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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]  
Schedule of contractual amount of off-balance-sheet financial instruments
    March 31,     December 31,  
(in thousands)   2017     2016  
Commitments to extend credit   $ 238,425     $ 253,375  
Commitments to originate residential first and second mortgage loans     3,751       2,626  
Standby letters of credit     23,570       2,745  
Total     265,746       258,746