Pinnacle Financial Partners (PNFP) 10-Q 1 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 31, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	000-31225
Entity Registrant Name	Pinnacle Financial Partners Inc.
Entity Incorporation, State or Country Code	TN
Entity Tax Identification Number	62-1812853
Entity Address, Address Line One	150 Third Avenue South, Suite 900
Entity Address, City or Town	Nashville,
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	37201
City Area Code	(615)
Local Phone Number	744-3700
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $1.00
Trading Symbol	PNFP
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		76,565,438
Entity Central Index Key	0001115055
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets [Abstract]
Cash and noninterest-bearing due from banks	$ 197,660	$ 137,433
Restricted Cash, Current	157,544	65,491
Interest-bearing due from banks	553,124	516,920
Federal funds sold and other	11,975	1,848
Cash and cash equivalents	920,303	721,692
Securities available-for-sale, at fair value	3,393,435	3,083,686
Securities held-to-maturity (fair value of $202.8 million and $193.1 million at Sept. 30, 2019 and Dec. 31, 2018, respectively)	189,684	194,282
Consumer loans held-for-sale	73,042	34,196
Commercial loans held-for-sale	21,312	15,954
Loans	19,345,642	17,707,549
Less allowance for loan losses	(93,647)	(83,575)
Loans, net	19,251,995	17,623,974
Premises and equipment, net	274,983	265,560
Equity method investment	267,097	239,237
Accrued interest receivable	81,124	79,657
Goodwill	1,830,652	1,807,121
Core deposits and other intangible assets	39,349	46,161
Other real estate owned	30,049	15,165
Other assets	1,174,809	904,359
Total assets	27,547,834	25,031,044
Deposits:
Noninterest-bearing	4,702,155	4,309,067
Interest-bearing	3,372,028	3,464,001
Savings and money market accounts	7,625,872	7,607,796
Time	4,300,622	3,468,243
Total deposits	20,000,677	18,849,107
Securities sold under agreements to repurchase	95,402	104,741
Federal Home Loan Bank advances	2,052,548	1,443,589
Subordinated debt and other borrowings	750,488	485,130
Accrued interest payable	36,836	23,586
Other liabilities	317,253	158,951
Total liabilities	23,253,204	21,065,104
Stockholders' equity:
Preferred stock, no par value; 10.0 million shares authorized; no shares issued and outstanding	0	0
Common stock, par value $1.00; 180.0 million shares authorized at Sept. 30, 2019 and Dec. 31, 2018; 76.7 million and 77.5 million shares issued and outstanding at Sept. 30, 2019 and Dec. 31, 2018, respectively	76,736	77,484
Additional paid-in capital	3,070,235	3,107,431
Retained earnings	1,100,517	833,130
Accumulated other comprehensive income (loss), net of taxes	47,142	(52,105)
Total stockholders' equity	4,294,630	3,965,940
Total liabilities and stockholders' equity	$ 27,547,834	$ 25,031,044

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Securities held-to-maturity, fair value	$ 202,821	$ 193,131
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	180,000,000	180,000,000
Common stock, shares issued (in shares)	76,736,000	77,484,000
Common stock, shares outstanding (in shares)	76,736,000	77,484,000

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest income:
Loans, including fees	$ 247,147	$ 221,901	$ 714,179	$ 621,873
Securities:
Taxable	10,655	12,209	36,438	35,179
Tax-exempt	13,313	10,074	37,541	25,709
Federal funds sold and other	4,634	3,926	11,325	7,861
Total interest income	275,749	248,110	799,483	690,622
Interest expense:
Deposits	62,531	44,172	175,736	100,920
Securities sold under agreements to repurchase	152	165	439	438
Federal Home Loan Bank advances and other borrowings	17,260	14,353	51,338	43,137
Total interest expense	79,943	58,690	227,513	144,495
Net interest income	195,806	189,420	571,970	546,127
Provision for loan losses	8,260	8,725	22,639	25,058
Net interest income after provision for loan losses	187,546	180,695	549,331	521,069
Noninterest income:
Total noninterest income	82,619	51,478	204,364	143,600
Noninterest expense:
Salaries and employee benefits	85,919	69,117	231,915	196,948
Equipment and occupancy	20,348	19,252	63,523	55,203
Other real estate expense, net	655	67	3,424	92
Marketing and other business development	2,723	3,293	8,953	8,084
Postage and supplies	1,766	1,654	5,737	5,984
Amortization of intangibles	2,430	2,616	7,012	7,973
Merger-related expense	0	0	0	8,259
Other noninterest expense	19,100	17,991	54,114	50,935
Total noninterest expense	132,941	113,990	374,678	333,478
Income before income taxes	137,224	118,183	379,017	331,191
Income tax expense	26,703	24,436	74,215	67,069
Net income	$ 110,521	$ 93,747	$ 304,802	$ 264,122
Per share information:
Basic net income per common share (in dollars per share)	$ 1.45	$ 1.22	$ 3.99	$ 3.42
Diluted net income per common share (in dollars per share)	$ 1.44	$ 1.21	$ 3.97	$ 3.41
Weighted average shares outstanding:
Basic (in shares)	76,301,010	77,145,023	76,480,757	77,116,377
Diluted (in shares)	76,556,309	77,490,977	76,761,167	77,442,554
Service charges on deposit accounts
Noninterest income:
Total noninterest income	$ 10,193	$ 9,972	$ 27,675	$ 26,333
Investment services
Noninterest income:
Total noninterest income	6,270	5,450	17,607	15,817
Insurance sales commissions
Noninterest income:
Total noninterest income	2,252	2,126	7,327	7,293
Gain on mortgage loans sold, net
Noninterest income:
Total noninterest income	7,402	3,902	18,291	11,423
Gain on sale of investment securities, net
Noninterest income:
Total noninterest income	417	11	(6,009)	41
Trust fees
Noninterest income:
Total noninterest income	3,593	3,087	10,349	9,768
Income from equity method investment
Noninterest income:
Total noninterest income	32,248	14,236	77,799	33,286
Other noninterest income
Noninterest income:
Total noninterest income	$ 20,244	$ 12,694	$ 51,325	$ 39,639

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income	$ 110,521	$ 93,747	$ 304,802	$ 264,122
Other comprehensive income (loss), net of tax:
Change in fair value on available-for-sale securities, net of tax	25,259	(16,899)	87,153	(53,167)
Change in fair value of cash flow hedges, net of tax	494	783	6,584	3,453
Amortization of net unrealized losses (gains) on securities transferred from available-for-sale to held-to-maturity, net of tax	56	(10)	126	(103)
Gain on cash flow hedges reclassified from other comprehensive income into net income, net of tax	1,129	(145)	946	(429)
Net loss (gain) on sale of investment securities reclassified from other comprehensive income into net income, net of tax	(308)	(8)	4,438	(30)
Total other comprehensive income (loss), net of tax	26,630	(16,279)	99,247	(50,276)
Total comprehensive income	$ 137,151	$ 77,468	$ 404,049	$ 213,846

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comp. Income (Loss), net
Balance at Dec. 31, 2017	$ 3,707,952	$ 77,740	$ 3,115,304	$ 519,144	$ (4,236)
Balance (in shares) at Dec. 31, 2017		77,740,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options and related tax benefits	1,700	$ 90	1,610
Exercise of employee common stock options and related tax benefits (in shares)		90,000
Common dividends paid	(32,903)			(32,903)
Issuance of restricted common shares, net of forfeitures	0	$ 141	(141)
Issuance of restricted common shares, net of forfeitures (in shares)		141,000
Restricted shares withheld for taxes & related tax benefit	(6,808)	$ (104)	(6,704)
Restricted shares withheld for taxes (in shares)		(104,000)
Stock-based compensation expense	13,254		13,254
Net income	264,122			264,122
Other comprehensive income (loss)	(50,276)				(50,276)
Balance at Sep. 30, 2018	3,897,041	$ 77,867	3,123,323	750,363	(54,512)
Balance (in shares) at Sep. 30, 2018		77,867,000
Balance at Jun. 30, 2018	3,826,677	$ 77,855	3,119,461	667,594	(38,233)
Balance (in shares) at Jun. 30, 2018		77,855,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options and related tax benefits	0	$ 0	0
Exercise of employee common stock options and related tax benefits (in shares)		0
Common dividends paid	(10,978)			(10,978)
Issuance of restricted common shares, net of forfeitures	0	$ 22	(22)
Issuance of restricted common shares, net of forfeitures (in shares)		22,000
Restricted shares withheld for taxes & related tax benefit	(629)	$ (10)	(619)
Restricted shares withheld for taxes (in shares)		(10,000)
Stock-based compensation expense	4,503		4,503
Net income	93,747			93,747
Other comprehensive income (loss)	(16,279)				(16,279)
Balance at Sep. 30, 2018	3,897,041	$ 77,867	3,123,323	750,363	(54,512)
Balance (in shares) at Sep. 30, 2018		77,867,000
Balance at Dec. 31, 2018	3,965,940	$ 77,484	3,107,431	833,130	(52,105)
Balance (in shares) at Dec. 31, 2018		77,484,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options and related tax benefits	247	$ 10	237
Exercise of employee common stock options and related tax benefits (in shares)		10,000
Common dividends paid	(37,415)			(37,415)
Repurchase of common stock	(48,489)	$ (873)	(47,616)
Repurchase of common stock (in shares)		(873,000)
Issuance of restricted common shares, net of forfeitures	0	$ 200	(200)
Issuance of restricted common shares, net of forfeitures (in shares)		200,000
Restricted shares withheld for taxes & related tax benefit	(4,793)	$ (85)	(4,708)
Restricted shares withheld for taxes (in shares)		(85,000)
Stock-based compensation expense	15,091		15,091
Net income	304,802			304,802
Other comprehensive income (loss)	99,247				99,247
Balance at Sep. 30, 2019	4,294,630	$ 76,736	3,070,235	1,100,517	47,142
Balance (in shares) at Sep. 30, 2019		76,736,000
Balance at Jun. 30, 2019	4,176,361	$ 76,929	3,076,486	1,002,434	20,512
Balance (in shares) at Jun. 30, 2019		76,929,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options and related tax benefits	108	$ 4	104
Exercise of employee common stock options and related tax benefits (in shares)		4,000
Common dividends paid	(12,438)			(12,438)
Repurchase of common stock	(11,065)	$ (198)	(10,867)
Repurchase of common stock (in shares)		(198,000)
Issuance of restricted common shares, net of forfeitures	0	$ 10	(10)
Issuance of restricted common shares, net of forfeitures (in shares)		10,000
Restricted shares withheld for taxes & related tax benefit	(505)	$ (9)	(496)
Restricted shares withheld for taxes (in shares)		(9,000)
Stock-based compensation expense	5,018		5,018
Net income	110,521			110,521
Other comprehensive income (loss)	26,630				26,630
Balance at Sep. 30, 2019	$ 4,294,630	$ 76,736	$ 3,070,235	$ 1,100,517	$ 47,142
Balance (in shares) at Sep. 30, 2019		76,736,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income	$ 304,802	$ 264,122
Adjustments to reconcile net income to net cash provided by operating activities:
Net amortization/accretion of premium/discount on securities	14,365	14,366
Depreciation, amortization and accretion expense (income)	4,365	(20,959)
Provision for loan losses	22,639	25,058
Gain on mortgage loans sold, net	(18,291)	(11,423)
Investment losses (gains) on sales, net	(6,009)	41
Stock-based compensation expense	15,091	13,254
Deferred tax expense	5,355	17,339
Losses (gains) on dispositions of other real estate and other investments	2,612	(259)
Income from equity method investment	(77,799)	(33,286)
Dividends received from equity method investment	49,940	33,651
Excess tax benefit from stock compensation	(832)	(2,953)
Gain on commercial loans sold, net	(2,841)	(1,985)
Commercial loans held for sale:
Loans originated	(315,454)	(226,551)
Loans sold	312,936	242,590
Consumer loans held for sale:
Loans originated	(1,001,377)	(941,991)
Loans sold	980,822	964,747
Increase in other assets	(79,462)	(31,805)
Increase in other liabilities	91,624	14,626
Net cash provided by operating activities	314,504	318,500
Activities in securities available-for-sale:
Purchases	(1,039,225)	(1,023,876)
Sales	626,097	22,702
Maturities, prepayments and calls	253,350	243,678
Activities in securities held-to-maturity:
Purchases	(3,822)	0
Maturities, prepayments and calls	7,800	5,280
Increase in loans, net	(1,488,436)	(1,757,157)
Purchases of software, premises and equipment	(34,190)	(18,478)
Proceeds from sales of software, premises and equipment	66	458
Proceeds from sale of other real estate	4,947	13,204
Payments to Acquire Businesses, Net of Cash Acquired	(44,594)
Cash Acquired from Acquisition		0
Purchase of bank owned life insurance policies	(110,000)	(100,000)
Proceeds from bank owned life insurance settlements	308	0
Payments related to derivative instruments	(37,982)	0
Increase in other investments	(43,260)	(47,687)
Net cash used in investing activities	(1,908,941)	(2,661,876)
Financing activities:
Net increase in deposits	1,152,021	1,957,566
Net decrease in securities sold under agreements to repurchase	(9,339)	(5,045)
Advances from Federal Home Loan Bank:
Issuances	2,572,500	1,439,906
Payments/maturities	(1,963,541)	(1,239,198)
Increase in other borrowings, net of issuance costs	316,200	0
Repayments of Notes Payable	(184,175)	(240)
Principal payments of finance lease obligation	(168)	(118)
Exercise of common stock options, net of repurchase of restricted shares	(4,546)	(5,108)
Payments for Repurchase of Common Stock	(48,489)	0
Common stock dividends paid	(37,415)	(32,903)
Net cash provided by financing activities	1,793,048	2,114,860
Net increase (decrease) in cash, cash equivalents, and restricted cash	198,611	(228,516)
Cash, cash equivalents, and restricted cash, beginning of period	721,692	779,596
Cash, cash equivalents, and restricted cash, end of period	$ 920,303	$ 551,080

