Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest and dividend income
Loans	$ 103,435	$ 93,749	$ 306,253	$ 269,137
Taxable securities	6,238	5,826	18,170	17,600
Nontaxable securities	269	61	710	85
Dividends on securities	296	396	839	832
Federal funds sold and other	163	157	728	326
Total interest and dividend income	110,401	100,189	326,700	287,980
Interest expense
Deposits	9,478	6,451	24,596	18,145
Securities sold under agreements to repurchase	86	124	298	395
FHLB advances and other borrowings	994	986	3,735	2,831
Subordinated debentures and subordinated notes payable	1,113	976	3,299	2,662
Total interest expense	11,671	8,537	31,928	24,033
Net interest income	98,730	91,652	294,772	263,947
Provision for loan and lease losses	5,796	5,372	16,854	11,892
Net interest income after provision for loan and lease losses	92,934	86,280	277,918	252,055
Noninterest income
Service charges and other fees	12,730	12,316	36,735	33,098
Wealth management fees	2,433	1,807	7,116	5,087
Mortgage banking income, net	1,828	1,669	6,130	4,143
Net gain (loss) on sale of securities	0	134	44	(196)
Net increase (decrease) in fair value of loans at fair value	6,060	14,198	(63,158)	35,253
Net realized and unrealized gain on derivatives	(9,088)	(21,925)	51,481	(53,379)
Other	1,522	898	4,878	2,733
Total noninterest income	15,485	9,097	43,226	26,739
Noninterest expense
Salaries and employee benefits	32,868	28,352	96,872	78,417
Data processing	6,378	5,625	18,020	15,822
Occupancy expenses	4,057	4,002	12,437	11,436
Professional fees	4,141	3,327	10,535	9,087
Communication expenses	992	788	2,945	2,650
Advertising	1,059	1,047	3,029	3,015
Equipment expense	809	959	2,375	2,794
Net loss recognized on repossessed property and other related expenses	152	379	1,208	479
Amortization of core deposits and other intangibles	538	822	1,927	2,239
Acquisition expenses	0	12,179	710	12,950
Other	3,928	3,742	11,254	11,408
Total noninterest expense	54,922	61,222	161,312	150,297
Income before income taxes	53,497	34,155	159,832	128,497
Provision for income taxes	18,437	7,795	52,707	41,002
Net income	35,060	26,360	107,125	87,495
Other comprehensive income (loss) - change in net unrealized gain (loss) on securities available for sale (net of deferred income tax (expense) benefit of $(721) and $(2,649) for the three months ended June 30, 2017 and 2016, respectively and $6,764 and $(4,115) for the nine months ended June 30, 2017 and 2016, respectively)	1,175	4,322	(11,037)	6,713
Comprehensive income	$ 36,235	$ 30,682	$ 96,088	$ 94,208
Basic earnings per common share
Weighted average shares outstanding (in shares)	58,790,314	57,012,698	58,776,546	55,845,322
Earnings per share (in dollars per share)	$ 0.60	$ 0.46	$ 1.82	$ 1.57
Diluted earnings per common share
Weighted average shares outstanding (in shares)	59,130,632	57,176,705	59,065,402	55,993,011
Diluted earnings per share (in dollars per share)	$ 0.59	$ 0.46	$ 1.81	$ 1.56
Dividends per share
Dividends paid	$ 11,752	$ 7,734	$ 31,722	$ 23,201
Dividends per share (in dollars per share)	$ 0.20	$ 0.14	$ 0.54	$ 0.42