Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest and dividend income
Loans	$ 93,749	$ 85,240	$ 269,137	$ 251,978
Taxable securities	5,826	5,984	17,600	17,050
Nontaxable securities	61	10	85	36
Dividends on securities	396	489	832	997
Federal funds sold and other	157	155	326	599
Total interest and dividend income	100,189	91,878	287,980	270,660
Interest expense
Deposits	6,451	5,776	18,145	17,775
Securities sold under agreements to repurchase	124	134	395	430
FHLB advances and other borrowings	986	867	2,831	2,706
Related party notes payable	0	233	0	692
Subordinated debentures and subordinated notes payable	976	330	2,662	985
Total interest expense	8,537	7,340	24,033	22,588
Net interest income	91,652	84,538	263,947	248,072
Provision for loan and lease losses	5,372	4,410	11,892	17,408
Net interest income after provision for loan and lease losses	86,280	80,128	252,055	230,664
Noninterest income
Service charges and other fees	12,316	9,627	33,098	28,896
Wealth management fees	1,807	1,972	5,087	5,754
Mortgage banking income, net	1,669	1,903	4,143	5,027
Net gain (loss) on sale of securities	134	0	(196)	51
Net increase (decrease) in fair value of loans at fair value	14,198	(24,394)	35,253	7,914
Net realized and unrealized gain (loss) on derivatives	(21,925)	18,946	(53,379)	(27,357)
Other	898	1,951	2,733	4,556
Total noninterest income	9,097	10,005	26,739	24,841
Noninterest expense
Salaries and employee benefits	28,352	26,612	78,417	75,373
Data processing	5,625	4,657	15,822	14,193
Occupancy expenses	4,002	3,161	11,436	11,169
Professional fees	3,327	3,289	9,087	10,464
Communication expenses	788	1,031	2,650	3,429
Advertising	1,047	1,196	3,015	2,870
Equipment expense	959	1,075	2,794	2,956
Net loss recognized on repossessed property and other related expenses	379	1,067	479	5,547
Amortization of core deposits and other intangibles	822	1,776	2,239	6,402
Acquisition expenses	12,179	0	12,950	0
Other	3,742	2,566	11,408	9,556
Total noninterest expense	61,222	46,430	150,297	141,959
Income before income taxes	34,155	43,703	128,497	113,546
Provision for income taxes	7,795	14,871	41,002	38,293
Net income	26,360	28,832	87,495	75,253
Other comprehensive income (loss) - change in net unrealized gain (loss) on securities available for sale (net of deferred income tax (expense) benefit of $(2,649), and $2,254 for the three months ended June 30, 2016 and 2015, respectively and $(4,115) and $(2,712) for the nine months ended June 30, 2016 and 2015, respectively)	4,322	(3,845)	6,713	4,423
Comprehensive income	$ 30,682	$ 24,987	$ 94,208	$ 79,676
Basic earnings per common share
Weighted average shares outstanding	57,012,698	57,898,335	55,845,322	57,897,484
Earnings per share (in dollars per share)	$ 0.46	$ 0.50	$ 1.57	$ 1.30
Diluted earnings per common share
Weighted average shares outstanding (in shares)	57,176,705	57,959,202	55,993,011	57,929,188
Diluted earnings per share (in dollars per share)	$ 0.46	$ 0.50	$ 1.56	$ 1.30
Dividends per share
Dividends paid	$ 7,734	$ 6,946	$ 23,201	$ 13,893
Dividends per share (in dollars per share)	$ 0.14	$ 0.12	$ 0.42	$ 0.24