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1. Summary of Significant Accounting Policies Nature of Business — Pinnacle Financial Partners, Inc. (Pinnacle Financial) is a financial holding company whose primary business is conducted by its wholly-owned subsidiary, Pinnacle Bank. Pinnacle Bank is a commercial bank headquartered in Nashville, Tennessee. Pinnacle Financial completed its acquisitions of CapitalMark Bank & Trust (CapitalMark), Magna Bank (Magna), Avenue Financial Holdings, Inc. (Avenue) and BNC Bancorp (BNC) on July 31, 2015, September 1, 2015, July 1, 2016 and June 16, 2017, respectively. Pinnacle Financial and Pinnacle Bank also collectively hold a 49% interest in Bankers Healthcare Group, LLC (BHG), a full-service loan provider primarily engaged in the business of making loans to healthcare and other professional practices. Pinnacle Bank provides a full range of banking services, including investment, mortgage, insurance, and comprehensive wealth management services, in its 11 primarily urban markets within Tennessee, the Carolinas and Virginia. On July 2, 2019, Pinnacle Bank acquired all of the outstanding stock of Advocate Capital, Inc. (Advocate Capital) for a cash price of $59 million. Advocate Capital is a finance firm headquartered in Nashville, TN which supports the financial needs of legal firms through both case expense financing and working capital lines of credit. Pinnacle Financial accounted for the acquisition of Advocate Capital under the acquisition method in accordance with ASC Topic 805. Accordingly, the purchase price is allocated to the fair value of the assets acquired and liabilities acquired as of the date of acquisition. Determining the fair value of assets and liabilities, particularly illiquid assets and liabilities, is a complicated process involving significant judgment regarding estimates and assumptions used to calculate estimated fair value. Fair value adjustments based on updated estimates could materially affect the goodwill recorded on the Advocate Capital acquisition. At the acquisition date, Advocate Capital's net assets were initially recorded at a fair value of approximately $34.6 million, consisting mainly of loans receivable. Advocate Capital's $134.3 million of indebtedness was also paid off in connection with consummation of the acquisition. The purchase price allocations for the acquisition of Advocate Capital are preliminary and will be finalized upon the receipt of final valuations on certain assets and liabilities. Basis of Presentation — The accompanying unaudited consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles (U.S. GAAP). All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods covered by the report have been included. The accompanying unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes appearing in Pinnacle Financial's Annual Report on Form 10-K for the year ended December 31, 2018 (2018 10-K). These consolidated financial statements include the accounts of Pinnacle Financial and its wholly-owned subsidiaries. Certain statutory trust affiliates of Pinnacle Financial, as noted in Note 11. Subordinated Debt and Other Borrowings are included in these consolidated financial statements pursuant to the equity method of accounting. Significant intercompany transactions and accounts are eliminated in consolidation. Use of Estimates — The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term include the determination of the allowance for loan losses and determination of any impairment of intangible assets. There have been no significant changes to Pinnacle Financial's significant accounting policies as disclosed in the 2018 10-K. Cash Flow Information — Supplemental cash flow information addressing certain cash and noncash transactions for the nine months ended September 30, 2019 and September 30, 2018 was as follows (in thousands): For the nine months ended 2019 2018 Cash Transactions: Interest paid $ 216,261 $ 136,154 Income taxes paid, net 61,238 55,525 Noncash Transactions: Loans charged-off to the allowance for loan losses 21,328 22,316 Loans foreclosed upon and transferred to other real estate owned 16,870 2,066 Loans foreclosed upon and transferred to other assets 93 1,580 Other real estate sales financed — 276 Fixed assets transferred to other real estate owned 5,126 — Available-for-sale securities transferred to held-to-maturity portfolio — 179,763 Held-for-sale loans transferred to held-for-investment loan portfolio — 44,980 Right-of-use asset recognized during the period in exchange for lease obligations (1) 82,856 — (1) Includes $79.9 million recognized upon initial adoption of ASU 2016-02 on January 1, 2019. Income Per Common Share — Basic net income per common share (EPS) is computed by dividing net income by the weighted average common shares outstanding for the period. Diluted EPS reflects the dilution that could occur if securities or other contracts to issue common stock were exercised or converted. The difference between basic and diluted weighted average common shares outstanding is attributable to common stock options, restricted share awards, and restricted share unit awards. The dilutive effect of outstanding options, restricted share awards, and restricted share unit awards is reflected in diluted EPS by application of the treasury stock method. The following is a summary of the basic and diluted net income per share calculations for the three and nine months ended September 30, 2019 and 2018 (in thousands, except per share data): Three months ended Nine months ended 2019 2018 2019 2018 Basic net income per share calculation: Numerator - Net income $ 110,521 $ 93,747 $ 304,802 $ 264,122 Denominator - Weighted average common shares outstanding 76,301 77,145 76,481 77,116 Basic net income per common share $ 1.45 $ 1.22 $ 3.99 $ 3.42 Diluted net income per share calculation: Numerator – Net income $ 110,521 $ 93,747 $ 304,802 $ 264,122 Denominator - Weighted average common shares outstanding 76,301 77,145 76,481 77,116 Dilutive shares contingently issuable 255 346 280 326 Weighted average diluted common shares outstanding 76,556 77,491 76,761 77,443 Diluted net income per common share $ 1.44 $ 1.21 $ 3.97 $ 3.41 Recently Adopted Accounting Pronouncements — In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases which requires recognition in the statement of financial position of lease right of use assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP guidance. The guidance requires that a lessee should recognize lease assets and lease liabilities as compared to previous GAAP guidance that did not require lease assets and lease liabilities to be recognized for operating leases. In July 2016, the FASB issued Accounting Standards Update 2018-10, Codification Improvements to Topic 842, Leases which provided technical corrections and improvements to ASU 2016-02. In July 2016, the FASB issued Accounting Standards Update 2018-11, Leases (Topic 842): Targeted Improvements which provided an optional transition method to adopt the new requirements of ASU 2016-02 as of the adoption date with no adjustment to the presentation or disclosure of comparative prior periods included in the financial statements in the period of adoption. Pinnacle Financial has elected this optional transition method and has presented periods prior to adoption under the prior lease guidance of ASC Topic 840. In December 2018, the FASB issued Accounting Standards Update 2018-20, Leases (Topic 842): Narrow-Scope Improvements for Lessors . ASU 2018-20 permits lessors to account for certain taxes as lessee costs, permits lessors to exclude from revenue certain lessor costs paid by lessees directly to third parties, and requires lessors to allocate certain variable payments to lease and non-lease components. In March 2019, the FASB issued Accounting Standards Update No. 2019-01, Leases (Topic 842): Codification Improvements. The amendments in this ASU (i) reinstate the exception in Topic 842 for lessors that are not manufacturers or dealers to use cost as the fair value of the underlying asset, (ii) state that lessors that are depository and lending institutions should present principal payments received under sales type and direct financing leases within investing activities, and (iii) exempt Topic 842 from certain transition related interim disclosure requirements. ASU 2016-02 and the subsequently issued ASUs related to Topic 842 became effective for Pinnacle Financial on January 1, 2019. As part of the adoption of these updates, Pinnacle Financial has elected the following practical expedients: 1) to not reassess whether existing contracts are or contain a lease, 2) to not reassess lease classification for existing leases, 3) to not reassess initial direct costs, 4) to not separate lease components from nonlease components for real estate leases, and 5) to not recognize short term leases (12 months or less) on the balance sheet. See Note 12 for additional detail related to lease amounts recognized as of September 30, 2019 under Topic 842. In February 2018, the FASB issued Accounting Standards Update 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . The amendments in this ASU addressed the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the lower federal corporate tax rate included in the Tax Cuts and Jobs Act issued December 22, 2017 (Tax Act). These amendments allow an entity to make a reclassification from other comprehensive income to retained earnings for the difference between the historical corporate income tax rate and the lower corporate income tax rate included in the Tax Act. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those years. Pinnacle Financial has elected not to adopt this standard due to its insignificant impact on Pinnacle Financial's consolidated financial position. Newly Issued not yet Effective Accounting Standards — In January 2017, the FASB issued Accounting Standards Update No. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment to simplify how entities other than private companies, such as public business entities and not-for-profit entities, are required to test goodwill for impairment by eliminating the comparison of the implied fair value of the reporting unit's goodwill with the carrying amount of that goodwill. The amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those periods. If this standard had been effective as of the date of the financial statements included in this report, there would have been no impact on Pinnacle Financial's consolidated financial statements. In June 2016, the FASB issued Accounting Standards Update 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments (CECL) , which introduces the current expected credit losses methodology. Among other things, CECL requires the measurement of all expected credit losses for financial assets, including loans and held-to-maturity debt securities, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The new model will require institutions to calculate all probable and estimable losses that are expected to be incurred through the financial asset's entire life through a provision for credit losses, including loans obtained as a result of any acquisition not deemed to be purchased credit deteriorated (PCD). CECL also requires the allowance for credit losses for PCD loans to be determined in a manner similar to that of other financial assets measured at amortized cost; however, the initial allowance will be added to the purchase price rather than recorded as provision expense. The disclosure of credit quality indicators related to the amortized cost of financing receivables will be further disaggregated by year of origination (or vintage). Institutions are to apply the changes through a cumulative-effect adjustment to their retained earnings as of the beginning of the first reporting period in which the standard is effective. The amendments are effective for fiscal years beginning after December 15, 2019. Early application is permitted for fiscal years beginning after December 15, 2018. Management continues to evaluate the impact this ASU will have on Pinnacle Financial’s financial position, results of operations and financial statement disclosures and determine the most appropriate method to implement the guidance. Pinnacle Financial has established a cross-functional Current Expected Credit Loss (CECL) Steering Committee, which includes members from the accounting, treasury, credit and lending functions, with involvement from members of model risk management, independent loan review and internal audit. Pinnacle Financial is leveraging both internal and external expertise in the development of the models that will be utilized in the determination of the allowance for credit losses determined pursuant to CECL. At this time, Pinnacle Financial is focused on the finalization of the model validations as well as development of process and related controls and the financial statement disclosures. Pinnacle Financial has concluded that an increase in the overall allowance for loan losses is likely upon adoption of CECL in order to provide for expected credit losses over the life of the loan portfolio. Other than those pronouncements discussed above and those which have been recently adopted, we do not believe there were any other recently issued accounting pronouncements that are expected to materially impact Pinnacle Financial. Reclassifications — Some items in the prior year financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior year net income or stockholders' equity. Subsequent Events — ASC Topic 855, Subsequent Events, establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued. Pinnacle Financial evaluated all events or transactions that occurred after September 30, 2019 through the date of the issued financial statements.

Equity method investment

Equity method investment	9 Months Ended
	Sep. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Equity method investment	Note 2. Equity method investment A summary of BHG's financial position as of September 30, 2019 and December 31, 2018 and results of operations as of and for the three and nine months ended September 30, 2019 and 2018 , were as follows (in thousands): As of September 30, 2019 December 31, 2018 Assets $ 695,300 $ 459,816 Liabilities 499,460 324,211 Equity interests 195,840 135,605 Total liabilities and equity $ 695,300 $ 459,816 For the three months ended For the nine months ended 2019 2018 2019 2018 Revenues $ 108,770 $ 59,133 $ 279,569 $ 151,937 Net income $ 61,364 $ 30,933 $ 156,064 $ 69,039 At September 30, 2019 , technology, trade name and customer relationship intangibles, net of related amortization, totaled $9.2 million compared to $10.7 million as of December 31, 2018 . Amortization expense of $475,000 and $1.4 million, respectively, was included for the three and nine months ended September 30, 2019 compared to $693,000 and $2.1 million, respectively, for the same periods in the prior year. Accretion income of $630,000 and $2.0 million, respectively was included in the three and nine months ended September 30, 2019 compared to $719,000 and $2.2 million, respectively, for the same periods in the prior year. During the three and nine months ended September 30, 2019 , Pinnacle Financial and Pinnacle Bank received dividends from BHG of $9.0 million and $49.9 million, respectively, in the aggregate compared to $10.2 million and $33.7 million, respectively, for the same periods in the prior year. Earnings from BHG are included in Pinnacle Financial's consolidated tax return. Profits from intercompany transactions are eliminated. No loans were purchased from BHG by Pinnacle Bank for the three and nine month periods ended September 30, 2019 or 2018, respectively.

