,883
 17,459
 28,028
 63,056
 26,057
 32,289
 10,695
 177,584
Loans collectively evaluated for impairment 1,981,176
 3,383,585
 5,733,915
 242,409
 1,443,952
 100,410
 38,717
 12,924,164
 2,221,614
 3,777,219
 6,807,181
 408,169
 1,616,778
 48,665
 14,879,626
Loans acquired with deteriorated credit quality 14,878
 165,275
 925
 738
 19,858
 
 
 201,674
 12,619
 128,440
 3,146
 720
 
 
 144,925
Total unpaid principal balance $2,025,515
 $3,582,492
 $5,786,035
 $269,372
 $1,497,297
 $100,917
 $40,093
 $13,301,721
 $2,251,692
 $3,933,687
 $6,873,383
 $434,946
 $1,649,067
 $59,360
 $15,202,135
Related Allowance for Credit LossesRelated Allowance for Credit Losses              Related Allowance for Credit Losses            
Impaired loans with an allowance recorded $937
 $
 $3,301
 $
 $
 $
 $1
 $4,239
 $
 $
 $5,606
 $
 $
 $
 $5,606
Impaired loans with no allowance recorded 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total loans individually evaluated for impairment 937
 
 3,301
 
 
 
 1
 4,239
 
 
 5,606
 
 
 
 5,606
Loans collectively evaluated for impairment 11,403
 12,646
 69,673
 3,851
 20,398
 
 671
 118,642
 13,884
 16,135
 76,919
 5,500
 19,599
 776
 132,813
Loans acquired with deteriorated credit quality 
 687
 359
 
 777
 
 
 1,823
 
 1,629
 2
 
 
 
 1,631
Total allowance for credit losses $12,340
 $13,333
 $73,333
 $3,851
 $21,175
 $
 $672
 $124,704
 $13,884
 $17,764
 $82,527
 $5,500
 $19,599
 $776
 $140,050

Troubled Debt Restructurings
A TDR loan is a loan on which the Company, for reasons related to a borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. The loan terms that have been modified or restructured due to a borrower’s financial situation include, but are not limited to, a reduction in the stated interest rate, an extension of the maturity or renewal of the loan at an interest rate below current market, a reduction in the face amount of the debt, a reduction in the accrued interest, or deferral of interest payments. The majority of the Company's modifications are extensions in terms or deferral of payments which result in no lost principal or interest followed by reductions in interest rates or accrued interest. A TDR loan is also considered impaired. Consistent with regulatory guidance, a TDR loan that is subsequently modified in another restructuring agreement but has shown sustained performance and classification as a TDR, will be removed from TDR status provided that the modified terms were market-based at the time of modification.
During the three months ended June 30, 2017,March 31, 2018, the Company did not have anyhad five new TDR loans. During the six months ended June 30, 2017, the Company hadloans with a recorded investment of $15.0 million and one new TDR loan with a recorded investment of $4.9 million.million during the three months ended March 31, 2017. No principal amounts were forgiven and there were no waived fees or other expenses resulting from the TDR. The Company did not have any new TDR loansTDRs during the three and six months ended June 30, 2016.March 31, 2018 and 2017.
During the three months ended June 30, 2017, there was one CRE, non-owner occupied TDR loan with a net recorded investment of $0.3 million for which there was a payment default. During the six months ended June 30, 2017,March 31, 2018, there were twono TDR loans with a net recorded investment of $0.4 million for which there was a payment default. During the three months ended June 30, 2016,March 31, 2017, there was one residential real estatecommercial and industrial TDR loan with a net recorded investment of $0.3 million for which there was a payment default. During the six months ended June 30, 2016, there were two TDR loans with a net recorded investment of $5.7$0.1 million for which there was a payment default.
A TDR loan is deemed to have a payment default when it becomes past due 90 days, goes on non-accrual, or is restructured again. Payment defaults, along with other qualitative indicators, are considered by management in the determination of the allowance for credit losses.
At June 30, 2017March 31, 2018, there was one commercial and industrial loan commitment outstanding on TDR loans for less than $0.1 million and at December 31, 20162017 there were no loan commitments outstanding on TDR loans.
Loan Purchases and Sales
For the three months ended June 30,March 31, 2018 and 2017, and 2016, secondary market loan purchases totaled $196.7$141.5 million and $64.6$253.3 million, respectively. For the six months ended June 30, 20172018, these purchased loans consisted of $118.3 million of commercial and 2016, secondary market loan purchases totaled $450.0industrial loans and $23.2 million and $98.3 million, respectively.of residential real estate loans. For 2017, these purchased loans consisted of $347.6$200.3 million of commercial and industrial loans and $102.4$53.0 million of residential real estate loans. For 2016, these purchased loans consisted of commercial and industrial loans.
During the three months ended June 30, 2017, there were no significant secondary market loan sales.March 31, 2018, the Company sold loans which primarily consisted of commercial and industrial loans with a carrying value of $31.0 million and recognized a net gain of $0.7 million. During the sixthree months ended June 30,March 31, 2017, the Company sold CRE loans with a carrying value of $9.2 million and recognized a loss of less than of $0.1 million on the sales. During the three and six months ended June 30, 2016, the Company sold loans, which consisted primarily of CRE and commercial and industrial loans, with a carrying value of $23.8 million and recognized a gain of $2.5 million on the sales.


4. OTHER ASSETS ACQUIRED THROUGH FORECLOSURE
The following table represents the changes in other assets acquired through foreclosure: 
  Three Months Ended June 30, 2017
  Gross Balance Valuation Allowance Net Balance
  (in thousands)
Balance, beginning of period $50,919
 $(5,719) $45,200
Transfers to other assets acquired through foreclosure, net 1,392
 
 1,392
Proceeds from sale of other real estate owned and repossessed assets, net (17,208) 1,826
 (15,382)
Valuation adjustments, net 
 (156) (156)
(Losses) gains, net (1) (66) 
 (66)
Balance, end of period $35,037
 $(4,049) $30,988
       
  Three Months Ended June 30, 2016
Balance, beginning of period $61,346
 $(8,570) $52,776
Transfers to other assets acquired through foreclosure, net 88
 
 88
Proceeds from sale of other real estate owned and repossessed assets, net (4,480) 1,813
 (2,667)
Valuation adjustments, net 
 134
 134
(Losses) gains, net (1) (489) 
 (489)
Balance, end of period $56,465
 $(6,623) $49,842
 Six Months Ended June 30, 2017 Three Months Ended March 31, 2018
 Gross Balance Valuation Allowance Net Balance Gross Balance Valuation Allowance Net Balance
 (in thousands) (in thousands)
Balance, beginning of period $54,138
 $(6,323) $47,815
 $32,552
 $(4,012) $28,540
Transfers to other assets acquired through foreclosure, net 1,392
 
 1,392
 5,744
 
 5,744
Proceeds from sale of other real estate owned and repossessed assets, net (20,321) 2,050
 (18,271) (5,294) 9
 (5,285)
Valuation adjustments, net 
 224
 224
 
 (47) (47)
(Losses) gains, net (1) (172) 
 (172)
Gains (losses), net (1) 1,242
   1,242
Balance, end of period $35,037
 $(4,049) $30,988
 $34,244
 $(4,050) $30,194
            
 Six Months Ended June 30, 2016 Three Months Ended March 31, 2017
Balance, beginning of period $52,984
 $(9,042) $43,942
 $54,138
 $(6,323) $47,815
Transfers to other assets acquired through foreclosure, net 10,726
 
 10,726
Proceeds from sale of other real estate owned and repossessed assets, net (6,916) 2,108
 (4,808) (3,113) 224
 (2,889)
Valuation adjustments, net 
 311
 311
 
 380
 380
(Losses) gains, net (1) (329) 
 (329)
Gains (losses), net (1) (106) 
 (106)
Balance, end of period $56,465
 $(6,623) $49,842
 $50,919
 $(5,719) $45,200
(1)There were $0.1was $1.0 million and zeroin net gains related to initial transfers to other assets during the three and six months ended June 30, 2017March 31, 2018 and 2016, respectively.compared to zero during the three months ended March 31, 2017.
At June 30,March 31, 2018 and 2017, and 2016, the majority of the Company’s repossessed assets consisted of properties located in Nevada. The Company held 2118 properties at June 30, 2017,March 31, 2018, compared to 3119 at December 31, 2016,2017, and 3425 at June 30, 2016.March 31, 2017.

5. OTHER BORROWINGS
The following table summarizes the Company’s borrowings as of June 30, 2017March 31, 2018 and December 31, 2016:2017: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Short-Term:        
FHLB advances $
 $80,000
 $300,000
 $390,000
Total short-term borrowings $
 $80,000
 $300,000
 $390,000
The Company maintains other lines of credit with correspondent banks totaling $168.0 million,$145.0 million. These lines of credit are unsecured, of which $23.0$45.0 million is secured by pledged securities and has a floating interest rate of one-month or three-month LIBOR plus 1.50%. The remaining $145.0 million is unsecured and has a floating interest rate of one-month LIBOR plus 3.25%. and $100.0 million has a rate equivalent to the federal funds effective rate. As of June 30, 2017March 31, 2018 and December 31, 2016,2017, there were no outstanding balances on the Company's lines of credit.
The Company maintains lines of credit with the FHLB and the FRB. The Company’s borrowing capacity is determined based on collateral pledged, generally consisting of investment securities and loans, at the time of the borrowing. At June 30, 2017,March 31, 2018, the Company had no$300.0 million in short-term borrowings.FHLB overnight advances with an interest rate of 1.87%. At December 31, 2016,2017, short-term FHLB advances of $80.0$390.0 million had a weighted averagean interest rate of 0.55%1.41%.
As of June 30, 2017March 31, 2018 and December 31, 2016,2017, the Company had additional available credit with the FHLB of approximately $2.33$2.20 billion and $2.15$1.91 billion, respectively, and with the FRB of approximately $1.16$1.22 billion and $997.0 million,$1.11 billion, respectively.

6. QUALIFYING DEBT
Subordinated Debt
The CompanyParent has $175.0 million of subordinated debentures, with a maturity datewhich was recorded net of issuance costs of $5.5 million, and matures July 1, 2056. Beginning on or after July 1, 2021, the Company may redeem the debentures, in whole or in part, at their principal amount plus any accrued and unpaid interest. The subordinated debt was recorded net of issuance costs of $5.5 million. The debentures have a fixed interest rate of 6.25% per annum.
WAB has $150.0 million of subordinated debt, which was recorded net of debt issuance costs of $1.8 million, and matures July 15, 2025. The subordinated debt has a fixed interest rate of 5.00% through June 30, 2020 and then converts to a variable rate of 3.20% plus three-month LIBOR through maturity.
To hedge the interest rate risk on the Company's subordinated debt issuances, the Company entered into fair value interest rate hedges with receive fixed/pay variable/receive fixedvariable swaps.
The carrying value of all subordinated debt issuances, which includes the effective portionfair value of the related hedges, totals $307.8$297.5 million and $305.8$308.6 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
Junior Subordinated Debt
The Company has formed or acquired through acquisition eight statutory business trusts, which exist for the exclusive purpose of issuing Cumulative Trust Preferred Securities.
With the exception of debt issued by Bridge Capital Trust I and Bridge Capital Trust II, junior subordinated debt is recorded at fair value at each reporting date due to the FVO election made by the Company under ASC 825. The Company did not make the FVO election for the junior subordinated debt acquired as part of the Bridge acquisition. Accordingly, the carrying value of these trusts does not reflect the current fair value of the debt and includes a fair market value adjustment established at acquisition that is being accreted over the remaining life of the trusts.
The carrying value of junior subordinated debt was $67.7$66.4 million and $62.2$68.3 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
The weighted average interest rate of all junior subordinated debt as of June 30, 2017March 31, 2018 was 3.64%4.65%, which is three-month LIBOR plus the contractual spread of 2.34%, compared to a weighted average interest rate of 3.34%4.03% at December 31, 2016.2017.

7. STOCKHOLDERS' EQUITY
Stock-Based Compensation
Restricted Stock Awards
Restricted stock awards granted to employees in 2017 and 2016 generally vest over a three-year period. Stock grants made to non-employee WAL directors during 2017 becamein 2018 will be fully vested at June 30, 2017.2018. The Company estimates the compensation costexpense for stock grants based upon the grant date fair value. Stock compensation costexpense is recognized on a straight-line basis over the requisite service period for the entire award. The aggregate grant date fair value for the restricted stock awards granted during the three and six months ended June 30, 2017March 31, 2018 was $0.3 million and $16.2 million, respectively.$21.9 million. Stock compensation expense related to restricted stock awards and stock options granted to employees are included in Salaries and employee benefits in the Consolidated Income Statement. For restricted stock awards granted to WAL directors, the related stock compensation expense is included in Legal, professional, and directors' fees in the Consolidated Income Statement.fees. For the three and six months ended June 30, 2017,March 31, 2018, the Company recognized $4.1$4.3 million and $8.6 million and in stock-based compensation expense related to all restricted stock award grants, including those assumed as part of the Bridge acquisition, compared to $3.7 million and $7.5$4.5 million for the three and six months ended June 30, 2016, respectively.March 31, 2017.
In addition, the Company grantspreviously granted shares of restricted stock to certain members of executive management that havehad both performance and service conditions that affect vesting. The performance conditionThere were no such grants made during the three months ended March 31, 2018, however expense is based on achieving an EPS target overstill being recognized for the grants made in 2016 and 2017 as they also have a one-year performancethree-year vesting period. For the three and six months ended June 30, 2017,March 31, 2018, the Company recognized $0.4$0.6 million and $0.8 million, respectively, in stock-based compensation expense related to these performance-based restricted stock grants, compared to $0.3 million and $0.5$0.4 million for the three and six months ended June 30, 2016, respectively.March 31, 2017.
Performance Stock Units
The Company grants members of its executive management committee performance stock units that do not vest unless the Company achieves a specified cumulative EPS target over a three-year performance period. The number of shares issued will vary based on the cumulative EPS target that is achieved. The Company estimates the cost of performance stock units based upon the grant date fair value and expected vesting percentage over the three-year performance period. For the three and six months ended June 30, 2017,March 31, 2018, the Company recognized $1.4$1.6 million and $2.7 million, respectively, in stock-based compensation expense related to these performance stock units, compared to $1.2 million and $2.3$1.3 million for the three and six months ended June 30, 2016, respectively.March 31, 2017.
The three-year performance period for the 20142015 grant ended on December 31, 2016,2017, and the Company's cumulative EPS for the performance period exceeded the level required for a maximum award under the terms of the grant. As a result, executive management committee members were entitled to the maximum award of 202,074 shares, which was 206,050 shares.
Stock Options
The Company's stock option awards consistpaid out in the first quarter of those awards assumed as part of the Bridge acquisition. During the three and six months ended June 30, 2017, the Company recognized $0.2 million and $0.4 millionin compensation expense related to these awards, compared to $0.2 million and $0.4 million for the three and six months ended June 30, 2016, respectively.2018.
Treasury Shares
During the three and six months ended June 30, 2017, theThe Company purchased 180,867 treasury shares of 960 and 202,266, respectively, at a weighted average price of $48.20 and $50.86$59.02 per share respectively. During the three and six months ended June 30, 2016, the Company purchased treasury shares of 2,735 and 293,167, respectively,201,306 at a weighted average price of $35.20 and $31.09$50.88 per share during the three months ended March 31, 2018 and 2017, respectively.

8. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
The following table summarizes the changes in accumulated other comprehensive income (loss) by component, net of tax, for the periods indicated: 
 Three Months Ended June 30, Three Months Ended March 31,
 Unrealized holding gains (losses) on AFS Unrealized holding gains (losses) on SERP Unrealized holding gains (losses) on junior subordinated debt Impairment loss on securities Total Unrealized holding (losses) gains on AFS Unrealized holding gains on SERP Unrealized holding gains (losses) on junior subordinated debt Impairment loss on securities Total
 (in thousands) (in thousands)
Balance, March 31, 2017 $(6,140) $120
 $8,727
 $144
 $2,851
Other comprehensive income before reclassifications 5,662
 37
 (2,089) 
 3,610
Balance, December 31, 2017 $(10,026) $385
 $6,352
 $144
 $(3,145)
Balance, January 1, 2018 (1) (12,556) 469
 7,740
 144
 (4,203)
Other comprehensive (loss) income before reclassifications (38,914) (11) 1,466
 
 (37,459)
Amounts reclassified from accumulated other comprehensive income 
 
 
 
 
Net current-period other comprehensive (loss) income (38,914) (11) 1,466
 
 (37,459)
Balance, March 31, 2018 $(51,470) $458
 $9,206
 $144
 $(41,662)
          
Balance, December 31, 2016 $(14,916) $121
 $9,956
 $144
 $(4,695)
Other comprehensive income (loss) before reclassifications 9,169
 (1) (1,229) 
 7,939
Amounts reclassified from accumulated other comprehensive income 29
 
 
 
 29
 (393) 
 
 
 (393)
Net current-period other comprehensive income (loss) 5,691
 37
 (2,089) 
 3,639
 8,776
 (1) (1,229) 
 7,546
Balance, June 30, 2017 $(449) $157
 $6,638
 $144
 $6,490
          
Balance, March 31, 2016 $20,301
 $96
 $12,792
 $144
 $33,333
Other comprehensive income before reclassifications 12,712
 6
 575
 
 13,293
Amounts reclassified from accumulated other comprehensive income 
 
 
 
 
Net current-period other comprehensive income (loss) 12,712
 6
 575
 
 13,293
Balance, June 30, 2016 $33,013
 $102
 $13,367
 $144
 $46,626
Balance, March 31, 2017 $(6,140) $120
 $8,727
 $144
 $2,851
  Six Months Ended June 30,
  Unrealized holding gains (losses) on AFS Unrealized holding gains (losses) on SERP Unrealized holding gains (losses) on junior subordinated debt Impairment loss on securities Total
  (in thousands)
Balance, December 31, 2016 $(14,916) $121
 $9,956
 $144
 $(4,695)
Other comprehensive income before reclassifications 14,831
 36
 (3,318) 
 11,549
Amounts reclassified from accumulated other comprehensive income (364) 
 
 
 (364)
Net current-period other comprehensive income (loss) 14,467
 36
 (3,318) 
 11,185
Balance, June 30, 2017 $(449) $157
 $6,638
 $144
 $6,490
           
Balance, December 31, 2015 $9,993
 $90
 $12,033
 $144
 $22,260
Other comprehensive income before reclassifications 23,731
 12
 1,334
 
 25,077
Amounts reclassified from accumulated other comprehensive income (711) 
 
 
 (711)
Net current-period other comprehensive income (loss) 23,020
 12
 1,334
 
 24,366
Balance, June 30, 2016 $33,013
 $102
 $13,367
 $144
 $46,626
(1)As adjusted for adoption of ASU 2016-01 and ASU 2018-02, see "Note 1. Summary of Significant Accounting Policies " for further discussion.
The following table presents reclassifications out of accumulated other comprehensive income:income (loss): 
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
Income Statement Classification 2017 2016 2017 2016 2018 2017
 (in thousands) (in thousands)
(Loss) gain on sales of investment securities, net $(47) $
 $588
 $1,001
Income tax benefit (expense) 18
 
 (224) (290)
Gain on sales of investment securities, net $
 $635
Income tax expense 
 (242)
Net of tax $(29) $
 $364
 $711
 $
 $393

9. DERIVATIVES AND HEDGING ACTIVITIES
The Company is a party to various derivative instruments. Derivative instruments are contracts between two or more parties that have a notional amount and an underlying variable, require a small or no initial investment, and allow for the net settlement of positions. A derivative’s notional amount serves as the basis for the payment provision of the contract and takes the form of units, such as shares or dollars. A derivative’s underlying variable is a specified interest rate, security price, commodity price, foreign exchange rate, index, or other variable. The interaction between the notional amount and the underlying variable determines the number of units to be exchanged between the parties and influences the fair value of the derivative contract.
The primary type of derivatives that the Company uses are interest rate swaps. Generally, these instruments are used to help manage the Company's exposure to interest rate risk and meet client financing and hedging needs.
Derivatives are recorded at fair value in the Consolidated Balance Sheets, after taking into account the effects of bilateral collateral and master netting agreements. These agreements allow the Company to settle all derivative contracts held with the same counterparty on a net basis, and to offset net derivative positions with related cash collateral, where applicable.
As of June 30, 2017,March 31, 2018, December 31, 2016,2017, and June 30, 2016,March 31, 2017, the Company does not have any significant outstanding cash flow hedges or free-standing derivatives.

Derivatives Designated in Hedge Relationships
The Company utilizes derivatives that have been designated as part of a hedge relationship in accordance with the applicable accounting guidance to minimize the exposure to changes in benchmark interest rates and volatility of net interest income and EVE to interest rate fluctuations. The primary derivative instruments used to manage interest rate risk are interest rate swaps, which convert the contractual interest rate index of agreed-upon amounts of assets and liabilities (i.e., notional amounts) to another interest rate index.
The Company has entered into pay fixed/receive variable interest rate swaps designated as fair value hedges of certain fixed rate loans. As a result, the Company receives variable-rate interest payments in exchange for making fixed-rate payments over the lives of the contracts without exchanging the notional amounts.
The Company has also entered into receive fixed/pay variable/receive fixedvariable interest rate swaps, designated as fair value hedges on its fixed rate subordinated debt offerings. As a result, the Company is paying a floating rate of three monththree-month LIBOR plus 3.16% and is receiving semi-annual fixed payments of 5.00% to match the payments on the $150.0 million subordinated debt. For the fair value hedge on the Company'sParent's $175.0 million subordinated debentures issued on June 16, 2016, the Company is paying a floating rate of three monththree-month LIBOR plus 3.25% and is receiving quarterly fixed payments of 6.25% to match the payments on the debt.
Derivatives Not Designated in Hedge Relationships

Management also enters into certain foreign exchange derivative contracts which are not designated as accounting hedges. These derivative contracts include spot, forward and forward window contracts. The purpose of these derivative contracts is to mitigate foreign currency risk on transactions entered into, or on behalf of customers. Contracts with customers, along with the related derivative trades the Company places, are both remeasured at fair value, and are referred to as economic hedges since they economically offset the Company's exposure. For the three months ended March 31, 2018 and 2017, changes in the fair value related to these derivative contracts totaled $0.5 million and $1.0 million, respectively, and are included in Other non-interest income in the Consolidated Income Statements.

As of March 31, 2018 and December 31, 2017, the following amounts are reflected in the Consolidated Balance Sheet related to cumulative basis adjustments for fair value hedges:

  March 31, 2018 December 31, 2017
  Carrying Value of Hedged Assets/(Liabilities) Cumulative Amount of the Fair Value Hedging Adjustment (1) Carrying Value of Hedged Assets/(Liabilities) Cumulative Amount of the Fair Value Hedging Adjustment (1)
  (in thousands)
Loans - HFI, net of deferred loan fees and costs $671,363
 $18,063
 $699,452
 $41,919
Qualifying debt (297,506) 21,193
 (308,608) 9,959
(1)Included in the carrying value of the hedged assets/(liabilities).

For the Company's derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings in the same line item as the offsetting loss or gain on the related interest rate swaps. For loans, the gain or loss on the hedged item is included in interest income and for subordinated debt, the gain or loss on the hedged item is included in interest expense.

Fair Values, Volume of Activity, and Gain/Loss Information Related to Derivative Instruments
The following table summarizes the fair values of the Company's derivative instruments on a gross and net basis as of June 30, 2017,March 31, 2018, December 31, 2016,2017, and June 30, 2016.March 31, 2017. The change in the notional amounts of these derivatives from June 30, 2016March 31, 2017 to June 30, 2017March 31, 2018 indicates the volume of the Company's derivative transaction activity during these periods. The derivative asset and liability balances are presented on a gross basis, prior to the application of bilateral collateral and master netting agreements. Total derivative assets and liabilities are adjusted to take into account the impact of legally enforceable master netting agreements that allow the Company to settle all derivative contracts with the same counterparty on a net basis and to offset the net derivative position with the related collateral. Where master netting agreements are not in effect or are not enforceable under bankruptcy laws, the Company does not adjust those derivative amounts with counterparties. The fair value of derivative contracts, after taking into account the effects of master netting agreements, is included in other assets or other liabilities in the Consolidated Balance Sheets, as indicated in the following table:
June 30, 2017 December 31, 2016 June 30, 2016March 31, 2018 December 31, 2017 March 31, 2017
  Fair Value   Fair Value   Fair Value  Fair Value   Fair Value   Fair Value
Notional
Amount
 Derivative Assets Derivative Liabilities Notional
Amount
 Derivative Assets Derivative Liabilities Notional
Amount
 Derivative Assets Derivative LiabilitiesNotional
Amount
 Derivative Assets Derivative Liabilities Notional
Amount
 Derivative Assets Derivative Liabilities Notional
Amount
 Derivative Assets Derivative Liabilities
(in thousands)(in thousands)
Derivatives designated as hedging instruments:Derivatives designated as hedging instruments:              Derivatives designated as hedging instruments:              
Fair value hedges                                  
Interest rate swaps$1,032,586
 $3,793
 $64,153
 $993,485
 $4,220
 $65,749
 $970,382
 $7,757
 $107,097
$989,379
 $3,533
 $42,789
 $993,432
 $1,703
 $53,581
 $1,035,151
 $1,985
 $59,136
Total1,032,586
 3,793
 64,153
 993,485
 4,220
 65,749
 970,382
 7,757
 107,097
989,379
 3,533
 42,789
 993,432
 1,703
 53,581
 1,035,151
 1,985
 59,136
Netting adjustments (1)
 1,447
 1,447
 
 1,869
 1,869
 
 
 

 3,493
 3,493
 
 896
 896
 
 1,947
 1,947
Net derivatives in the balance sheet$1,032,586
 $2,346
 $62,706
 $993,485
 $2,351
 $63,880
 $970,382
 $7,757
 $107,097
$989,379
 $40
 $39,296
 $993,432
 $807
 $52,685
 $1,035,151
 $38
 $57,189
                 
Derivatives not designated as hedging instruments:Derivatives not designated as hedging instruments:              
Foreign currency contracts (2)$90,855
 $684
 $394
 $85,335
 $1,232
 $983
 $68,298
 $327
 $111
Interest rate swaps36,840
 1,170
 1,170
 36,969
 776
 776
 38,192
 796
 796
Total$127,695
 $1,854
 $1,564
 $122,304
 $2,008
 $1,759
 $106,490
 $1,123
 $907
(1)Netting adjustments represent the amounts recorded to convert the Company's derivative balances from a gross basis to a net basis in accordance with the applicable accounting guidance.
Fair value hedges
An assessment of effectiveness is performed at initiation of a hedge and on a quarterly basis thereafter. All of the Company's fair value hedges remained “highly effective” as of June 30, 2017, December 31, 2016, and June 30, 2016.
The following table summarizes the gains (losses) on fair value hedges for the three and six months ended June 30, 2017 and 2016, all of which are recorded in non-interest income.
 Three Months Ended June 30, Six Months Ended June 30,
 2017 2016 2017 2016
 (in thousands)
Hedge of Fixed Rate Loans (1)
       
Gain (loss) on "pay fixed" swap$(8,185) $(18,115) $(616) $(42,312)
Gain (loss) on receive fixed rate loans8,195
 18,122
 642
 42,319
Net ineffectiveness$10
 $7
 $26
 $7
Hedge of Fixed Rate Subordinated Debt Issuances (1)
       
Gain (loss) on "receive fixed" swap$4,977
 $3,024
 $1,786
 $4,189
Gain (loss) on subordinated debt(4,977) (3,024) (1,786) (4,189)
Net ineffectiveness$
 $
 $
 $
(1)(2)The fair value of derivatives contracts are carried as other assets and other liabilities in the Consolidated Balance Sheets. The effective portion of hedging gains (losses) is recorded as basisPrior period derivative asset / liability netting adjustments have been made to the underlying hedged asset or liability. Gains and losses on both the hedging derivative and hedged item are recorded through non-interest income with a resulting net income impact for the amount of ineffectiveness.conform to current presentation.

