Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income:
Loans and leases	$ 819,094	$ 657,097	$ 272,726
Investment securities	64,368	47,345	36,923
Deposits in financial institutions	476	333	265
Total interest income	883,938	704,775	309,914
Interest expense:
Deposits	41,503	27,332	7,868
Borrowings	554	496	537
Subordinated debentures	18,535	14,570	3,796
Total interest expense	60,592	42,398	12,201
Net interest income	823,346	662,377	297,713
Provision (negative provision) for credit losses	45,481	11,499	(4,210)
Net interest income after provision (negative provision) for credit losses	777,865	650,878	301,923
Noninterest income:
Service charges on deposit accounts	11,688	11,233	11,765
Other commissions and fees	31,586	18,602	8,416
Leased equipment income	24,023	16,669	0
Gain on sale of loans and leases	373	601	1,791
Gain on securities	3,744	4,841	5,359
FDIC loss sharing expense, net	(18,246)	(31,730)	(26,172)
Other income	31,142	21,971	3,085
Total noninterest income	84,310	42,187	4,244
Noninterest expense:
Compensation	203,914	165,499	107,067
Occupancy	44,144	40,606	29,459
Data processing	18,617	14,618	9,494
Other professional services	13,760	11,234	6,754
Insurance and assessments	16,996	10,907	5,596
Intangible asset amortization	9,410	6,268	5,402
Leased equipment depreciation	13,603	9,159	0
Foreclosed assets (income) expense, net	(668)	5,401	(1,503)
Acquisition, integration and reorganization costs	21,247	101,016	40,812
Other expense	41,016	40,884	25,084
Total noninterest expense	382,039	405,592	228,165
Earnings from continuing operations before taxes	480,136	287,473	78,002
Income tax expense	(180,517)	(117,005)	(32,525)
Net earnings from continuing operations	299,619	170,468	45,477
Loss from discontinued operations before taxes	0	(2,677)	(620)
Income tax benefit	0	1,114	258
Net loss from discontinued operations	0	(1,563)	(362)
Net earnings	$ 299,619	$ 168,905	$ 45,115
Net earnings from continuing operations (usd per share)	$ 2.79	$ 1.94	$ 1.09
Basic income per share (usd per share)	2.79	1.92	1.08
Net earnings from continuing operations (usd per share)	2.79	1.94	1.09
Diluted income per share (usd per share)	2.79	1.92	1.08
Dividends declared per share (usd per share)	$ 2.00	$ 1.25	$ 1