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FAIR VALUE MEASUREMENTS (Tables)
9 Months Ended
Sep. 30, 2013
Fair Value Disclosures [Abstract]  
Fair Value of Financial Assets and Liabilities Measured on Recurring Basis

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of September 30, 2013 and 2012, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:

 

     Level 1
Inputs
     Level 2
Inputs
     Level 3
Inputs
     Total Fair
Value
 
     (Dollars in thousands)  

September 30, 2013

           

Securities available for sale:

           

U.S. Treasury

   $ —         $ —         $ —         $ —     

U.S. Federal agencies

     —           340,904         20,000         360,904   

Mortgage-backed securities

     —           14,455         19,501         33,956   

States and political subdivisions

     —           53,386         —           53,386   

Other securities

     —           3,421         10,760         14,181   

Derivative assets

     —           3,049         —           3,049   

Derivative liabilities

     —           1,886         —           1,886   

Loans held for sale

     —           4,934         —           4,934   

Mortgage servicing intangibles

     —           —           595         595   

September 30, 2012

           

Securities available for sale:

           

U.S. Treasury

   $ —         $ —         $ —         $ —     

U.S. Federal agencies

     —           413,131         20,000         433,131   

Mortgage-backed securities

     —           22,390         —           22,390   

States and political subdivisions

     —           57,829         —           57,829   

Other securities

     —           —           10,356         10,356   

Derivative assets

     —           4,175         —           4,175   

Derivative liabilities

     —           1,868         —           1,868   

Loans held for sale

     —           13,384         —           13,384   

Mortgage servicing intangibles

     —           —           844         844   
Changes in Level 3 Assets Measured at Estimated Fair Value on Recurring Basis

The changes in Level 3 assets measured at estimated fair value on a recurring basis during the nine months ended September 30, 2013 and 2012 were as follows:

Nine Months Ended
September 30,
2013 2012
(Dollars in thousands)

Balance at the beginning of the year

$ 30,779 $ 33,225

Purchases, issuances and settlements

20,600 1,897

Sales

(251 ) (5,563 )

Gains included in earnings

182 4,424

Total unrealized losses

(454 ) (2,783 )

Balance at the end of the period

$ 50,856 $ 31,200
Assets Measured at Fair Value on Nonrecurring Basis

The following table summarizes assets measured at fair value on a nonrecurring basis and the related gains or losses recognized during the period:

 

     Level 1      Level 2      Level 3      Total
Fair
Value
     Gains
(Losses)
 
     (Dollars in thousands)  

Nine Months Ended September 30, 2013

  

     

Impaired loans (less specific allowance)

     —           —         $ 36,286       $ 36,286       $ —     

Foreclosed assets

     —           —           307         307         (9

Other real estate owned

     —           —           8,121         8,121         (754

Nine Months Ended September 30, 2012

              

Impaired loans (less specific allowance)

     —           —         $ 43,206       $ 43,206       $ —     

Foreclosed assets

     —           —           237         237         (84

Other real estate owned

     —           —           9,559         9,559         (1,226
Estimated Fair Values of Company's Financial Instruments

The estimated fair values of the Company’s financial instruments that are reported at amortized cost in the Company’s consolidated balance sheets, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value, are as follows:

 

     September 30,  
     2013      2012  
     Carrying
Amount
     Fair Value      Carrying
Amount
     Fair Value  
     (Dollars in thousands)  

FINANCIAL ASSETS

           

Level 2 inputs:

           

Cash and cash equivalents

   $ 1,826,936       $ 1,826,936       $ 1,912,614       $ 1,912,614   

Securities held for investment

     12,213         12,328         16,769         17,080   

Level 3 inputs:

           

Loans, net

     3,320,079         3,346,578         3,078,838         3,143,799   

FINANCIAL LIABILITIES

           

Level 2 inputs:

           

Deposits

     5,309,464         5,338,655         5,253,505         5,275,969   

Short-term borrowings

     5,074         5,074         5,665         5,665   

Long-term borrowings

     8,938         8,889         11,255         11,333   

Junior subordinated debentures

     26,804         28,927         26,804         28,777   

OFF-BALANCE SHEET FINANCIAL INSTRUMENTS

           

Loan commitments

        1,378            1,300   

Letters of credit

        468            458