CONSOLIDATED CONDENSED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest income:
Interest and fees on loans	$ 323,974	$ 192,580	$ 623,467	$ 373,044
Interest on investment securities available-for-sale	32,634	25,657	65,481	51,292
Interest on investment securities held-to-maturity	132	132	263	329
Interest on loans held-for-sale	11,228	3,510	23,372	4,793
Interest on trading securities	14,742	9,418	29,150	15,771
Interest on other earning assets	5,101	4,044	9,433	8,923
Total interest income	387,811	235,341	751,166	454,152
Interest on deposits:
Savings	25,600	11,194	40,500	20,404
Time deposits	11,236	2,918	20,761	5,751
Other interest-bearing deposits	11,913	5,074	22,521	9,217
Interest on trading liabilities	4,790	4,203	9,914	7,984
Interest on short-term borrowings	10,110	2,903	20,152	4,295
Interest on term borrowings	13,230	8,348	25,213	16,092
Total interest expense	76,879	34,640	139,061	63,743
Net interest income	310,932	200,701	612,105	390,409
Provision/(provision credit) for loan losses	0	(2,000)	(1,000)	(3,000)
Net interest income after provision/(provision credit) for loan losses	310,932	202,701	613,105	393,409
Noninterest income:
Fixed income	37,697	55,110	83,203	105,788
Deposit transactions and cash management	36,083	27,858	72,067	52,423
Brokerage, management fees and commissions	13,740	12,029	27,223	23,935
Bankcard income	8,132	7,698	15,409	14,351
Trust services and investment management	6,635	5,605	13,080	11,060
Bank-owned life insurance	5,773	4,351	9,766	7,598
Debt securities gains/(losses), net	0	405	52	449
Equity securities gains/(losses), net	31	0	65	0
All other income and commissions	19,434	14,617	42,677	29,008
Total noninterest income	127,525	127,673	263,542	244,612
Adjusted gross income after provision/(provision credit) for loan losses	438,457	330,374	876,647	638,021
Noninterest expense:
Employee compensation, incentives, and benefits	165,890	138,276	337,144	272,770
Occupancy	22,503	12,800	42,954	25,140
Professional fees	15,415	9,659	27,687	14,405
Computer software	15,123	12,285	30,255	23,084
Operational services	14,653	11,524	30,214	22,399
Equipment rentals, depreciation, and maintenance	10,708	7,036	20,726	13,387
FDIC premium expense	9,978	5,927	18,592	11,666
Communications and courier	7,530	4,117	15,762	7,917
Amortization of intangible assets	6,460	1,964	12,934	3,196
Contract employment and outsourcing	5,907	3,255	9,960	6,213
Advertising and public relations	5,070	4,095	8,669	8,696
Legal fees	2,784	3,496	5,129	8,779
Repurchase and foreclosure provision/(provision credit)	(252)	(21,733)	(324)	(21,971)
All other expense	50,999	25,216	86,331	44,441
Total noninterest expense	332,768	217,917	646,033	440,122
Income/(loss) before income taxes	105,689	112,457	230,614	197,899
Provision/(benefit) for income taxes	19,697	17,253	49,628	44,307
Net income/(loss)	85,992	95,204	180,986	153,592
Net income attributable to noncontrolling interest	2,852	2,852	5,672	5,672
Net income/(loss) attributable to controlling interest	83,140	92,352	175,314	147,920
Preferred stock dividends	1,550	1,550	3,100	3,100
Net income/(loss) available to common shareholders	$ 81,590	$ 90,802	$ 172,214	$ 144,820
Basic earnings/(loss) per share (in dollars per share)	$ 0.25	$ 0.39	$ 0.53	$ 0.62
Diluted earnings/(loss) per share (in dollars per share)	$ 0.25	$ 0.38	$ 0.52	$ 0.61
Weighted average common shares (in shares)	325,153	233,482	325,817	233,280
Diluted average common shares (in shares)	328,426	236,263	329,353	236,225
Cash dividends declared per common share (in dollars per share)	$ 0.12	$ 0.09	$ 0.24	$ 0.18