Securities

Securities	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Securities	Note 3. Securities The amortized cost and fair value of securities available-for-sale and held-to-maturity at September 30, 2019 and December 31, 2018 are summarized as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2019: Securities available-for-sale: U.S. Treasury securities $ 48,635 $ 31 $ 4 $ 48,662 U.S. government agency securities 92,668 412 834 92,246 Mortgage-backed securities 1,318,953 19,229 3,665 1,334,517 State and municipal securities 1,658,734 54,839 13,687 1,699,886 Asset-backed securities 163,334 601 1,202 162,733 Corporate notes and other 55,667 565 841 55,391 $ 3,337,991 $ 75,677 $ 20,233 $ 3,393,435 Securities held-to-maturity: State and municipal securities $ 189,684 $ 13,137 $ — $ 202,821 $ 189,684 $ 13,137 $ — $ 202,821 December 31, 2018: Securities available-for-sale: U.S. Treasury securities $ 30,325 $ — $ 25 $ 30,300 U.S. government agency securities 71,456 49 1,346 70,159 Mortgage-backed securities 1,336,469 3,110 28,634 1,310,945 State and municipal securities 1,259,267 1,126 30,739 1,229,654 Asset-backed securities 379,107 820 4,345 375,582 Corporate notes and other 69,399 170 2,523 67,046 $ 3,146,023 $ 5,275 67,612 $ 3,083,686 Securities held-to-maturity: State and municipal securities $ 194,282 $ 152 $ 1,303 $ 193,131 $ 194,282 $ 152 $ 1,303 $ 193,131 At September 30, 2019 , approximately $1.2 billion of securities within Pinnacle Financial's investment portfolio were pledged to secure either public funds and other deposits or securities sold under agreements to repurchase. At September 30, 2019 , repurchase agreements comprised of secured borrowings totaled $95.4 million and were secured by $95.4 million of pledged U.S. government agency securities, municipal securities, asset-backed securities, and corporate debentures. As the fair value of securities pledged to secure repurchase agreements may decline, Pinnacle Financial regularly evaluates its need to pledge additional securities to remain adequately secured. The amortized cost and fair value of debt securities as of September 30, 2019 by contractual maturity are shown below. Actual maturities may differ from contractual maturities of mortgage- and asset-backed securities since the mortgages and assets underlying the securities may be called or prepaid with or without penalty. Therefore, these securities are not included in the maturity categories in the following summary (in thousands): Available-for-sale Held-to-maturity September 30, 2019: Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 63,488 $ 63,507 $ 1,394 $ 1,394 Due in one year to five years 16,772 16,986 — — Due in five years to ten years 106,774 107,322 5,775 5,877 Due after ten years 1,668,670 1,708,370 182,515 195,550 Mortgage-backed securities 1,318,953 1,334,517 — — Asset-backed securities 163,334 162,733 — — $ 3,337,991 $ 3,393,435 $ 189,684 $ 202,821 At September 30, 2019 and December 31, 2018 , the following investments had unrealized losses. The table below classifies these investments according to the term of the unrealized losses of less than twelve months or twelve months or longer (in thousands): Investments with an Unrealized Loss of less than 12 months Investments with an Unrealized Loss of 12 months or longer Total Investments with an Unrealized Loss Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses At September 30, 2019 U.S. Treasury securities $ 9,622 $ 4 $ — $ — $ 9,622 $ 4 U.S. government agency securities 2,942 5 33,247 829 36,189 834 Mortgage-backed securities 116,784 515 210,395 3,150 327,179 3,665 State and municipal securities 214,033 1,874 383,023 11,813 597,056 13,687 Asset-backed securities 69,921 699 57,709 503 127,630 1,202 Corporate notes 14,959 120 12,053 721 27,012 841 Total temporarily-impaired securities $ 428,261 $ 3,217 $ 696,427 $ 17,016 $ 1,124,688 $ 20,233 At December 31, 2018 U.S. Treasury securities $ 30,054 $ 22 $ 246 $ 3 $ 30,300 $ 25 U.S. government agency securities 13,697 328 42,539 1,018 56,236 1,346 Mortgage-backed securities 203,299 2,134 882,231 26,500 1,085,530 28,634 Investments with an Unrealized Loss of less than 12 months Investments with an Unrealized Loss of 12 months or longer Total Investments with an Unrealized Loss Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses State and municipal securities 1,044,757 30,780 198,610 4,078 1,243,367 34,858 Asset-backed securities 268,677 4,118 11,828 227 280,505 4,345 Corporate notes 26,272 1,538 25,915 985 52,187 2,523 Total temporarily-impaired securities $ 1,586,756 $ 38,920 $ 1,161,369 $ 32,811 $ 2,748,125 $ 71,731 The applicable dates for determining when securities were in an unrealized loss position were September 30, 2019 and December 31, 2018 . As such, it is possible that a security had a market value less than its amortized cost on other days during the past twelve-month pe riods ended September 30, 2019 and December 31, 2018 , but is not in the "Investments with an Unrealized Loss of less t han 12 months" category above. As shown in the tables above, including both available-for-sale and held-to-maturity investment securities, at September 30, 2019 , Pinnacle Financial had approximately $20.2 million in unrealized losses on $1.1 billion of securities. The unrealized losses associated with $179.8 million of municipal securities transferred from the available-for-sale portfolio to the held-to-maturity portfolio in 2018 described below represent unrealized losses since the date of purchase, independent of the impact associated with changes in the cost basis upon transfer between portfolios. The unrealized losses associated with these investment securities are driven by changes in interest rates and are not due to the credit quality of the securities. These securities will continue to be monitored as a part of Pinnacle Financial's ongoing impairment analysis. Management evaluates the financial performance of the issuers on a quarterly basis to determine if it is probable that the issuers can make all contractual principal and interest payments. Because Pinnacle Financial currently does not intend to sell those securities that have an unrealized loss at September 30, 2019 , and it is not more-likely-than-not that Pinnacle Financial will be required to sell the securities before recovery of their amortized cost bases, which may be maturity, Pinnacle Financial does not consider these securities to be other-than-temporarily impaired at September 30, 2019 . In the third quarter of 2018, Pinnacle Financial transferred, at fair value, $179.8 million of municipal securities from the available-for-sale portfolio to the held-to-maturity portfolio. The related net unrealized after tax losses of $2.2 million remained in accumulated other comprehensive income (loss) and will be amortized over the remaining life of the securities, offsetting the related amortization of discount on the transferred securities. No gains or losses were recognized at the time of the transfer. Periodically, available-for-sale securities may be sold or the composition of the portfolio realigned to improve yields, quality or marketability, or to implement changes in investment or asset/liability strategy, including maintaining collateral requirements and raising funds for liquidity purposes or preparing for anticipated changes in market interest rates. Additionally, if an available-for-sale security loses its investment grade or tax-exempt status, the underlying credit support is terminated or collection otherwise becomes uncertain based on factors known to management, Pinnacle Financial will consider selling the security, but will review each security on a case-by-case basis as these factors become known. Consistent with the investment policy, during the three and nine months ended September 30, 2019 available-for-sale securities of approximately $149.4 million and $626.1 million, respectively, were sold and net unrealized gains, net of tax, of $308,000 and net unrealized losses, net of tax, of $4.4 million, respectively, were reclassified from accumulated other comprehensive income into net income. The carrying values of Pinnacle Financial's investment securities could decline in the future if the financial condition of issuers deteriorates and management determines it is probable that Pinnacle Financial will not recover the entire amortized cost bases of the securities. As a result, there is a risk that other-than-temporary impairment charges may occur in the future. Additionally, there is a risk that other-than-temporary impairment charges may occur in the future if management's intention to hold these securities to maturity and/or recovery changes. Pinnacle Financial has entered into various fair value hedging transactions to mitigate the impact of changing interest rates on the fair values of available for sale securities. See Note 8. Derivative Instruments for disclosure of the gains and losses recognized on derivative instruments and the cumulative fair value hedging adjustments to the carrying amount of the hedged securities.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Loans and Allowance for Loan Losses	Note 4. Loans and Allowance for Loan Losses For financial reporting purposes, Pinnacle Financial classifies its loan portfolio based on the underlying collateral utilized to secure each loan. This classification is consistent with those utilized in the Quarterly Report of Condition and Income filed by Pinnacle Bank with the Federal Deposit Insurance Corporation (FDIC). Pinnacle Financial uses five loan categories: commercial real estate mortgage, consumer real estate mortgage, construction and land development, commercial and industrial, and consumer and other. • Commercial real estate mortgage loans . Commercial real estate mortgage loans are categorized as such based on investor exposures where repayment is largely dependent upon the operation, refinance, or sale of the underlying real estate. Commercial real estate mortgage loans also includes owner-occupied commercial real estate which Pinnacle Financial believes shares a similar risk profile to Pinnacle Financial's commercial and industrial products. • Consumer real estate mortgage loans . Consumer real estate mortgage consists primarily of loans secured by 1-4 family residential properties, including home equity lines of credit. • Construction and land development loans . Construction and land development loans include loans where the repayment is dependent on the successful operation of the related real estate project. Construction and land development loans include 1-4 family construction projects and commercial construction endeavors such as warehouses, apartments, office and retail space and land acquisition and development. • Commercial and industrial loans . Commercial and industrial loans include loans to business enterprises issued for commercial, industrial and/or other professional purposes. • Consumer and other loans . Consumer and other loans include all loans issued to individuals not included in the consumer real estate mortgage classification. Examples of consumer and other loans are automobile loans, credit cards and loans to finance education, among others. Commercial loans receive risk ratings assigned by a financial advisor subject to validation by Pinnacle Financial's independent loan review department. Risk ratings are categorized as pass, special mention, substandard, substandard-nonaccrual or doubtful-nonaccrual. Pass rated loans include six distinct ratings categories for loans that represent specific attributes. Pinnacle Financial believes that its categories follow those used by Pinnacle Bank's primary regulators. At September 30, 2019 , approximately 79.5% of Pinnacle Financial's loan portfolio was analyzed as a commercial loan type with a specifically assigned risk rating. Consumer loans and small business loans are generally not assigned an individual risk rating but are evaluated as either accrual or nonaccrual based on the performance of the individual loans. However, certain consumer real estate-mortgage loans and certain consumer and other loans receive a specific risk rating due to the loan proceeds being used for commercial purposes even though the collateral may be of a consumer loan nature. Risk ratings are subject to continual review by a financial advisor and a senior credit officer. At least annually, Pinnacle Financial's credit procedures require that every risk rated loan of $1.0 million or more be subject to a formal credit risk review process. Each loan's risk rating is also subject to review by Pinnacle Financial's independent loan review department, which reviews a substantial portion of Pinnacle Financial's risk rated portfolio annually. Included in the coverage are independent loan reviews of loans in targeted higher-risk portfolio segments such as certain commercial and industrial loans, land loans and/or loan types in certain geographies. The following table presents Pinnacle Financial's loan balances by primary loan classification and the amount within each risk rating category. Pass rated loans include all credits other than those included in special mention, substandard, substandard-nonaccrual and doubtful-nonaccrual which are defined as follows: • Special mention loans have potential weaknesses that deserve management's close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in Pinnacle Financial's credit position at some future date. • Substandard loans are inadequately protected by the current net worth and financial capacity of the obligor or of the collateral pledged, if any. Assets so classified must have a well-defined weakness or weaknesses that jeopardize collection of the debt. Substandard loans are characterized by the distinct possibility that Pinnacle Financial could sustain some loss if the deficiencies are not corrected. • Substandard-nonaccrual loans are substandard loans that have been placed on nonaccrual status. • Doubtful-nonaccrual loans have all the characteristics of substandard-nonaccrual loans with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The following table outlines the amount of each loan classification categorized into each risk rating category as of September 30, 2019 and December 31, 2018 (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer Total September 30, 2019 Pass $ 7,478,442 $ 2,983,694 $ 2,244,217 $ 5,648,775 $ 465,607 $ 18,820,735 Special Mention 89,057 5,771 2,846 95,743 710 194,127 Substandard (1) 119,155 12,948 4,193 121,160 61 257,517 Substandard-nonaccrual 22,591 23,089 2,047 25,360 176 73,263 Doubtful-nonaccrual — — — — — — Total loans $ 7,709,245 $ 3,025,502 $ 2,253,303 $ 5,891,038 $ 466,554 $ 19,345,642 Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer Total December 31, 2018 Pass $ 6,998,485 $ 2,787,570 $ 2,059,376 $ 5,148,726 $ 352,516 $ 17,346,673 Special Mention 55,932 7,902 4,334 24,284 711 93,163 Substandard (1) 78,202 20,906 5,358 75,351 62 179,879 Substandard-nonaccrual 32,335 28,069 3,387 23,060 983 87,834 Doubtful-nonaccrual — — — — — — Total loans $ 7,164,954 $ 2,844,447 $ 2,072,455 $ 5,271,421 $ 354,272 $ 17,707,549 (1) Potential problem loans represent those loans with a well-defined weakness and where information about possible credit problems of borrowers has caused management to have doubts about the borrower's ability to comply with present repayment terms. This definition is believed to be substantially consistent with the standards established by Pinnacle Bank's primary regulators for loans classified as substandard, excluding troubled debt restructurings. Potential problem loans, which are not included in nonaccrual loans, amounted to approximately $254.0 million at September 30, 2019 , compared to $176.3 million at December 31, 2018 . Loans acquired with deteriorated credit quality are recorded pursuant to the provisions of ASC 310-30, and are referred to as purchased credit impaired loans. The following table provides a rollforward of purchased credit impaired loans from December 31, 2018 through September 30, 2019 (in thousands): Gross Carrying Value Accretable Yield Nonaccretable Yield Net Carrying Value December 31, 2018 $ 42,837 $ (114 ) $ (17,394 ) $ 25,329 Acquisition 1,883 — — 1,883 Reclassification of yield from nonaccretable to accretable — (7,505 ) 7,505 — Year-to-date settlements (12,020 ) 1,451 4,229 (6,340 ) September 30, 2019 $ 32,700 $ (6,168 ) $ (5,660 ) $ 20,872 Certain of these loans have been deemed to be collateral dependent and, as such, no accretable yield has been recorded for these loans. Amounts are reclassified between accretable and nonaccretable yield as cash flow analyses performed on the individual loans indicate an increase or decrease in the amount of cash flows expected to be collected. The carrying value is adjusted for additional draws, pursuant to contractual arrangements, offset by loan paydowns. Year-to-date settlements include both loans that were charged-off as well as loans that were paid off, typically as a result of refinancings at other institutions. Impaired loans include nonaccrual loans, troubled debt restructurings, and other loans deemed to be impaired but that continue to accrue interest. The following tables detail the recorded investment, unpaid principal balance and related allowance of Pinnacle Financial's impaired loans at September 30, 2019 and December 31, 2018 by loan classification (in thousands): At September 30, 2019 At December 31, 2018 Recorded investment Unpaid principal balances Related allowance Recorded investment Unpaid principal balances Related allowance Impaired loans with an allowance: Commercial real estate – mortgage $ 13,462 $ 13,472 $ 1,021 $ 14,114 $ 14,124 $ 724 Consumer real estate – mortgage 19,245 19,368 1,065 19,864 19,991 1,443 Construction and land development 275 271 15 581 579 28 Commercial and industrial 11,591 11,566 1,497 9,252 9,215 1,441 At September 30, 2019 At December 31, 2018 Recorded investment Unpaid principal balances Related allowance Recorded investment Unpaid principal balances Related allowance Consumer and other 176 174 10 983 1,005 328 Total $ 44,749 $ 44,851 $ 3,608 $ 44,794 $ 44,914 $ 3,964 Impaired loans without an allowance: Commercial real estate – mortgage $ 8,356 $ 8,366 $ — $ 14,724 $ 14,739 $ — Consumer real estate – mortgage 4,960 4,958 — 7,247 7,271 — Construction and land development 20 19 — 1,786 1,786 — Commercial and industrial 12,897 12,890 — 14,595 14,627 — Consumer and other — — — — — — Total $ 26,233 $ 26,233 $ — $ 38,352 $ 38,423 $ — Total impaired loans $ 70,982 $ 71,084 $ 3,608 $ 83,146 $ 83,337 $ 3,964 For the three and nine months ended September 30, 2019 , the average balance of impaired loans, was $73.6 million and $81.6 million, respectively, compared to $82.3 million and $73.3 million, respectively, for the same periods in 2018 . Pinnacle Financial's policy is that the accrual of interest income will be discontinued when (1) there is a significant deterioration in the financial condition of the borrower and full repayment of principal and interest is not expected or (2) the principal or interest is more than 90 days past due, unless the loan is both well secured and in the process of collection. As such, at the date loans are placed on nonaccrual status, Pinnacle Financial reverses all previously accrued interest income against current year earnings. Pinnacle Financial's policy is that once a loan is placed on nonaccrual status each subsequent payment is reviewed on a case-by-case basis to determine if the payment should be applied to interest or principal pursuant to regulatory