Counterparty Credit Risk
Like other financial instruments, derivatives contain an element of credit risk. This risk is measured as the expected positive replacement value of the contracts. Management generally enters into bilateral collateral and master netting agreements that provide for the net settlement of all contracts with the same counterparty. Additionally, management monitors counterparty credit risk exposure on each contract to determine appropriate limits on the Company's total credit exposure across all product types. In general, the Company has a zero credit threshold with regard to derivative exposure with counterparties. Management reviews the Company's collateral positions on a daily basis and exchanges collateral with counterparties in accordance with standard ISDA documentation and other related agreements. The Company generally holds collateral in the form of cash deposits or highly rated securities issued by the U.S. Treasury or government-sponsored enterprises, such as GNMA, FNMA, and FHLMC. The total collateral netted against net derivative liabilities totaled $64.2$40.1 million at June 30, 2017, $65.7March 31, 2018, $53.6 million at December 31, 2016,2017, and $107.1$59.1 million at June 30, 2016.March 31, 2017.

The following table summarizes the Company's largest exposure to an individual counterparty at the dates indicated:
 June 30, 2017 December 31, 2016 June 30, 2016 March 31, 2018 December 31, 2017 March 31, 2017
 (in thousands) (in thousands)
Largest gross exposure (derivative asset) to an individual counterparty $2,347
 $2,351
 $7,556
 $2,515
 $893
 $3,569
Collateral posted by this counterparty 2,560
 1,691
 7,680
 
 
 4,680
Derivative liability with this counterparty 
 
 
 20,624
 40,340
 
Collateral pledged to this counterparty 
 
 
 29,719
 60,476
 1,340
Net exposure after netting adjustments and collateral $
 $660
 $
 $
 $
 $229
Credit Risk Contingent Features
Management has entered into certain derivative contracts that require the Company to post collateral to the counterparties when these contracts are in a net liability position. Conversely, the counterparties may be required to post collateral when these contracts are in a net asset position. The amount of collateral to be posted is based on the amount of the net liability and exposure thresholds. As of June 30, 2017,March 31, 2018, December 31, 2016,2017, and June 30, 2016March 31, 2017 the aggregate fair value of all derivative contracts with credit risk contingent features (i.e., those containing collateral posting provisions) held by the Company that were in a net liability position totaled $62.7$39.3 million, $63.9$52.7 million, and $107.1$57.2 million, respectively. As of June 30, 2017,March 31, 2018, the Company was in an over-collateralized net position of $17.9$12.1 million after considering $82.1$52.2 million of collateral held in the form of cash and securities. As of December 31, 20162017 and June 30, 2016,March 31, 2017, the Company was in an over-collateralized position of $24.3$25.0 million and $28.7$11.7 million, respectively.
10. EARNINGS PER SHARE
Diluted EPS is based on the weighted average outstanding common shares during each period, including common stock equivalents. Basic EPS is based on the weighted average outstanding common shares during the period.
The following table presents the calculation of basic and diluted EPS: 
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 2017 2016 2018 2017
 (in thousands, except per share amounts) (in thousands, except per share amounts)
Weighted average shares - basic 104,162
 102,688
 104,075
 102,294
 104,530
 103,987
Dilutive effect of stock awards 883
 784
 866
 713
 794
 849
Weighted average shares - diluted 105,045
 103,472
 104,941
 103,007
 105,324
 104,836
Net income $79,971
 $61,614
 $153,328
 $122,946
Net income available to common stockholders $100,900
 $73,342
Earnings per share - basic 0.77
 0.60
 1.47
 1.20
 0.97
 0.71
Earnings per share - diluted 0.76
 0.60
 1.46
 1.19
 0.96
 0.70
The Company had no anti-dilutive stock options outstanding at each of the periods ended June 30, 2017March 31, 2018 and 2016.2017.

11. INCOME TAXES  
The effective tax rate was 28.55%17.10% and 29.94%25.03% for the three months ended June 30,March 31, 2018 and 2017, and 2016, respectively. ForThe decrease in the six months ended June 30, 2017 and 2016, the Company's effective tax rate was 26.91% and 27.16%, respectively.is due primarily to the decrease in the Federal statutory rate for 2018.
As of June 30, 2017,March 31, 2018, the net deferred tax asset was $87.7$27.4 million, a decreasean increase of $7.5$21.6 million from December 31, 2016.2017. This overall decreaseincrease in the net deferred tax asset was primarily the result of increasesrecognizing previously deferred income and decreases in the fair market value of AFS securities.
Although realization is not assured, the Company believes that the realization of the recognized deferred tax asset of $87.7$27.4 million at June 30, 2017March 31, 2018 is more-likely-than-not based on expectations as to future taxable income and based on available tax planning strategies within the meaning of ASC 740, Income Taxes,, that could be implemented if necessary to prevent a carryover from expiring.
At June 30, 2017March 31, 2018 and December 31, 2016,2017, the Company had no deferred tax valuation allowance.
TheAs of March 31, 2018, the Company’s gross federal NOL carryovers, a portion of which are subject to limitations under Section 382 of the IRC, totaled approximately $135.6 million for which a deferred tax asset related toof $24.0 million has been recorded reflecting the expected benefit of these federal andNOL carryovers. The Company also has varying gross amounts of state NOL carryovers outstanding at each ofwith California and Arizona being the periods ended June 30, 2017most significant. The ending gross California and December 31, 2016 available to reduce the tax liability in future yearsArizona NOL carryovers totaled $8.9approximately $19.1 million and $9.0$13.3 million, respectively. These tax benefits relate entirely to federal NOL carryovers (subject to an annual limitation imposed by IRC Section 382). The Company’s ability to use federal NOL carryovers, as well as its ability to use certain future tax deductions called NUBILs associated with the Company's acquisitions is subject to annual limitations. In management’s opinion, it is more-likely-than-not that the results of future operations will generate sufficient taxable income to realize all of theA deferred tax benefits relatedasset of $2.8 million has been recorded to thesereflect the expected benefit of all state NOL carryovers and NUBILs.carryovers.
Investments in LIHTC
The Company invests in LIHTC funds that are designed to generate a return primarily through the realization of federal tax credits.
Investments in LIHTC and unfunded LIHTC obligations are included as part of other assets and other liabilities, respectively, in the Consolidated Balance Sheets and total $234.7$288.9 million and $133.6$167.9 million, respectively, as of June 30, 2017,March 31, 2018, compared to $187.4$267.0 million and $84.4$151.3 million as of December 31, 2016.2017. For the three months ended June 30,March 31, 2018 and 2017, and 2016, $6.9$8.1 million and $3.8$5.9 million, respectively, of amortization related to LIHTC investments was recognized as a component of income tax expense. For the six months ended June 30, 2017 and 2016, $12.7 million and $8.2 million of amortization related to LIHTC investments was recognized as a component of income tax expense, respectively.
12. COMMITMENTS AND CONTINGENCIES
Unfunded Commitments and Letters of Credit
The Company is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. They involve, to varying degrees, elements of credit risk in excess of amounts recognized in the Consolidated Balance Sheets.
Lines of credit are obligations to lend money to a borrower. Credit risk arises when the borrower's current financial condition may indicate less ability to pay than when the commitment was originally made. In the case of standby letters of credit, the risk arises from the potential failure of the customer to perform according to the terms of a contract. In such a situation, the third party might draw on the standby letter of credit to pay for completion of the contract and the Company would look to its customer to repay these funds with interest. To minimize the risk, the Company uses the same credit policies in making commitments and conditional obligations as it would for a loan to that customer.
Standby letters of credit and financial guarantees are commitments issued by the Company to guarantee the performance of a customer to a third party in borrowing arrangements. The Company generally has recourse to recover from the customer any amounts paid under the guarantees. Typically, letters of credit issued have expiration dates within one year.

A summary of the contractual amounts for unfunded commitments and letters of credit are as follows: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Commitments to extend credit, including unsecured loan commitments of $329,903 at June 30, 2017 and $360,840 at December 31, 2016 $5,181,532
 $4,428,495
Commitments to extend credit, including unsecured loan commitments of $437,437 at March 31, 2018 and $364,638 at December 31, 2017 $6,500,031
 $5,851,158
Credit card commitments and financial guarantees 134,637
 115,536
 186,613
 153,752
Standby letters of credit, including unsecured letters of credit of $10,859 at June 30, 2017 and $6,431 at December 31, 2016 111,124
 78,576
Standby letters of credit, including unsecured letters of credit of $12,148 at March 31, 2018 and $11,664 at December 31, 2017 181,068
 161,966
Total $5,427,293
 $4,622,607
 $6,867,712
 $6,166,876
Commitments to extend credit are agreements to lend to a customer provided that there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Company enters into credit arrangements that generally provide for the termination of advances in the event of a covenant violation or other event of default. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the party. The commitments are collateralized by the same types of assets used as loan collateral.
The Company has exposure to credit losses from unfunded commitments and letters of credit. As funds have not been disbursed on these commitments, they are not reported as loans outstanding. Credit losses related to these commitments are included in other liabilities as a separate loss contingency and are not included in the allowance for credit losses reported in "Note 3. Loans, Leases and Allowance for Credit Losses" of these Unaudited Consolidated Financial Statements. This loss contingency for unfunded loan commitments and letters of credit was $5.9$7.2 million and $7.0$6.2 million as of June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively. Changes to this liability are adjusted through non-interest expense.other expense in the Consolidated Income Statement.
Concentrations of Lending Activities
The Company’s lending activities are driven in large part by the customers served in the market areas where the Company has branch offices in the states of Arizona, Nevada, and California. Despite the geographic concentration of lending activities, the Company does not have a single external customer from which it derives 10% or more of its revenues. The Company monitors concentrations within four broad categories: geography, industry, product, and collateral. The Company's loan portfolio includes significant credit exposure to the CRE market. As of June 30, 2017March 31, 2018 and December 31, 2016,2017, CRE related loans accounted for approximately 52% and 53% of total loans, respectively.loans. Substantially all of these loans are secured by first liens with an initial loan to value ratio of generally not more than 75%. Approximately 37% and 36% of these CRE loans, excluding construction and land loans, were owner-occupied at each of the periods ended June 30, 2017March 31, 2018 and December 31, 2016.2017, respectively.
Contingencies
The Company is involved in various lawsuits of a routine nature that are being handled and defended in the ordinary course of the Company’s business. Expenses are being incurred in connection with these lawsuits, but in the opinion of management, based in part on consultation with outside legal counsel, the resolution of these lawsuits and associated defense costs will not have a material impact on the Company’s financial position, results of operations, or cash flows.
Lease Commitments
The Company leases the majority of its office locations and many of these leases contain multiple renewal options and provisions for increased rents. Total rent expense of $2.7$2.5 million and $2.8$2.6 million for the three months ended June 30,March 31, 2018 and 2017, and 2016, respectively, was included in occupancy expense. For the six months ended June 30, 2017 and 2016, total rentOccupancy expense was $5.4 million and $5.3 million, respectively.in these Unaudited Consolidated Financial Statements.

13. FAIR VALUE ACCOUNTING
The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach, and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability. ASC 825 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy under ASC 825 are described in "Note 1. Summary of Significant Accounting Policies" of these Notes to Unaudited Consolidated Financial Statements.
In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developedinternally-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 things, 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, and 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 in the fair value hierarchy are recognized as of the end of the month following the event or change in circumstances that caused the transfer.
Under ASC 825, the Company elected the FVO treatment for junior subordinated debt heldissued by WAL. This election is irrevocable and results in the recognition of unrealized gains and losses on these items at each reporting date. Due to the Company's election to early adopt an element of ASU 2016-01, effective January 1, 2015, theseThese unrealized gains and losses are recognized as part of other comprehensive income rather than earnings. The Company did not elect FVO treatment for the junior subordinated debt assumed in the Bridge Capital Holdings acquisition in 2015.acquisition.
All securities for which the fair value measurement option had been elected are included in a separate line item in the Consolidated Balance Sheets as securities measured at fair value. DuringFor the three months ended June 30,March 31, 2018 and 2017, gains and losses from fair value changes on junior subordinated debt were as follows:
  Changes in Fair Values for Items Measured at Fair Value
Pursuant to Election of the Fair Value Option
  Unrealized Gain/(Loss) on Assets and Liabilities Measured at Fair Value, Net Interest Income on Securities Interest Expense on Junior Subordinated Debt Total Changes Included in Current-Period Earnings Total Changes Included in OCI
  (in thousands)
Three Months Ended March 31, 2018        
Junior subordinated debt $1,944
 $
 $904
 $904
 $1,466
Total $1,944
 $
 $904
 $904
 $1,466
Three Months Ended March 31, 2017          
Securities measured at fair value $(1) $7
 $
 $6
 $
Junior subordinated debt (1,986) 
 (749) (749) (1,229)
Total $(1,987) $7
 $(749) $(743) $(1,229)
During the year ended December 31, 2017, the Company sold all of its investment securities measured at fair value. No significant gain or loss was recognized upon sale of these securities.

For the three and six months ended June 30, 2017 and 2016, gains and losses from fair value changes on securities and junior subordinated debt were as follows:
  Changes in Fair Values for Items Measured at Fair Value
Pursuant to Election of the Fair Value Option
  Unrealized Gain/(Loss) on Assets and Liabilities Measured at Fair Value, Net Interest Income on Securities Interest Expense on Junior Subordinated Debt Total Changes Included in Current-Period Earnings Total Changes Included in OCI
  (in thousands)
Three Months Ended June 30, 2017          
Securities measured at fair value $
 $2
 $
 $2
 $
Junior subordinated debt (3,376) 
 (791) (791) (2,089)
Total $(3,376) $2
 $(791) $(789) $(2,089)
Six Months Ended June 30, 2017          
Securities measured at fair value $
 $9
 $
 $9
 $
Junior subordinated debt (5,362) 
 (1,540) (1,540) (3,318)
Total $(5,362) $9
 $(1,540) $(1,531) $(3,318)
Three Months Ended June 30, 2016          
Securities measured at fair value $(1) $11
 $
 $10
 $
Junior subordinated debt 1,006
 
 693
 693
 575
Total $1,005
 $11
 $693
 $703
 $575
Six Months Ended June 30, 2016          
Securities measured at fair value $(6) $22
 $
 $16
 $
Junior subordinated debt 2,218
 
 1,373
 1,373
 1,334
Total $2,212
 $22
 $1,373
 $1,389
 $1,334
Interest income on securities measured at fair value is accounted for similarly to those classified as AFS. Any premiums or discounts are recognized in interest income over the term of the securities. Interest expense on junior subordinated debt is also determined under a constant yield calculation.
Fair value on a recurring basis
Financial assets and financial liabilities measured at fair value on a recurring basis include the following:
Securities measured at fair value: All of the Company’s securities measured at fair value, which consist of MBS, are reported at fair value utilizing Level 2 inputs in the same manner as described below for AFS securities.
AFS securities: Preferred stock and CRA investments and certain corporate debt securities are reported at fair value utilizing Level 1 inputs. Other securities classified as AFS 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 bond’s terms and conditions, among other things.
Historically, the Company has estimated the fair value of its CDO securities utilizing Level 3 inputs, which include pricing indications from comparable securities. During the year ended December 31, 2016, these securities were transferred from Level 3 to Level 2 as a result of an increase in the availability and reliability of the observable inputs utilized in the securities' fair value measurement.
Independent pricing service: The Company's independent pricing service provides pricing information on the majority of the Company's Level 1 and 2 securities. Management independently evaluates the fair value measurements received from the Company's third party pricing service through multiple review steps. First, management reviews what has transpired in the marketplace with respect to interest rates, credit spreads, volatility, and mortgage rates, among other things, and develops an expectation of changes to the securities' valuations from the previous quarter. Then, management obtains market values from additional sources. The pricing service provides management with observable market data including interest rate curves and mortgage prepayment speed grids, as well as dealer quote sheets, new bond offering sheets, and historical trade documentation. Management reviews the assumptions and decides whether they are reasonable. Management may compare interest rates, credit spreads, and prepayments speeds used as part of the assumptions to those that management believes are reasonable. Management may price securities using the provided assumptions to determine whether they can develop similar prices on like

securities. Any discrepancies between management’s review and the prices provided by the vendor are discussed with the vendor and the Company’s other valuation advisors. Lastly, management selects a sample of investment securities and compares the values provided by its primary third party pricing service to the market values obtained from secondary sources and evaluates those with notable variances.
Interest rate swaps: Interest rate swaps are reported at fair value utilizing Level 2 inputs. The Company obtains dealer quotations to value its interest rate swaps.
Junior subordinated debt: The Company estimates the fair value of its junior subordinated debt using a discounted cash flow model which incorporates the effect of the Company’s own credit risk in the fair value of the liabilities (Level 3). The Company’s cash flow assumptions are based on contractual cash flows as the Company anticipates that it will pay the debt according to its contractual terms.
As of June 30, 2017,March 31, 2018, the Company estimates the discount rate at 5.21%6.65%, which represents an implied credit spread of 3.91%4.34% plus three-month LIBOR (1.30%(2.31%). As of December 31, 2016,2017, the Company estimated the discount rate at 5.66%5.61%, which was a 4.66%3.92% credit spread plus three-month LIBOR (1.00%(1.69%).

The fair value of assets and liabilities measured at fair value on a recurring basis was determined using the following inputs as of the periods presented: 
 Fair Value Measurements at the End of the Reporting Period Using: Fair Value Measurements at the End of the Reporting Period Using:
 Quoted Prices in Active Markets for Identical Assets
(Level 1)
 Significant Other Observable Inputs
(Level 2)
 Significant Unobservable Inputs
(Level 3)
 Fair Value Quoted Prices in Active Markets for Identical Assets
(Level 1)
 Significant Other Observable Inputs
(Level 2)
 Significant Unobservable Inputs
(Level 3)
 Fair Value
 (in thousands) (in thousands)
June 30, 2017        
March 31, 2018        
Assets:                
Available-for-sale                
CDO $
 $15,553
 $
 $15,553
 $
 $19,453
 $
 $19,453
Commercial MBS issued by GSEs 
 115,327
 
 115,327
 
 104,973
 
 104,973
Corporate debt securities 
 63,922
 
 63,922
 
 101,676
 
 101,676
CRA investments 49,482
 
 
 49,482
 50,846
 
 
 50,846
Preferred stock 97,506
 
 
 97,506
 93,318
 
 
 93,318
Private label residential MBS 
 680,248
 
 680,248
 
 818,996
 
 818,996
Residential MBS issued by GSEs 
 1,555,137
 
 1,555,137
 
 1,626,899
 
 1,626,899
Tax-exempt 
 404,189
 
 404,189
 
 497,921
 
 497,921
Trust preferred securities 
 29,405
 
 29,405
 
 28,617
 
 28,617
U.S. government sponsored agency securities 
 71,391
 
 71,391
 
 60,290
 
 60,290
U.S. treasury securities 
 2,498
 
 2,498
 
 2,473
 
 2,473
Total AFS securities $146,988
 $2,937,670
 $
 $3,084,658
 $144,164
 $3,261,298
 $
 $3,405,462
Loans - HFS $
 $16,736
 $
 $16,736
Derivative assets (1) 
 3,793
 
 3,793
 $
 $5,387
 $
 $5,387
Liabilities:                
Junior subordinated debt (2) $
 $
 $55,772
 $55,772
 $
 $
 $54,290
 $54,290
Derivative liabilities (1) 
 64,153
 
 64,153
 
 44,353
 
 44,353
(1)Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans is increased by $49,057$18,063 and the net carrying value of subordinated debt is decreased by $10,540$21,193 as of June 30, 2017,March 31, 2018, which relates to the effective portionfair value of the hedges put in place to mitigate against fluctuations in interest rates.
(2)Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.


 Fair Value Measurements at the End of the Reporting Period Using: Fair Value Measurements at the End of the Reporting Period Using:
 
Quoted Prices in Active Markets for Identical Assets
(Level 1)
 
Significant Other Observable Inputs
(Level 2)
 
Significant Unobservable Inputs
(Level 3)
 
Fair
Value
 Quoted Prices in Active Markets for Identical Assets
(Level 1)
 Significant Other Observable Inputs
(Level 2)
 Significant Unobservable Inputs
(Level 3)
 Fair Value
 (in thousands) (in thousands)
December 31, 2016        
December 31, 2017        
Assets:                
Measured at fair value        
Residential MBS issued by GSEs $
 $1,053
 $
 $1,053
Available-for-sale                
CDO 
 13,490
 
 13,490
 $
 $21,857
 $
 $21,857
Commercial MBS issued by GSEs 
 117,792
 
 117,792
 
 109,077
 
 109,077
Corporate debt securities 20,000
 44,144
 
 64,144
 
 103,483
 
 103,483
CRA investments 37,113
 
 
 37,113
 50,616
 
 
 50,616
Preferred stock 94,662
 
 
 94,662
 53,196
 
 
 53,196
Private label residential MBS 
 433,685
 
 433,685
 
 868,524
 
 868,524
Residential MBS issued by GSEs 
 1,355,205
 
 1,355,205
 
 1,689,295
 
 1,689,295
Tax-exempt 
 408,233
 
 408,233
 
 510,910
 
 510,910
Trust preferred securities 
 26,532
 
 26,532
 
 28,617
 
 28,617
U.S. government sponsored agency securities 
 56,022
 
 56,022
 
 61,462
 
 61,462
U.S. treasury securities 
 2,502
 
 2,502
 
 2,482
 
 2,482
Total AFS securities $151,775
 $2,457,605
 $
 $2,609,380
 $103,812
 $3,395,707
 $
 $3,499,519
Loans - HFS $
 $18,909
 $
 $18,909
Derivative assets (1) 
 4,220
 
 4,220
 $
 $3,711
 $
 $3,711
Liabilities:                
Junior subordinated debt $
 $
 $50,410
 $50,410
Junior subordinated debt (2) $
 $
 $56,234
 $56,234
Derivative liabilities (1) 
 65,749
 
 65,749
 
 55,340
 
 55,340
(1)Derivative assets and liabilities relate to interest rate swaps, see "Note 9. Derivatives and Hedging Activities." In addition, the carrying value of loans is increased by $$48,161$41,919 and the net carrying value of subordinated debt is decreased by$12,325asby $9,959 as of December 31, 2016,2017, which relates to the effective portionfair value of the hedges put in place to mitigate against fluctuations in interest rates.
(2)Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.
For the three and six months ended June 30,March 31, 2018 and 2017, and 2016, the change in Level 3 assets and liabilities measured at fair value on a recurring basis was as follows: 
 Junior Subordinated Debt Junior Subordinated Debt
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 2017 2016 2018 2017
 (in thousands) (in thousands)
Beginning balance $52,396
 $45,716
 $50,410
 $46,928
 $(56,234) $(50,410)
Transfers into Level 3 
 
 
 
 
 
Total gains (losses) for the period            
Included in earnings 
 
 
 
Included in other comprehensive income 3,376
 (1,006) 5,362
 (2,218) 1,944
 (1,986)
Ending balance $55,772
 $44,710
 $55,772
 $44,710
 $(54,290) $(52,396)
 

  CDO Securities
  Three Months Ended June 30, Six Months Ended June 30,
  2017 2016 2017 2016
  (in thousands)
Beginning balance $
 $9,076
 $
 $10,060
Transfers into Level 3 
 
 
 
Total gains (losses) for the period        
Included in other comprehensive income 
 1,107
 
 123
Ending balance $
 $10,183
 $
 $10,183
The Company transferred all CDO securities from Level 3 to Level 2 during the year ended December 31, 2016 as a result of an increase in the availability and reliability of the observable inputs utilized in the securities' fair value measurement. The Company recognized this transfer between levels on October 31, 2016, in accordance with its policy to recognize transfers between levels in the fair value hierarchy as of the end of the month following the event or change in circumstance that caused the transfer.
For Level 3 assets and liabilities measured at fair value on a recurring basis as of June 30, 2017March 31, 2018 and December 31, 2016,2017, the significant unobservable inputs used in the fair value measurements were as follows: 
  June 30, 2017 Valuation Technique Significant Unobservable Inputs Input Value
  (in thousands)      
Junior subordinated debt $55,772
 Discounted cash flow Implied credit rating of the Company 5.21%
  March 31, 2018 Valuation Technique Significant Unobservable Inputs Input Value
  (in thousands)      
Junior subordinated debt $54,290
 Discounted cash flow Implied credit rating of the Company 6.65%
 
  December 31, 2016 Valuation Technique Significant Unobservable Inputs Input Value
  (in thousands)      
Junior subordinated debt $50,410
 Discounted cash flow Implied credit rating of the Company 5.66%
  December 31, 2017 Valuation Technique Significant Unobservable Inputs Input Value
  (in thousands)      
Junior subordinated debt $56,234
 Discounted cash flow Implied credit rating of the Company 5.61%

The significant unobservable inputs used in the fair value measurement of the Company’s junior subordinated debt as of June 30, 2017March 31, 2018 and December 31, 20162017 was the implied credit risk for the Company, calculated as the difference between the 20-year 'BB' rated financial index over the corresponding swap index.
Fair value on a nonrecurring basis
Certain assets are measured at fair value on a nonrecurring basis. That is, the assets are not measured at fair value on an ongoing basis, but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following table presents such assets carried on the balance sheetBalance Sheet by caption and by level within the ASC 825 hierarchy:
 Fair Value Measurements at the End of the Reporting Period Using Fair Value Measurements at the End of the Reporting Period Using
 Total 
Quoted Prices in Active Markets for Identical Assets
(Level 1)
 
Active Markets for Similar Assets
(Level 2)
 
Unobservable Inputs
(Level 3)
 Total 
Quoted Prices in Active Markets for Identical Assets
(Level 1)
 
Active Markets for Similar Assets
(Level 2)
 
Unobservable Inputs
(Level 3)
 (in thousands) (in thousands)
As of June 30, 2017:        
As of March 31, 2018;        
Impaired loans with specific valuation allowance $4,417
 $
 $
 $4,417
 $4,036
 $
 $
 $4,036
Impaired loans without specific valuation allowance (1) 76,575
 
 
 76,575
 63,639
 
 
 63,639
Other assets acquired through foreclosure 30,988
 
 
 30,988
 30,194
 
 
 30,194
As of December 31, 2016:        
As of December 31, 2017:        
Impaired loans with specific valuation allowance $6,670
 $
 $
 $6,670
 $13,709
 $
 $
 $13,709
Impaired loans without specific valuation allowance (1) 60,738
 
 
 60,738
 63,607
 
 
 63,607
Other assets acquired through foreclosure 47,815
 
 
 47,815
 28,540
 
 
 28,540
(1)Net of loan balances with charge-offs of $20.8$24.4 million and $27.6$15.6 million as of June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.

