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Financial Instruments with Off-Balance Sheet Risk (Tables)
12 Months Ended
Dec. 31, 2017
Financial Instruments With Off-balance Sheet Risk Tables  
Schedule of loan commitments outstanding and lines and letters of credit

Loan commitments outstanding and lines and letters of credit at December 31, 2017 and 2016 are as follows:

 

(dollars in thousands)   2017   2016  
Unfunded loan commitments   $ 2,267,774   $ 2,225,995  
Unfunded lines of credit   96,477   94,375  
Letters of credit   68,723   72,084  
Total   $ 2,432,974   $ 2,392,454