guidelines. As detailed in the following table, Pinnacle Financial recognized no interest income from cash payments received on nonaccrual loans during the three months ended September 30, 2019 and $176,000 in interest income from cash payments received on nonaccrual loans during the nine months ended September 30, 2019 , compared to $84,000 and $337,000 , respectively, during the three and nine months ended September 30, 2018 . Had these nonaccruing loans been on accruing status, interest income would have been higher by $1.3 million and $3.5 million, respectively, for the three and nine months ended September 30, 2019 compared to $1.1 million and $2.8 million higher, respectively, for the three and nine months ended September 30, 2018 . The following table details the average recorded investment and the amount of interest income recognized on a cash basis for the three and nine months ended September 30, 2019 and 2018 , respectively, of impaired loans by loan classification (in thousands): For the three months ended For the nine months ended 2019 2018 2019 2018 Average recorded investment Interest income recognized Average recorded investment Interest income recognized Average recorded investment Interest income recognized Average recorded investment Interest income recognized Impaired loans with an allowance: Commercial real estate – mortgage $ 13,050 $ — $ 13,474 $ — $ 14,689 $ — $ 9,297 $ — Consumer real estate – mortgage 19,508 — 14,162 — 20,887 — 11,476 — Construction and land development 451 — 1,150 — 587 — 1,301 — Commercial and industrial 11,113 — 7,470 — 10,070 — 9,345 — Consumer and other 143 — 912 — 400 — 651 — Total $ 44,265 $ — $ 37,168 $ — $ 46,633 $ — $ 32,070 $ — Impaired loans without an allowance: Commercial real estate – mortgage $ 9,344 $ — $ 22,029 $ 84 $ 12,521 $ 176 $ 18,702 $ 337 Consumer real estate – mortgage 7,922 — 5,699 — 8,381 — 5,034 — Construction and land development 10 — 1,442 — 452 — 1,382 — Commercial and industrial 12,108 — 16,008 — 13,625 — 16,096 — Consumer and other — — — — — — — — Total $ 29,384 $ — $ 45,178 $ 84 $ 34,979 $ 176 $ 41,214 $ 337 Total impaired loans $ 73,649 $ — $ 82,346 $ 84 $ 81,612 $ 176 $ 73,284 $ 337 At September 30, 2019 and December 31, 2018 , there were $5.8 million and $5.9 million , respectively, of troubled debt restructurings that were performing as of their restructure date and which were accruing interest. Troubled commercial loans are restructured by specialists within Pinnacle Bank's Special Assets Group, and all restructurings are approved by committees and/or credit officers separate and apart from the normal loan approval process. These specialists are charged with reducing Pinnacle Financial's overall risk and exposure to loss in the event of a restructuring by obtaining some or all of the following: improved documentation, additional guaranties, increase in curtailments, reduction in collateral release terms, additional collateral or other similar strategies. The following table outlines the amount of each loan category where troubled debt restructurings were made during the three and nine months ended September 30, 2019 and 2018 (dollars in thousands): Three Months Ended Nine Months Ended 2019 Number Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, net of related allowance Number Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, net of related allowance Commercial real estate – mortgage 1 $ 314 $ 297 1 $ 314 $ 297 Consumer real estate – mortgage — — — 1 712 626 Construction and land development — — — 1 21 19 Commercial and industrial — — — 1 1,397 796 Consumer and other — — — — — — 1 $ 314 $ 297 4 $ 2,444 $ 1,738 2018 Commercial real estate – mortgage — $ — $ — — $ — $ — Consumer real estate – mortgage 1 169 169 2 206 206 Construction and land development 1 348 348 1 348 348 Commercial and industrial — — — — — — Consumer and other — — — — — — 2 $ 517 $ 517 3 $ 554 $ 554 During the nine months ended September 30, 2019 and 2018 , there were no troubled debt restructurings that subsequently defaulted within twelve months of the restructuring. At September 30, 2019 and December 31, 2018, the allowance for loan losses included no allowance specifically related to accruing troubled debt restructurings, which are classified as impaired loans pursuant to U.S. GAAP, but which continued to accrue interest at contractual rates at that date. In addition to the loan metrics above, Pinnacle Financial analyzes its commercial loan portfolio to determine if a concentration of credit risk exists to any industries. Pinnacle Financial utilizes broadly accepted industry classification systems in order to classify borrowers into various industry classifications. Pinnacle Financial has a credit exposure (loans outstanding plus unfunded lines of credit) exceeding 25% of Pinnacle Bank's total risk-based capital to borrowers in the following industries at September 30, 2019 with the comparative exposures for December 31, 2018 (in thousands): September 30, 2019 Outstanding Principal Balances Unfunded Commitments Total exposure Total Exposure at December 31, 2018 Lessors of nonresidential buildings $ 3,502,181 $ 826,157 $ 4,328,338 $ 3,932,059 Lessors of residential buildings 1,003,401 549,949 1,553,350 1,484,697 New Housing For-Sale Builders 516,646 580,917 1,097,563 1,100,989 Hotels (except Casino Hotels) and Motels 806,089 167,696 973,785 920,001 Additionally, Pinnacle Financial monitors two ratios regarding construction and commercial real estate lending as part of its concentration management processes. Both ratios are calculated by dividing certain types of loan balances for each of the two categories by Pinnacle Bank’s total risk-based capital. At September 30, 2019 and December 31, 2018 , Pinnacle Bank’s construction and land development loans as a percentage of total risk-based capital were 79.9% and 85.2% , respectively. Non-owner occupied commercial real estate and multifamily loans (including construction and land development loans) as a percentage of total risk-based capital were 272.8% and 277.7% as of September 30, 2019 and December 31, 2018 , respectively. Banking regulations have established guidelines for the construction ratio of less than 100% of total risk-based capital and for the non-owner occupied ratio of less than 300% of total risk-based capital. When a bank’s ratios are in excess of one or both of these guidelines, banking regulations generally require an increased level of monitoring in these lending areas by bank management. At September 30, 2019 , Pinnacle Bank was within the 100% and 300% guidelines and has established what it believes to be appropriate controls to monitor its lending in these areas as it aims to keep the level of these loans below the 100% and 300% thresholds. The table below presents past due balances by loan classification and segment at September 30, 2019 and December 31, 2018 , allocated between accruing and nonaccrual status (in thousands): Accruing Nonaccruing September 30, 2019 30-89 days past due and accruing 90 days or more past due and accruing Total past due and accruing Current and accruing Purchased credit impaired Nonaccrual (1) Nonaccruing purchased credit impaired (1) Total loans Commercial real estate: Owner-occupied $ 6,398 $ — $ 6,398 $ 2,574,628 $ 2,903 $ 11,011 $ 897 $ 2,595,837 All other 5,896 — 5,896 5,091,660 5,169 10,640 43 5,113,408 Consumer real estate – mortgage 9,051 773 9,824 2,989,373 3,216 19,245 3,844 3,025,502 Construction and land development 2,005 — 2,005 2,247,977 1,274 275 1,772 2,253,303 Commercial and industrial 16,524 1,077 17,601 5,847,752 325 23,931 1,429 5,891,038 Consumer and other 3,266 600 3,866 462,512 — 176 — 466,554 Total $ 43,140 $ 2,450 $ 45,590 $ 19,213,902 $ 12,887 $ 65,278 $ 7,985 $ 19,345,642 Accruing Nonaccruing December 31, 2018 30-89 days past due and accruing 90 days or more past due and accruing Total past due and accruing Current and accruing Purchased credit impaired Nonaccrual (1) Nonaccruing purchased credit impaired (1) Total loans Commercial real estate: Owner-occupied $ 10,170 $ — $ 10,170 $ 2,623,700 $ 2,664 $ 16,025 $ 874 $ 2,653,433 All other 1,586 — 1,586 4,488,840 5,659 12,634 2,802 4,511,521 Consumer real estate – mortgage 18,059 — 18,059 2,794,630 3,689 22,564 5,505 2,844,447 Construction and land development 3,759 — 3,759 2,063,201 2,108 2,020 1,367 2,072,455 Commercial and industrial 21,451 1,082 22,533 5,225,205 623 23,022 38 5,271,421 Consumer and other 3,276 476 3,752 349,537 — 983 — 354,272 Total $ 58,301 $ 1,558 $ 59,859 $ 17,545,113 $ 14,743 $ 77,248 $ 10,586 $ 17,707,549 (1) Approximately $33.5 million and $52.5 million of nonaccrual loans as of September 30, 2019 and December 31, 2018 , respectively, were performing pursuant to their contractual terms at those dates . The following table details the changes in the allowance for loan losses for the three and nine months ended September 30, 2019 and 2018 , respectively, by loan classification (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total Three months ended September 30, 2019: Balance at June 30, 2019 $ 30,826 $ 8,489 $ 11,206 $ 37,436 $ 2,114 $ 182 $ 90,253 Charged-off loans (102 ) (194 ) (14 ) (5,082 ) (1,388 ) — (6,780 ) Recovery of previously charged-off loans 209 901 97 407 300 — 1,914 Provision for loan losses 1,684 (1,426 ) 585 1,814 3,278 2,325 8,260 Balance at September 30, 2019 $ 32,617 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 Three months ended September 30, 2018: Balance at June 30, 2018 $ 24,848 $ 5,853 $ 10,984 $ 28,338 $ 5,172 $ 475 $ 75,670 Charged-off loans (1,968 ) (262 ) (24 ) (3,336 ) (1,359 ) — (6,949 ) Recovery of previously charged-off loans 63 987 70 1,037 382 — 2,539 Provision for loan losses 3,574 149 (48 ) 4,085 618 347 8,725 Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total Balance at September 30, 2018 $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 Nine months ended September 30, 2019: Balance at December 31, 2018 $ 26,946 $ 7,670 $ 11,128 $ 31,731 $ 5,423 $ 677 $ 83,575 Charged-off loans (1,701 ) (1,124 ) (18 ) (13,842 ) (4,643 ) — (21,328 ) Recovery of previously charged-off loans 1,173 1,642 238 4,749 959 — 8,761 Provision for loan losses 6,199 (418 ) 526 11,937 2,565 1,830 22,639 Balance at September 30, 2019 $ 32,617 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 Nine months ended September 30, 2018: Balance at December 31, 2017 $ 21,188 $ 5,031 $ 8,962 $ 24,863 $ 5,874 $ 1,322 $ 67,240 Charged-off loans (2,930 ) (1,533 ) (36 ) (7,600 ) (10,217 ) — (22,316 ) Recovery of previously charged-off loans 1,517 2,190 1,645 2,492 2,159 — 10,003 Provision for loan losses 6,742 1,039 411 10,369 6,997 (500 ) 25,058 Balance at September 30, 2018 $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 The following table details the allowance for loan losses and recorded investment in loans by loan classification and by impairment evaluation method as of September 30, 2019 and December 31, 2018 , respectively (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total September 30, 2019 Allowance for Loan Losses: Collectively evaluated for impairment $ 31,596 $ 6,705 $ 11,859 $ 33,078 $ 4,294 $ 87,532 Individually evaluated for impairment 1,021 1,065 15 1,497 10 3,608 Loans acquired with deteriorated credit quality (1) — — — — — — Total allowance for loan losses $ 32,617 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 Loans: Collectively evaluated for impairment $ 7,678,415 $ 2,994,237 $ 2,249,962 $ 5,864,796 $ 466,378 $ 19,253,788 Individually evaluated for impairment 21,818 24,205 295 24,488 176 70,982 Loans acquired with deteriorated credit quality 9,012 7,060 3,046 1,754 — 20,872 Total loans $ 7,709,245 $ 3,025,502 $ 2,253,303 $ 5,891,038 $ 466,554 $ 19,345,642 December 31, 2018 Allowance for Loan Losses: Collectively evaluated for impairment $ 26,222 $ 6,227 $ 11,100 $ 30,290 $ 5,095 $ 78,934 Individually evaluated for impairment 724 1,443 28 1,441 328 3,964 Loans acquired with deteriorated credit quality (1) — — — — — — Total allowance for loan losses $ 26,946 $ 7,670 $ 11,128 $ 31,731 $ 5,423 $ 677 $ 83,575 Loans: Collectively evaluated for impairment $ 7,124,117 $ 2,808,142 $ 2,066,613 $ 5,246,913 $ 353,289 $ 17,599,074 Individually evaluated for impairment 28,838 27,111 2,367 23,847 983 83,146 Loans acquired with deteriorated credit quality 11,999 9,194 3,475 661 — 25,329 Total loans $ 7,164,954 $ 2,844,447 $ 2,072,455 $ 5,271,421 $ 354,272 $ 17,707,549 (1) Loans acquired with deteriorated credit quality are recorded at fair value at the time of acquisition. An allowance for loan losses is recorded only in the event of subsequent credit deterioration. The adequacy of the allowance for loan losses is assessed at the end of each calendar quarter. The level of the allowance is based upon evaluation of the loan portfolio, current asset quality trends, known and inherent risks in the portfolio, adverse situations that may affect the borrowers' ability to repay (including the timing of future payment), the estimated value of any underlying collateral, composition of the loan portfolio, economic conditions, historical loss experience, industry and peer bank loan quality indications and other pertinent factors, including regulatory recommendations. The allowance for loan losses for purchased loans is calculated similarly to the method utilized for legacy Pinnacle Bank loans. Pinnacle Financial's accounting policy is to compare the computed allowance for loan losses for purchased loans on a loan-by-loan basis to any remaining fair value adjustment. If the computed allowance is greater than the remaining fair value adjustment, the excess is added to the allowance for loan losses by a charge to the provision for loan losses. At September 30, 2019 , Pinnacle Bank had granted loans and other extensions of credit amounting to approximately $10.7 million to current directors, executive officers, and their related entities, of which $6.6 million had been drawn upon. At December 31, 2018 , Pinnacle Bank had granted loans and other extensions of credit amounting to approximately $37.9 million to directors, executive officers, and their related entities, of which approximately $18.3 million had been drawn upon. None of these loans to directors, executive officers, and their related entities were impaired at September 30, 2019 or December 31, 2018 . At September 30, 2019 , Pinnacle Financial had approximately $21.3 million in commercial loans held for sale compared to $16.0 million at December 31, 2018, which primarily included commercial real estate and apartment loans originated for sale to a third-party as part of a multi-family loan program. Such loans are closed under a pass-through commitment structure wherein Pinnacle Bank's loan commitment to the borrower is the same as the third party's take-out commitment to Pinnacle Bank and the third party purchase typically occurs within thirty days of Pinnacle Bank closing with the borrowers. Residential Lending At September 30, 2019 , Pinnacle Financial had approximately $54.3 million of mortgage loans held-for-sale compared to approximately $31.8 million at December 31, 2018 . Total loan volumes sold during the nine months ended September 30, 2019 were approximately $788.1 million compared to approximately $917.9 million for the nine months ended September 30, 2018 . During the three and nine months ended September 30, 2019 , Pinnacle Financial recognized $7.4 million and $18.3 million, respectively, in gains on the sale of these loans, net of commissions paid, compared to $3.9 million and $11.4 million, respectively, net of commissions paid, during the three and nine months ended September 30, 2018 . These mortgage loans held-for-sale are originated internally and are primarily to borrowers in Pinnacle Bank's geographic markets. These sales are typically on a mandatory basis to investors that follow conventional government sponsored entities (GSE) and the Department of Housing and Urban Development/U.S. Department of Veterans Affairs (HUD/VA) guidelines. Each purchaser of a mortgage loan held-for-sale has specific guidelines and criteria for sellers of loans and the risk of credit loss with regard to the principal amount of the loans sold is generally transferred to the purchasers upon sale. While the loans are sold without recourse, the purchase agreements require Pinnacle Bank to make certain representations and warranties regarding the existence and sufficiency of file documentation and the absence of fraud by borrowers or other third parties such as appraisers in connection with obtaining the loan. If it is determined that the loans sold were in breach of these representations or warranties, Pinnacle Bank has obligations to either repurchase the loan for the unpaid principal balance and related investor fees or make the purchaser whole for the economic benefits of the loan. To date, Pinnacle Bank's liability pursuant to the terms of these representations and warranties has been insignificant to Pinnacle Bank.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Note 5. Income Taxes ASC 740, Income Taxes , defines the threshold for recognizing the benefits of tax return positions in the financial statements as "more-likely-than-not" to be sustained by the taxing authority. This section also provides guidance on the derecognition, measurement and classification of income tax uncertainties, along with any related interest and penalties, and includes guidance concerning accounting for income tax uncertainties in interim periods. The unrecognized tax benefit related to uncertain tax positions related to state income tax filings was $5.1 million at September 30, 2019 and December 31, 2018 , respectively. No change was recorded to the unrecognized tax benefit related to uncertain tax positions in each of the three and nine month periods ended September 30, 2019 and 2018 . Pinnacle Financial's policy is to recognize interest and/or penalties related to income tax matters in income tax expense. For both the three and nine months ended September 30, 2019 and 2018 , respectively, there were no interest and penalties recorded in the income statement. Pinnacle Financial's effective tax rate for the three and nine months ended September 30, 2019 was 19.5% and 19.6% compared to 20.7% and 20.3% for the three and nine months ended September 30, 2018 , respectively. The difference between the effective tax rate and the federal and state income tax statutory rate of 26.14% at September 30, 2019 and 2018 is primarily due to investments in bank qualified municipal securities, tax benefits of Pinnacle Bank's real estate investment trust subsidiary, participation in the Tennessee Community Investment Tax Credit (CITC) program, and tax benefits associated with share-based compensation, bank-owned life insurance and our captive insurance subsidiary, offset in part by the limitation on deductibility of meals and entertainment expense, non-deductible executive compensation and non-deductible FDIC premiums. Income tax expense is also impacted by the vesting of restricted share awards and the exercise of employee stock options, which expense or benefit is recorded as a discrete item as a component of total income tax, the amount of which is dependent upon the change in the grant date fair value and the vest date fair value of the underlying award. Accordingly, for the three and nine months ended September 30, 2019 we recognized tax benefits of $131,000 and $832,000 , respectively, compared to tax benefits of $199,000 and $3.0 million, respectively, for the three and nine months ended September 30, 2018 .