For Level 3 assets measured at fair value on a nonrecurring basis as of June 30, 2017March 31, 2018 and December 31, 2016,2017, the significant unobservable inputs used in the fair value measurements were as follows:
June 30, 2017 Valuation Technique(s) Significant Unobservable Inputs RangeMarch 31, 2018 Valuation Technique(s) Significant Unobservable Inputs Range
(in thousands) (in thousands) 
Impaired loans$80,992
 Collateral method Third party appraisal or valuation Costs to sell 4.0% to 10.0%$67,675
 Collateral method Third party appraisal Costs to sell 4.0% to 10.0%
Discounted cash flow method Discount rate Contractual loan rate 4.0% to 7.0% Discounted cash flow method Discount rate Contractual loan rate 4.0% to 7.0%
 Scheduled cash collections Probability of default 0% to 20.0%  Scheduled cash collections Probability of default 0% to 20.0%
 Proceeds from non-real estate collateral Loss given default 0% to 70.0%  Proceeds from non-real estate collateral Loss given default 0% to 70.0%
Other assets acquired through foreclosure30,988
 Collateral method Third party appraisal Costs to sell 4.0% to 10.0%30,194
 Collateral method Third party appraisal Costs to sell 4.0% to 10.0%
December 31, 2016 Valuation Technique(s) Significant Unobservable Inputs RangeDecember 31, 2017 Valuation Technique(s) Significant Unobservable Inputs Range
(in thousands) (in thousands) 
Impaired loans$67,408
 Collateral method Third party appraisal Costs to sell 4.0% to 10.0%$77,316
 Collateral method Third party appraisal Costs to sell 4.0% to 10.0%
Discounted cash flow method Discount rate Contractual loan rate 4.0% to 7.0% Discounted cash flow method Discount rate Contractual loan rate 4.0% to 7.0%
 Scheduled cash collections Probability of default
 0% to 20.0%  Scheduled cash collections Probability of default 0% to 20.0%
 Proceeds from non-real estate collateral Loss given default 0% to 70.0%  Proceeds from non-real estate collateral Loss given default 0% to 70.0%
Other assets acquired through foreclosure47,815
 Collateral method Third party appraisal Costs to sell 4.0% to 10.0%28,540
 Collateral method Third party appraisal Costs to sell 4.0% to 10.0%
Impaired loans: The specific reserves for collateral dependent impaired loans are based on collateral value, net of estimated disposition costs and other identified quantitative inputs. Collateral value is determined based on independent third-party appraisals or internally-developed discounted cash flow analyses. Appraisals may utilize a single valuation approach or a combination of approaches, including comparable sales and the income approach. Fair value is determined, where possible, using market prices derived from an appraisal or evaluation, which are considered to be Level 2. However, certain assumptions and unobservable inputs are often used by the appraiser, therefore qualifying the assets as Level 3 in the fair value hierarchy. In addition, when adjustments are made to an appraised value to reflect various factors such as the age of the appraisal or known changes in the market or the collateral, such valuation inputs are considered unobservable and the fair value measurement is categorized as a Level 3 measurement. Internal discounted cash flow analyses are also utilized to estimate the fair value of impaired loans, which considers internally-developed, unobservable inputs such as discount rates, default rates, and loss severity.
Total Level 3 impaired loans had an estimated fair value of $81.0$67.7 million and $67.4$77.3 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively. Impaired loans with a specific valuation allowance had a gross estimated fair value of $8.3$9.6 million and $10.9$19.3 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively, which was reduced by a specific valuation allowance of $3.9$5.6 million and $4.2 million, respectively.for each period.
Other assets acquired through foreclosure: Other assets acquired through foreclosure consist of properties acquired as a result of, or in-lieu-of, foreclosure. These assets are initially reported at the fair value determined by independent appraisals using appraised value less estimated cost to sell. Such properties are generally re-appraised every twelve months. There is risk for subsequent volatility. Costs relating to the development or improvement of the assets are capitalized and costs relating to holding the assets are charged to expense.
Fair value is determined, where possible, using market prices derived from an appraisal or evaluation, which are considered to be Level 2. However, certain assumptions and unobservable inputs are often used by the appraiser, therefore qualifying the assets as Level 3 in the fair value hierarchy. When significant adjustments are based on unobservable inputs, such as when a current appraised value is not available or management determines the fair value of the collateral is further impaired below the

appraised value and there is no observable market price, the resulting fair value measurement has been categorized as a Level 3 measurement. The Company had $31.0$30.2 million and $47.8$28.5 million of such assets at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
Credit vs. non-credit losseslosses
Under the provisions of ASC 320, Investments-Debt and Equity Securities, OTTI is separated into the amount of total impairment related to the credit loss and the amount of the total impairment related to all other factors. The amount of the total OTTI related to the credit loss is recognized in earnings. The amount of the total impairment related to all other factors is recognized in OCI.
For the three and six months ended June 30,March 31, 2018 and 2017, and 2016, the Company determined that no securities experienced credit losses.
There is no OTTI balance recognized in comprehensive income as of June 30, 2017March 31, 2018 and 2016.2017.
FAIR VALUE OF FINANCIAL INSTRUMENTSFair Value Of Financial Instruments
The estimated fair value of the Company’s financial instruments is as follows: 
 June 30, 2017 March 31, 2018
 Carrying Amount Fair Value Carrying Amount Fair Value
 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total
 (in thousands) (in thousands)
Financial assets:                    
Investment securities:                    
HTM $132,802
 $
 $137,526
 $
 $137,526
 $262,304
 $
 $255,418
 $
 $255,418
AFS 3,084,658
 146,988
 2,937,670
 
 3,084,658
 3,405,462
 144,164
 3,261,298
 
 3,405,462
Derivative assets 3,793
 
 3,793
 
 3,793
 5,387
 
 5,387
 
 5,387
Loans, net 13,858,184
 
 13,546,599
 80,992
 13,627,591
 15,415,794
 
 15,254,388
 67,675
 15,322,063
Accrued interest receivable 75,994
 
 75,994
 
 75,994
 80,398
 
 80,398
 
 80,398
Financial liabilities:                    
Deposits $16,031,113
 $
 $16,037,566
 $
 $16,037,566
 $17,354,538
 $
 $17,360,147
 $
 $17,360,147
Customer repurchase agreements 32,661
 
 32,661
 
 32,661
 21,676
 
 21,676
 
 21,676
FHLB advances 300,000
 
 300,000
 
 300,000
Qualifying debt 375,444
 
 
 401,093
 401,093
 363,935
 
 331,190
 64,842
 396,032
Derivative liabilities 64,153
 
 64,153
 
 64,153
 44,353
 
 44,353
 
 44,353
Accrued interest payable 16,146
 
 16,146
 
 16,146
 11,540
 
 11,540
 
 11,540
 December 31, 2016 December 31, 2017
 Carrying Amount Fair Value Carrying Amount Fair Value
 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total
 (in thousands) (in thousands)
Financial assets:                    
Investment securities:                    
HTM $92,079
 $
 $91,966
 $
 $91,966
 $255,050
 $
 $256,314
 $
 $256,314
AFS 2,609,380
 151,775
 2,457,605
 
 2,609,380
 3,499,519
 103,812
 3,395,707
 
 3,499,519
Trading 1,053
 
 1,053
 
 1,053
Derivative assets 4,220
 
 4,220
 
 4,220
 3,711
 
 3,711
 
 3,711
Loans, net 13,083,732
 
 12,736,336
 67,408
 12,803,744
 14,953,885
 
 14,577,010
 77,316
 14,654,326
Accrued interest receivable 70,320
 
 70,320
 
 70,320
 85,517
 
 85,517
 
 85,517
Financial liabilities:                   
Deposits $14,549,863
 $
 $14,553,931
 $
 $14,553,931
 $16,972,532
 $
 $16,980,066
 $
 $16,980,066
Customer repurchase agreements 41,728
 
 41,728
 
 41,728
 26,017
 
 26,017
 
 26,017
FHLB advances 80,000
 
 80,000
 
 80,000
 390,000
 
 390,000
 
 390,000
Qualifying debt 367,937
 
 
 375,626
 375,626
 376,905
 
 336,803
 67,210
 404,013
Derivative liabilities 65,749
 
 65,749
 
 65,749
 55,340
 
 55,340
 
 55,340
Accrued interest payable 15,354
 
 15,354
 
 15,354
 16,366
 
 16,366
 
 16,366

Interest rate risk
The Company assumes interest rate risk (the risk to the Company’s earnings and capital from changes in interest rate levels) as a result of its normal operations. As a result, the fair values of the Company’s financial instruments, as well as its future net interest income will change when interest rate levels change and that change may be either favorable or unfavorable to the Company.
Interest rate risk exposure is measured using interest rate sensitivity analysis to determine the Company's change in EVE and net interest income resulting from hypothetical changes in interest rates. If potential changes to EVE and net interest income resulting from hypothetical interest rate changes are not within the limits established by the BOD, the BOD may direct management to adjust the asset and liability mix to bring interest rate risk within BOD-approved limits. As of June 30, 2017, the Company’s interest rate risk profile was within BOD-approved limits.
WAB has an ALCO charged with managing interest rate risk within the BOD-approved limits. Limits are structured to prohibit an interest rate risk profile that does not conform to both management and BOD risk tolerances. There is also ALCO reporting at the Parent company level for reviewing interest rate risk for the Company, which gets reported to the BOD and its Finance and Investment Committee.
Fair value of commitments
The estimated fair value of standby letters of credit outstanding at June 30, 2017March 31, 2018 and December 31, 20162017 is insignificant. Loan commitments on which the committed interest rates are less than the current market rate are also insignificant at June 30, 2017March 31, 2018 and December 31, 2016.2017.

14. SEGMENTS
The Company's reportable segments are aggregated based primarily on geographic location, services offered, and markets served. The Company's regional segments, which include Arizona, Nevada, Southern California, and Northern California, provide full service banking and related services to their respective markets. The operations from the regional segments correspond to the following banking divisions: ABA in Arizona, BON and FIB in Nevada, TPB in Southern California, and Bridge in Northern California.
The Company's NBL segments provide specialized banking services to niche markets. The Company's NBL reportable segments include HOA Services, Public & Nonprofit Finance, Technology & Innovation, HFF, and Other NBLs. These NBLs are managed centrally and are broader in geographic scope than the Company's other segments, though still predominately located within the Company's core market areas. The HOA Services NBL corresponds to the AAB division. The operations of Public and Nonprofit Finance are combined into one reportable segment. The Technology & Innovation NBL includes the operations of Equity Fund Resources, Life Sciences Group, Renewable Resource Group, and Technology Finance. The HFF NBL includes the hotel franchise loan portfolio acquired from GE Capital US Holdings, Inc. on April 20, 2016. The Other NBLs segment consists of Corporate Finance, Mortgage Warehouse Lending, and Resort Finance.
The Corporate & Other segment consists of corporate-related items, income and expense items not allocated to the Company's other reportable segments, and inter-segment eliminations.
The Company's segment reporting process begins with the assignment of all loan and deposit accounts directly to the segments where these products are originated and/or serviced. Equity capital is assigned to each segment based on the risk profile of their assets and liabilities. With the exception of goodwill, which is assigned a 100% weighting, equity capital allocations ranged from 0% to 12% during the year, with a funds credit provided for the use of this equity as a funding source. Any excess or deficient equity not allocated to segments based on risk is assigned to the Corporate & Other segment.
Net interest income, provision for credit losses, and non-interest expense amounts are recorded in their respective segment to the extent that the amounts are directly attributable to those segments. Net interest income is recorded in each segment on a TEB with a corresponding increase in income tax expense, which is eliminated in the Corporate & Other segment.
Further, net interest income of a reportable segment includes a funds transfer pricing process that matches assets and liabilities with similar interest rate sensitivity and maturity characteristics. Using this funds transfer pricing methodology, liquidity is transferred between users and providers. A net user of funds has lending/investing in excess of deposits/borrowings and a net provider of funds has deposits/borrowings in excess of lending/investing. A segment that is a user of funds is charged for the use of funds, while a provider of funds is credited through funds transfer pricing, which is determined based on the average life of the assets or liabilities in the portfolio.
The net income amount for each reportable segment is further derived by the use of expense allocations. Certain expenses not directly attributable to a specific segment are allocated across all segments based on key metrics, such as number of employees, average loan balances, and average deposit balances. These types of expenses include information technology, operations, human resources, finance, risk management, credit administration, legal, and marketing.
Income taxes are applied to each segment based on the effective tax rate for the geographic location of the segment. Any difference in the corporate tax rate and the aggregate effective tax rates in the segments are adjusted in the Corporate & Other segment.

The following is a summary of operating segment information for the periods indicated:
    Regional Segments
Balance Sheet: Consolidated Company Arizona Nevada Southern California Northern California
At June 30, 2017 (in millions)
Assets:          
Cash, cash equivalents, and investment securities $3,889.7
 $1.8
 $7.4
 $2.2
 $1.9
Loans, net of deferred loan fees and costs 13,989.9
 3,089.9
 1,729.3
 1,838.4
 1,172.5
Less: allowance for credit losses (131.8) (30.7) (18.3) (20.6) (10.1)
Total loans 13,858.1
 3,059.2
 1,711.0
 1,817.8
 1,162.4
Other assets acquired through foreclosure, net 31.0
 2.3
 15.7
 
 0.2
Goodwill and other intangible assets, net 301.6
 
 23.3
 
 157.0
Other assets 764.3
 41.7
 59.3
 13.8
 13.8
Total assets $18,844.7
 $3,105.0
 $1,816.7
 $1,833.8
 $1,335.3
Liabilities:          
Deposits $16,031.1
 $4,778.5
 $3,925.3
 $2,251.6
 $1,547.8
Borrowings and qualifying debt 375.4
 
 
 
 
Other liabilities 379.5
 8.6
 27.9
 5.9
 11.0
Total liabilities 16,786.0
 4,787.1
 3,953.2
 2,257.5
 1,558.8
Allocated equity: 2,058.7
 373.9
 253.3
 205.8
 291.0
Total liabilities and stockholders' equity $18,844.7
 $5,161.0
 $4,206.5
 $2,463.3
 $1,849.8
Excess funds provided (used) 
 2,056.0
 2,389.8
 629.5
 514.5
Income Statement:          
Three Months Ended June 30, 2017: (in thousands)
Net interest income (expense) $192,743
 $49,295
 $36,422
 $29,058
 $19,719
Provision for credit losses 3,000
 384
 (3,123) (53) 698
Net interest income (expense) after provision for credit losses 189,743
 48,911
 39,545
 29,111
 19,021
Non-interest income 10,449
 1,189
 2,313
 888
 1,930
Non-interest expense (88,257) (17,922) (15,115) (13,020) (12,162)
Income (loss) before income taxes 111,935
 32,178
 26,743
 16,979
 8,789
Income tax expense (benefit) 31,964
 12,624
 9,360
 7,140
 3,696
Net income (loss) $79,971
 $19,554
 $17,383
 $9,839
 $5,093
Six Months Ended June 30, 2017: (in thousands)
Net interest income (expense) $372,052
 $93,202
 $71,718
 $54,276
 $41,754
Provision for (recovery of) credit losses 7,250
 398
 (3,334) 38
 1,094
Net interest income (expense) after provision for credit losses 364,802
 92,804
 75,052
 54,238
 40,660
Non-interest income 20,993
 2,302
 4,446
 1,631
 4,043
Non-interest expense (176,014) (36,544) (30,985) (25,723) (24,871)
Income (loss) before income taxes 209,781
 58,562
 48,513
 30,146
 19,832
Income tax expense (benefit) 56,453
 22,974
 16,980
 12,677
 8,339
Net income (loss) $153,328
 $35,588
 $31,533
 $17,469
 $11,493

    Regional Segments
Balance Sheet: Consolidated Company Arizona Nevada Southern California Northern California
At March 31, 2018 (in millions)
Assets:          
Cash, cash equivalents, and investment securities $4,173.7
 $2.1
 $8.5
 $2.2
 $2.5
Loans, net of deferred loan fees and costs 15,560.4
 3,472.7
 1,819.6
 2,013.6
 1,271.4
Less: allowance for credit losses (144.7) (33.9) (17.9) (20.3) (11.2)
Total loans 15,415.7
 3,438.8
 1,801.7
 1,993.3
 1,260.2
Other assets acquired through foreclosure, net 30.2
 2.3
 15.0
 
 0.2
Goodwill and other intangible assets, net 300.4
 
 23.2
 
 156.3
Other assets 840.7
 46.4
 58.3
 14.8
 15.1
Total assets $20,760.7
 $3,489.6
 $1,906.7
 $2,010.3
 $1,434.3
Liabilities:          
Deposits $17,354.5
 $5,020.6
 $3,648.1
 $2,423.8
 $1,814.4
Borrowings and qualifying debt 663.9
 
 
 
 
Other liabilities 448.6
 10.9
 16.2
 1.9
 10.5
Total liabilities 18,467.0
 5,031.5
 3,664.3
 2,425.7
 1,824.9
Allocated equity: 2,293.7
 24.7
 21.8
 10.3
 7.6
Total liabilities and stockholders' equity $20,760.7
 $5,056.2
 $3,686.1
 $2,436.0
 $1,832.5
Excess funds provided (used) 
 1,566.6
 1,779.4
 425.7
 398.2

  National Business Lines  
Balance Sheet: HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance  Other NBLs Corporate & Other
At June 30, 2017            
Assets: (in millions)
Cash, cash equivalents, and investment securities $
 $
 $
 $
 $
 $3,876.4
Loans, net of deferred loan fees and costs 150.3
 1,545.7
 1,044.4
 1,238.5
 2,173.2
 7.7
Less: allowance for credit losses (1.6) (16.1) (10.1) (1.2) (22.6) (0.5)
Total loans 148.7
 1,529.6
 1,034.3
 1,237.3
 2,150.6
 7.2
Other assets acquired through foreclosure, net 
 
 
 
 
 12.8
Goodwill and other intangible assets, net 
 
 121.2
 0.1
 
 
Other assets 0.4
 16.4
 5.5
 5.3
 8.5
 599.6
Total assets $149.1
 $1,546.0
 $1,161.0
 $1,242.7
 $2,159.1
 $4,496.0
Liabilities:            
Deposits $2,186.9
 $
 $1,272.4
 $
 $
 $68.6
Borrowings and qualifying debt 
 
 
 
 
 375.4
Other liabilities 0.6
 50.7
 0.7
 0.3
 49.6
 224.2
Total liabilities 2,187.5
 50.7
 1,273.1
 0.3
 49.6
 668.2
Allocated equity: 57.1
 126.4
 229.5
 100.9
 175.5
 245.3
Total liabilities and stockholders' equity $2,244.6
 $177.1
 $1,502.6
 $101.2
 $225.1
 $913.5
Excess funds provided (used) 2,095.5
 (1,368.9) 341.6
 (1,141.5) (1,934.0) (3,582.5)
Income Statement:            
Three Months Ended June 30, 2017: (in thousands)
Net interest income (expense) $13,781
 $7,488
 $21,029
 $13,410
 $15,304
 $(12,763)
Provision for credit losses 165
 196
 603
 1,808
 2,322
 
Net interest income (expense) after provision for credit losses 13,616
 7,292
 20,426
 11,602
 12,982
 (12,763)
Non-interest income 140
 10
 1,961
 
 532
 1,486
Non-interest expense (7,258) (1,983) (9,082) (3,056) (4,566) (4,093)
Income (loss) before income taxes 6,498
 5,319
 13,305
 8,546
 8,948
 (15,370)
Income tax expense (benefit) 2,436
 1,994
 4,989
 3,205
 3,356
 (16,836)
Net income (loss) $4,062
 $3,325
 $8,316
 $5,341
 $5,592
 $1,466
Six Months Ended June 30, 2017: (in thousands)
Net interest income (expense) $26,529
 $13,973
 $39,195
 $26,991
 $29,447
 $(25,033)
Provision for (recovery of) credit losses 292
 705
 899
 1,808
 5,849
 (499)
Net interest income (expense) after provision for credit losses 26,237
 13,268
 38,296
 25,183
 23,598
 (24,534)
Non-interest income 281
 25
 3,834
 
 1,253
 3,178
Non-interest expense (14,405) (4,236) (17,861) (6,044) (9,287) (6,058)
Income (loss) before income taxes 12,113
 9,057
 24,269
 19,139
 15,564
 (27,414)
Income tax expense (benefit) 4,542
 3,396
 9,100
 7,177
 5,837
 (34,569)
Net income (loss) $7,571
 $5,661
 $15,169
 $11,962
 $9,727
 $7,155




    Regional Segments
Balance Sheet: Consolidated Company Arizona Nevada Southern California Northern California
At December 31, 2016 (in millions)
Assets:          
Cash, cash equivalents, and investment securities $3,052.3
 $1.9
 $10.1
 $2.1
 $1.9
Loans, net of deferred loan fees and costs 13,208.5
 2,955.9
 1,725.5
 1,766.8
 1,095.4
Less: allowance for credit losses (124.7) (30.1) (18.5) (19.4) (8.8)
Total loans 13,083.8
 2,925.8
 1,707.0
 1,747.4
 1,086.6
Other assets acquired through foreclosure, net 47.8
 6.2
 18.0
 
 0.3
Goodwill and other intangible assets, net 302.9
 
 23.7
 
 157.5
Other assets 714.0
 42.9
 58.8
 14.5
 14.3
Total assets $17,200.8
 $2,976.8
 $1,817.6
 $1,764.0
 $1,260.6
Liabilities:          
Deposits $14,549.8
 $3,843.4
 $3,731.5
 $2,382.6
 $1,543.6
Borrowings and qualifying debt 447.9
 
 
 
 
Other liabilities 311.6
 12.8
 28.3
 12.9
 12.4
Total liabilities 15,309.3
 3,856.2
 3,759.8
 2,395.5
 1,556.0
Allocated equity: 1,891.5
 346.6
 250.7
 201.6
 283.7
Total liabilities and stockholders' equity $17,200.8
 $4,202.8
 $4,010.5
 $2,597.1
 $1,839.7
Excess funds provided (used) 
 1,226.0
 2,192.9
 833.1
 579.1
Income Statement:          
Three Months Ended June 30, 2016: (in thousands)
Net interest income (expense) $163,686
 $41,204
 $33,464
 $25,803
 $21,896
Provision for (recovery of) credit losses 2,500
 1,703
 (1,704) 220
 926
Net interest income (expense) after provision for credit losses 161,186
 39,501
 35,168
 25,583
 20,970
Non-interest income 8,559
 888
 2,097
 561
 2,516
Non-interest expense (81,804) (14,550) (14,824) (10,635) (13,481)
Income (loss) before income taxes 87,941
 25,839
 22,441
 15,509
 10,005
Income tax expense (benefit) 26,327
 10,137
 7,855
 6,522
 4,206
Net income (loss) $61,614
 $15,702
 $14,586
 $8,987
 $5,799
Six Months Ended June 30, 2016: (in thousands)
Net interest income (expense) $309,397
 $79,660
 $66,039
 $50,231
 $45,091
Provision for (recovery of) credit losses 5,000
 8,476
 (2,517) 250
 1,968
Net interest income (expense) after provision for credit losses 304,397
 71,184
 68,556
 49,981
 43,123
Non-interest income 21,692
 4,569
 4,156
 1,221
 4,942
Non-interest expense (157,297) (29,006) (29,570) (21,869) (27,448)
Income (loss) before income taxes 168,792
 46,747
 43,142
 29,333
 20,617
Income tax expense (benefit) 45,846
 18,339
 15,100
 12,335
 8,669
Net income (loss) $122,946
 $28,408
 $28,042
 $16,998
 $11,948

