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Allowance for Loan and Lease Losses (Allowance for Acquired Eurobank Loan and Lease Losses) (Details) - Eurobank Acquired Loans - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Loan Receivable Type      
Allowance for Loan and Lease Losses [Roll Forward]      
Balance at beginning of period $ 90,178 $ 64,245 $ 52,729
Provision for loan and lease losses, net 2,255 38,040 5,680
Charge-offs 134 14,610  
FDIC Indemnification Asset Additional Estimated Losses Recoveries 3,391 2,503 5,836
Allowance de-recognition from new policy (74,409)    
Balance at end of period 21,281 90,178 64,245
Loans secured by 1-4 family residential properties, covered [Member]      
Allowance for Loan and Lease Losses [Roll Forward]      
Balance at beginning of period 22,570 5,469 2,441
Provision for loan and lease losses, net 1,080 17,718 2,144
Charge-offs 0 722  
FDIC Indemnification Asset Additional Estimated Losses Recoveries 3,391 105 884
Allowance de-recognition from new policy (15,094)    
Balance at end of period 11,947 22,570 5,469
Commercial and Construction      
Allowance for Loan and Lease Losses [Roll Forward]      
Balance at beginning of period 67,365 58,511 49,797
Provision for loan and lease losses, net 1,183 20,043 3,717
Charge-offs 134 13,587  
FDIC Indemnification Asset Additional Estimated Losses Recoveries 0 2,398 4,997
Allowance de-recognition from new policy (59,086)    
Balance at end of period 9,328 67,365 58,511
Consumer Loan [Member]      
Allowance for Loan and Lease Losses [Roll Forward]      
Balance at beginning of period 243 265 491
Provision for loan and lease losses, net (8) 279 (181)
Charge-offs 0 301  
FDIC Indemnification Asset Additional Estimated Losses Recoveries 0 0 45
Allowance de-recognition from new policy (229)    
Balance at end of period 6 243 265
Leasing      
Allowance for Loan and Lease Losses [Roll Forward]      
Balance at beginning of period 0 0 0
Provision for loan and lease losses, net 0 0 0
Charge-offs 0 0  
FDIC Indemnification Asset Additional Estimated Losses Recoveries 0 0 0
Allowance de-recognition from new policy 0    
Balance at end of period $ 0 $ 0 $ 0