Commitments and Contingent Liab

Commitments and Contingent Liabilities	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Note 6. Commitments and Contingent Liabilities In the normal course of business, Pinnacle Bank has entered into off-balance sheet financial instruments which include commitments to extend credit (i.e., including unfunded lines of credit) and standby letters of credit. Commitments to extend credit are usually the result of lines of credit granted to existing borrowers under agreements that the total outstanding indebtedness will not exceed a specific amount during the term of the indebtedness. Typical borrowers are commercial concerns that use lines of credit to supplement their treasury management functions, and thus their total outstanding indebtedness may fluctuate during any time period based on the seasonality of their business and the resultant timing of their cash flows. Other typical lines of credit are related to home equity loans granted to consumers. Commitments to extend credit generally have fixed expiration dates or other termination clauses and may require payment of a fee. At September 30, 2019 , these commitments amounted to $7.8 billion , of which approximately $1.0 billion related to home equity lines of credit. Standby letters of credit are generally issued on behalf of an applicant (Pinnacle Bank's customer) to a specifically named beneficiary and are the result of a particular business arrangement that exists between the applicant and the beneficiary. Standby letters of credit have fixed expiration dates and are usually for terms of two years or less unless terminated beforehand due to criteria specified in the standby letter of credit. A typical arrangement involves the applicant routinely being indebted to the beneficiary for such items as inventory purchases, insurance, utilities, lease guarantees or other third party commercial transactions. The standby letter of credit would permit the beneficiary to obtain payment from Pinnacle Bank under certain prescribed circumstances. Subsequently, Pinnacle Bank would then seek reimbursement from the applicant pursuant to the terms of the standby letter of credit. At September 30, 2019 , these commitments amounted to $198.4 million . Pinnacle Bank typically follows the same credit policies and underwriting practices when making these commitments as it does for on-balance sheet instruments. Each customer's creditworthiness is typically evaluated on a case-by-case basis, and the amount of collateral obtained, if any, is based on management's credit evaluation of the customer. Collateral held varies but may include cash, real estate and improvements, marketable securities, accounts receivable, inventory, equipment and personal property. The contractual amounts of these commitments are not reflected in the consolidated financial statements and only amounts drawn upon would be reflected in the future. Since many of the commitments are expected to expire without being drawn upon, the contractual amounts do not necessarily represent future cash requirements. However, should the commitments be drawn upon and should Pinnacle Bank's customers default on their resulting obligation to Pinnacle Bank, the maximum exposure to credit loss, without consideration of collateral, is represented by the contractual amount of those commitments. At September 30, 2019 and December 31, 2018 , Pinnacle Financial had accrued $2.4 million and $2.9 million, respectively, for the inherent risks associated with these off-balance sheet commitments. Various legal claims also arise from time to time in the normal course of business. In the opinion of management, the resolution of these claims outstanding at September 30, 2019 are not expected to have a material adverse impact on Pinnacle Financial's consolidated financial condition, operating results or cash flows.

