Consolidated Statements of Financial Position - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Cash and cash equivalents:
Cash and cash due from banks	$ 237,758	$ 194,136
Interest-bearing deposits with the Federal Reserve Bank and other banks	236,644	44,653
Total cash and cash equivalents	474,402	238,789
Investment securities:
Available-for-sale, at fair value	1,234,964	553,731
Held-to-maturity, at amortized cost (fair value of $608,531 at 12/31/16 and $512,705 at 12/31/15)	623,427	509,971
Total investment securities	1,858,391	1,063,702
Loans held-for-sale, at fair value	81,830	10,327
Loans	12,990,779	7,271,147
Allowance for loan losses	(78,268)	(73,328)
Net loans	12,912,511	7,197,819
Premises and equipment	145,012	106,317
Loan servicing rights	58,315	11,122
Goodwill	1,133,534	287,393
Other intangible assets	40,211	26,982
Interest receivable and other assets	650,973	246,346
Total assets	17,355,179	9,188,797
Deposits:
Noninterest-bearing	3,341,520	1,934,583
Interest-bearing	9,531,602	5,522,184
Total deposits	12,873,122	7,456,767
Interest payable and other liabilities	134,637	76,466
Securities sold under agreements to repurchase with customers	343,047	297,199
Short-term borrowings	825,000	100,000
Long-term borrowings	597,847	242,391
Total liabilities	14,773,653	8,172,823
Shareholders' equity
Preferred stock, no par value: Authorized – 2,000,000 shares at 12/31/16 and 12/31/15	0	0
Common stock, $1 par value per share: Authorized — 100,000,000 shares at 12/31/16 and 60,000,000 shares at 12/31/15, Issued and outstanding — 70,599,133 shares at 12/31/16 and 38,167,861 shares at 12/31/15	70,599	38,168
Additional paid in capital	2,210,762	725,280
Retained earnings	340,201	281,558
Accumulated other comprehensive loss	(40,036)	(29,032)
Total shareholders' equity	2,581,526	1,015,974
Total liabilities and shareholders' equity	$ 17,355,179	$ 9,188,797