Consolidated Statements of Financial Position - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Cash and cash equivalents:
Cash and cash due from banks	$ 222,748	$ 226,003
Interest-bearing deposits with the Federal Reserve Bank and other banks	302,532	229,988
Total cash and cash equivalents	525,280	455,991
Investment securities:
Carried at fair value	2,529,910	1,963,546
Held-to-maturity, at amortized cost (fair value of $592,298 and $662,906, respectively)	602,687	677,093
Total investment securities	3,132,597	2,640,639
Loans held-for-sale, at fair value	46,849	52,133
Loans	14,579,693	14,155,267
Allowance for loan losses	(100,015)	(91,887)
Net loans	14,479,678	14,063,380
Premises and equipment	125,970	126,896
Loan servicing rights, at fair value	70,364	63,841
Goodwill	1,134,568	1,134,568
Other intangible assets	31,407	34,271
Interest receivable and other assets	735,890	709,154
Total assets	20,282,603	19,280,873
Deposits:
Noninterest-bearing	3,894,259	3,725,779
Interest-bearing	10,657,277	9,917,024
Total deposits	14,551,536	13,642,803
Collateralized customer deposits	378,938	415,236
Short-term borrowings	2,095,000	2,000,000
Long-term borrowings	330,956	372,882
Interest payable and other liabilities	175,174	181,203
Total liabilities	17,531,604	16,612,124
Shareholders’ equity
Preferred stock, none issued	0	0
Common stock issued	71,418	71,207
Additional paid-in capital	2,205,402	2,203,637
Retained earnings	521,530	419,403
Accumulated other comprehensive loss	(47,351)	(25,498)
Total shareholders’ equity	2,750,999	2,668,749
Total liabilities and shareholders’ equity	$ 20,282,603	$ 19,280,873