Stock Options and Restricted Sh

Stock Options and Restricted Shares	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock Options and Restricted Shares	Note 7. Stock Options and Restricted Shares The 2018 Omnibus Equity Incentive Plan (the "2018 Plan") permits Pinnacle Financial to reissue outstanding awards that are subsequently forfeited, settled in cash, withheld by Pinnacle Financial to cover withholding taxes or expire unexercised and returned to the 2018 Plan. At September 30, 2019 , there were approximately 1.2 million shares available for issuance under the 2018 Plan. The BNC Bancorp 2013 Amended and Restated Omnibus Stock Incentive Plan (the "BNC Plan") was assumed by Pinnacle Financial in connection with its merger with BNC. As of September 30, 2019 , the BNC Plan had approximately 8,000 shares remaining available for issuance to existing associates that were previously BNC associates. No new awards may be granted under equity incentive plans of Pinnacle Financial other than the 2018 Plan except for shares remaining available for issuance to the former BNC associates pursuant to the BNC Plan. Upon the acquisition of CapitalMark, Pinnacle Financial assumed approximately 858,000 stock options under the CapitalMark Option Plan. No further shares remain available for issuance under the CapitalMark Option Plan. At September 30, 2019 , all of the remaining options outstanding were granted under the CapitalMark Option Plan. Common Stock Options A summary of the stock option activity within the equity incentive plans during the nine months ended September 30, 2019 and information regarding expected vesting, contractual terms remaining, intrinsic values and other matters is as follows: Number Weighted-Average Exercise Price Weighted-Average Contractual Remaining Term (in years) Aggregate Intrinsic Value (000's) Outstanding at December 31, 2018 176,709 $ 22.77 2.23 $ 4,123 (1) Granted — Exercised (10,285 ) Forfeited — Outstanding at September 30, 2019 166,424 $ 22.69 2.54 $ 5,732 (2) Options exercisable at September 30, 2019 166,424 $ 22.69 2.54 $ 5,732 (2) (1) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of Pinnacle Financial common stock of $46.10 per common share at December 31, 2018 for the 176,709 options that were in-the-money at December 31, 2018 . (2) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of Pinnacle Financial common stock of $56.75 per common share at September 30, 2019 for the 166,424 options that were in-the-money at September 30, 2019 . Compensation costs related to stock options granted under Pinnacle Financial's equity incentive plans have been fully recognized and all outstanding option awards are fully vested. Restricted Share Awards A summary of activity for unvested restricted share awards for the nine months ended September 30, 2019 is as follows: Number Grant Date Weighted-Average Cost Unvested at December 31, 2018 692,806 $ 55.19 Shares awarded 228,760 Restrictions lapsed and shares released to associates/directors (296,878 ) Shares forfeited (1) (28,875 ) Unvested at September 30, 2019 595,813 $ 53.21 (1) Represents shares forfeited due to employee termination and/or retirement. No shares were forfeited due to failure to meet performance targets. Pinnacle Financial has granted restricted share awards to associates and outside directors with a time-based vesting criteria. Compensation expense associated with time-based vesting restricted share awards is recognized over the time period that the restrictions associated with the awards lapse on a straight-line basis based on the total cost of the award. The following table outlines restricted stock grants that were made, grouped by similar vesting criteria, during the nine months ended September 30, 2019 . The table reflects the life-to-date activity for these awards: Grant Year Group (1) Vesting Period in years Shares awarded Restrictions Lapsed and shares released to participants Shares Forfeited by participants (4) Shares Unvested Time Based Awards 2019 Associates (2) 3 - 5 212,211 276 9,815 202,120 Outside Director Awards (3) 2019 Outside directors 1 16,549 — — 16,549 (1) Groups include employees (referred to as associates above) and outside directors. When the restricted shares are awarded, a participant receives voting rights and forfeitable dividend rights with respect to the shares, but is not able to transfer the shares until the restrictions have lapsed. Once the restrictions lapse, the participant is taxed on the value of the award and may elect to sell some shares (or have Pinnacle Financial withhold some shares) to pay the applicable income taxes associated with the award. Alternatively, the recipient can pay the withholding taxes in cash. For time-based vesting restricted share awards, dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination. For performance-based vesting awards to Pinnacle Financial's directors, dividends are placed into escrow until the forfeiture restrictions on such shares lapse. (2) The forfeiture restrictions on these restricted share awards lapse in equal annual installments on the anniversary date of the grant. (3) Restricted share awards are issued to the outside members of the board of directors in accordance with their board compensation plan. Restrictions lapse on February 29, 2020 based on each individual board member meeting their attendance goals for the various board and board committee meetings to which each member was scheduled to attend. (4) These shares represent forfeitures resulting from recipients whose employment or board membership was terminated during the year-to-date period ended September 30, 2019 . Any dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination or will not be distributed from escrow, as applicable. Restricted Share Units The following table details the restricted share unit awards (all of which are performance units) outstanding at September 30, 2019 : Units Awarded Grant year Named Executive Officers (NEOs) (1) Leadership Team other than NEOs Applicable Performance Periods associated with each tranche (fiscal year) Service period per tranche (in years) Subsequent holding period per tranche (in years) Period in which units to be settled into shares of common stock (2) 2019 166,211 - 249,343 52,244 2019 2 3 2024 2020 2 2 2024 2021 2 1 2024 2018 96,878 - 145,339 25,990 2018 2 3 2023 2019 2 2 2023 2020 2 1 2023 2017 72,537 - 109,339 24,916 2017 2 3 2022 2018 2 2 2022 2019 2 1 2022 2016 73,474 - 110,223 26,683 2016 2 3 2021 2017 2 2 2021 2018 2 1 2021 2015 58,200 - 101,850 28,378 2015 2 3 2020 2016 2 2 2020 2017 2 1 2020 (1) The named executive officers are awarded a range of awards that may be earned based on attainment of goals between a target level of performance and a maximum level of performance. (2) Restricted share unit awards granted in 2019, 2018, 2017, 2016 and 2015, if earned, will be settled in shares of Pinnacle Financial Common Stock in the periods noted in the table, if Pinnacle Bank's ratio of non-performing assets to its loans plus ORE is less than amounts established in the applicable award agreement. Stock compensation expense related to both restricted share awards and restricted share units for the three and nine months ended September 30, 2019 was $5.0 million and $15.1 million, respectively, compared to $4.5 million and $13.3 million, respectively, for the three and nine months ended September 30, 2018 . As of the September 30, 2019 , the total compensation cost related to unvested restricted share awards and restricted share units not yet recognized was $ 40.4 million. This expense is expected to be recognized over a weighted-average period of 1.69 years.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Note 8. Derivative Instruments Financial derivatives are reported at fair value in other assets or other liabilities. The accounting for changes in the fair value of a derivative depends on whether it has been designated and qualifies as part of a hedging relationship. Non-hedge derivatives For derivatives not designated as hedges, the gain or loss is recognized in current period earnings. Pinnacle Financial enters into interest rate swaps (swaps) to facilitate customer transactions and meet their financing needs. Upon entering into these instruments to meet customer needs, Pinnacle Financial enters into offsetting positions in order to minimize the risk to Pinnacle Financial. These swaps qualify as derivatives, but are not designated as hedging instruments. The income statement impact of the offsetting positions is limited to changes in the reserve for counterparty credit risk. A summary of Pinnacle Financial's interest rate swaps to facilitate customers' transactions as of September 30, 2019 and December 31, 2018 is included in the following table (in thousands): September 30, 2019 December 31, 2018 Balance Sheet Location Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Interest rate swap agreements: Assets Other assets $ 1,269,880 $ 56,846 $ 1,059,724 $ 22,273 Liabilities Other liabilities 1,269,880 (57,120 ) 1,059,724 (22,401 ) Total $ 2,539,760 $ (274 ) $ 2,119,448 $ (128 ) The effects of Pinnacle Financial's interest rate swaps to facilitate customers' transactions on the income statement during the three and nine months ended September 30, 2019 and 2018 were as follows (in thousands): Amount of Loss Recognized in Income Location of Loss Recognized in Income Three Months Ended September 30, Nine Months Ended 2019 2018 2019 2018 Interest rate swap agreements Other noninterest income $ (44 ) $ (8 ) $ (146 ) $ (42 ) Derivatives designated as cash flow hedges For derivative instruments that are designated and qualify as a cash flow hedge, the aggregate fair value of the derivative instrument is recorded in other assets or other liabilities with any gain or loss related to changes in fair value recorded in accumulated other comprehensive income, net of tax. The gain or loss is reclassified into earnings in the same period during which the hedged asset or liability affects earnings and is presented in the same income statement line item as the earnings effect of the hedged asset or liability. Pinnacle Financial uses forward cash flow hedges in an effort to manage future interest rate exposure on borrowings. The hedging strategy converts the LIBOR-based variable interest rate on forecasted borrowings to a fixed interest rate and is used in an effort to protect Pinnacle Financial from floating interest rate variability. During the second quarter of 2019, Pinnacle Financial purchased an interest rate floor to mitigate the impact of declining interest rates on LIBOR-based variable rate loans. A summary of Pinnacle Financial's cash flow hedge relationships as of September 30, 2019 and December 31, 2018 are as follows (in thousands): September 30, 2019 December 31, 2018 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Asset derivatives Interest rate floor Other assets 2.09 —% 2.75% minus 1 month LIBOR $ 1,300,000 $ 35,681 $ — $ — Liability derivatives Interest rate swaps Other liabilities 2.60 3.09% 3 month LIBOR $ 99,000 $ (3,886 ) $ 99,000 $ (1,757 ) The effects of Pinnacle Financial's cash flow hedge relationships on the statement of comprehensive income (loss) during the three and nine months ended September 30, 2019 and 2018 were as follows, net of tax (in thousands): Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss) Three Months Ended September 30, Nine Months Ended September 30, Asset derivatives 2019 2018 2019 2018 Interest rate floor - loans $ 1,951 $ — $ 9,875 $ — Liability derivatives Interest rate swaps - borrowings $ (69 ) $ 783 $ (1,572 ) $ 3,453 $ 1,882 $ 783 $ 8,303 $ 3,453 The cash flow hedges were determined to be highly effective during the periods presented and as a result qualify for hedge accounting treatment. The hedge would no longer be considered effective if a portion of the hedge becomes ineffective, the item hedged is no longer in existence or Pinnacle Financial discontinues hedge accounting. Pinnacle Financial expects the hedges to continue to be highly effective and qualify for hedge accounting during the remaining terms of the swaps. Losses totaling $1.1 million and $946,000 net of tax, respectively, were reclassified from accumulated other comprehensive income (loss) into net income during the three and nine months ended September 30, 2019 compared to gains of $145,000 and $429,000 net of tax, respectively, for the three and nine months ended September 30, 2018 . Approximately $908,000 in unrealized gains, net of tax, are expected to be reclassified from accumulated other comprehensive income (loss) into net income over the next twelve months related to previously terminated cash flow hedges. Derivatives designated as fair value hedges For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged asset or liability attributable to the hedged risk are recognized in current earnings. The gain or loss on the derivative instrument is presented on the same income statement line item as the earnings effect of the hedged item. Pinnacle Financial utilizes interest rate swaps designated as fair value hedges to mitigate the effect of changing interest rates on the fair values of fixed rate callable securities available-for-sale and fixed rate prepayable loans. The hedging strategy on securities converts the fixed interest rates to LIBOR-based variable interest rates. These derivatives are designated as partial term hedges of selected cash flows covering specified periods of time prior to the call dates of the hedged securities. A summary of Pinnacle Financial's fair value hedge relationships as of September 30, 2019 and December 31, 2018 are as follows (in thousands): September 30, 2019 December 31, 2018 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Liability derivatives Interest rate swap agreements - securities Other liabilities 7.29 3.08% 3 month LIBOR $ 477,905 $ (51,927 ) $ 477,905 $ (14,796 ) Interest rate swap agreements - loans Other liabilities — — — — — 900,000 (7,037 ) 7.29 3.08% $ 477,905 $ (51,927 ) $ 1,377,905 $ (21,833 ) The effects of Pinnacle Financial's fair value hedge relationships on the income statement during the three and nine months ended September 30, 2019 and 2018 were as follows (in thousands): Location of Gain (Loss) on Derivative Amount of Gain (Loss) Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Liability derivatives 2019 2018 2019 2018 Interest rate swaps - securities Interest income on securities $ (10,888 ) $ 1,755 $ (37,131 ) $ 1,991 Interest rate swaps - loans Interest income on loans $ — $ 2,236 $ (6,915 ) $ 3,358 Location of Gain (Loss) on Hedged Item Three Months Ended September 30, Nine Months Ended September 30, Liability derivatives - hedged items 2019 2018 2019 2018 Interest rate swaps - securities Interest income on securities $ 10,888 $ (1,755 ) $ 37,131 $ (1,991 ) Interest rate swaps - loans Interest income on loans $ — $ (2,236 ) $ 6,915 $ (3,358 ) The following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges at September 30, 2019 and December 31, 2018 (in thousands): Carrying Amount of the Hedged Assets Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets September 30, 2019 December 31, 2018 September 30, 2019 December 31, 2018 Line item on the balance sheet Securities available-for-sale $ 512,035 $ 515,063 $ 51,927 $ 14,796 Loans (1) $ — $ 907,037 $ — $ 7,037 (1) The carrying amount as shown represents the designated last-of-layer. At December 31, 2018, the total amortized cost basis of the closed portfolio of loans designated in these hedging relationships was $ 2.7 billion. During the second quarter of 2019, a fair value hedging relationship on loans was unwound resulting in a swap termination payment to the counterparty of approximately $14 .0 million. The corresponding loan fair value hedging adjustment of $14 .0 million as of the date of termination is being amortized over the remaining lives of the designated loans. During the three and nine months ended September 30, 2019 , amortization expense totaling $931,000 and $1.4 million, respectively, was recognized as a reduction to interest income on loans.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 9. Fair Value of Financial Instruments FASB ASC 820, Fair Value Measurements and Disclosures , defines fair value, establishes a framework for measuring fair value in U.S. GAAP and expands disclosures about fair value measurements. The definition of fair value focuses on the exit price, i.e., the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date, not the entry price, i.e., the price that would be paid to acquire the asset or received to assume the liability at the measurement date. The statement emphasizes that fair value is a market-based measurement; not an entity-specific measurement. Therefore, the fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. Valuation Hierarchy FASB ASC 820 establishes a three-level valuation hierarchy for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows: • Level 1 – inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2 – inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. • Level 3 – inputs to the valuation methodology are unobservable and significant to the fair value measurement. A financial instrument's categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The following is a description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy. Assets Securities available-for-sale – Where quoted prices are available for identical securities in an active market, securities are classified within Level 1 of the valuation hierarchy. Level 1 securities include highly liquid government securities and certain other financial products. If quoted market prices are not available, then fair values are estimated by using pricing models that use observable inputs or quoted prices of securities with similar characteristics and are classified within Level 2 of the valuation hierarchy. In certain cases where there is limited activity or less transparency around inputs to the valuation and more complex pricing models or discounted cash flows are used, securities are classified within Level 3 of the valuation hierarchy. Other investments – Included in other investments are investments recorded at fair value primarily in certain nonpublic investments and funds. The valuation of these nonpublic investments requires management judgment due to the absence of observable quoted market prices, inherent lack of liquidity and the long-term nature of such assets. These investments are valued initially based upon transaction price. The carrying values of other investments are adjusted either upwards or downwards from the transaction price to reflect expected exit values as evidenced by financing and sale transactions with third parties, or when determination of a valuation adjustment is confirmed through ongoing reviews by senior investment managers. A variety of factors are reviewed and monitored to assess positive and negative changes in valuation including, but not limited to, current operating performance and future expectations of the particular investment, industry valuations of comparable public companies and changes in market outlook and the third-party financing environment over time. In determining valuation adjustments resulting from the investment review process, emphasis is placed on current company performance and market conditions. These investments are included in Level 3 of the valuation hierarchy if the entities and funds are not widely traded and the underlying investments are in privately-held and/or start-up companies for which market values are not readily available. Certain investments in funds for which the underlying assets of the fund represent publicly traded investments are included in Level 2 of the valuation hierarchy. Other assets – Included in other assets are certain assets carried at fair value, including interest rate swap agreements to facilitate customer transactions, interest rate floors designated as cash flow hedges, and interest rate locks associated with the mortgage loan pipeline. The carrying amount of interest rate swap agreements is based on Pinnacle Financial's pricing models that utilize observable market inputs. The fair value of the cash flow hedge agreements is determined by calculating the difference between the discounted fixed rate cash flows and the discounted variable rate cash flows. The fair value of the mortgage loan pipeline is based upon the projected sales price of the underlying loans, taking into account market interest rates and other market factors at the measurement date, net of the projected fallout rate. Pinnacle Financial reflects these assets within Level 2 of the valuation hierarchy as these