  National Business Lines  
Balance Sheet: HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance Other NBLs Corporate & Other
At March 31, 2018            
Assets: (in millions)
Cash, cash equivalents, and investment securities $
 $
 $
 $
 $
 $4,158.4
Loans, net of deferred loan fees and costs 167.0
 1,539.8
 1,168.9
 1,378.7
 2,725.4
 3.3
Less: allowance for credit losses (1.7) (15.5) (10.3) (6.3) (27.5) (0.1)
Total loans 165.3
 1,524.3
 1,158.6
 1,372.4
 2,697.9
 3.2
Other assets acquired through foreclosure, net 
 
 
 
 
 12.7
Goodwill and other intangible assets, net 
 
 120.8
 0.1
 
 
Other assets 0.8
 14.7
 6.8
 6.4
 13.4
 664.0
Total assets $166.1
 $1,539.0
 $1,286.2
 $1,378.9
 $2,711.3
 $4,838.3
Liabilities:            
Deposits $2,475.3
 $
 $1,733.5
 $
 $
 $238.8
Borrowings and qualifying debt 
 
 
 
 
 663.9
Other liabilities 1.6
 21.5
 1.2
 (0.3) 124.3
 260.8
Total liabilities 2,476.9
 21.5
 1,734.7
 (0.3) 124.3
 1,163.5
Allocated equity: 5.9
 1.3
 11.1
 8.3
 9.3
 2,193.4
Total liabilities and stockholders' equity $2,482.8
 $22.8
 $1,745.8
 $8.0
 $133.6
 $3,356.9
Excess funds provided (used) 2,316.7
 (1,516.2) 459.6
 (1,370.9) (2,577.7) (1,481.4)





 National Business Lines     Regional Segments
Balance Sheet: HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance  Other NBLs Corporate & Other
At December 31, 2016            

 Consolidated Company Arizona Nevada Southern California Northern California
At December 31, 2017 (in millions)
Assets: (in millions)          
Cash, cash equivalents, and investment securities $
 $
 $
 $
 $
 $3,036.3
 $4,237.1
 $2.1
 $8.2
 $2.1
 $1.7
Loans, net of deferred loan fees and costs 116.8
 1,454.3
 1,011.4
 1,292.1
 1,776.9
 13.4
 15,093.9
 3,323.7
 1,844.8
 1,934.7
 1,275.5
Less: allowance for credit losses (1.3) (15.6) (10.6) (0.8) (19.0) (0.6) (140.0) (31.5) (18.1) (19.5) (13.2)
Total loans 115.5
 1,438.7
 1,000.8
 1,291.3
 1,757.9
 12.8
 14,953.9
 3,292.2
 1,826.7
 1,915.2
 1,262.3
Other assets acquired through foreclosure, net 
 
 
 
 
 23.3
 28.5
 2.3
 13.3
 
 0.2
Goodwill and other intangible assets, net 
 
 121.5
 0.2
 
 
 300.7
 
 23.2
 
 156.5
Other assets 0.3
 15.6
 7.2
 5.3
 11.1
 544.0
 808.9
 46.3
 58.8
 14.4
 15.1
Total assets $115.8
 $1,454.3
 $1,129.5
 $1,296.8
 $1,769.0
 $3,616.4
 $20,329.1
 $3,342.9
 $1,930.2
 $1,931.7
 $1,435.8
Liabilities:                      
Deposits $1,890.3
 $
 $1,038.2
 $
 $
 $120.2
 $16,972.5
 $4,841.3
 $3,951.4
 $2,461.1
 $1,681.7
Borrowings and qualifying debt 
 
 
 
 
 447.9
 766.9
 
 
 
 
Other liabilities 0.7
 50.5
 2.0
 1.4
 17.5
 173.1
 360.0
 11.6
 20.9
 3.2
 11.9
Total liabilities 1,891.0
 50.5
 1,040.2
 1.4
 17.5
 741.2
 18,099.4
 4,852.9
 3,972.3
 2,464.3
 1,693.6
Allocated equity: 65.6
 117.1
 224.1
 107.1
 145.5
 149.5
 2,229.7
 396.5
 263.7
 221.8
 303.1
Total liabilities and stockholders' equity $1,956.6
 $167.6
 $1,264.3
 $108.5
 $163.0
 $890.7
 $20,329.1
 $5,249.4
 $4,236.0
 $2,686.1
 $1,996.7
Excess funds provided (used) 1,840.8
 (1,286.7) 134.8
 (1,188.3) (1,606.0) (2,725.7) 
 1,906.5
 2,305.8
 754.4
 560.9
Income Statement:            
Three Months Ended June 30, 2016: (in thousands)
Net interest income (expense) $9,909
 $5,026
 $16,631
 $12,068
 $12,523
 $(14,838)
Provision for (recovery of) credit losses 10
 175
 (614) 
 1,699
 85
Net interest income (expense) after provision for credit losses 9,899
 4,851
 17,245
 12,068
 10,824
 (14,923)
Non-interest income 110
 7
 1,115
 
 235
 1,030
Non-interest expense (5,820) (1,929) (7,434) (2,557) (3,598) (6,976)
Income (loss) before income taxes 4,189
 2,929
 10,926
 9,511
 7,461
 (20,869)
Income tax expense (benefit) 1,571
 1,098
 4,097
 3,567
 2,798
 (15,524)
Net income (loss) $2,618
 $1,831
 $6,829
 $5,944
 $4,663
 $(5,345)
  National Business Lines  

 HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance Other NBLs Corporate & Other
At December 31, 2017            
Assets: (in millions)
Cash, cash equivalents, and investment securities $
 $
 $
 $
 $
 $4,223.0
Loans, net of deferred loan fees and costs 162.1
 1,580.4
 1,097.9
 1,327.7
 2,543.0
 4.1
Less: allowance for credit losses (1.6) (15.6) (11.4) (4.0) (25.0) (0.1)
Total loans 160.5
 1,564.8
 1,086.5
 1,323.7
 2,518.0
 4.0
Other assets acquired through foreclosure, net 
 
 
 
 
 12.7
Goodwill and other intangible assets, net 
 
 120.9
 0.1
 
 
Other assets 0.9
 17.9
 6.0
 5.9
 15.5
 628.1
Total assets $161.4
 $1,582.7
 $1,213.4
 $1,329.7
 $2,533.5
 $4,867.8
Liabilities:            
Deposits $2,230.4
 $
 $1,737.6
 $
 $
 $69.0
Borrowings and qualifying debt 
 
 
 
 
 766.9
Other liabilities 1.2
 42.4
 0.8
 0.4
 5.5
 262.1
Total liabilities 2,231.6
 42.4
 1,738.4
 0.4
 5.5
 1,098.0
Allocated equity: 59.4
 126.5
 244.1
 108.3
 206.0
 300.3
Total liabilities and stockholders' equity $2,291.0
 $168.9
 $1,982.5
 $108.7
 $211.5
 $1,398.3
Excess funds provided (used) 2,129.6
 (1,413.8) 769.1
 (1,221.0) (2,322.0) (3,469.5)

Six Months Ended June 30, 2016: (in thousands)
   Regional Segments
 Consolidated Company Arizona Nevada Southern California Northern California
Three Months Ended March 31, 2018 (in thousands)
Net interest income (expense) $18,541
 $10,247
 $32,940
 $12,068
 $23,160
 $(28,580) $214,220
 $54,555
 $36,690
 $27,802
 $22,255
Provision for (recovery of) credit losses 88
 (194) (1,779) 
 1,937
 (3,229)
Provision for (recovery) credit losses 6,000
 1,434
 (1,723) 729
 1,548
Net interest income (expense) after provision for credit losses 18,453
 10,441
 34,719
 12,068
 21,223
 (25,351) 208,220
 53,121
 38,413
 27,073
 20,707
Non-interest income 215
 3
 2,752
 
 870
 2,964
 11,643
 1,416
 3,333
 1,001
 2,547
Non-interest expense (11,361) (3,953) (14,340) (2,557) (7,035) (10,158) (98,149) (21,504) (14,084) (13,646) (12,503)
Income (loss) before income taxes 7,307
 6,491
 23,131
 9,511
 15,058
 (32,545) 121,714
 33,033
 27,662
 14,428
 10,751
Income tax expense (benefit) 2,740
 2,434
 8,674
 3,567
 5,647
 (31,659) 20,814
 8,321
 5,903
 4,135
 3,098
Net income (loss) $4,567
 $4,057
 $14,457
 $5,944
 $9,411
 $(886)
Net income $100,900
 $24,712
 $21,759
 $10,293
 $7,653


  National Business Lines  
  HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance Other NBLs Corporate & Other
Three Months Ended March 31, 2018 (in thousands)
Net interest income (expense) $15,359
 $3,746
 $22,821
 $14,185
 $18,811
 $(2,004)
Provision for (recovery) credit losses 47
 (207) 1,651
 1,236
 1,285
 
Net interest income (expense) after provision for credit losses 15,312
 3,953
 21,170
 12,949
 17,526
 (2,004)
Non-interest income 150
 
 3,051
 13
 224
 (92)
Non-interest expense (7,803) (2,174) (9,833) (2,206) (5,662) (8,734)
Income (loss) before income taxes 7,659
 1,779
 14,388
 10,756
 12,088
 (10,830)
Income tax expense (benefit) 1,761
 409
 3,309
 2,474
 2,780
 (11,376)
Net income $5,898
 $1,370
 $11,079
 $8,282
 $9,308
 $546
    Regional Segments
  Consolidated Company Arizona Nevada Southern California Northern California
Three Months Ended March 31, 2017 (in thousands)
Net interest income (expense) $179,309
 $43,907
 $35,296
 $25,218
 $22,035
Provision for (recovery of) credit losses 4,250
 14
 (211) 91
 396
Net interest income (expense) after provision for credit losses 175,059
 43,893
 35,507
 25,127
 21,639
Non-interest income 10,599
 1,113
 2,133
 743
 2,113
Non-interest expense (87,827) (18,622) (15,870) (12,703) (12,709)
Income (loss) before income taxes 97,831
 26,384
 21,770
 13,167
 11,043
Income tax expense (benefit) 24,489
 10,350
 7,620
 5,537
 4,643
Net income (loss) $73,342
 $16,034
 $14,150
 $7,630
 $6,400
  National Business Lines  
  HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance Other NBLs Corporate & Other
Three Months Ended March 31, 2017 (in thousands)
Net interest income (expense) $12,748
 $6,485
 $18,166
 $13,581
 $14,143
 $(12,270)
Provision for (recovery) credit losses 127
 509
 296
 
 3,527
 (499)
Net interest income (expense) after provision for credit losses 12,621
 5,976
 17,870
 13,581
 10,616
 (11,771)
Non-interest income 141
 70
 1,873
 
 721
 1,692
Non-interest expense (7,147) (2,323) (8,779) (2,988) (4,721) (1,965)
Income (loss) before income taxes 5,615
 3,723
 10,964
 10,593
 6,616
 (12,044)
Income tax expense (benefit) 2,106
 1,402
 4,111
 3,972
 2,481
 (17,733)
Net income $3,509
 $2,321
 $6,853
 $6,621
 $4,135
 $5,689

15. MERGERS, ACQUISITIONS AND DISPOSITIONSREVENUE FROM CONTRACTS WITH CUSTOMERS
AcquisitionAdoption of GE Capital US Holdings, Inc. Loan PortfolioASU 2014-09, Revenue from Contracts with Customers, Amendments to ASC 606
The core principal of ASC 606, Revenue from Contracts with Customers, is that an entity shall recognize revenue at an amount that reflects the consideration to which the entity expects to be entitled in exchange for transferring goods or services to a customer. ASC 606 requires entities to exercise more judgment when considering the terms of a contract than under ASC 605, Revenue Recognition. ASC 606 applies to all contracts with customers to provide goods or services in the ordinary course of business, except for contracts that are specifically excluded from its scope. The majority of the Company’s revenue streams including interest income, credit and debit card fees, income from equity investments including warrants and SBIC equity income, income from bank owned life insurance, foreign currency income, lending related income, and gains and losses on sales of investment securities are outside the scope of ASC 606. Revenue streams including service charges and fees, interchange fees on credit and debit cards, and success fees are within the scope of ASC 606.
On April 20, 2016, WABJanuary 1, 2018, the Company adopted the amendments to ASC 606 using the modified retrospective method, and applied the guidance to all contracts in scope that were not completed its acquisitionas of GE Capital US Holdings, Inc.'s domestic select-service hotel franchise finance loan portfolio, paying cash of $1.27 billion.January 1, 2018. Comparative prior periods have not been adjusted and are presented under ASC 605. The acquisition was undertaken, in part, to expand the Company's national reach and diversify the Company's loan portfolio.
Effective April 20, 2016, the results of the acquired loan portfolio are reflected in the Company's HFF NBL operating segment. There were no acquisition / restructure expenses relatedCompany did not identify any material changes to the acquisition recognized during the three and six months ended June 30, 2017. For the three and six months ended June 30, 2016, acquisition / restructure expenses related to the acquisition totaled $1.9 million. The transaction was accounted for under the acquisition methodtiming or amount of accounting in accordance with ASC 805. Assets purchased and liabilities assumed were recorded at their respective acquisition date estimated fair values. The fair valuesrevenue recognition as a result of assets acquired and liabilities assumed are subject to adjustment during the first twelve months after the acquisition date if additional information becomes available to indicate a more accurate or appropriate value for an asset or liability. During the six months ended June 30, 2017, the Company recognized measurement period adjustments totaling $0.1 million for tax related items. The measurement period for the HFF acquisition ended on April 20, 2017. Therefore, the fair valuesadoption.
Disaggregation of these assets acquired and liabilities assumed were considered final effective April 20, 2017.
The recognized amounts of identifiable assets acquired and liabilities assumed, at their as adjusted acquisition date fair values, are as follows:
 April 20, 2016
 (in thousands)
Assets: 
Loans$1,280,997
Other assets3,632
Total assets$1,284,629
Liabilities: 
Other liabilities$12,559
Total liabilities12,559
Net assets acquired$1,272,070
Consideration paid 
Cash$1,272,187
Goodwill$117
Revenue
The following table presents pro forma information as ifrepresents a disaggregation of revenue from contracts with customers for the acquisition was completed on January 1, 2015. The pro forma information includes adjustmentsperiods indicated along with the reportable segment for interest income on loans acquired and excludes acquisition / restructure expense. The pro forma information is not necessarily indicative of the results of operations as they would have been had the transactions been effected on the assumed dates.each revenue category:
 Three Months Ended June 30, 2016 Six Months Ended June 30, 2016
 (in thousands, except per share amounts)
Interest income$172,779
 $343,664
Non-interest income8,559
 21,692
Net income61,749
 130,240
Earnings per share - basic0.60
 1.27
Earnings per share - diluted0.60
 1.26
    Regional Segments
Three Months Ended March 31, 2018 Consolidated Company Arizona Nevada Southern California Northern California
  (in thousands)
Revenue from contracts with customers:          
Service charges and fees $5,745
 $917
 $2,069
 $738
 $1,059
Debit and credit card interchange (1) 1,508
 257
 272
 139
 837
Success fees (2) 781
 
 
 
 2
Other income 235
 61
 69
 27
 73
Total revenue from contracts with customers $8,269
 $1,235
 $2,410
 $904
 $1,971
Revenues outside the scope of ASC 606 (3) 3,374
 181
 923
 97
 576
Total non-interest income $11,643
 $1,416
 $3,333
 $1,001
 $2,547
  National Business Lines  
Three Months Ended March 31, 2018 HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance Other NBLs Corporate & Other
  (in thousands)
Revenue from contracts with customers:            
Service charges and fees $146
 $
 $815
 $
 $
 $1
Debit and credit card interchange (1) 3
 
 
 
 
 
Success fees (2) 
 
 779
 
 
 
Other income 
 
 
 
 
 5
Total revenue from contracts with customers $149
 $
 $1,594
 $
 $
 $6
Revenues outside the scope of ASC 606 (3) 1
 
 1,457
 13
 224
 (98)
Total non-interest income $150
 $
 $3,051
 $13
 $224
 $(92)

    Regional Segments
Three Months Ended March 31, 2017 Consolidated Company Arizona Nevada Southern California Northern California
  (in thousands)
Revenue from contracts with customers:          
Service charges and fees $4,738
 $619
 $1,662
 $496
 $1,028
Debit and credit card interchange (1) 1,215
 214
 234
 129
 638
Success fees (2) 325
 
 
 
 145
Other income 119
 11
 3
 (27) 42
Total revenue from contracts with customers $6,397
 $844
 $1,899
 $598
 $1,853
Revenues outside the scope of ASC 606 (3) 4,202
 269
 234
 145
 260
Total non-interest income $10,599
 $1,113
 $2,133
 $743
 $2,113
  National Business Lines  
Three Months Ended March 31, 2017 HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance Other NBLs Corporate & Other
  (in thousands)
Revenue from contracts with customers:            
Service charges and fees $141
 $
 $795
 $
 $
 $(3)
Debit and credit card interchange (1) 
 
 
 
 
 
Success fees (2) 
 
 180
 
 
 
Other income 
 
 
 
 85
 5
Total revenue from contracts with customers $141
 $
 $975
 $
 $85
 $2
Revenues outside the scope of ASC 606 (3) 
 70
 898
 
 636
 1,690
Total non-interest income $141
 $70
 $1,873
 $
 $721
 $1,692
(1)Included as part of Card income in the Consolidated Income Statement.
(2)Included as part of Income from equity investments in the Consolidated Income Statement.
(3)Amounts are accounted for under separate guidance. Refer to discussion of revenue sources not subject to ASC 606 under the Non-interest income section in "Note 1. Summary of Significant Accounting Policies."
Performance Obligations
Many of the services the Company performs for its customers are ongoing, and either party may cancel at any time. The fees for these contracts are dependent upon various underlying factors, such as customer deposit balances, and as such may be considered variable. The Company’s performance obligations for these services are satisfied as the services are rendered and payment is collected on a monthly, quarterly, or semi-annual basis. Other contracts with customers are for services to be provided at a point in time, and fees are recognized at the time such services are rendered. The Company had no material unsatisfied performance obligations as of March 31, 2018. The revenue streams within the scope of ASC 606 are described in further detail below.
Service Charges and Fees
The Company performs deposit account services for its customers, which include analysis and treasury management services, use of safe deposit boxes, check upcharges, and other ancillary services. The depository arrangements the Company holds with its customers are considered day-to-day contracts with ongoing renewals and optional purchases, and as such, the contract duration does not extend beyond the services performed. Due to the short-term nature of such contracts, the Company generally recognizes revenue for deposit related fees as services are rendered. From time to time, the Company may waive certain fees for its customers. The Company considers historical experience when recognizing revenue from contracts with customers, and may reduce the transaction price to account for fee waivers or refunds.
Debit and Credit Card Interchange
When a credit or debit card issued by the Company is used to purchase goods or services from a merchant, the Company earns an interchange fee. The Company considers the merchant its customer in these transactions as the Company provides the merchant with the service of enabling the cardholder to purchase the merchant’s goods or services with increased convenience, and it enables the merchants to transact with a class of customer that may not have access to sufficient funds at the time of purchase. The Company acts as an agent to the payment network by providing nightly settlement services between the network and the merchant. This transmission of data and funds represents the Company’s performance obligation and is performed nightly. As the payment network

is in direct control of setting the rates and the Company is acting as an agent, the interchange fee is recorded net of expenses as the services are provided.
Success Fees
Success fees are one-time fees detailed as part of certain loan agreements and are earned immediately upon occurrence of a triggering event. Examples of triggering events include: a borrower obtaining its next round of funding, an acquisition, or completion of a public offering. Success fees are variable consideration as the transaction price can vary and is contingent on the occurrence or non-occurrence of a future event. As the consideration is highly susceptible to factors outside of the Company’s influence and uncertainty about the amount of consideration is not expected to be resolved for an extended period of time, the variable consideration is constrained and is not recognized until the achievement of the triggering event.
Principal versus Agent Considerations
When more than one party is involved in providing goods or services to a customer, ASC 606 requires the Company to determine whether it is the principal or an agent in these transactions by evaluating the nature of its promise to the customer. An entity is a principal and therefore records revenue on a gross basis, if it controls a promised good or service before transferring that good or service to the customer. An entity is an agent and records as revenue the net amount it retains for its agency services if its role is to arrange for another entity to provide the goods or services. The Company most commonly acts as a principal and records revenue on a gross basis, except in certain circumstances. As an example, revenues earned from interchange fees, in which the Company acts as an agent, are recorded as non-interest income, net of the related expenses paid to the principal.
Practical Expedients
The Company has elected to apply the practical expedient allowed in ASC 340-40-25-4, which permits the Company to immediately expense contract acquisition costs, such as commissions, when the asset that would have resulted from capitalizing these costs would be amortized in one year or less. The practical expedient described in ASC 606-10-32-18, which is associated with the determination of whether a significant financing component exists, is not currently applicable to the Company.
Contract Balances
The timing of revenue recognition may differ from the timing of cash settlements or invoicing to customers. The Company records contract liabilities, or deferred revenue, when payments from customers are received or due in advance of providing services to customers. The Company generally receives payments for its services during the period or at the time services are provided, therefore, does not have material contract liability balances at period-end. The Company records contract assets or receivables when revenue is recognized prior to receipt of cash from the customer. Accounts receivable total $1.4 million and $1.3 million as of March 31, 2018 and December 31, 2017, respectively, and are presented in Other assets in the Consolidated Balance Sheets.
16. RELATED PARTY TRANSACTIONS
Principal stockholders, directors, and executive officers of the Company, their immediate family members, and companies they control or own more than a 10% interest in, are considered to be related parties. In the ordinary course of business, the Company engages in various related party transactions, including extending credit and bank service transactions. All related party transactions are subject to review and approval pursuant to the Company's Related Party Transactions policy.
On April 1, 2017, the Company hired an executive officer who was previously the Managing Partner of an external consulting firm that the Company actively uses for risk management services. Prior to joining the Company, the executive officer sold his interest in this external consulting firm and was paid with a combination of cash and a $1.0 million note that will be paid in equal installments ending in 2019. Expenses to this external consulting firm as well as sponsorships, donations and other services to related parties totaled less than $2.0$0.5 million during each offor the sixthree months ended June 30, 2017March 31, 2018 and 2016.less than $1.5 million for the three months ended March 31, 2017.

Item 2.Management's Discussions and Analysis of Financial Condition and Results of Operations.

This discussion is designed to provide insight into management's assessment of significant trends related to the Company's consolidated financial condition, results of operations, liquidity, capital resources, and interest rate sensitivity. This Quarterly Report on Form 10-Q should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 20162017 and the interim Unaudited Consolidated Financial Statements and Notes to Unaudited Consolidated Financial Statements hereto and financial information appearing elsewhere in this report. Unless the context requires otherwise, the terms "Company," "we," and "our" refer to Western Alliance Bancorporation and its wholly-owned subsidiaries on a consolidated basis.
Forward-Looking Information
Certain statements contained in this Quarterly Report on Form 10-Q for the quarter ended June 30, 2017March 31, 2018 are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Exchange Act. The Company intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements. All statements other than statements of historical fact are “forward-looking statements” for purposes of federal and state securities laws, including statements that are related to or are dependent on estimates or assumptions relating to expectations, beliefs, projections, future plans and strategies, anticipated events or trends, and similar expressions concerning matters that are not historical facts.
The forward-looking statements contained in this Form 10-Q reflect the Company's current views about future events and financial performance and involve certain risks, uncertainties, assumptions, and changes in circumstances that may cause the Company's actual results to differ significantly from historical results and those expressed in any forward-looking statement, including those risks discussed under the heading “Risk Factors” in this Form 10-Q. Risks and uncertainties include those set forth in the Company's filings with the SEC and the following factors that could cause actual results to differ materially from those presented: 1) financial market and economic conditions adversely effecting financial performance; 2) dependency on real estate and events that negatively impact the real estate;estate market; 3) high concentration of commercial real estate and commercial and industrial loans; 4) actual credit losses may exceed expected losses in the loan portfolio; 5) recent changes to FASB accounting standards and the impact on the recognition of credit losses; 6) results of any tax audit findings, challenges to the Company's tax positions, or adverse changes or interpretations of tax laws; 7) the geographic concentrations of the Company's assets increase the risks related to local economic conditions; 6)8) exposure of financial instruments to certain market risks may increase the volatility of earnings and AOCI; 7)9) dependence on low-cost deposits; 8)10) ability to borrow from the FHLB or the FRB; 9)11) perpetration of fraud; 10)12) information security breaches; 11)13) reliance on third parties to provide key components of the Company's infrastructure; 12)14) a change in the Company's creditworthiness; 13)15) the Company's ability to implement and improve its controls and processes to keep pace with its growth; 14)16) expansion strategies may not be successful; 15)17) risks associated with new lines of businesses or new products and services within existing lines of business; 18) the Company's ability to compete in a highly competitive market; 16)19) the Company's ability to recruit and retain qualified employees and implement adequate succession planning to mitigate the loss of key members of its senior management team; 17)20) inadequate or ineffective risk management practices and internal controls and procedures; 18) risks associated with new lines of businesses or new products and services within existing lines of business; 19)21) the Company's ability to adapt to technological change; 20)22) exposure to natural and manmade disasters in markets that the Company operates; 21)23) risk of operating in a highly regulated industry and the Company's ability to remain in compliance; 22)24) failure to comply with state and federal banking agency laws and regulations; 23)25) changes in interest rates and increased rate competition; 24)26) exposure to environmental liabilities related to the properties to which the Company acquires title; and 25)27) risks related to ownership and price of the Company's common stock.
For more information regarding risks that may cause the Company's actual results to differ materially from any forward-looking statements, see “Risk Factors” in Item 1A of the Company's Annual Report on Form 10-K for the year ended December 31, 2016.

