Consolidated Statements of Financial Position - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Cash and cash equivalents:
Cash and cash due from banks	$ 174,173	$ 226,003
Interest-bearing deposits with the Federal Reserve Bank and other banks	379,320	229,988
Total cash and cash equivalents	553,493	455,991
Investment securities:
Carried at fair value	2,297,123	1,963,546
Held-to-maturity, at amortized cost (fair value of $663,621 and $662,906, respectively)	676,847	677,093
Total investment securities	2,973,970	2,640,639
Loans held-for-sale, at fair value	31,636	52,133
Loans	14,218,747	14,155,267
Allowance for loan losses	(94,762)	(91,887)
Net loans	14,123,985	14,063,380
Premises and equipment	126,251	126,896
Loan servicing rights, at fair value	68,837	63,841
Goodwill	1,134,568	1,134,568
Other intangible assets	32,833	34,271
Interest receivable and other assets	710,511	709,154
Total assets	19,756,084	19,280,873
Deposits:
Noninterest-bearing	3,801,125	3,725,779
Interest-bearing	10,166,692	9,917,024
Total deposits	13,967,817	13,642,803
Collateralized customer deposits	490,107	415,236
Short-term borrowings	2,050,000	2,000,000
Long-term borrowings	372,908	372,882
Interest payable and other liabilities	171,975	181,203
Total liabilities	17,052,807	16,612,124
Shareholders’ equity
Preferred stock, no par value: Authorized – 2,000,000 shares at 6/30/2017 and 12/31/2016, none issued	0	0
Common stock, $1.00 par value per share: Authorized — 135,000,000 shares at 6/30/2017 and 100,000,000 shares at 12/31/2016, Issued and outstanding — XX,XXX,XXX shares at 6/30/2017 and 70,599,133 shares at 12/31/2016	71,350	71,207
Additional paid-in capital	2,201,803	2,203,637
Retained earnings	471,178	419,403
Accumulated other comprehensive loss	(41,054)	(25,498)
Total shareholders’ equity	2,703,277	2,668,749
Total liabilities and shareholders’ equity	$ 19,756,084	$ 19,280,873