assets are valued using similar transactions that occur in the market. Impaired loans – A loan is classified as impaired when it is probable Pinnacle Financial will be unable to collect all principal and interest payments due in accordance with the contractual terms of the loan agreement. Impaired loans are measured based on the present value of expected payments using the loan's original effective rate as the discount rate, the loan's observable market price, or the fair value of the collateral less selling costs if the loan is collateral dependent. If the recorded investment in the impaired loan exceeds the measure of fair value, a valuation allowance may be established as a component of the allowance for loan losses or the difference may be recognized as a charge-off. Impaired loans are classified within Level 3 of the hierarchy due to the unobservable inputs used in determining their fair value such as collateral values and the borrower's underlying financial condition. Other real estate owned – Other real estate owned (OREO) represents real estate foreclosed upon by Pinnacle Bank through loan defaults by customers or acquired by deed in lieu of foreclosure. A significant portion of these amounts relate to lots, homes and development projects that are either completed or are in various stages of construction for which Pinnacle Financial believes it has adequate collateral. Upon foreclosure, the property is recorded at the lower of cost or fair value, based on appraised value, less selling costs estimated as of the date acquired with any loss recognized as a charge-off through the allowance for loan losses. Additional OREO losses for subsequent valuation downward adjustments are determined on a specific property basis and are included as a component of noninterest expense along with holding costs. Any gains or losses realized at the time of disposal are also reflected in noninterest expense, as applicable. OREO is included in Level 3 of the valuation hierarchy due to the lack of observable market inputs into the determination of fair value as appraisal values are property-specific and sensitive to the changes in the overall economic environment. Liabilities Other liabilities – Pinnacle Financial has certain liabilities carried at fair value including certain interest rate swap agreements to facilitate customer transactions, interest rate swaps designated as fair value and cash flow hedges, and interest rate locks associated with the funding for its mortgage loan originations. The fair value of these liabilities is based on Pinnacle Financial's pricing models that utilize observable market inputs and is reflected within Level 2 of the valuation hierarchy. The following tables present financial instruments measured at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 , by caption on the consolidated balance sheets and by FASB ASC 820 valuation hierarchy (as described above) (in thousands): Total carrying value in the consolidated balance sheet Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) September 30, 2019 Investment securities available-for-sale: U.S. Treasury securities $ 48,662 $ — $ 48,662 $ — U.S. government agency securities 92,246 — 92,246 — Mortgage-backed securities 1,334,517 — 1,334,517 — State and municipal securities 1,699,886 — 1,684,020 15,866 Agency-backed securities 162,733 — 162,733 — Corporate notes and other 55,391 — 55,391 — Total investment securities available-for-sale $ 3,393,435 $ — $ 3,377,569 $ 15,866 Other investments 59,195 — 25,247 33,948 Other assets 96,814 — 96,814 — Total assets at fair value $ 3,549,444 $ — $ 3,499,630 $ 49,814 Other liabilities $ 113,070 $ — $ 113,070 $ — Total liabilities at fair value $ 113,070 $ — $ 113,070 $ — December 31, 2018 Investment securities available-for-sale: U.S. Treasury securities $ 30,300 $ — $ 30,300 $ — U.S. government agency securities 70,159 — 70,159 — Mortgage-backed securities 1,310,945 — 1,310,945 — State and municipal securities 1,229,654 — 1,215,059 14,595 Agency-backed securities 375,582 — 375,582 — Corporate notes and other 67,046 — 67,046 — Total investment securities available-for-sale 3,083,686 — 3,069,091 14,595 Other investments 50,791 — 24,369 26,422 Other assets 24,524 — 24,524 — Total assets at fair value $ 3,159,001 $ — $ 3,117,984 $ 41,017 Other liabilities $ 46,550 $ — $ 46,550 $ — Total liabilities at fair value $ 46,550 $ — $ 46,550 $ — The following table presents assets measured at fair value on a nonrecurring basis as of September 30, 2019 and December 31, 2018 (in thousands): September 30, 2019 Total carrying value in the consolidated balance sheet Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) Other real estate owned $ 30,049 $ — $ — $ 30,049 Impaired loans, net (1) 41,141 — — 41,141 Total $ 71,190 $ — $ — $ 71,190 December 31, 2018 Other real estate owned $ 15,165 $ — $ — $ 15,165 Impaired loans, net (1) 40,830 — — 40,830 Total $ 55,995 $ — $ — $ 55,995 (1) Amount is net of valuation allowance of $3.6 million and $4.0 million at September 30, 2019 and December 31, 2018 , respectively, as required by ASC 310-10, "Receivables." In the case of the investment securities portfolio, Pinnacle Financial monitors the portfolio to ascertain when transfers between levels have been affected. The nature of the remaining assets and liabilities is such that transfers in and out of any level are expected to be rare. For the nine months ended September 30, 2019 , there were no transfers between Levels 1, 2 or 3. The table below includes a rollforward of the balance sheet amounts for the three and nine months ended September 30, 2019 and September 30, 2018 (including the change in fair value) for financial instruments classified by Pinnacle Financial within Level 3 of the valuation hierarchy measured at fair value on a recurring basis including changes in fair value due in part to observable factors that are part of the valuation methodology (in thousands): For the Three months ended September 30, For the Nine months ended September 30, 2019 2018 2019 2018 Available-for-sale Securities Other Available-for-sale Securities Other Available-for-sale Securities Other assets Available-for-sale Securities Other assets Fair value, beginning of period $ 15,263 $ 31,522 $ 15,290 $ 23,578 $ 14,595 $ 26,422 $ 17,029 $ 28,874 Total realized gains included in income 29 1,264 30 81 87 2,193 90 2,858 Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at period-end 574 — 34 — 1,583 — (597 ) — Purchases — 1,777 — 2,455 — 6,965 — 7,273 Issuances — — — — — — — — Settlements — (615 ) — (932 ) (399 ) (1,632 ) (1,168 ) (1,657 ) Transfers out of Level 3 — — — — — — — (12,166 ) Fair value, end of period $ 15,866 $ 33,948 $ 15,354 $ 25,182 $ 15,866 $ 33,948 $ 15,354 $ 25,182 Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at period-end $ 29 $ 1,264 $ 30 $ 81 $ 87 $ 2,193 $ 90 $ 2,858 The following methods and assumptions were used by Pinnacle Financial in estimating its fair value disclosures for financial instruments that are not measured at fair value. In cases where quoted market prices are not available, fair values are based on estimates using discounted cash flow models. Those models are significantly affected by the assumptions used, including the discount rates, estimates of future cash flows and borrower creditworthiness. The fair value estimates presented herein are based on pertinent information available to management as of September 30, 2019 and December 31, 2018 . Such amounts have not been revalued for purposes of these consolidated financial statements since those dates and, therefore, current estimates of fair value may differ significantly from the amounts presented herein. Securities held-to-maturity - Estimated fair values for investment securities are based on quoted market prices where available. If quoted market prices are not available, then fair values are estimated by using pricing models that use observable inputs or quoted prices of securities with similar characteristics. Loans - The fair value of Pinnacle Financial's loan portfolio includes a credit risk factor in the determination of the fair value of its loans. This credit risk assumption is intended to approximate the fair value that a market participant would realize in a hypothetical orderly transaction. Pinnacle Financial's loan portfolio is initially fair valued using a segmented approach. Pinnacle Financial divides its loan portfolio into the following categories: variable rate loans, impaired loans and all other loans. The results are then adjusted to account for credit risk. The values derived from the discounted cash flow approach for our performing loan portfolio incorporate credit risk to determine the exit price. Fair values for impaired loans are estimated using discounted cash flow models or are based on the fair value of the underlying collateral. Purchased loans, including loans acquired through a merger, are initially recorded at fair value on the date of purchase. Purchased loans that contain evidence of post-origination credit deterioration as of the purchase date are carried at the net present value of expected future cash flows. All other purchased loans are recorded at their initial fair value, and adjusted for subsequent advances, pay downs, amortization or accretion of any fair value premium or discount on purchase, charge-offs and any other adjustment to carrying value. Loans held-for-sale - Loans held-for-sale are carried at the lower of cost or fair value. The estimate of fair value is based on pricing models and other information. Deposits, securities sold under agreements to repurchase, Federal Home Loan Bank (FHLB) advances, subordinated debt and other borrowings - The fair value of demand deposits, savings deposits and securities sold under agreements to repurchase are derived from a selection of market transactions reflecting our peer group. Fair values for certificates of deposit, FHLB advances and subordinated debt are estimated using discounted cash flow models, using current market interest rates offered on certificates, advances and other borrowings with similar remaining maturities. Off-balance sheet instruments - The fair values of Pinnacle Financial's off-balance-sheet financial instruments are based on fees charged to enter into similar agreements. However, commitments to extend credit do not represent a significant value to Pinnacle Financial until such commitments are funded. The following table presents the carrying amounts, estimated fair value and placement in the fair value hierarchy of Pinnacle Financial's financial instruments at September 30, 2019 and December 31, 2018 . This table excludes financial instruments for which the carrying amount approximates fair value. For short-term financial assets such as cash, cash equivalents, and restricted cash, the carrying amount is a reasonable estimate of fair value due to the relatively short time between the origination of the instrument and its expected realization. For financial liabilities such as non-interest bearing demand, interest-bearing demand, and savings deposits, the carrying amount is a reasonable estimate of fair value due to these products having no stated maturity (in thousands): September 30, 2019 Carrying/ Notional Amount Estimated Fair Value (1) Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) Financial assets: Securities held-to-maturity $ 189,684 $ 202,821 $ — $ 202,821 $ — Loans, net 19,251,995 19,216,128 — — 19,216,128 Consumer loans held-for-sale 73,042 74,161 — 74,161 — Commercial loans held-for-sale 21,312 21,638 — 21,638 — Financial liabilities: Deposits and securities sold under agreements to repurchase 20,096,079 19,442,956 — — 19,442,956 Federal Home Loan Bank advances 2,052,548 2,070,645 — — 2,070,645 Subordinated debt and other borrowings 750,488 713,051 — — 713,051 Off-balance sheet instruments: Commitments to extend credit (2) 7,797,246 1,067 — — 1,067 Standby letters of credit (3) 198,361 1,297 — — 1,297 December 31, 2018 Financial assets: Securities held-to-maturity $ 194,282 $ 193,131 $ — $ 193,131 $ — Loans, net 17,623,974 17,288,795 — — 17,288,795 Consumer loans held-for-sale 34,196 34,929 — 34,929 — Commercial loans held-for-sale 15,954 16,296 — 16,296 — Financial liabilities: Deposits and securities sold under agreements to repurchase 18,953,848 18,337,848 — — 18,337,848 Federal Home Loan Bank advances 1,443,589 1,432,003 — — 1,432,003 Subordinated debt and other borrowings 485,130 464,616 — — 464,616 Off-balance sheet instruments: Commitments to extend credit (2) 6,921,689 1,733 — — 1,733 Standby letters of credit (3) 177,475 1,131 — — 1,131 (1) Estimated fair values are consistent with an exit-price concept. The assumptions used to estimate the fair values are intended to approximate those that a market-participant would realize in a hypothetical orderly transaction. (2) At the end of each quarter, Pinnacle Financial evaluates the inherent risks of the outstanding off-balance sheet commitments. In making this evaluation, Pinnacle Financial evaluates the credit worthiness of the borrower, the collateral supporting the commitments and any other factors similar to those used to evaluate the inherent risks of our loan portfolio. Additionally, Pinnacle Financial evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at September 30, 2019 and December 31, 2018 , Pinnacle Financial included in other liabilities $2.4 million and $2.9 million, respectively, representing the inherent risks associated with these off-balance sheet commitments. (3) At September 30, 2019 and December 31, 2018 , the aggregate fair value of Pinnacle Financial's standby letters of credit was $1.3 million and $1.1 million, respectively. These amounts represent the unamortized fee associated with these standby letters of credit and are included in the consolidated balance sheets of Pinnacle Financial and are believed to approximate fair value. These fair values will decrease over time as the existing standby letters of credit approach their expiration dates.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2019
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Regulatory Matters	Note 10. Regulatory Matters Pursuant to Tennessee banking law, Pinnacle Bank may not, without the prior consent of the Commissioner of the Tennessee Department of Financial Institutions (TDFI), pay any dividends to Pinnacle Financial in a calendar year in excess of the total of Pinnacle Bank's retained net income for that year plus the retained net income for the preceding two years . Under Tennessee corporate law, Pinnacle Financial is not permitted to pay dividends if, after giving effect to such payment, it would not be able to pay its debts as they become due in the usual course of business or its total assets would be less than the sum of its total liabilities plus any amounts needed to satisfy any preferential rights if it were dissolving. In addition, in deciding whether or not to declare a dividend of any particular size, Pinnacle Financial's board of directors must consider its and Pinnacle Bank's current and prospective capital, liquidity, and other needs. In addition to state law limitations on Pinnacle Financial's ability to pay dividends, the Federal Reserve imposes limitations on Pinnacle Financial's ability to pay dividends. Federal Reserve regulations limit dividends, stock repurchases and discretionary bonuses to executive officers if Pinnacle Financial's regulatory capital is below the level of regulatory minimums plus the applicable capital conservation buffer. During the nine months ended September 30, 2019 , Pinnacle Bank paid $96.3 million in dividends to Pinnacle Financial. As of September 30, 2019 , Pinnacle Bank could pay approximately $617.5 million of additional dividends to Pinnacle Financial without prior approval of the Commissioner of the TDFI. Since the fourth quarter of 2018, Pinnacle Financial has paid a quarterly common stock dividend of $0.16 per share. The amount and timing of all future dividend payments by Pinnacle Financial, if any, is subject to discretion of Pinnacle Financial's board of directors and will depend on Pinnacle Financial's earnings, capital position, financial condition and other factors, including new regulatory capital requirements, as they become known to Pinnacle Financial. Pinnacle Financial and Pinnacle Bank are subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on the financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, Pinnacle Financial and Pinnacle Bank must meet specific capital guidelines that involve quantitative measures of the assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. Pinnacle Financial's and Pinnacle Bank's capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require Pinnacle Financial and its banking subsidiary to maintain minimum amounts and ratios of common equity Tier 1 capital to risk-weighted assets, Tier 1 capital to risk-weighted assets, total risk-based capital to risk-weighted assets and Tier 1 capital to average assets. The final rules implementing the Basel Committee on Banking Supervision's capital guidelines for U.S. banks (Basel III rules) became effective for Pinnacle Financial on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in on January 1, 2019. The minimum capital level requirements applicable to bank holding companies and banks subject to the rules are: (i) a common equity Tier 1 capital ratio of 4.5%; (ii) a Tier 1 risk-based capital ratio of 6%; (iii) a total risk-based capital ratio of 8%; and (iv) a Tier 1 leverage ratio of 4% for all institutions. The Basel III rules also established a capital conservation buffer of 2.5% (which was phased in over three years) above the regulatory minimum risk-based capital ratios. The capital conservation buffer was phased in beginning in January 2016 at 0.625% and increased each year by a like percentage until fully implemented in January 2019. Upon full implementation in January 2019, minimum risk-based capital ratios including the capital conservation buffer are: i) a common equity Tier 1 capital ratio of 7%, ii) a Tier 1 risk-based capital ratio of 8.5%, and iii) a total risk-based capital ratio of 10.5%. The net unrealized gain or loss on available-for-sale securities is not included in computing regulatory capital. Management believes, as of September 30, 2019 , that Pinnacle Financial and Pinnacle Bank met all capital adequacy requirements to which they are subject. To be categorized as well-capitalized under applicable banking regulations, Pinnacle Bank must maintain certain total risk-based, Tier 1 risk-based, common equity Tier 1 and Tier 1 leverage ratios as set forth in the following table and not be subject to a written agreement, order or directive to maintain a higher capital level. The capital conservation buffer is not included in the required ratios of the table presented below. Pinnacle Financial's and Pinnacle Bank's actual capital amounts and resulting ratios, not including the capital conservation buffer, are presented in the following table (in thousands): Actual Minimum Capital Requirement Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations Amount Ratio Amount Ratio Amount Ratio At September 30, 2019 Total capital to risk weighted assets: Pinnacle Financial $ 3,093,547 13.2 % $ 1,874,904 8.0 % NA NA Pinnacle Bank $ 2,818,988 12.1 % $ 1,869,627 8.0 % $ 2,337,034 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 2,238,535 9.6 % $ 1,406,178 6.0 % NA NA Pinnacle Bank $ 2,592,976 11.1 % $ 1,402,221 6.0 % $ 1,869,627 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 2,238,413 9.6 % $ 1,054,634 4.5 % NA NA Pinnacle Bank $ 2,592,854 11.1 % $ 1,051,665 4.5 % $ 1,519,072 6.5 % Tier 1 capital to average assets (*): Pinnacle Financial $ 2,238,535 8.9 % $ 1,003,329 4.0 % NA NA Pinnacle Bank $ 2,592,976 10.4 % $ 998,695 4.0 % $ 1,248,369 5.0 % Actual Minimum Capital Requirement Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations Amount Ratio Amount Ratio Amount Ratio At December 31, 2018 Total capital to risk weighted assets: Pinnacle Financial $ 2,580,143 12.2 % $ 1,691,017 8.0 % NA NA Pinnacle Bank $ 2,432,419 11.5 % $ 1,686,046 8.0 % $ 2,107,558 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 2,024,193 9.6 % $ 1,268,263 6.0 % NA NA Pinnacle Bank $ 2,218,003 10.5 % $ 1,264,535 6.0 % $ 1,686,046 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 2,024,070 9.6 % $ 951,197 4.5 % NA NA Pinnacle Bank $ 2,217,880 10.5 % $ 948,401 4.5 % $ 1,369,912 6.5 % Tier 1 capital to average assets (*): Pinnacle Financial $ 2,024,193 8.9 % $ 909,102 4.0 % NA NA Pinnacle Bank $ 2,218,003 9.8 % $ 906,185 4.0 % $ 1,132,731 5.0 % (*) Average assets for the above calculations were based on the most recent quarter.

