Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Activities
Net income per consolidated statements of income	$ 76,643	$ 55,283
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses, net	6,837	1,514
Depreciation and amortization	19,534	18,729
Net amortization of securities	5,086	5,375
Securities (gains) losses, net	0	(1)	[1]
Gains on sales of loans, net	(9,999)	(8,550)
Deferred income tax provision	4,000	4,200
Proceeds from sales of loans held for sale	525,611	565,150
Purchases and originations of loans held for sale	(534,903)	(588,773)
Originations of mortgage servicing rights	(7,719)	(7,497)
Earnings on bank-owned life insurance	(2,639)	(2,487)
Net change in other assets	7,087	22,130
Net change in other liabilities	(2,658)	(5,676)
Other operating activities, net	(9,478)	2,588
Net cash provided by operating activities	77,402	61,985
Investing Activities
Proceeds from maturities, prepayments and calls of securities held to maturity	71,817	90,340
Proceeds from maturities, prepayments and calls of securities available for sale	226,479	230,945
Proceeds from sales of securities available for sale	0	26,409
Purchases of securities held to maturity	0	(69,989)
Purchases of securities available for sale	(4,159)	(292,170)
Net proceeds from bank-owned life insurance	1,586	0
Net change in federal funds sold and securities purchased under reverse repurchase agreements	615	500
Net change in member bank stock	27,114	474
Net change in loans	(28,727)	(374,640)
Purchases of premises and equipment	(6,224)	(8,142)
Proceeds from sales of premises and equipment	651	7,696
Proceeds from sales of other real estate	10,681	15,948
Purchases of software	(7,359)	(2,267)
Investments in tax credit and other partnerships	(17)	(2,893)
Net cash used in business acquisition	0	(19,775)
Net cash provided by (used in) investing activities	292,457	(397,564)
Financing Activities
Net change in deposits	494,923	201,221
Net change in federal funds purchased and securities sold under repurchase agreements	8,064	(31,749)
Net change in short-term borrowings	(780,816)	192,799
Payments on long-term FHLB advances	(33)	(33)
Redemption of junior subordinated debt securities	0	(3,000)
Common stock dividends	(31,347)	(31,397)
Repurchase and retirement of common stock	(7,877)	0
Shares withheld to pay taxes, long-term incentive plan	(1,422)	(1,639)
Net cash provided by (used in) financing activities	(318,508)	326,202
Net change in cash and cash equivalents	51,351	(9,377)
Cash and cash equivalents at beginning of period	335,768	327,706
Cash and cash equivalents at end of period	$ 387,119	$ 318,329

[1] Trustmark elected the modified retrospective approach of adoption; therefore, prior period balances are presented under legacy GAAP and may not be comparable to current year presentation.