Deposits (Tables)

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Deposit Liabilities, Type [Table Text Block]

A summary of deposits by type follows:

	At December 31,
(In thousands)	2017		2016
Non-interest-bearing:
Demand	$	4,191,496	$	4,021,061
Interest-bearing:
Checking	2,736,952		2,528,274
Health savings accounts	5,038,681		4,362,503
Money market	2,209,492		2,047,121
Savings	4,348,700		4,320,090
Time deposits	2,468,408		2,024,808
Total interest-bearing	16,802,233		15,282,796
Total deposits	$	20,993,729	$	19,303,857
Time deposits and interest-bearing checking, included in above balances, obtained through brokers	$	898,157	$	848,618
Time deposits, included in above balance, that meet or exceed the FDIC limit	561,512		490,721
Demand deposit overdrafts reclassified as loan balances	2,210		1,885

Time Deposit Maturities [Table Text Block]

The scheduled maturities of time deposits are as follows:

(In thousands)	At December 31, 2017
2018	$	1,381,899
2019	693,554
2020	236,955
2021	106,042
2022	49,831
Thereafter	127
Total time deposits	$	2,468,408