2017.
Financial Overview and Highlights
WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WAL provides a full spectrum of deposit, lending, treasury management, international banking, and online banking products and services through its wholly-owned banking subsidiary, WAB.
WAB operates the following full-service banking divisions: ABA, BON and FIB, Bridge, and TPB. The Company also serves business customers through a national platform of specialized financial services including AAB, Corporate Finance, Equity Fund Resources, HFF, Life Sciences Group, Mortgage Warehouse Lending, Public and Nonprofit Finance, Renewable Resource Group, Resort Finance, and Technology Finance.

Financial Result Highlights for the SecondFirst Quarter of 20172018
Net income of $80.0$100.9 million, compared to $61.6$73.3 million for the secondfirst quarter 20162017
Diluted earnings per share of $0.76,$0.96, compared to $0.60$0.70 per share for the secondfirst quarter 20162017
Total loans of $13.99$15.56 billion, up $781.6$466.5 million from December 31, 20162017
Total deposits of $16.03$17.35 billion, up $1.48 billion$382.0 million from December 31, 20162017
Net interest margin of 4.61%4.60% compared to 4.63% in the secondfirst quarter 20162017
Net operating revenue of $203.2$226.9 million constituting year-over-year growth of 18.0%19.9% or $31.0$37.7 million, and an increase in operating non-interest expenses of 13.17%12.5% or $10.2$11.0 million for the secondfirst quarter 201620171 
Operating PPNR of $115.2$127.6 million, up 22.0%26.4% from $94.5$100.9 million in the secondfirst quarter 201620171 
Efficiency ratio of 41.3%42.4% in the secondfirst quarter 2017,2018, compared to 45.2%44.0% in the secondfirst quarter 20162017
Operating efficiency ratio of 41.2%42.7% in the secondfirst quarter 2017,2018, compared to 43.0%44.4% in the secondfirst quarter 201620171
Nonperforming assets (nonaccrual loans and repossessed assets) decreased to 0.32%0.33% of total assets, from 0.54%0.44% at June 30, 2016March 31, 2017
Annualized net loan (recoveries) charge-offs to average loans outstanding of (0.03)%, compared to (0.01)%0.04% for the secondfirst quarter 20162018 and 2017
Tangible common equity ratio of 9.5%9.8%, compared to 9.1%9.4% at June 30, 2016March 31, 20171
Stockholders' equity of $2.06$2.29 billion, an increase of $262.5$64.1 million from June 30, 2016December 31, 2017
Book value per common share of $19.53,$21.67, an increase of 14.3%16.0% from $17.09$18.68 at June 30, 2016March 31, 2017
Tangible book value per share, net of tax, of $16.71,$18.86, an increase of 17.3%18.9% from $14.25$15.86 at June 30, 2016March 31, 20171
The impact to the Company from these items, and others of both a positive and negative nature, are discussed in more detail below as they pertain to the Company’s overall comparative performance for the three and six months ended June 30, 2017.March 31, 2018.
1 See Non-GAAP Financial Measures section beginning on page 63.62.




As a bank holding company, management focuses on key ratios in evaluating the Company's financial condition and results of operations.
Results of Operations and Financial Condition
A summary of the Company's results of operations, financial condition, and selected metrics are included in the following tables: 
Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
2017 2016 2017 2016 2018 2017
(in thousands, except per share amounts) (in thousands, except per share amounts)
Net income$79,971
 $61,614
 $153,328
 $122,946
Earnings per share - basic0.77
 0.60
 1.47
 1.20
Earnings per share - diluted0.76
 0.60
 1.46
 1.19
Net interest margin4.61% 4.63% 4.62% 4.60%
Net income available to common stockholders $100,900
 $73,342
Earnings per share available to common stockholders - basic 0.97
 0.71
Earnings per share available to common stockholders - diluted 0.96
 0.70
Return on average assets1.71
 1.55
 1.70
 1.62
 1.99% 1.69%
Return on average tangible common equity (1)18.42
 17.36
 18.14
 17.88
 20.46
 17.85
Net interest margin 4.60
 4.63
(1)See Non-GAAP Financial Measures section beginning on page 6262.
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Total assets $18,844,745
 $17,200,842
 $20,760,731
 $20,329,085
Loans, net of deferred loan fees and costs 13,989,995
 13,208,436
Total loans, net of deferred loan fees and costs 15,560,453
 15,093,935
Total deposits 16,031,113
 14,549,863
 17,354,538
 16,972,532
Asset Quality
For all banks and bank holding companies, asset quality plays a significant role in the overall financial condition of the institution and results of operations. The Company measures asset quality in terms of non-accrual loans as a percentage of gross loans and net charge-offs as a percentage of average loans. Net charge-offs are calculated as the difference between charged-off loans and recovery payments received on previously charged-off loans. The following table summarizes the Company's key asset quality metrics: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Non-accrual loans $30,071
 $40,272
 $37,297
 $43,925
Non-performing assets 109,301
 142,791
 111,294
 114,939
Non-accrual loans to gross loans 0.22 % 0.31% 0.24% 0.29%
Net (recoveries) charge-offs to average loans (1) (0.03) 0.02
Net charge-offs to average loans outstanding 0.04
 0.01
(1)Annualized for the three months ended June 30, 2017.March 31, 2018. Actual year-to-date for the year ended December 31, 2016.2017.
Asset and Deposit Growth
The Company’s assets and liabilities are comprised primarily of loans and deposits. Therefore, the ability to originate new loans and attract new deposits is fundamental to the Company’s growth. Total assets increased to $18.84$20.76 billion at June 30, 2017March 31, 2018 from $17.20$20.33 billion at December 31, 2016.2017. The increase in total assets of $1.64 billion,$431.6 million, or 9.6%2.1%, relates primarily to organic loan growth and an increaseof $466.5 million, which was partially offset by a decrease in cash and cash equivalents andAFS investment securities resulting from increased deposits.of $94.1 million. Total loans, including HFS loans increased by $781.6$466.5 million, or 5.9%3.1%, to $13.99$15.56 billion as of June 30, 2017,March 31, 2018, compared to $13.21$15.09 billion as of December 31, 2016.2017. The increase in loans during the quarter was driven by construction and land development loans of $325.3 million and commercial and industrial loans of $103.0 million. Total deposits increased $1.48 billion,$382.0 million, or 10.2%2.3%, to $16.03$17.35 billion as of June 30, 2017March 31, 2018 from $14.55$16.97 billion as of December 31, 2016.2017.

RESULTS OF OPERATIONS
The following table sets forth a summary financial overview for the comparable periods:  
Three Months ended June 30, Increase Six Months Ended June 30, Increase Three Months Ended March 31, Increase
2017 2016 (Decrease) 2017 2016 (Decrease) 2018 2017 (Decrease)
(in thousands, except per share amounts) (in thousands, except per share amounts)
Consolidated Income Statement Data:Consolidated Income Statement Data:    Consolidated Income Statement Data:
Interest income$206,953
 $174,089
 $32,864
 $399,218
 $328,345
 $70,873
 $234,697
 $192,265
 $42,432
Interest expense14,210
 10,403
 3,807
 27,166
 18,948
 8,218
 20,477
 12,956
 7,521
Net interest income192,743
 163,686
 29,057
 372,052
 309,397
 62,655
 214,220
 179,309
 34,911
Provision for credit losses3,000
 2,500
 500
 7,250
 5,000
 2,250
 6,000
 4,250
 1,750
Net interest income after provision for credit losses189,743
 161,186
 28,557
 364,802
 304,397
 60,405
 208,220
 175,059
 33,161
Non-interest income10,449
 8,559
 1,890
 20,993
 21,692
 (699) 11,643
 10,599
 1,044
Non-interest expense88,257
 81,804
 6,453
 176,014
 157,297
 18,717
 98,149
 87,827
 10,322
Income before income taxes111,935
 87,941
 23,994
 209,781
 168,792
 40,989
Income before provision for income taxes 121,714
 97,831
 23,883
Income tax expense31,964
 26,327
 5,637
 56,453
 45,846
 10,607
 20,814
 24,489
 (3,675)
Net income$79,971
 $61,614
 $18,357
 $153,328
 $122,946
 $30,382
 $100,900
 $73,342
 $27,558
Earnings per share - basic$0.77
 $0.60
 $0.17
 $1.47
 $1.20
 $0.27
Earnings per share - diluted$0.76
 $0.60
 $0.16
 $1.46
 $1.19
 $0.27
Earnings per share available to common stockholders - basic $0.97
 $0.71
 $0.26
Earnings per share available to common stockholders - diluted $0.96
 $0.70
 $0.26
Non-GAAP Financial Measures
The following discussion and analysis contains financial information determined by methods other than those prescribed by GAAP. The Company's management uses these non-GAAP financial measures in their analysis of the Company's performance. These measurements typically adjust GAAP performance measures to exclude the effects of certain significant activities or transactions that, in management's opinion, do not reflect recurring period-to-period comparisons of the Company's performance. Management believes presentation of these non-GAAP financial measures provides useful supplemental information that is essential to a complete understanding of the operating results of the Company's core businesses. Since the presentation of these non-GAAP performance measures and their impact differ between companies, these non-GAAP disclosures should not be viewed as a substitute for operating results determined in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies.
Operating Pre-Provision Net Revenue
Operating PPNR is defined by the Federal Reserve in SR 14-3, which requires companies subject to the rule to project PPNR over the planning horizon for each of the economic scenarios defined annually by the regulators. Banking regulations define PPNR as net interest income plus non-interest income less non-interest expense. Management has further adjusted this metric to exclude any non-recurring or non-operational elements of non-interest income or non-interest expense, which are outlined in the table below. Management feels that this is an important metric as it illustrates the underlying performance of the Company, it enables investors and others to assess the Company's ability to generate capital to cover credit losses through the credit cycle, and provides consistent reporting with a key metric used by bank regulatory agencies.

The following table shows the components of operating PPNR for the three and six months ended June 30, 2017March 31, 2018 and 2016:2017:
Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
2017 2016 2017 2016 2018 2017
(in thousands) (in thousands)
Total non-interest income$10,449
 $8,559
 $20,993
 $21,692
 $11,643
 $10,599
Less:           
(Loss) gain on sales of investment securities, net (1)(47) 
 588
 1,001
Unrealized gains (losses) on assets and liabilities measured at fair value, net (1)11
 6
 25
 (1)
Gain (loss) on sales of investment securities, net (1) 
 635
Unrealized (losses) gains on assets measured at fair value, net (1) (1,074) (1)
Total operating non-interest income10,485
 8,553
 20,380
 20,692
 12,717
 9,965
Plus: net interest income192,743
 163,686
 372,052
 309,397
 214,220
 179,309
Net operating revenue$203,228
 $172,239
 $392,432
 $330,089
 $226,937
 $189,274
Total non-interest expense$88,257
 $81,804
 $176,014
 $157,297
 $98,149
 $87,827
Less:           
Net loss (gain) on sales / valuations of repossessed and other assets (1)231
 357
 (312) 55
Acquisition / restructure expense (1)
 3,662
 
 3,662
Net (gain) loss on sales / valuations of repossessed and other assets (1) (1,228) (543)
Total operating non-interest expense$88,026
 $77,785
 $176,326
 $153,580
 $99,377
 $88,370
Operating pre-provision net revenue (2)$115,202
 $94,454
 $216,106
 $176,509
 $127,560
 $100,904
Plus:           
Non-operating revenue adjustments(36) 6
 613
 1,000
 (1,074) 634
Less:           
Provision for credit losses3,000
 2,500
 7,250
 5,000
 6,000
 4,250
Non-operating expense adjustments231
 4,019
 (312) 3,717
 (1,228) (543)
Income before provision for income taxes111,935
 87,941
 209,781
 168,792
 121,714
 97,831
Income tax expense31,964
 26,327
 56,453
 45,846
 20,814
 24,489
Net income$79,971
 $61,614
 $153,328
 $122,946
 $100,900
 $73,342
(1)The operating PPNR non-GAAP performance metric is adjusted to exclude the effects of this non-operational item.
(2)There were no adjustments made for non-recurring items during the three and six months ended June 30, 2017March 31, 2018 and 2016.2017.

Tangible Common Equity
The following table presents financial measures related to tangible common equity. Tangible common equity represents total stockholders' equity, less identifiable intangible assets and goodwill. Management believes that tangible common equity financial measures are useful in evaluating the Company's capital strength, financial condition, and ability to manage potential losses. In addition, management believes that these measures improve comparability to other institutions that have not engaged in acquisitions that resulted in recorded goodwill and other intangible assets.
June 30, 2017 December 31, 2016March 31, 2018 December 31, 2017
(dollars and shares in thousands)(dollars and shares in thousands)
Total stockholders' equity$2,058,674
 $1,891,529
$2,293,763
 $2,229,698
Less: goodwill and intangible assets301,645
 302,894
300,350
 300,748
Total tangible stockholders' equity1,757,029
 1,588,635
1,993,413
 1,928,950
Plus: deferred tax - attributed to intangible assets4,550
 4,949
2,773
 2,698
Total tangible common equity, net of tax$1,761,579
 $1,593,584
$1,996,186
 $1,931,648
      
Total assets$18,844,745
 $17,200,842
$20,760,731
 $20,329,085
Less: goodwill and intangible assets, net301,645
 302,894
300,350
 300,748
Tangible assets18,543,100
 16,897,948
20,460,381
 20,028,337
Plus: deferred tax - attributed to intangible assets4,550
 4,949
2,773
 2,698
Total tangible assets, net of tax$18,547,650
 $16,902,897
$20,463,154
 $20,031,035
      
Tangible equity ratio9.5% 9.4%9.7% 9.6%
Tangible common equity ratio9.5
 9.4
9.8
 9.6
Common shares outstanding105,429
 105,071
105,861
 105,487
Book value per share$21.67
 $21.14
Tangible book value per share, net of tax$16.71
 $15.17
18.86
 18.31
Operating Efficiency Ratio
The following table shows the components used in the calculation of the operating efficiency ratio, which management uses as a metric for assessing cost efficiency:
Three Months ended June 30, Six Months Ended June 30,Three Months Ended March 31,
2017 2016 2017 20162018 2017
(dollars in thousands)(dollars in thousands)
Total non-interest expense$88,257
 $81,804
 $176,014
 $157,297
Non-operating expense adjustments(231) (4,019) 312
 (3,717)
Total operating non-interest expense$88,026
 $77,785
 $176,326
 $153,580
$99,377
 $88,370
          
Divided by:          
Total net interest income$192,743
 $163,686
 $372,052
 $309,397
$214,220
 $179,309
Plus:          
Tax equivalent interest adjustment10,453
 8,704
 20,129
 17,138
5,727
 9,676
Non-interest income10,449
 8,559
 20,993
 21,692
Net revenue - TEB$213,645
 $180,949
 $413,174
 $348,227
Non-operating revenue adjustments36
 (6) (613) (1,000)
Operating non-interest income12,717
 9,965
Net operating revenue - TEB$213,681
 $180,943
 $412,561
 $347,227
$232,664
 $198,950
          
Efficiency ratio - TEB41.3% 45.2% 42.6% 45.2%
Operating efficiency ratio - TEB41.2
 43.0
 42.7
 44.2
42.7% 44.4%
Operating efficiency ratio - TEB adjusted (1)41.7%  

(1)The current period operating efficiency ratio was adjusted to exclude the effects from the TCJA of the lower statutory corporate federal tax rate on the calculation of the tax equivalent adjustment in order to be comparable to the prior period.


Regulatory Capital
The following table presents certain financial measures related to regulatory capital under Basel III, which includes Common Equity Tier 1 and total capital. The FRB and other banking regulators use Common Equity Tier 1 and total capital as a basis for assessing a bank's capital adequacy; therefore, management believes it is useful to assess financial condition and capital adequacy using this same basis. Specifically, the total capital ratio takes into consideration the risk levels of assets and off-balance sheet financial instruments. In addition, management believes that the classified assets to Common Equity Tier 1 plus allowance measure is an important regulatory metric for assessing asset quality.
June 30, 2017 December 31, 2016March 31, 2018 December 31, 2017
(dollars in thousands)(dollars in thousands)
Common Equity Tier 1:      
Common Equity$2,058,674
 $1,891,529
$2,293,763
 $2,229,698
Less:      
Non-qualifying goodwill and intangibles295,655
 294,754
297,577
 296,421
Disallowed deferred tax asset1,060
 1,400
832
 638
AOCI related adjustments(147) (13,460)(50,868) (9,496)
Unrealized gain on changes in fair value liabilities8,092
 8,118
13,269
 7,785
Common Equity Tier 1 (regulatory)$1,754,014
 $1,600,717
Divided by: Risk-weighted assets (regulatory)$16,992,251
 $15,980,092
Common Equity Tier 1$2,032,953
 $1,934,350
Divided by: Risk-weighted assets$19,425,630
 $18,569,608
Common Equity Tier 1 ratio10.3% 10.0%10.5% 10.4%
      
Common Equity Tier 1 (regulatory)$1,754,014
 $1,600,717
Common Equity Tier 1$2,032,953
 $1,934,350
Plus:      
Trust preferred securities81,500
 81,500
81,500
 81,500
Less:      
Disallowed deferred tax asset265
 934

 159
Unrealized gain on changes in fair value liabilities2,023
 5,412

 1,947
Tier 1 capital$1,833,226
 $1,675,871
$2,114,453
 $2,013,744
Divided by: Tangible average assets$18,436,948
 $16,868,674
$20,057,003
 $19,624,517
Tier 1 leverage ratio9.9% 9.9%10.5% 10.3%
      
Total Capital:      
Tier 1 capital (regulatory)$1,833,226
 $1,675,871
Tier 1 capital$2,114,453
 $2,013,744
Plus:      
Subordinated debt298,637
 299,927
301,244
 301,020
Qualifying allowance for credit losses131,811
 124,704
144,659
 140,050
Other5,851
 6,978
7,183
 6,174
Less: Tier 2 qualifying capital deductions
 

 
Tier 2 capital$436,299
 $431,609
$453,086
 $447,244
      
Total capital$2,269,525
 $2,107,480
$2,567,539
 $2,460,988
      
Total capital ratio13.4% 13.2%13.2% 13.3%
      
Classified assets to Tier 1 capital plus allowance for credit losses:      
Classified assets$249,491
 $211,782
$213,482
 $222,004
Divided by:      
Tier 1 capital1,833,226
 1,675,871
2,114,453
 2,013,744
Plus: Allowance for credit losses131,811
 124,704
144,659
 140,050
Total Tier 1 capital plus allowance for credit losses$1,965,037
 $1,800,575
$2,259,112
 $2,153,794
      
Classified assets to Tier 1 capital plus allowance12.7% 11.8%9.4% 10.3%

Net Interest Margin
The net interest margin is reported on a TEB. A tax equivalent adjustment is added to reflect interest earned on certain securities and loans that are exempt from federal and state income tax. The following tables set forth the average balances, interest income, interest expense, and average yield (on a fully TEB) for the periods indicated:
 Three Months Ended June 30, Three Months Ended March 31,
 2017 2016 2018 2017
 Average
Balance
 Interest Average
Yield / Cost
 Average
Balance
 Interest Average
Yield / Cost
 Average
Balance
 Interest Average
Yield / Cost
 Average
Balance
 Interest Average
Yield / Cost
 (dollars in thousands) (dollars in thousands)
Interest-earning assets            
Interest earning assets            
Loans:                       ��
Commercial and industrial $6,054,351
 $75,857
 5.52% $5,365,035
 $63,621
 5.24% $6,580,935
 $85,547
 5.38% $5,756,934
 $68,474
 5.16%
Commercial real estate 5,626,274
 78,347
 5.57
 5,270,319
 73,167
 5.55
CRE - non-owner occupied 3,920,777
 56,285
 5.76
 3,550,331
 53,735
 6.07
CRE - owner-occupied 2,241,787
 28,551
 5.21
 1,997,977
 24,726
 5.14
Construction and land development 1,605,614
 24,965
 6.22
 1,293,659
 19,094
 5.90
 1,789,356
 29,619
 6.63
 1,510,781
 22,102
 5.86
Residential real estate 322,205
 3,950
 4.90
 299,849
 3,383
 4.51
 425,267
 5,280
 4.97
 271,867
 3,023
 4.45
Consumer 44,681
 395
 3.54
 35,679
 428
 4.80
 47,935
 677
 5.65
 38,494
 493
 5.12
Loans held for sale 17,255
 143
 3.31
 22,762
 322
 5.66
Total loans (1), (2), (3) 13,670,380
 183,657
 5.60
 12,287,303
 160,015
 5.43
 15,006,057
 205,959
 5.59
 13,126,384
 172,553
 5.47
Securities:                        
Securities - taxable 2,446,546
 14,847
 2.43
 1,547,833
 8,514
 2.20
 2,875,345
 19,149
 2.66
 2,105,190
 12,437
 2.36
Securities - tax-exempt 627,960
 5,782
 5.48
 469,637
 4,357
 5.44
 836,914
 7,472
 4.47
 604,300
 5,677
 5.57
Total securities (1) 3,074,506
 20,629
 3.05
 2,017,470
 12,871
 2.95
 3,712,259
 26,621
 3.07
 2,709,490
 18,114
 3.08
Other 903,269
 2,667
 1.18
 597,542
 1,203
 0.81
 425,667
 2,117
 1.99
 482,029
 1,598
 1.33
Total interest-earning assets 17,648,155
 206,953
 4.93
 14,902,315
 174,089
 4.91
Total interest earning assets 19,143,983
 234,697
 5.02
 16,317,903
 192,265
 4.95
Non-interest earning assets                        
Cash and due from banks 140,302
     134,174
     142,356
     142,713
    
Allowance for credit losses (129,979)     (120,373)     (141,030)     (125,727)    
Bank owned life insurance 165,793
     163,694
     168,070
     164,835
    
Other assets 919,641
     832,648
     990,845
     900,543
    
Total assets $18,743,912
     $15,912,458
     $20,304,224
     $17,400,267
    
Interest-bearing liabilities                        
Interest-bearing deposits:                        
Interest-bearing transaction accounts $1,492,700
 $986
 0.26% $1,194,171
 $504
 0.17% $1,654,720
 $1,380
 0.33% $1,434,826
 $805
 0.22%
Savings and money market accounts 6,155,832
 5,831
 0.38
 5,837,403
 4,978
 0.34
 6,226,611
 8,915
 0.57
 6,068,997
 5,312
 0.35
Time certificates of deposit 1,575,969
 2,828
 0.72
 1,757,158
 2,196
 0.50
 1,579,940
 3,878
 0.98
 1,484,868
 2,295
 0.62
Total interest-bearing deposits 9,224,501
 9,645
 0.42
 8,788,732
 7,678
 0.35
 9,461,271
 14,173
 0.60
 8,988,691
 8,412
 0.37
Short-term borrowings 34,556
 72
 0.83
 153,063
 211
 0.55
 351,616
 1,335
 1.52
 110,892
 206
 0.74
Qualifying debt 359,282
 4,493
 5.00
 227,510
 2,514
 4.42
 368,849
 4,969
 5.39
 354,087
 4,338
 4.90
Total interest-bearing liabilities 9,618,339
 14,210
 0.59
 9,169,305
 10,403
 0.45
 10,181,736
 20,477
 0.80
 9,453,670
 12,956
 0.55
Non-interest-bearing liabilities                        
Non-interest-bearing demand deposits 6,735,358
     4,772,582
     7,510,614
     5,719,169
    
Other liabilities 351,713
     246,742
     338,530
     280,595
    
Stockholders’ equity 2,038,502
     1,723,829
     2,273,344
     1,946,833
    
Total liabilities and stockholders' equity $18,743,912
     $15,912,458
     $20,304,224
     $17,400,267
    
Net interest income and margin (4)   $192,743
 4.61%   $163,686
 4.63%   $214,220
 4.60%   $179,309
 4.63%
Net interest margin (5)     4.72%      
(1)Yields on loans and securities have been adjusted to a TEB. The taxable-equivalent adjustment was $10.4$5.7 million and $8.7$9.7 million for the three months ended June 30,March 31, 2018 and 2017, and 2016, respectively.
(2)Included in the yield computation are net loan fees of $10.0 million and accretion on acquired loans of $7.1$5.7 million for the three months ended June 30, 2017,March 31, 2018, compared to $6.5$6.9 million and $8.2$6.4 million for the three months ended June 30, 2016,March 31, 2017, respectively.
(3)Includes non-accrual loans.
(4)Net interest margin is computed by dividing net interest income by total average earning assets.


