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Deposits (Tables)
9 Months Ended
Sep. 30, 2017
Deposits [Abstract]  
Summary of Deposits
The following table is a summary of deposits as of the dates shown: 
(Dollars in thousands)
September 30,
2017
 
December 31,
2016
 
September 30,
2016
Balance:
 
 
 
 
 
Non-interest bearing
$
6,502,409

 
$
5,927,377

 
$
5,711,042

NOW and interest bearing demand deposits
2,273,025

 
2,624,442

 
2,552,611

Wealth management deposits
2,171,758

 
2,209,617

 
2,283,233

Money market
4,607,995

 
4,441,811

 
4,421,631

Savings
2,673,201

 
2,180,482

 
1,977,661

Time certificates of deposit
4,666,675

 
4,274,903

 
4,201,477

Total deposits
$
22,895,063

 
$
21,658,632

 
$
21,147,655

Mix:
 
 
 
 
 
Non-interest bearing
28
%
 
27
%
 
27
%
NOW and interest bearing demand deposits
10

 
12

 
12

Wealth management deposits
10

 
10

 
11

Money market
20

 
21

 
21

Savings
12

 
10

 
9

Time certificates of deposit
20

 
20

 
20

Total deposits
100
%
 
100
%
 
100
%