Federal Home Loan Bank Advances, Other Borrowings and Subordinated Notes (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Summary of Debt

The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown:

(Dollars in thousands)	March 31, 2018		December 31, 2017		March 31, 2017
FHLB advances	$	915,000	$	559,663	$	227,585
Other borrowings:
Notes payable	33,727		41,222		48,702
Short-term borrowings	17,977		17,209		39,246
Other	48,742		49,131		17,949
Secured borrowings	146,646		158,561		132,890
Total other borrowings	247,092		266,123		238,787
Subordinated notes	139,111		139,088		138,993
Total FHLB advances, other borrowings and subordinated notes	$	1,301,203	$	964,874	$	605,365

Summary of Pledged Securities Related to Securities Sold Under Repurchase Agreements

The following is a summary of these securities pledged as of March 31, 2018 disaggregated by investment category and maturity of the related customer sweep account, and reconciled to the outstanding balance of securities sold under repurchase agreements:

(Dollars in thousands)	Overnight Sweep Collateral
Available-for-sale securities pledged
Mortgage-backed securities	$	21,499
Held-to-maturity securities pledged
U.S. Government agencies	21,886
Total collateral pledged	$	43,385
Excess collateral	25,408
Securities sold under repurchase agreements	$	17,977