  Six Months Ended June 30,
  2017 2016
  Average
Balance
 Interest Average
Yield / Cost
 Average
Balance
 Interest Average
Yield / Cost
  (dollars in thousands)
Interest-earning assets            
Loans:            
Commercial and industrial $5,904,870
 $144,260
 5.38% $5,262,789
 $124,546
 5.24%
Commercial real estate 5,579,767
 156,579
 5.61
 4,802,066
 130,306
 5.43
Construction and land development 1,558,460
 47,067
 6.04
 1,229,881
 36,589
 5.95
Residential real estate 297,175
 6,974
 4.69
 305,680
 6,891
 4.51
Consumer 41,604
 888
 4.27
 32,251
 794
 4.92
Loans held for sale 18,009
 442
 4.91
 23,452
 675
 5.76
Total loans (1), (2), (3) 13,399,885
 356,210
 5.53
 11,656,119
 299,801
 5.37
Securities:            
Securities - taxable 2,276,811
 27,285
 2.40
 1,558,093
 17,851
 2.29
Securities - tax-exempt 616,195
 11,458
 5.52
 462,183
 8,528
 5.33
Total securities (1) 2,893,006
 38,743
 3.06
 2,020,276
 26,379
 2.99
Other 693,813
 4,265
 1.23
 507,521
 2,165
 0.85
Total interest-earning assets 16,986,704
 399,218
 4.94
 14,183,916
 328,345
 4.87
Non-interest earning assets            
Cash and due from banks 141,501
     137,462
    
Allowance for credit losses (127,865)     (120,953)    
Bank owned life insurance 165,316
     163,238
    
Other assets 910,145
     827,638
    
Total assets $18,075,801
     $15,191,301
    
Interest-bearing liabilities            
Interest-bearing deposits:            
Interest-bearing transaction accounts $1,463,923
 $1,791
 0.24% $1,143,028
 $959
 0.17%
Savings and money market accounts 6,112,654
 11,143
 0.36
 5,585,654
 9,012
 0.32
Time certificates of deposit 1,530,670
 5,123
 0.67
 1,659,327
 3,950
 0.48
Total interest-bearing deposits 9,107,247
 18,057
 0.40
 8,388,009
 13,921
 0.33
Short-term borrowings 72,513
 278
 0.77
 102,942
 329
 0.64
Qualifying debt 356,699
 8,831
 4.95
 213,474
 4,698
 4.40
Total interest-bearing liabilities 9,536,459
 27,166
 0.57
 8,704,425
 18,948
 0.44
Non-interest-bearing liabilities            
Non-interest-bearing demand deposits 6,230,071
     4,561,357
    
Other liabilities 316,350
     245,614
    
Stockholders’ equity 1,992,921
     1,679,905
    
Total liabilities and stockholders' equity $18,075,801
     $15,191,301
    
Net interest income and margin (4)   $372,052
 4.62%   $309,397
 4.60%
(1)(5)Yields on loans and securities have been adjusted to a TEB. The taxable-equivalent adjustment was $20.1 million and $17.1 million for the six months ended June 30, 2017 and 2016, respectively.
(2)Included in the yield computation areCurrent period net loan fees of $16.6 million and accretion on acquired loans of $13.5 million for the six months ended June 30, 2017, compared to $13.0 million and $13.5 million for the six months ended June 30, 2016, respectively.
(3)Includes non-accrual loans.
(4)Net interest margin is computed by dividing net interest income by total average earning assets.adjusted to exclude the effects from the TCJA of the lower statutory corporate federal tax rate on the calculation of the tax equivalent adjustment in order to be comparable to the prior period.


 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 versus 2016 2017 versus 2016 2018 versus 2017
 Increase (Decrease) Due to Changes in (1) Increase (Decrease) Due to Changes in (1) Increase (Decrease) Due to Changes in (1)
 Volume Rate Total Volume Rate Total Volume Rate Total
       (in thousands)      
Interest income:                  
Loans:                  
Commercial and industrial $8,637
 $3,599
 $12,236
 $15,686
 $4,028
 $19,714
 $10,711
 $6,362
 $17,073
Commercial real estate 4,957
 223
 5,180
 21,824
 4,449
 26,273
CRE - non-owner occupied 5,318
 (2,768) 2,550
CRE - owner-occupied 3,105
 720
 3,825
Construction and land development 4,850
 1,021
 5,871
 9,923
 555
 10,478
 4,611
 2,906
 7,517
Residential real estate 274
 293
 567
 (200) 283
 83
 1,905
 352
 2,257
Consumer 80
 (113) (33) 200
 (106) 94
 133
 51
 184
Loans held for sale (46) (133) (179) (134) (99) (233)
Total loans 18,752
 4,890
 23,642
 47,299
 9,110
 56,409
 25,783
 7,623
 33,406
Securities:                  
Securities - taxable 5,454
 879
 6,333
 8,613
 821
 9,434
 5,129
 1,583
 6,712
Securities - tax-exempt 1,458
 (33) 1,425
 2,864
 66
 2,930
 2,077
 (282) 1,795
Total securities 6,912
 846
 7,758
 11,477
 887
 12,364
 7,206
 1,301
 8,507
Other 903
 561
 1,464
 1,145
 955
 2,100
 (280) 799
 519
Total interest income 26,567
 6,297
 32,864
 59,921
 10,952
 70,873
 32,709
 9,723
 42,432
                  
Interest expense:                  
Interest bearing transaction accounts $197
 $285
 $482
 $393
 $439
 $832
 $183
 $392
 $575
Savings and money market 302
 551
 853
 961
 1,170
 2,131
 226
 3,377
 3,603
Time certificates of deposit (325) 957
 632
 (431) 1,604
 1,173
 233
 1,350
 1,583
Short-term borrowings (247) 108
 (139) (117) 66
 (51) 914
 215
 1,129
Qualifying debt 1,648
 331
 1,979
 3,546
 587
 4,133
 199
 432
 631
Total interest expense 1,575
 2,232
 3,807
 4,352
 3,866
 8,218
 1,755
 5,766
 7,521
                  
Net increase $24,992
 $4,065
 $29,057
 $55,569
 $7,086
 $62,655
 $30,954
 $3,957
 $34,911
 
(1)Changes due to both volume and rate have been allocated to volume changes.
Comparison of interest income, interest expense and net interest margin
The Company's primary source of revenue is interest income. For the three months ended June 30, 2017,March 31, 2018, interest income was $207.0$234.7 million, an increase of $32.9$42.4 million, or 18.9%22.1%, compared to $174.1$192.3 million for the three months ended June 30, 2016.March 31, 2017. This increase was primarily the result of a $1.38$1.88 billion increase in the average loan balance which, together with the effect of the rising rate environment, drove a $23.6$33.4 million increase in loan interest income for the three months ended June 30, 2017. The acquisition of the HFF loan portfolio on April 20, 2016 contributed $259.1 million to the increase in the Company's average loan balance and also contributed $3.6 million to the increase in loan interest income as the full quarter effect of the acquisition was reflected in the current period.March 31, 2018. Interest income from investment securities increased by $7.8$8.5 million for the comparable period primarily due to an increase in the average investment balance of $1.06$1.00 billion from June 30, 2016March 31, 2017 as well as an increase in interest rates.rates and mix. Average yield on interest earning assets increased to 4.93%5.02% for the three months ended June 30, 2017,March 31, 2018, compared to 4.91%4.95% for the same period in 2016,2017, which was primarily the result of increased yields on loans and investment securities, attributable to the rising interest rate environment.
For the six months ended June 30, 2017, interest income was $399.2 million, an increase of $70.9 million, or 21.6%, compared to $328.3 million for the six months ended June 30, 2016. This increase was primarily the result of a $1.74 billion increase in the average loan balance which, together, with the effect of the rising rate environment, drove a $56.4 million increase in loan interest income for the six months ended June 30, 2017. The acquisition of the HFF loan portfolio on April 20, 2016 contributed $773.4 million to the increase in the Company's average loan balance and also contributed $25.2 million to the increase in loan interest income as the full year-to-date effect of the acquisition was reflected in 2017. The remaining increase in the Company's loan balance from the prior year is attributable to organic loan growth. Interest income from investment securities increased by $12.4 million for the comparable period primarily due to an increase in the average investment balance of $872.7 million from June 30, 2016 as well an increase in interest rates. Average yield on interest earning assets increased to 4.94% for the six months ended June 30, 2017, compared to 4.87% for the same period in 2016, which was primarily the result

of increased yields on loans and investment securities resulting from rising interest rates during the six months ended June 30, 2017.
For the three months ended June 30, 2017,March 31, 2018, interest expense was $14.2$20.5 million, compared to $10.4$13.0 million for the three months ended June 30, 2016.March 31, 2017. Interest expense on deposits increased $2.0$5.8 million for the same period as average interest-bearing deposits increased $435.8$472.6 million which isand customer concessions on rates for certain deposit relationships were made, resulting in a 723 basis point increase in average cost of interest bearing deposits. Interest expense on qualifying debtshort-term borrowings increased by $2.0$1.1 million as a result of a $131.8 million increase in average qualifying debt for the three months ended June 30, 2017March 31, 2018 compared to the same period in 2016.
For the six months ended June 30, 2017, interest expense was $27.22017. The increase is attributable to an increase average short-term borrowings of $240.7 million compareddue to $18.9 million for the six months ended June 30, 2016. Interest expense on deposits increased $4.1 million for the same period as average interest-bearing deposits increased $719.2 million, which is a 7 basis point increase in average costutilization of interest bearing deposits. Interest expense on qualifying debt increased by $4.1 million as a result of a $143.2 million increase in average qualifying debt for the six months ended June 30, 2017 compared to the same period in 2016.FHLB overnight advances.
For the three months ended June 30, 2017,March 31, 2018, net interest income was $192.7$214.2 million, compared to $163.7$179.3 million for the three months ended June 30, 2016.March 31, 2017. The increase in net interest income reflects a $2.75$2.83 billion increase in average interest-earning assets, offset by a $449.0$728.1 million increase in average interest-bearing liabilities. The decrease in net interest margin of 23 basis

points is the result of an increasehigher deposit and funding costs and a decrease in the cost of interest-bearing deposits and interest expense resulting from the issuance of long-term subordinated debt in June 2016 as the full quarter effect was realized in 2017. These decreases were partially offset by higher yieldstax equivalent adjustment on tax-exempt loans and securities infor the current period.
For the sixthree months ended June 30, 2017, net interest income was $372.1 million, compared to $309.4 million for the six months ended June 30, 2016. The increase in net interest income reflects a $2.80 billion increase in average interest-earning assets, offset by a $832.0 million increase in average interest-bearing liabilities. The increase in net interest margin of 2 basis pointsMarch 31, 2018, compared to the same period in 2016 is2017, which resulted from the result ofTCJA. These decreases to net interest margin were partially offset by an increase in average yield on loans and securities due to the rising interest rate environment, partially offset by higher deposit and funding costs.environment. Adjusting net interest margin to exclude the effects of the TCJA, would in net interest margin of 4.72% for the three months ended March 31, 2018.
Provision for Credit Losses
The provision for credit losses in each period is reflected as a reduction in earnings for that period. The provision is equal to the amount required to maintain the allowance for credit losses at a level that is adequate to absorb probable credit losses inherent in the loan portfolio. For the three months ended June 30, 2017,March 31, 2018, the provision for credit losses was $3.0$6.0 million compared to $2.5$4.3 million for the three months ended June 30, 2016. For the six months ended June 30, 2017, the provision for credit losses was $7.3 million, compared to $5.0 million for the six months ended June 30, 2016.March 31, 2017. The provision increase was primarily due to an increaseorganic growth in total organic loans of $466.5 millionduring the three and six months ended June 30, 2017.March 31, 2018. The Company defines its organic loans as those loans that have not been acquired in a transaction accounted for as a business combination. The Company may establish an additional allowance for credit losses for PCI loans through provision for credit losses when impairment is determined as a result of lower than expected cash flows. As of June 30, 2017March 31, 2018 and December 31, 2016,2017, the allowance for credit losses on PCI loans was $1.7$0.8 million and $1.8$1.6 million, respectively.
Non-interest Income
The following table presents a summary of non-interest income for the periods presented: 
 Three Months ended June 30, Six Months Ended June 30, Three Months Ended March 31,
 2017 2016 Increase (Decrease) 2017 2016 Increase (Decrease) 2018 2017 Increase (Decrease)
 (in thousands) (in thousands)
Service charges and fees $5,203
 $4,544
 $659
 $9,941
 $9,043
 $898
 $5,745
 $4,738
 $1,007
Card income 1,380
 1,274
 106
 2,802
 2,464
 338
 1,972
 1,492
 480
Income from equity investments 1,291
 59
 1,232
 1,983
 401
 1,582
 1,460
 692
 768
Income from bank owned life insurance 973
 1,029
 (56) 1,921
 1,959
 (38)
Foreign currency income 832
 842
 (10) 1,874
 1,783
 91
 1,202
 1,042
 160
Lending related income and gains (losses) on sale of loans, net 227
 194
 33
 649
 3,801
 (3,152) 978
 422
 556
(Loss) gain on sales of investment securities, net (47) 
 (47) 588
 1,001
 (413)
Income from bank owned life insurance 928
 948
 (20)
Gain (loss) on sales of investment securities, net 
 635
 (635)
Unrealized (losses) gains on assets measured at fair value, net (1,074) (1) (1,073)
Other income 590
 617
 (27) 1,235
 1,240
 (5) 432
 631
 (199)
Total non-interest income $10,449
 $8,559
 $1,890
 $20,993
 $21,692
 $(699) $11,643
 $10,599
 $1,044
Total non-interest income for the three months ended June 30, 2017March 31, 2018 compared to the same period in 2016,2017, increased by $1.9$1.0 million, or 22.1%9.8%. The increase in non-interest income is due primarily to an increase in service charges and fees and income from equity investments.
Total non-interest income for the six months ended June 30, 2017 compared The increase in service charges and fees is due to the same periodcontinued growth in 2016, decreasedthe Company's deposit base, which increased $2.00 billion from March 31, 2017. The increase in income from equity investments is attributable to an increase in warrant income. These increases were partially offset by $0.7 million, or 3.2%. The decreaseunrealized losses on assets measured at fair value, which relate to unrealized losses on the Company's equity securities. Due to adoption of ASU 2016-01, effective January 1, 2018, changes in non-interestthe fair value of equity securities are recognized in net income is due primarily to a decrease in lending relatedrather than accumulated other comprehensive income. Lending related income decreased $1.0 million as a result of decreased SBA income and total non-recurring net gains on sale of loans was $2.0 million for the six months ended June 30, 2016, compared to less than $0.1 million for the six months ended June 30, 2017.

Non-interest Expense
The following table presents a summary of non-interest expense for the periods presented:
Three Months ended June 30, Six Months Ended June 30,Three Months Ended March 31,
2017 2016 Increase (Decrease) 2017 2016 Increase (Decrease)2018 2017 Increase (Decrease)
(in thousands)(in thousands)
Salaries and employee benefits$52,246
 $44,711
 $7,535
 $103,866
 $89,566
 $14,300
$62,133
 $51,620
 $10,513
Occupancy6,864
 6,894
 (30)
Legal, professional, and directors' fees8,483
 5,747
 2,736
 17,286
 11,319
 5,967
6,003
 8,803
 (2,800)
Occupancy6,927
 7,246
 (319) 13,821
 13,503
 318
Data processing4,396
 5,114
 (718) 9,667
 9,175
 492
5,207
 5,264
 (57)
Insurance3,589
 2,963
 626
 6,817
 6,286
 531
3,869
 3,228
 641
Deposit costs2,133
 986
 1,147
 3,874
 1,758
 2,116
2,926
 1,741
 1,185
Business development1,728
 2,063
 (335)
Card expense942
 731
 211
Marketing1,131
 1,097
 34
 1,852
 1,754
 98
596
 721
 (125)
Loan and repossessed asset expenses1,098
 832
 266
 2,376
 1,734
 642
583
 1,278
 (695)
Card expense704
 824
 (120) 1,358
 1,711
 (353)
Intangible amortization488
 697
 (209) 1,177
 1,394
 (217)398
 689
 (291)
Net loss (gain) on sales / valuations of repossessed and other assets231
 357
 (126) (312) 55
 (367)
Acquisition / restructure expense
 3,662
 (3,662) 
 3,662
 (3,662)
Net (gain) loss on sales / valuations of repossessed and other assets(1,228) (543) (685)
Other expense6,831
 7,568
 (737) 14,232
 15,380
 (1,148)8,128
 5,338
 2,790
Total non-interest expense$88,257
 $81,804
 $6,453
 $176,014
 $157,297
 $18,717
$98,149
 $87,827
 $10,322
Total non-interest expense for the three months ended June 30, 2017,March 31, 2018, compared to the same period in 2016,2017, increased $6.5$10.3 million, or 7.9%11.8%. This increase primarily relates to salaries and employee benefits, deposit costs, and legal, professional, and directors' fees.other expense. Salaries and employee benefits and legal, professional, and directors' fees have increased as the Company continues to build out its infrastructure to supportsupports its continued growth. These increases were offset bygrowth, with a $3.7 millioncorresponding decrease in acquisition / restructure expense related to the HFF acquisition and restructure costs for the system conversion that occurred in the fourth quarter of 2016.
Total non-interest expense for the six months ended June 30,professional costs. Full-time equivalent employees increased 9.8% from 1,560 at March 31, 2017, compared to the same period in 2016, increased $18.7 million, or 11.9%. This increase primarily relates to salaries and employee benefits, legal, professional, and directors' fees, and deposit costs. The explanation for the increase in salaries and employee benefits and legal, professional, and directors' fees for the six months ended June 30, 2017 compared to the same period in 2016 is the same as the explanation for the three months ended June 30, 2017 compared to the same period in 2016.1,713 at March 31, 2018. Deposits costs consist of fees to Promontory and others for reciprocal deposits as well as earnings credits on select non-interest bearing deposits. The increase in deposit costs for the sixthree months ended June 30, 2017,March 31, 2018, compared to the same period in 20162017 primarily relates to an increase in deposit earnings credits paid to account holders. The increase to other expense is primarily related to a $1.6 million increase in the reserve for unfunded commitments and letters of credit. These increases were partially offset by a decrease in legal, professional, and directors' fees of $2.8 million for the three months ended March 31, 2018 due to a decrease in consulting costs, compared to the same period in 2017.
Income Taxes
The effective tax rate for the sixthree months ended June 30, 2017March 31, 2018 was 26.91%17.10%, compared to 27.16%25.03% for the sixthree months ended June 30, 2016.March 31, 2017. The decrease in the effective tax rate is due primarily to the decrease in the Federal statutory rate effective in 2018.

Business Segment Results
The Company's reportable segments are aggregated primarily based on geographic location, services offered, and markets served. The Company's regional segments, which include Arizona, Nevada, Southern California, and Northern California, provide full service banking and related services to their respective markets. The Company's NBL segments, which include HOA Services, Public & Nonprofit Finance, Technology & Innovation, HFF, and Other NBLs, provide specialized banking services to niche markets. These NBLs are managed centrally and are broader in geographic scope than the Company's other segments, though still predominately located within the Company's core market areas. The Corporate & Other segment consists of corporate-related items, income and expense items not allocated to the Company's other reportable segments, and inter-segment eliminations.
The following tables present selected operating segment information for the periods presented:
   Regional Segments   Regional Segments
 Consolidated Company Arizona Nevada Southern California Northern California Consolidated Company Arizona Nevada Southern California Northern California
At June 30, 2017 (in millions)
At March 31, 2018 (in millions)
Loans, net of deferred loan fees and costs $13,989.9
 $3,089.9
 $1,729.3
 $1,838.4
 $1,172.5
 $15,560.4
 $3,472.7
 $1,819.6
 $2,013.6
 $1,271.4
Deposits 16,031.1
 4,778.5
 3,925.3
 2,251.6
 1,547.8
 17,354.5
 5,020.6
 3,648.1
 2,423.8
 1,814.4
                    
At December 31, 2016          
At December 31, 2017          
Loans, net of deferred loan fees and costs $13,208.5
 $2,955.9
 $1,725.5
 $1,766.8
 $1,095.4
 $15,093.9
 $3,323.7
 $1,844.8
 $1,934.7
 $1,275.5
Deposits 14,549.8
 3,843.4
 3,731.5
 2,382.6
 1,543.6
 16,972.5
 4,841.3
 3,951.4
 2,461.1
 1,681.7
 (in thousands) (in thousands)
Three Months Ended June 30, 2017:          
Three Months Ended March 31, 2018:          
Income (loss) before income taxes $111,935
 $32,178
 $26,743
 $16,979
 $8,789
 $121,714
 $33,033
 $27,662
 $14,428
 $10,751
                    
Six Months Ended June 30, 2017:          
Three Months Ended March 31, 2017:          
Income (loss) before income taxes $209,781
 $58,562
 $48,513
 $30,146
 $19,832
 $97,831
 $26,384
 $21,770
 $13,167
 $11,043
          
Three Months Ended June 30, 2016:          
Income (loss) before income taxes $87,941
 $25,839
 $22,441
 $15,509
 $10,005
          
Six Months Ended June 30, 2016:          
Income (loss) before income taxes $168,792
 $46,747
 $43,142
 $29,333
 $20,617
  National Business Lines  
  HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance Other NBLs Corporate & Other
At March 31, 2018 (in millions)
Loans, net of deferred loan fees and costs $167.0
 $1,539.8
 $1,168.9
 $1,378.7
 $2,725.4
 $3.3
Deposits 2,475.3
 
 1,733.5
 
 
 238.8
             
At December 31, 2017            
Loans, net of deferred loan fees and costs $162.1
 $1,580.4
 $1,097.9
 $1,327.7
 $2,543.0
 $4.1
Deposits 2,230.4
 
 1,737.6
 
 
 69.0
  (in thousands)
Three Months Ended March 31, 2018:            
Income (loss) before income taxes $7,659
 $1,779
 $14,388
 $10,756
 $12,088
 $(10,830)
             
Three Months Ended March 31, 2017:            
Income (loss) before income taxes $5,615
 $3,723
 $10,964
 $10,593
 $6,616
 $(12,044)

  National Business Lines  
�� HOA
Services
 Public & Nonprofit Finance Technology & Innovation Hotel Franchise Finance  Other NBLs Corporate & Other
At June 30, 2017 (in millions)
Loans, net of deferred loan fees and costs $150.3
 $1,545.7
 $1,044.4
 $1,238.5
 $2,173.2
 $7.7
Deposits 2,186.9
 
 1,272.4
 
 
 68.6
             
At December 31, 2016            
Loans, net of deferred loan fees and costs $116.8
 $1,454.3
 $1,011.4
 $1,292.1
 $1,776.9
 $13.4
Deposits 1,890.3
 
 1,038.2
 
 
 120.2
  (in thousands)
Three Months Ended June 30, 2017:            
Income (loss) before income taxes $6,498
 $5,319
 $13,305
 $8,546
 $8,948
 $(15,370)
             
Six Months Ended June 30, 2017:  
Income (loss) before income taxes $12,113
 $9,057
 $24,269
 $19,139
 $15,564
 $(27,414)
             
Three Months Ended June 30, 2016:            
Income (loss) before income taxes $4,189
 $2,929
 $10,926
 $9,511
 $7,461
 $(20,869)
             
Six Months Ended June 30, 2016:            
Income (loss) before income taxes $7,307
 $6,491
 $23,131
 $9,511
 $15,058
 $(32,545)
BALANCE SHEET ANALYSIS
Total assets increased $1.64 billion,$431.6 million, or 9.6%2.1%, to $18.84$20.76 billion at June 30, 2017,March 31, 2018, compared to $17.20$20.33 billion at December 31, 2016.2017. The increase in total assets relates primarily to organic loan growth, and an increasewhich was partially offset by a decrease in cash and cash equivalents andAFS investment securities resulting from increased deposits.of $94.1 million. Loans increased $781.6$466.5 million, or 5.9%3.1%, to $13.99$15.56 billion at June 30, 2017,March 31, 2018, compared to $13.21$15.09 billion at December 31, 2016.2017. The increase in loans during the quarter was driven by construction and land development loans of $325.3 million and commercial and industrial loans of $103.0 million.
Total liabilities increased $1.48 billion,$367.6 million, or 9.6%2.0%, to $16.79$18.47 billion at June 30, 2017,March 31, 2018, compared to $15.31$18.10 billion at December 31, 2016.2017. The increase in liabilities is due primarily to an increase in total deposits of $1.48 billion,$382.0 million, or 10.2%2.3%, to $16.03$17.35 billion, all of which is attributable to organic deposit growth.
Total stockholders’ equity increased by $167.1$64.1 million, or 8.8%2.9%, to $2.06$2.29 billion at June 30, 2017,March 31, 2018, compared to $1.89$2.23 billion at December 31, 2016.2017. The increase in stockholders' equity relates primarily to net income for the sixthree months ended June 30, 2017 and an increaseMarch 31, 2018, partially offset by a decrease in the fair value of the Company's AFS portfolio, which is recognized as part of AOCI.
Investment securities
Investment securities are classified at the time of acquisition as either HTM, AFS, or measured at fair value based upon various factors, including asset/liability management strategies, liquidity and profitability objectives, and regulatory requirements. HTM securities are carried at amortized cost, adjusted for amortization of premiums or accretion of discounts. AFS securities are securities that may be sold prior to maturity based upon asset/liability management decisions. Investment securities classified as AFS are carried at fair value. Unrealized gains or losses on AFS debt securities are recorded as part of AOCI in stockholders’ equity. Effective January 1, 2018, unrealized gains or losses on AFS equity securities are recorded in earnings as part of non-interest income. Amortization of premiums or accretion of discounts on MBS is periodically adjusted for estimated prepayments. Investment securities measured at fair value are reported at fair value, with unrealized gains and losses included in current period earnings.

The Company's investment securities portfolio is utilized as collateral for borrowings, required collateral for public deposits and customer repurchase agreements, and to manage liquidity, capital, and interest rate risk. The following table summarizes the carrying value of the investment securities portfolio for each of the periods below: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
CDO $15,553
 $13,490
 $19,453
 $21,857
Commercial MBS issued by GSEs 115,327
 117,792
 104,973
 109,077
Corporate debt securities 63,922
 64,144
 101,676
 103,483
CRA investments 49,482
 37,113
 50,846
 50,616
Preferred stock 97,506
 94,662
 93,318
 53,196
Private label residential MBS 680,248
 433,685
 818,996
 868,524
Residential MBS issued by GSEs 1,555,137
 1,356,258
 1,626,899
 1,689,295
Tax-exempt 536,991
 500,312
 760,225
 765,960
Trust preferred securities 29,405
 26,532
 28,617
 28,617
U.S. government sponsored agency securities 71,391
 56,022
 60,290
 61,462
U.S. treasury securities 2,498
 2,502
 2,473
 2,482
Total investment securities $3,217,460
 $2,702,512
 $3,667,766
 $3,754,569

Loans
The table below summarizes the distribution of the Company’s held for investment loan portfolio: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Commercial and industrial $6,236,083
 $5,755,021
 $6,944,381
 $6,841,381
Commercial real estate - non-owner occupied 3,649,108
 3,543,956
 3,925,301
 3,904,011
Commercial real estate - owner occupied 2,021,226
 2,013,276
 2,264,650
 2,241,613
Construction and land development 1,601,705
 1,478,114
 1,957,489
 1,632,204
Residential real estate 334,800
 259,432
 418,127
 425,940
Commercial leases 82,429
 100,765
Consumer 47,908
 38,963
 50,505
 48,786
Loans, net 13,973,259
 13,189,527
Loans, net of deferred loan fees and costs 15,560,453
 15,093,935
Allowance for credit losses (131,811) (124,704) (144,659) (140,050)
Total loans HFI $13,841,448
 $13,064,823
 $15,415,794
 $14,953,885
Net deferred loan fees and costs as of June 30, 2017March 31, 2018 and December 31, 20162017 total $20.4$32.6 million and $22.3$25.3 million, respectively, which is a reduction in the carrying value of loans. Net unamortized purchase discounts on loanssecondary market loan purchases total $7.4$8.0 million and $5.2$8.5 million as of June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively. Total loans held for investment are also net of interest rate and credit marks on acquired loans, which are a net reduction in the carrying value of loans. Interest rate marks were $20.7$13.0 million and $22.2$14.1 million as of June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively. Credit marks were $37.8$23.1 million and $47.3$27.0 million as of June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
As of June 30, 2017 and December 31, 2016, the Company also has $16.7 million and $18.9 million of HFS loans, respectively.

