Consolidated Statements of Financial Position - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Cash and cash equivalents:
Cash and cash due from banks	$ 285,605	$ 226,003
Interest-bearing deposits with the Federal Reserve Bank and other banks	379,158	229,988
Total cash and cash equivalents	664,763	455,991
Investment securities:
Carried at fair value	2,736,880	1,963,546
Held-to-maturity, at amortized cost (fair value of $598,197 and $662,906, respectively)	608,367	677,093
Total investment securities	3,345,247	2,640,639
Loans held-for-sale, at fair value	93,736	52,133
Loans	14,796,252	14,155,267
Allowance for loan losses	(104,041)	(91,887)
Net loans	14,692,211	14,063,380
Premises and equipment	123,305	126,896
Loan servicing rights, at fair value	72,707	63,841
Goodwill	1,134,568	1,134,568
Other intangible assets	29,981	34,271
Interest receivable and other assets	748,971	709,154
Total assets	20,905,489	19,280,873
Deposits:
Noninterest-bearing	4,015,323	3,725,779
Interest-bearing	11,429,529	9,917,024
Total deposits	15,444,852	13,642,803
Collateralized customer deposits	377,471	415,236
Short-term borrowings	1,670,000	2,000,000
Long-term borrowings	430,971	372,882
Interest payable and other liabilities	193,271	181,203
Total liabilities	18,116,565	16,612,124
Shareholders’ equity
Preferred stock, none issued	0	0
Common stock issued	71,438	71,207
Additional paid-in capital	2,207,631	2,203,637
Retained earnings	567,510	419,403
Accumulated other comprehensive loss	(57,655)	(25,498)
Total shareholders’ equity	2,788,924	2,668,749
Total liabilities and shareholders’ equity	$ 20,905,489	$ 19,280,873