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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]  
Commitments Disclosure
The following table presents a summary of the financial instruments described above as of the dates indicated:
 
March 31,
 
December 31,
 
2017
 
2016
 
(In thousands)
Loan commitments to extend credit
$
4,497,373

 
$
4,166,703

Standby letters of credit
221,718

 
211,398

 
$
4,719,091

 
$
4,378,101