Concentrations of Lending Activities
The Company monitors concentrations within four broad categories: product, collateral, geography, and industry. The Company’s loan portfolio includes significant credit exposure to the CRE market. As of June 30, 2017March 31, 2018 and December 31, 2016,2017, CRE related loans accounted for approximately 52% and 53% of total loans, respectively.loans. Substantially all of these loans are secured by first liens with an initial loan to value ratio of generally not more than 75%. Approximately 37% and 36% of these CRE loans, excluding construction and land loans, were owner-occupied at each of the periods ended June 30, 2017March 31, 2018 and December 31, 2016.2017, respectively.
Impaired loans
A loan is identified as impaired when it is no longer probable that interest and principal will be collected according to the contractual terms of the original loan agreement. Generally, impaired loans are classified as non-accrual. However, in certain instances, impaired loans may continue on an accrual basis if full repayment of all principal and interest is expected and the loan is both well-secured and in the process of collection. Impaired loans are measured for reserve requirements in accordance with ASC 310 based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral less applicable disposition costs if the loan is collateral dependent. The amount of an impairment reserve, if any, and any subsequent changes are charged against the allowance for credit losses.
In addition to the Company's own internal loan review process, regulators may from time to time direct the Company to modify loan grades, loan impairment calculations, or loan impairment methodology.

Total non-performing loans decreased by $16.7$5.3 million, or 17.5%6.1%, at June 30, 2017March 31, 2018 to $78.3$81.1 million from $95.0$86.4 million at December 31, 2016.2017. 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (dollars in thousands) (dollars in thousands)
Total non-accrual loans (1) $30,071
 $40,272
 $37,297
 $43,925
Loans past due 90 days or more on accrual status (2) 4,021
 1,067
 37
 43
Accruing troubled debt restructured loans 44,221
 53,637
 43,766
 42,431
Total nonperforming loans, excluding loans acquired with deteriorated credit quality 78,313
 94,976
 81,100
 86,399
Other impaired loans 27,321
 4,233
 16,492
 12,155
Total impaired loans $105,634
 $99,209
 $97,592
 $98,554
Other assets acquired through foreclosure, net $30,988
 $47,815
 $30,194
 $28,540
Non-accrual loans to gross loans held for investment 0.22% 0.31% 0.24% 0.29%
Loans past due 90 days or more on accrual status to gross loans held for investment 0.03
 0.01
 0.00
 0.00
(1)Includes non-accrual TDR loans of $11.0$7.4 million and $7.1$10.1 million at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
(2)Includes $0.3less than $0.1 million from loans acquired with deteriorated credit quality at each of the periods ended June 30, 2017March 31, 2018 and December 31, 2016.2017.
Interest income received on non-accrual loans was $0.4 million and $0.2$0.3 million for the three months ended June 30,March 31, 2018 and 2017, and 2016 and $0.7 million and $0.4 million for the six months ended June 30, 2017 and 2016, respectively. Interest income that would have been recorded under the original terms of non-accrual loans was $0.6 million and $0.5 million for each of the three months ended June 30, 2017March 31, 2018 and 2016 and $1.2 million and $0.9 million for the six months ended June 30, 2017 and 2016, respectively.

2017.
The composition of non-accrual loans by loan type and by segment were as follows: 
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 Non-accrual
Balance
 Percent of Non-Accrual Balance Percent of
Total HFI
Loans
 Non-accrual
Balance
 Percent of Non-Accrual Balance Percent of
Total HFI
Loans
 Non-accrual
Balance
 Percent of Non-Accrual Balance Percent of
Total HFI
Loans
 Non-accrual
Balance
 Percent of Non-Accrual Balance Percent of
Total HFI
Loans
 (dollars in thousands) (dollars in thousands)
Commercial and industrial $14,300
 47.55% 0.10% $16,967
 42.13% 0.13% $24,184
 64.84% 0.16% $22,026
 50.14% 0.15%
Commercial real estate 10,724
 35.66
 0.08
 16,666
 41.39
 0.13
 2,930
 7.86
 0.02
 7,721
 17.59
 0.05
Construction and land development 1,284
 4.27
 0.01
 1,284
 3.19
 0.01
 
 
 
 5,979
 13.61
 0.04
Residential real estate 3,608
 12.00
 0.03
 5,192
 12.89
 0.04
 9,844
 26.39
 0.06
 8,117
 18.48
 0.05
Consumer 155
 0.52
 
 163
 0.40
 
 339
 0.91
 0.00
 82
 0.19
 0.00
Total non-accrual loans $30,071
 100.00% 0.22% $40,272
 100.00% 0.31% $37,297
 100.00% 0.24% $43,925
 100.00% 0.29%
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 Nonaccrual Loans Percent of Segment's Total HFI Loans Nonaccrual Loans Percent of Segment's Total HFI Loans Nonaccrual Loans Percent of Segment's Total HFI Loans Nonaccrual Loans Percent of Segment's Total HFI Loans
 (dollars in thousands) (dollars in thousands)
Arizona $9,285
 0.30% $10,424
 0.35% $8,330
 0.24% $4,520
 0.14%
Nevada 4,546
 0.26
 10,407
 0.60
 3,354
 0.18
 8,189
 0.44
Southern California 2,835
 0.15
 2,891
 0.16
 8,641
 0.43
 8,140
 0.42
Northern California 4,464
 0.39
 4,408
 0.41
 5,350
 0.42
 14,489
 1.14
Technology and Innovation 6,312
 0.60
 8,813
 0.87
 11,283
 0.97
 7,389
 0.67
Other NBLs 155
 0.01
 166
 0.01
Other NBLS 333
 0.01
 51
 0.00
Corporate & Other 2,474
 32.10
 3,163
 23.22
 6
 0.18
 1,147
 28.09
Total non-accrual loans $30,071
 0.22% $40,272
 0.31% $37,297
 0.24% $43,925
 0.29%

Troubled Debt Restructured Loans
A TDR loan is a loan that is granted a concession, for reasons related to a borrower’s financial difficulties, that the lender would not otherwise consider. The loan terms that have been modified or restructured due to a borrower’s financial situation include, but are not limited to, a reduction in the stated interest rate, an extension of the maturity or renewal of the loan at an interest rate below current market, a reduction in the face amount of the debt, a reduction in accrued interest, extensions, deferrals, renewals, and rewrites. A TDR loan is also considered impaired. Generally, a loan that is modified at an effective market rate of interest is no longer disclosed as a TDR in years subsequent to the restructuring if it is performing based on the terms specified by the restructuring agreement. However, such loans continue to be considered impaired.
As of June 30, 2017March 31, 2018 and December 31, 2016,2017, the aggregate amount of loans classified as impaired was $105.6$97.6 million and $99.2$98.6 million, respectively, a net increase of 6.5%.respectively. The total specific allowance for credit losses related to these loans was $3.9 million and $4.2$5.6 million at June 30, 2017March 31, 2018 and December 31, 2016, respectively.2017. The Company had $44.2$43.8 million and $53.6$42.4 million in loans classified as accruing restructured loans at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively.
Impaired loans by segment at June 30, 2017March 31, 2018 and December 31, 20162017 were as follows:
 June 30, 2017 December 31, 2016 March 31, 2018 December 31, 2017
 (in thousands) (in thousands)
Arizona $17,941
 $19,180
 $15,014
 $10,468
Nevada 49,827
 48,348
 38,516
 46,730
Southern California 6,364
 2,888
 9,965
 8,465
Northern California 7,423
 4,024
 6,025
 14,489
Technology & Innovation 19,319
 8,461
 27,029
 16,449
Other NBLs 155
 163
 333
 51
Corporate & Other 4,605
 16,145
 710
 1,902
Total impaired loans $105,634
 $99,209
 $97,592
 $98,554
The following tables present a breakdown of total impaired loans and the related specific reserves for the periods indicated: 
 June 30, 2017 March 31, 2018
 Impaired
Balance
 Percent of Impaired Balance Percent of
Total HFI Loans
 Reserve
Balance
 Percent of Reserve Balance Percent of
Total Allowance
 Impaired
Balance
 Percent of Impaired Balance Percent of
Total HFI Loans
 Reserve
Balance
 Percent of Reserve Balance Percent of
Total Allowance
 (dollars in thousands) (dollars in thousands)
Commercial and industrial $33,538
 31.74% 0.24% $3,135
 80.84% 2.38% $43,459
 44.53% 0.28% $5,389
 96.89% 3.73%
Commercial real estate 42,885
 40.60
 0.31
 743
 19.16
 0.56
 25,761
 26.40
 0.17
 
 
 
Construction and land development 12,146
 11.50
 0.09
 
 
 
 9,812
 10.06
 0.06
 
 
 
Residential real estate 16,867
 15.97
 0.12
 
 
 
 18,185
 18.63
 0.12
 173
 3.11
 0.12
Consumer 198
 0.19
 
 
 
 
 375
 0.38
 0.00
 
 
 
Total impaired loans $105,634
 100.00% 0.76% $3,878
 100.00% 2.94% $97,592
 100.00% 0.63% $5,562
 100.00% 3.84%
 
 December 31, 2016 December 31, 2017
 Impaired
Balance
 Percent of Impaired Balance Percent of
Total HFI Loans
 Reserve
Balance
 Percent of Reserve Balance Percent of
Total Allowance
 Impaired
Balance
 Percent of Impaired Balance Percent of
Total HFI Loans
 Reserve
Balance
 Percent of Reserve Balance Percent of
Total Allowance
 (dollars in thousands) (dollars in thousands)
Commercial and industrial $21,462
 21.63% 0.16% $3,301
 77.88% 2.65% $34,156
 34.66% 0.23% $5,606
 100.00% 4.00%
Commercial real estate 46,272
 46.64
 0.36
 937
 22.10
 0.75
 31,681
 32.15
 0.21
 
 
 
Construction and land development 14,838
 14.96
 0.11
 
 
 
 15,426
 15.65
 0.10
 
 
 
Residential real estate 16,391
 16.52
 0.12
 
 
 
 17,170
 17.42
 0.11
 
 
 
Consumer 246
 0.25
 
 1
 0.02
 
 121
 0.12
 0.00
 
 
 
Total impaired loans $99,209
 100.00% 0.75% $4,239
 100.00% 3.40% $98,554
 100.00% 0.65% $5,606
 100.00% 4.00%


Allowance for Credit Losses
The following table summarizes the activity in the Company's allowance for credit losses for the period indicated: 
Three Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
2017 2016 2017 20162018 2017
(dollars in thousands)(dollars in thousands)
Allowance for credit losses:          
Balance at beginning of period$127,649
 $119,227
 $124,704
 $119,068
$140,050
 $124,704
Provision charged to operating expense:          
Commercial and industrial2,197
 (252) 4,559
 5,638
3,143
 2,362
Commercial real estate2,002
 1,237
 3,801
 (2,074)1,247
 1,798
Construction and land development(753) 1,903
 (1,108) 2,257
1,695
 (355)
Residential real estate(541) (545) (117) (1,116)(102) 425
Consumer95
 157
 115
 295
17
 20
Total Provision3,000
 2,500
 7,250
 5,000
6,000
 4,250
Recoveries of loans previously charged-off:          
Commercial and industrial(1,759) (804) (2,087) (2,380)(459) (328)
Commercial real estate(406) (770) (938) (4,435)(126) (533)
Construction and land development(508) (58) (785) (153)(1,388) (277)
Residential real estate(1,299) (153) (1,551) (410)(250) (251)
Consumer
 (43) (49) (110)(10) (49)
Total recoveries(3,972) (1,828) (5,410) (7,488)(2,233) (1,438)
Loans charged-off:          
Commercial and industrial651
 1,161
 3,245
 8,652
3,517
 2,594
Commercial real estate1,819
 244
 1,819
 654

 
Construction and land development
 
 
 

 
Residential real estate332
 
 447
 26
107
 115
Consumer8
 46
 42
 120

 34
Total charged-off2,810
 1,451
 5,553
 9,452
3,624
 2,743
Net (recoveries) charge-offs(1,162) (377) 143
 1,964
Net charge-offs1,391
 1,305
Balance at end of period$131,811
 $122,104
 $131,811
 $122,104
$144,659
 $127,649
Net (recoveries) charge-offs to average loans outstanding - annualized(0.03)% (0.01)% 0.00% 0.03%
Net charge-offs to average loans outstanding0.04% 0.04%
Allowance for credit losses to gross loans0.93
 0.94
Allowance for credit losses to gross organic loans1.08
 1.15
    1.02
 1.08

The following table summarizes the allocation of the allowance for credit losses by loan type. However, the allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. 
 Commercial and Industrial Commercial Real Estate Construction and Land Development Residential Real Estate Consumer Total Commercial and Industrial Commercial Real Estate Construction and Land Development Residential Real Estate Consumer Total
 (dollars in thousands) (dollars in thousands)
June 30, 2017            
March 31, 2018            
Allowance for Credit Losses $76,734
 $28,593
 $20,852
 $4,838
 $794
 $131,811
 $82,878
 $32,868
 $22,594
 $5,519
 $800
 $144,659
Percent of Total Allowance for Credit Losses 58.2% 21.7% 15.8% 3.7% 0.6% 100.0% 57.3% 22.7% 15.6% 3.8% 0.6% 100.0%
Percent of Gross Loans to Total Gross HFI Loans 44.3
 41.4
 11.7
 2.3
 0.3
 100.0
December 31, 2016            
Percent of Loan Type to Total HFI Loans 44.6
 39.8
 12.6
 2.7
 0.3
 100.0
December 31, 2017            
Allowance for Credit Losses $73,333
 $25,673
 $21,175
 $3,851
 $672
 $124,704
 $82,527
 $31,648
 $19,599
 $5,500
 $776
 $140,050
Percent of Total Allowance for Credit Losses 58.8% 20.6% 17.0% 3.1% 0.5% 100.0% 58.9% 22.6% 14.0% 3.9% 0.6% 100.0%
Percent of Gross Loans to Total Gross HFI Loans 44.3
 42.1
 11.3
 2.0
 0.3
 100.0
Percent of Loan Type to Total HFI Loans 45.2
 40.8
 10.9
 2.8
 0.3
 100.0
Problem Loans
The Company classifies loans consistent with federal banking regulations using a nine category grading system. These loan grades are described in further detail in "Item 1. Business” of the Company's Annual Report for the year ended December 31, 2016.2017. The following table presents information regarding potential and actual problem loans, consisting of loans graded Special Mention, Substandard, Doubtful, and Loss, but still performing, and excluding acquired loans: 
 June 30, 2017 March 31, 2018
 Number of Loans Loan Balance Percent of Loan Balance Percent of Total HFI Loan Balance Number of Loans Loan Balance Percent of Loan Balance Percent of Total HFI Loan Balance
 (dollars in thousands) (dollars in thousands)
Commercial and industrial 95
 $121,804
 60.08% 0.87% 159
 $139,189
 53.30% 0.90%
Commercial real estate 38
 63,715
 31.43
 0.46
 52
 106,904
 40.93
 0.69
Construction and land development 7
 16,053
 7.92
 0.11
 5
 5,382
 2.06
 0.03
Residential real estate 3
 1,027
 0.51
 0.01
 3
 9,146
 3.50
 0.06
Consumer 5
 113
 0.06
 
 5
 553
 0.21
 0.00
Total 148
 $202,712
 100.00% 1.45% 224
 $261,174
 100.00% 1.68%
 
 December 31, 2016 December 31, 2017
 Number of Loans Loan Balance Percent of Loan Balance Percent of Total HFI Loan Balance Number of Loans Loan Balance Percent of Loan Balance Percent of Total HFI Loan Balance
 (dollars in thousands) (dollars in thousands)
Commercial and industrial 96
 $92,019
 51.65% 0.70% 166
 $127,015
 51.63% 0.84%
Commercial real estate 41
 71,900
 40.36
 0.55
 48
 90,653
 36.85
 0.60
Construction and land development 7
 12,297
 6.90
 0.09
 5
 18,471
 7.51
 0.12
Residential real estate 9
 1,831
 1.03
 0.01
 3
 8,971
 3.65
 0.06
Consumer 9
 103
 0.06
 
 10
 880
 0.36
 0.01
Total 162
 $178,150
 100.00% 1.35% 232
 $245,990
 100.00% 1.63%
Based on discussions with regulatory authorities, we expect that credit rating guidelines for technology loans may involve broader parameters for classification as Special Mention, which could result in increased levels of Special Mention loans in this category than reported historically. However, such classification changes should not affect the ultimate collectability of such loans, nor result in higher levels on non-performing assets.


Other Assets Acquired Through Foreclosure
The following table represents the changes in other assets acquired through foreclosure: 
  Three Months Ended June 30, 2017
  Gross Balance Valuation Allowance Net Balance
  (in thousands)
Balance, beginning of period $50,919
 $(5,719) $45,200
Transfers to other assets acquired through foreclosure, net 1,392
 
 1,392
Proceeds from sale of other real estate owned and repossessed assets, net (17,208) 1,826
 (15,382)
Valuation adjustments, net 
 (156) (156)
(Losses) gains, net (1) (66) 
 (66)
Balance, end of period $35,037
 $(4,049) $30,988
       
  Three Months Ended June 30, 2016
Balance, beginning of period $61,346
 $(8,570) $52,776
Transfers to other assets acquired through foreclosure, net 88
 
 88
Proceeds from sale of other real estate owned and repossessed assets, net (4,480) 1,813
 (2,667)
Valuation adjustments, net 
 134
 134
(Losses) gains, net (1) (489) 
 (489)
Balance, end of period $56,465
 $(6,623) $49,842
 Six Months Ended June 30, 2017 Three Months Ended March 31, 2018:
 Gross Balance Valuation Allowance Net Balance Gross Balance Valuation Allowance Net Balance
 (in thousands) (in thousands)
Balance, beginning of period $54,138
 $(6,323) $47,815
 $32,552
 $(4,012) $28,540
Transfers to other assets acquired through foreclosure, net 1,392
 
 1,392
 5,744
 
 5,744
Proceeds from sale of other real estate owned and repossessed assets, net (20,321) 2,050
 (18,271) (5,294) 9
 (5,285)
Valuation adjustments, net 
 224
 224
 
 (47) (47)
(Losses) gains, net (1) (172) 
 (172)
Gains (losses), net (1) 1,242
   1,242
Balance, end of period $35,037
 $(4,049) $30,988
 $34,244
 $(4,050) $30,194
        
 Six Months Ended June 30, 2016 Three Months Ended March 31, 2017
Balance, beginning of period $52,984
 $(9,042) $43,942
 $54,138
 $(6,323) $47,815
Transfers to other assets acquired through foreclosure, net 10,726
 
 10,726
 
 
 
Proceeds from sale of other real estate owned and repossessed assets, net (6,916) 2,108
 (4,808) (3,113) 224
 (2,889)
Valuation adjustments, net 
 311
 311
 
 380
 380
(Losses) gains, net (1) (329) 
 (329)
Gains (losses), net (1) (106) 
 (106)
Balance, end of period $56,465
 $(6,623) $49,842
 $50,919
 $(5,719) $45,200
(1)There were $0.1was $1.0 million and zeroin net gains related to initial transfers to other assets during the three and six months ended June 30, 2017March 31, 2018 and 2016, respectively.compared to zero during the three months ended March 31, 2017.
Other assets acquired through foreclosure consist primarily of properties acquired as a result of, or in-lieu-of, foreclosure. OREO and other repossessed property are reported at the lower of carrying value or fair value less estimated costs to sell the property. Costs relating to the development or improvement of the assets are capitalized and costs relating to holding the assets are charged to expense. The Company has $31.0$30.2 million, $47.8$28.5 million $49.8$45.2 million of such assets at June 30, 2017,March 31, 2018, December 31, 2016,2017, and June 30, 2016,March 31, 2017, respectively.
At June 30,March 31, 2018 and 2017, the majority of the Company’s repossessed assets consisted of properties located in Nevada. The Company held 21 OREO18 properties at March 31, 2018, compared to 3119 at December 31, 2016,2017, and 3425 at June 30, 2016.March 31, 2017.

Goodwill and Other Intangible Assets
Goodwill represents the excess consideration paid for net assets acquired in a business combination over their fair value. Goodwill and other intangible assets acquired in a business combination that are determined to have an indefinite useful life are not subject to amortization, but are subsequently evaluated for impairment at least annually. The Company has goodwill of $289.9 million and intangible assets totaling $11.8$10.5 million at June 30, 2017,March 31, 2018, which have been allocated to the Nevada, Northern California, Technology & Innovation, and HFF operating segments.
The Company performs its annual goodwill and intangibles impairment tests as of October 1 each year, or more often if events or circumstances indicate that the carrying value may not be recoverable. During the three and six months ended June 30,March 31, 2018 and 2017, and 2016, there were no events or circumstances that indicated an interim impairment test of goodwill or other intangible assets was necessary.
The Company recognized initial goodwill of $0.2 million during the three months ended June 30, 2016 related to the HFF loan portfolio acquisition, which closed on April 20, 2016. The fair values of assets acquired and liabilities assumed are subject to adjustment during the first twelve months after the acquisition date if additional information becomes available to indicate a more accurate or appropriate value for an asset or liability. During the six months ended June 30, 2017, the Company recognized measurement period adjustments totaling $0.1 million for tax related items, which reduced goodwill related to the HFF acquisition to $0.1 million. The measurement period for the HFF acquisition ended on April 20, 2017. Therefore, the fair values of these assets acquired and liabilities assumed were considered final effective April 20, 2017.
During the three and six months ended June 30, 2016, the Company identified $0.8 million and $1.5 million, respectively, in measurement period adjustments from the Bridge acquisition, primarily related to reductions in other assets and accrued liabilities. The measurement period for the Bridge acquisition ended on June 30, 2016, therefore, the fair values of these assets acquired and liabilities assumed are final.
Deferred Tax Assets
As of June 30, 2017,March 31, 2018, the net deferred tax asset was $87.7$27.4 million, a decreasean increase of $7.5$21.6 million from December 31, 2016.2017. This overall decreaseincrease in the net deferred tax asset was primarily the result of increasesrecognizing previously deferred income and decreases in the fair market value of AFS securities.
At June 30, 2017March 31, 2018 and December 31, 2016,2017, the Company had no deferred tax valuation allowance.

Deposits
Deposits are the primary source for funding the Company's asset growth. Total deposits increased to $16.03$17.35 billion at June 30, 2017,March 31, 2018, from $14.55$16.97 billion at December 31, 2016,2017, an increase of $1.48 billion,$382.0 million, or 10.2%2.3%. The increase in deposits is attributable to organic deposit growth. Non-interest-bearing demandan increase in interest-bearing transaction account deposits increased by $1.23 billion from December 31, 2016. Savingsof $190.1 million and money market deposits decreased $16.83CDs of $139.9 million from December 31, 2016.2017.
WAB is a participant in the Promontory Interfinancial Network, a network that offers deposit placement services such as CDARS and ICS, which offer products that qualify large deposits for FDIC insurance. At June 30, 2017,March 31, 2018, the Company has $406.5$389.8 million of CDARS deposits and $559.9$634.8 million of ICS deposits, compared to $413.9$401.4 million of CDARS deposits and $607.5$617.9 million of ICS deposits at December 31, 2016.2017. At June 30, 2017March 31, 2018 and December 31, 2016,2017, the Company also has $71.4$88.3 million and $136.2$67.3 million, respectively, of wholesale brokered deposits. In addition, non-interest bearing deposits for which the Company provides account holders with earnings credits totaled $2.04$1.95 billion and $1.10$1.85 billion at June 30, 2017March 31, 2018 and December 31, 2016,2017, respectively. The Company incurred $2.1$2.7 million and $1.0$1.5 million in deposit related costs during the three months ended June 30,March 31, 2018 and 2017, and 2016, respectively. During the six months ended June 30, 2017 and 2016, the Company incurred $3.9 million and $1.8 million, respectively, in deposit related costs.

