Deposits (Tables)

12 Months Ended

Dec. 31, 2017

Deposits [Abstract]

Deposits by type

The distribution of deposits at December 31 was as follows. 

	2017		2016
	($ in Thousands)
Noninterest-bearing demand	$	5,478,416	$	5,392,208
Savings	1,524,992		1,431,494
Interest-bearing demand	4,603,157		4,687,656
Money market	8,830,328		8,770,963
Brokered CDs	18,609		52,725
Other time	2,330,460		1,553,402
Total deposits	$	22,785,962	$	21,888,448

Time deposits by maturity

Aggregate annual maturities of all time deposits at December 31, 2017, are as follows.

Maturities During Year Ending December 31,	($ in Thousands)
2018	$	1,708,582
2019	298,774
2020	198,206
2021	84,306
2022	57,618
Thereafter	1,583
Total	$	2,349,069