The average balances and weighted average rates paid on deposits are presented below:
 Three Months ended June 30, Three Months Ended March 31,
 2017 2016 2018 2017
 Average Balance Rate Average Balance Rate Average Balance Rate Average Balance Rate
 (dollars in thousands) (dollars in thousands)
Interest-bearing transaction accounts $1,492,700
 0.26% $1,194,171
 0.17% $1,654,720
 0.33% $1,434,826
 0.22%
Savings and money market accounts 6,155,832
 0.38
 5,837,403
 0.34
 6,226,611
 0.57
 6,068,997
 0.35
Time certificates of deposit 1,575,969
 0.72
 1,757,158
 0.50
 1,579,940
 0.98
 1,484,868
 0.62
Total interest-bearing deposits 9,224,501
 0.42
 8,788,732
 0.35
 9,461,271
 0.60
 8,988,691
 0.37
Non-interest-bearing demand deposits 6,735,358
 
 4,772,582
 
 7,510,614
 
 5,719,169
 
Total deposits $15,959,859
 0.24% $13,561,314
 0.23% $16,971,885
 0.33% $14,707,860
 0.23%
        
 Six Months Ended June 30,
 2017 2016
 Average Balance Rate Average Balance Rate
 (dollars in thousands)
Interest-bearing transaction accounts $1,463,923
 0.24% $1,143,028
 0.17%
Savings and money market accounts 6,112,654
 0.36
 5,585,654
 0.32
Time certificates of deposit 1,530,670
 0.67
 1,659,327
 0.48
Total interest-bearing deposits 9,107,247
 0.40
 8,388,009
 0.33
Non-interest-bearing demand deposits 6,230,071
 
 4,561,357
 
Total deposits $15,337,318
 0.24% $12,949,366
 0.22%
Other Borrowings
The Company from time to time utilizes short-term borrowed funds to support short-term liquidity needs generally created by increased loan demand. The majority of these short-term borrowed funds consist of advances from the FHLB and customer repurchase agreements. The Company’s borrowing capacity with the FHLB is determined based on collateral pledged, generally consisting of securities and loans. In addition, the Company has borrowing capacity from other sources, collateralized by securities, including securities sold under agreements to repurchase, which are reflected at the amount of cash received in connection with the transaction, and may require additional collateral based on the fair value of the underlying securities. At June 30, 2017,March 31, 2018, total short-term borrowed funds consist of customer repurchase agreements of $32.7$21.7 million and FHLB advances of $300.0 million. At December 31, 2016,2017, total short-term borrowed funds consisted of customer repurchase agreements of $41.7$26.0 million and FHLB advances of $80.0$390.0 million.
As of June 30, 2017March 31, 2018 and December 31, 2016,2017, the Company doesdid not have any borrowings classified as long-term.
Qualifying Debt
Qualifying debt consists of subordinated debt and junior subordinated debt, inclusive of issuance costs and fair market value adjustments. At June 30, 2017,March 31, 2018, the carrying value of qualifying debt was $375.4$363.9 million, compared to $367.9$376.9 million at December 31, 2016.2017.



Capital Resources
The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements could trigger certain mandatory or discretionary actions that, if undertaken, could have a direct material effect on the Company’s business and financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities, and certain off-balance sheet items (discussed in "Note 12. Commitments and Contingencies" to the Unaudited Consolidated Financial Statements) as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.
The capital framework under Basel III became effective for the Company on January 1, 2015. Under the Basel III final rules, minimum requirements have increased for both the quantity and quality of capital held by the Company. A new capital conservation buffer, comprised of Common Equity Tier 1 capital, is also established above the regulatory minimum capital requirements. This capital conservation buffer began being phased in on January 1, 2016 at 0.625% of risk-weighted assets and will increase each subsequent year by an additional 0.625% until reaching its final level of 2.5% on January 1, 2019. Strict eligibility requirements for regulatory capital instruments have been implemented under the final rules and the final rules also revise the definitions and calculations of Tier 1 capital, total capital, and risk-weighted assets.
As of June 30, 2017March 31, 2018 and December 31, 2016,2017, the Company and the Bank exceeded the capital levels necessary to be classified as well-capitalized, as defined by the banking agencies. The actual capital amounts and ratios for the Company and the Bank are presented in the following tables as of the periods indicated:
 Total Capital Tier 1 Capital Risk-Weighted Assets Tangible Average Assets Total Capital Ratio Tier 1 Capital Ratio Tier 1 Leverage Ratio Common Equity
Tier 1
 Total Capital Tier 1 Capital Risk-Weighted Assets Tangible Average Assets Total Capital Ratio Tier 1 Capital Ratio Tier 1 Leverage Ratio Common Equity
Tier 1
 (dollars in thousands) (dollars in thousands)
June 30, 2017                
March 31, 2018                
WAL $2,269,525
 $1,833,226
 $16,992,251
 $18,436,948
 13.4% 10.8% 9.9% 10.3% $2,567,539
 $2,114,453
 $19,425,630
 $20,057,003
 13.2% 10.9% 10.5% 10.5%
WAB 2,148,130
 1,860,974
 16,916,701
 18,342,329
 12.7
 11.0
 10.1
 11.0
 2,402,863
 2,101,071
 19,509,579
 20,123,862
 12.3
 10.8
 10.4
 10.8
Well-capitalized ratios         10.0
 8.0
 5.0
 6.5
         10.0
 8.0
 5.0
 6.5
Minimum capital ratios         8.0
 6.0
 4.0
 4.5
         8.0
 6.0
 4.0
 4.5
                                
December 31, 2016                
December 31, 2017                
WAL $2,107,480
 $1,675,871
 $15,980,092
 $16,868,674
 13.2% 10.5% 9.9% 10.0% $2,460,988
 $2,013,744
 $18,569,608
 $19,624,517
 13.3% 10.8% 10.3% 10.4%
WAB 2,001,081
 1,720,072
 15,888,346
 16,764,327
 12.6
 10.8
 10.3
 10.8
 2,299,919
 2,003,745
 18,664,200
 19,541,990
 12.3
 10.7
 10.3
 10.7
Well-capitalized ratios         10.0
 8.0
 5.0
 6.5
         10.0
 8.0
 5.0
 6.5
Minimum capital ratios         8.0
 6.0
 4.0
 4.5
         8.0
 6.0
 4.0
 4.5



Critical Accounting Policies
Critical accounting policies are defined as those that are reflective of significant judgments and uncertainties and could potentially result in materially different results under different assumptions and conditions. The critical accounting policies upon which the Company's financial condition and results of operations depend, and which involve the most complex subjective decisions or assessments, are included in the discussion entitled "Critical Accounting Policies" in "Item 7. Management's DiscussionDiscussions and Analysis of Financial Condition and Results of Operations," in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2016,2017, and all amendments thereto, as filed with the SEC. There were no material changes to the critical accounting policies disclosed in the Annual Report on Form 10-K.

Liquidity
Liquidity is the ongoing ability to accommodate liability maturities and deposit withdrawals, fund asset growth and business operations, and meet contractual obligations through unconstrained access to funding at reasonable market rates. Liquidity management involves forecasting funding requirements and maintaining sufficient capacity to meet the needs and accommodate fluctuations in asset and liability levels due to changes in the Company's business operations or unanticipated events.
The ability to have readily available funds sufficient to repay fully maturing liabilities is of primary importance to depositors, creditors, and regulators. The Company's liquidity, represented by cash and amounts due from banks, federal funds sold, and non-pledged marketable securities, is a result of the Company's operating, investing, and financing activities and related cash flows. In order to ensure funds are available when necessary, on at least a quarterly basis, the Company projects the amount of funds that will be required over a twelve monthtwelve-month period and it also strives to maintain relationships with a diversified customer base. Liquidity requirements can also be met through short-term borrowings or the disposition of short-term assets.
The following table presents the available and outstanding balances ofon the Company's lines of credit:
 June 30, 2017 March 31, 2018
 Available
Balance
 Outstanding Balance Available
Balance
 Outstanding Balance
 (in millions) (in millions)
Unsecured fed funds credit lines at correspondent banks $100.0
 $
 $100.0
 $
Other lines with correspondent banks:        
Secured other lines with correspondent banks 23.0
 
 
 
Unsecured other lines with correspondent banks 45.0
 
 45.0
 
Total other lines with correspondent banks $168.0
 $
 $145.0
 $
In addition to lines of credit, the Company has borrowing capacity with the FHLB and FRB from pledged loans and securities. The borrowing capacity, outstanding borrowings, and available credit as of June 30, 2017March 31, 2018 are presented in the following table:
 June 30, 2017 March 31, 2018
 (in millions) (in millions)
FHLB:    
Borrowing capacity $2,672.4
 $2,732.8
Outstanding borrowings 
 300.0
Letters of credit 343.0
 229.5
Total available credit $2,329.4
 $2,203.3
    
FRB:    
Borrowing capacity $1,162.8
 $1,220.5
Outstanding borrowings 
 
Total available credit $1,162.8
 $1,220.5
The Company has a formal liquidity policy and, in the opinion of management, its liquid assets are considered adequate to meet cash flow needs for loan funding and deposit cash withdrawals for the next 90-120 days. At June 30, 2017,March 31, 2018, there is $2.58was $2.69 billion in liquid assets, comprised of $606.8$439.4 million in cash, cash equivalents, and money market investments and $1.98$2.25 billion in unpledged marketable securities. At December 31, 2016,2017, the Company maintained $2.00$2.89 billion in liquid assets, comprised

of $284.5$416.8 million of cash, cash equivalents, and money market investments, and $1.72$2.48 billion of unpledged marketable securities.
The Parent maintains liquidity that would be sufficient to fund its operations and certain non-bank affiliate operations for an extended period should funding from normal sources be disrupted. Since deposits are taken by WAB and not by the Parent, Parent liquidity is not dependent on the Bank's deposit balances. In the Company's analysis of Parent liquidity, it is assumed that the Parent is unable to generate funds from additional debt or equity issuances, receives no dividend income from subsidiaries and does not pay dividends to stockholders, while continuing to make nondiscretionary payments needed to maintain operations and repayment of contractual principal and interest payments owed by the Parent and affiliated companies. Under this scenario, the amount of time the Parent and its non-bank subsidiary can operate and meet all obligations before the current liquid assets are exhausted is considered as part of the Parent liquidity analysis. Management believes the Parent maintains adequate liquidity capacity to operate without additional funding from new sources for over twelve months.
WAB maintains sufficient funding capacity to address large increases in funding requirements, such as deposit outflows. This capacity is comprised of liquidity derived from a reduction in asset levels and various secured funding sources. On a long-term basis, the Company’s liquidity will be met by changing the relative distribution of its asset portfolios (for example, by reducing investment or loan volumes, or selling or encumbering assets). Further, the Company can increase liquidity by soliciting higher levels of deposit accounts through promotional activities and/or borrowing from correspondent banks, the FHLB of San Francisco, and the FRB. At June 30, 2017,March 31, 2018, the Company's long-term liquidity needs primarily relate to funds required to support loan originations, commitments, and deposit withdrawals, which can be met by cash flows from investment payments and maturities, and investment sales, if necessary.
The Company’s liquidity is comprised of three primary classifications: 1) cash flows provided by operating activities; 2) cash flows used in investing activities; and 3) cash flows provided by financing activities. Net cash provided by or used in operating activities consists primarily of net income, adjusted for changes in certain other asset and liability accounts and certain non-cash income and expense items, such as the provision for credit losses, investment and other amortization and depreciation. For the sixthree months ended June 30,March 31, 2018 and 2017, and 2016, net cash provided by operating activities was $175.4$88.3 million and $115.1$88.0 million, respectively.
The Company's primary investing activities are the origination of real estate and commercial loans, the collection of repayments of these loans, and the purchase and sale of securities. The Company's net cash provided by and used in investing activities has been primarily influenced by its loan and securities activities. The net increase in loans for the sixthree months ended June 30,March 31, 2018 and 2017 and 2016 was $736.3$367.4 million and $401.7$342.1 million, respectively. There was a net increasedecrease in investment securities for the sixthree months ended June 30, 2017March 31, 2018 of $501.5$29.7 million, compared to a net increase of $187.3$89.9 million for the sixthree months ended June 30, 2016.March 31, 2017.
Net cash provided by financing activities has been impacted significantly by increased deposit levels. During the sixthree months ended June 30,March 31, 2018 and 2017, and 2016, net deposits increased $1.48 billion$382.0 million and $2.17 billion,$806.1 million, respectively.
Fluctuations in core deposit levels may increase the Company's need for liquidity as certificates of deposit mature or are withdrawn before maturity, and as non-maturity deposits, such as checking and savings account balances, are withdrawn. Additionally, the Company is exposed to the risk that customers with large deposit balances will withdraw all or a portion of such deposits, due in part to the FDIC limitations on the amount of insurance coverage provided to depositors. To mitigate the uninsured deposit risk, the Company participates in the CDARS and ICS programs, which allow an individual customer to invest up to $50.0 million and $110.0 million, respectively, through one participating financial institution or, a combined total of $150.0 million per individual customer, with the entire amount being covered by FDIC insurance. As of June 30, 2017,March 31, 2018, the Company has $406.5$389.8 million of CDARS and $559.9$634.8 million of ICS deposits.
As of June 30, 2017,March 31, 2018, the Company has $71.4$88.3 million of wholesale brokered deposits outstanding. Brokered deposits are generally considered to be deposits that have been received from a third party who is engaged in the business of placing deposits on behalf of others. A traditional deposit broker will direct deposits to the banking institution offering the highest interest rate available. Federal banking laws and regulations place restrictions on depository institutions regarding brokered deposits because of the general concern that these deposits are not relationship based and are at a greater risk of being withdrawn and placed on deposit at another institution offering a higher interest rate, thus posing liquidity risk for institutions that gather brokered deposits in significant amounts. There were also $249.0 million and $571.9 million of additional deposits as of June 30, 2017 and December 31, 2016, respectively, that the Company considers core deposits, but which are classified as brokered deposits for regulatory reporting purposes.
Federal and state banking regulations place certain restrictions on dividends paid. The total amount of dividends which may be paid at any date is generally limited to the retained earnings of the bank. Dividends paid by WAB to the Parent would be prohibited if the effect thereof would cause the bank’sBank’s capital to be reduced below applicable minimum capital requirements.

During the three months ended June 30, 2017,March 31, 2018, the Parent contributed no amounts$1.1 million to WAB and WAB and LVSP paid

dividends to the Parent of $10.0 million and $12.5 million, respectively. During the six months ended June 30, 2017, the Parent contributed $9.9 million to WAB and WAB and LVSP paid dividends to the Parent of $30.0 million and $22.4$1.1 million, respectively. Subsequent to June 30, 2017,March 31, 2018, WAB paid dividends to the Parent of $10.0 million.
Recent accounting pronouncements
See "Note 1. Summary of Significant Accounting Policies," of the Notes to Unaudited Consolidated Financial Statements contained in Item 1. Financial Statements for information on recent and recently adopted accounting pronouncements and their expected impact, if any, on the Company's consolidated financial statements.Consolidated Financial Statements.

Item 3.Quantitative and Qualitative Disclosures about Market Risk.
Market risk is the risk of loss in a financial instrument arising from adverse changes in market prices and rates, foreign currency exchange rates, commodity prices, and equity prices. The Company's market risk arises primarily from interest rate risk inherent in its lending, investing, and deposit taking activities. To that end, management actively monitors and manages the Company's interest rate risk exposure. The Company generally manages its interest rate sensitivity by evaluating re-pricing opportunities on its earning assets to those on its funding liabilities.
Management uses various asset/liability strategies to manage the re-pricing characteristics of the Company's assets and liabilities, all of which are designed to ensure that exposure to interest rate fluctuations is limited to within the Company's guidelines of acceptable levels of risk-taking. Hedging strategies, including the terms and pricing of loans and deposits and management of the deployment of its securities, are used to reduce mismatches in interest rate re-pricing opportunities of portfolio assets and their funding sources.
Interest rate risk is addressed by the ALCO, which includes members of executive management, finance, and operations. ALCO monitors interest rate risk by analyzing the potential impact on the net EVE and net interest income from potential changes in interest rates and considers the impact of alternative strategies or changes in balance sheet structure. The Company manages its balance sheet in part to maintain the potential impact on EVE and net interest income within acceptable ranges despite changes in interest rates.
The Company's exposure to interest rate risk is reviewed at least quarterly by the ALCO. Interest rate risk exposure is measured using interest rate sensitivity analysis to determine its change in both EVE and net interest income in the event of hypothetical changes in interest rates. If potential changes to EVE and net interest income resulting from hypothetical interest rate changes are not within the limits established by the BOD, the BOD may direct management to adjust the asset and liability mix to bring interest rate risk within Board-approved limits.
Net Interest Income Simulation. In order to measure interest rate risk at June 30, 2017,March 31, 2018, the Company uses a simulation model to project changes in net interest income that result from forecasted changes in interest rates. This analysis calculates the difference between a baseline net interest income forecast using current yield curves that do not take into consideration any future anticipated rate hikes, compared to forecasted net income resulting from an immediate parallel shift in rates upward or downward, along with other scenarios directed by ALCO. The income simulation model includes various assumptions regarding the re-pricing relationships for each of the Company's products. Many of the Company's assets are floating rate loans, which are assumed to re-price immediately and, proportional to the change in market rates, depending on their contracted index, including the impact of caps or floors. Some loans and investments contain contractual prepayment features (embedded options) and, accordingly, the simulation model incorporates prepayment assumptions. The Company's non-term deposit products re-price more slowly, usually changing less than the change in market rates and at the Company's discretion.
This analysis indicates the impact of changes in net interest income for the given set of rate changes and assumptions. It assumes the balance sheet remains static and that its structure does not change over the course of the year. It does not account for all factors that could impact the Company's results, including changes by management to mitigate interest rate changes or secondary factors, such as changes to the Company's credit risk profile as interest rates change.
Furthermore, loan prepayment rate estimates and spread relationships change regularly. Interest rate changes create changes in actual loan prepayment speeds that will differ from the market estimates incorporated in this analysis. Changes that vary significantly from the modeled assumptions may have significant effects on the Company's actual net interest income.

This simulation model assesses the changes in net interest income that would occur in response to an instantaneous and sustained increase or decrease (shock) in market interest rates over a twelve-month period. At June 30, 2017,March 31, 2018, the Company's net interest income exposure for the next twelve months related to these hypothetical changes in market interest rates was within the Company's current guidelines.guidelines for all up-rate scenarios. The Company’s net interest income exposure in the down-rate scenario was not within the Company’s guideline of (5.0)%. The breach is the result of an increase in short interest rates over the past two years, resulting from fed funds rate increases, and as floating-rate asset yields improved, the Company’s
deposit costs have not increased materially; thus in a current down-rate scenario, the Company will not see the full impact of a
rate decrease on its deposit costs while it will see that impact on floating-rate assets. The Board and management have accepted
the breach and believe that as deposit costs increase over time, interest expense will be more sensitive in a down-rate scenario,
dampening the Company’s overall net interest income sensitivity.

Sensitivity of Net Interest Income
 Interest Rate Scenario (change in basis points from Base) Interest Rate Scenario (change in basis points from Base)
 Down 100 Base Up 100 Up 200 Up 300 Up 400 Down 100 Base Up 100 Up 200 Up 300 Up 400
 (in thousands) (in thousands)
Interest Income $765,565
 $843,114
 $933,752
 $1,027,804
 $1,123,266
 $1,219,231
 $894,158
 $994,245
 $1,102,692
 $1,210,015
 $1,317,556
 $1,425,338
Interest Expense 26,849
 59,767
 101,028
 142,295
 183,568
 224,847
 63,415
 102,813
 147,045
 191,093
 235,081
 279,042
Net Interest Income 738,716
 783,347
 832,724
 885,509
 939,698
 994,384
 $830,743
 $891,432
 $955,647
 $1,018,922
 $1,082,475
 $1,146,296
% Change (5.7)%   6.3% 13.0% 20.0% 26.9% (6.8)%   7.2% 14.3% 21.4% 28.6%
Economic Value of Equity. The Company measures the impact of market interest rate changes on the NPV of estimated cash flows from its assets, liabilities, and off-balance sheet items, defined as EVE, using a simulation model. This simulation model assesses the changes in the market value of interest rate sensitive financial instruments that would occur in response to an instantaneous and sustained increase or decrease (shock) in market interest rates.
At June 30, 2017,March 31, 2018, the Company's EVE exposure related to these hypothetical changes in market interest rates was within the Company's current guidelines. The following table shows the Company's projected change in EVE for this set of rate shocks at June 30, 2017:March 31, 2018:
Economic Value of Equity 
 Interest Rate Scenario (change in basis points from Base) Interest Rate Scenario (change in basis points from Base)
 Down 100 Base Up 100 Up 200 Up 300 Up 400 Down 100 Base Up 100 Up 200 Up 300 Up 400
 (in thousands) (in thousands)
Assets $19,126,466
 $18,858,165
 $18,506,340
 $18,156,288
 $17,833,061
 $17,514,812
 $21,026,818
 $20,690,171
 $20,298,087
 $19,930,042
 $19,588,014
 $19,263,748
Liabilities 16,070,506
 15,696,287
 15,382,131
 15,115,166
 14,886,033
 14,688,251
 17,353,938
 16,968,425
 16,646,918
 16,374,427
 16,140,702
 15,938,979
Net Present Value 3,055,960
 3,161,878
 3,124,209
 3,041,122
 2,947,028
 2,826,561
 $3,672,880
 $3,721,746
 $3,651,169
 $3,555,615
 $3,447,312
 $3,324,769
% Change (3.3)%   (1.2)% (3.8)% (6.8)% (10.6)% (1.3)%   (1.9)% (4.5)% (7.4)% (10.7)%
The computation of prospective effects of hypothetical interest rate changes are based on numerous assumptions, including relative levels of market interest rates, asset prepayments, and deposit decay, and should not be relied upon as indicative of actual results. Further, the computations do not contemplate any actions the Company may undertake in response to changes in interest rates. Actual amounts may differ from the projections set forth above should market conditions vary from the underlying assumptions.
Derivative Contracts. In the normal course of business, the Company uses derivative instruments to meet the needs of its customers and manage exposure to fluctuations in interest rates. The following table summarizes the aggregate notional amounts, market values, and terms of the Company’s derivative positions as of June 30, 2017March 31, 2018 and December 31, 2016 :2017:
Outstanding Derivatives Positions
June 30, 2017 December 31, 2016
March 31, 2018March 31, 2018 December 31, 2017
NotionalNotional Net Value Weighted Average Term (Years) Notional Net Value Weighted Average Term (Years)Notional Net Value Weighted Average Term (Years) Notional Net Value Weighted Average Term (Years)
(dollars in thousands)
$1,032,586
 $(60,360) 17.8
 $993,485
 $(61,529) 18.2
1,117,074
 $(38,966) 15.8
 $1,115,736
 $(51,629) 16.0

Item 4.Controls and Procedures.
Evaluation of Disclosure Controls
Based on their evaluation as of the end of the period covered by this Quarterly Report on Form 10-Q, the CEO and CFO have concluded that the disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act) are effective to ensure that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act, as amended, is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms. Additionally, the Company's disclosure controls and procedures were also effective in ensuring that information required to be disclosed by the Company in the reports it files or is subject to under the Exchange Act is accumulated and communicated to the Company's management, including the CEO and CFO, to allow timely decisions regarding required disclosures.
Changes in Internal Control over Financial Reporting
There have not been any changes in the Company's internal control over financial reporting during the quarter ended June 30, 2017,March 31, 2018, which have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.
PART II. OTHER INFORMATION
Item 1.Legal Proceedings.
There are no material pending legal proceedings to which the Company is a party or to which any of its properties are subject. There are no material proceedings known to the Company to be contemplated by any governmental authority. From time to time, the Company is involved in a variety of litigation matters in the ordinary course of its business and anticipates that it will become involved in new litigation matters in the future.
Item 1A.Risk Factors.
There have not been any material changes to the risk factors previously disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2016.2017.
Item 2.Unregistered Sales of Equity Securities and Use of Proceeds.
Issuer Purchases of Equity Securities
The following table provides information about the Company's purchases of equity securities that are registered by the Company pursuant to Section 12 of the Exchange Act for the periods indicated.indicated:
  (a) (b) ( c) (d)
  
Total Number of Shares Purchased(1)
 Average Price Paid Per Share Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs 
Approximate Dollar Value of Shares That May Yet be Purchased Under the Plans or Programs (2)
4/1/2017 through 4/30/2017 868
 48.32
 
 
5/1/2017 through 5/31/2017 92
 47.16
 
 
6/1/2017 through 6/30/2017 
 
 
 
Total 960
 $48.20
 
 
         
(1) All shares purchased during the period were transferred to the Company from employees in satisfaction of minimum tax withholding obligations associated with the vesting of restricted stock awards during the period.
(2) The Company has not announced a repurchase plan relating to its common stock.
  (a) (b) ( c) (d)
  Total Number of Shares Purchased (1) Average Price Paid Per Share Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs Approximate Dollar Value of Shares That May Yet be Purchased Under the Plans or Programs (2)
1/1/2018 through 1/31/2018 105,980
 $59.42
  
2/1/2018 through 2/28/2018 74,887
 58.46
  
3/1/2018 through 3/31/2018 
 
  
Total 180,867
 $59.02
  
(1)All shares purchased during the period were transferred to the Company from employees in satisfaction of minimum tax withholding obligations associated with the vesting of restricted stock awards during the period.
(2)The Company has not announced a repurchase plan relating to its common stock.
Item 5.Other Information
Not applicable.

Item 6.Exhibits
EXHIBITS
3.1 
   
3.2 
   
3.3 
   
3.4 
   
3.5 
   
4.1 
   
4.2 
   
4.3 
   
4.4 
   
4.5 
   
4.6 
   
10.1±
 
10.2
   
31.1* 
   
31.2* 
   
32** 
   
101.INS* XBRL Instance Document.
   
101.SCH* XBRL Taxonomy Extension Schema Document.
   
101.DEF* XBRL Taxonomy Extension Definition Linkbase Document.
   
101.CAL* XBRL Taxonomy Extension Calculation Linkbase Document.
   
101.LAB* XBRL Taxonomy Extension Label Linkbase Document.
   
101.PRE* XBRL Taxonomy Extension Presentation Linkbase Document.
*    Filed herewith.
**Furnished herewith.
±Management contract or compensatory arrangement or contract.arrangement.


SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
  WESTERN ALLIANCE BANCORPORATION
     
July 28, 2017April 27, 2018 By: /s/ Robert SarverKenneth A. Vecchione
    Robert Sarver
Chairman of the Board andKenneth A. Vecchione
    Chief Executive Officer
     
July 28, 2017April 27, 2018 By: /s/ Dale Gibbons
    Dale Gibbons
    Executive Vice President and
    Chief Financial Officer
     
July 28, 2017April 27, 2018 By: /s/ J. Kelly Ardrey Jr.
    J. Kelly Ardrey Jr.
    Senior Vice President and
    Chief Accounting Officer



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