Subordinated Debt and Other bor

Subordinated Debt and Other borrowings	9 Months Ended
	Sep. 30, 2019
Subordinated Debt [Abstract]
Subordinated Debt and Other borrowings	Note 11. Subordinated Debt and Other Borrowings Pinnacle Financial has twelve wholly-owned subsidiaries that are statutory business trusts created for the exclusive purpose of issuing 30 -year capital trust preferred securities. Pinnacle Financial also has a $75 .0 million revolving credit facility, of which it had no outstanding borrowings as of September 30, 2019 . Additionally, Pinnacle Financial and Pinnacle Bank have entered into, or assumed in connection with acquisitions, certain other subordinated debt agreements as outlined below as of September 30, 2019 (in thousands): Name Date Maturity Total Debt Outstanding Interest Rate at Coupon Structure Trust preferred securities Pinnacle Statutory Trust I December 29, 2003 December 30, 2033 $ 10,310 4.94 % 30-day LIBOR + 2.80% Pinnacle Statutory Trust II September 15, 2005 September 30, 2035 20,619 3.50 % 30-day LIBOR + 1.40% Pinnacle Statutory Trust III September 7, 2006 September 30, 2036 20,619 3.75 % 30-day LIBOR + 1.65% Pinnacle Statutory Trust IV October 31, 2007 September 30, 2037 30,928 4.97 % 30-day LIBOR + 2.85% BNC Capital Trust I April 3, 2003 April 15, 2033 5,155 5.55 % 30-day LIBOR + 3.25% BNC Capital Trust II March 11, 2004 April 7, 2034 6,186 5.15 % 30-day LIBOR + 2.85% BNC Capital Trust III September 23, 2004 September 23, 2034 5,155 4.70 % 30-day LIBOR + 2.40% Name Date Maturity Total Debt Outstanding Interest Rate at Coupon Structure BNC Capital Trust IV September 27, 2006 December 31, 2036 7,217 3.80 % 30-day LIBOR + 1.70% Valley Financial Trust I June 26, 2003 June 26, 2033 4,124 5.21 % 30-day LIBOR + 3.10% Valley Financial Trust II September 26, 2005 December 15, 2035 7,217 3.61 % 30-day LIBOR + 1.49% Valley Financial Trust III December 15, 2006 January 30, 2037 5,155 4.00 % 30-day LIBOR + 1.73% Southcoast Capital Trust III August 5, 2005 September 30, 2035 10,310 3.60 % 30-day LIBOR + 1.50% Subordinated Debt Pinnacle Bank Subordinated Notes July 30, 2015 July 30, 2025 60,000 4.88 % Fixed (1) Pinnacle Bank Subordinated Notes March 10, 2016 July 30, 2025 70,000 4.88 % Fixed (1) Avenue Subordinated Notes December 29, 2014 December 29, 2024 20,000 6.75 % Fixed (2) Pinnacle Financial Subordinated Notes November 16, 2016 November 16, 2026 120,000 5.25 % Fixed (3) Pinnacle Financial Subordinated Notes September 11, 2019 September 15, 2029 300,000 4.13 % Fixed (4) BNC Subordinated Notes September 25, 2014 October 1, 2024 60,000 5.50 % Fixed (5) Other Borrowings Revolving credit facility (6) April 25, 2019 April 24, 2020 — 3.94 % 30-day LIBOR + 1.50% Debt issuance costs and fair value adjustments (12,507 ) Total subordinated debt and other borrowings $ 750,488 (1) Migrates to three month LIBOR + 3.128% beginning July 30, 2020 through the end of the term. (2) Migrates to three month LIBOR + 4.95% beginning January 1, 2020 through the end of the term. (3) Migrates to three month LIBOR + 3.884% beginning November 16, 2021 through the end of the term. (4) Migrates to three month LIBOR + 2.775% beginning September 15, 2024 through the end of the term. (5) Migrates to three month LIBOR + 3.59% beginning October 1, 2019 through the end of the term if not redeemed on that date. (6) Borrowing capacity on the revolving credit facility is $75 .0 million. At September 30, 2019 , there were no amounts outstanding under this facility. An unused fee of 0.30% is assessed on the average daily unused amount of the loan. On September 11, 2019, Pinnacle Financial issued $300.0 million aggregate principal amount of 4.13% Fixed-to-Floating Rate Subordinated Notes due 2029 (the 2029 Notes) in a public offering. From, and including, the date of issuance to, but excluding, September 15, 2024, the 2029 Notes will bear interest at an initial fixed rate of 4.13% per annum, payable semi-annually in arrears on March 15 and September 15, commencing on March 15, 2020. Thereafter, from September 15, 2024 through the maturity date, September 15, 2029 , or earlier redemption date, the 2029 Notes will bear interest at a floating rate equal to the then-current three month LIBOR, plus 277.5 basis points for each quarterly interest period (subject to certain provisions regarding use of an alternative base rate upon certain LIBOR transition events), payable quarterly in arrears on March 15, June 15, September 15 and December 15 of each year, commencing on September 15, 2024. The offering and sale of the 2029 Notes yielded net proceeds of approximately $296.5 million after deducting the underwriting discount and offering expenses payable by Pinnacle Financial. Pinnacle Financial used approximately $8.8 million of such proceeds to redeem the previously outstanding Subordinated Note due October 15, 2023, which Pinnacle Financial assumed in the BNC merger and which carried an interest rate of 7.23% at the time of such redemption. Pinnacle Financial intends to use approximately $210.0 million of the net proceeds of this offering to redeem certain other of its and Pinnacle Bank’s subordinated notes, including the $20.0 million aggregate principal amount of Avenue subordinated notes and $60.0 million aggregate principal amount of BNC subordinated notes, each listed in the table above. Pinnacle Financial also presently intends to redeem the $130.0 million aggregate principal amount of subordinated notes issued by Pinnacle Bank listed in the table above after such notes become eligible for redemption on July 30, 2020. The redemption of the $130.0 million aggregate principal amount of subordinated notes issued by Pinnacle Bank is subject to receipt of all regulatory permissions for such redemption, which Pinnacle Financial has not yet sought, and Pinnacle Financial’s ultimate determination to redeem such notes after they become eligible for redemption. Pinnacle Bank is under no obligation to redeem its subordinated notes. Pinnacle Financial intends to use the remainder of the net proceeds from the offering of the 2029 Notes for general corporate purposes, including providing capital to support the growth of Pinnacle Bank and Pinnacle Financial’s business.

Leases Leases

Leases Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	Note 12. Leases Pinnacle Financial has entered into, or assumed through acquisition, various operating leases, primarily for office space and branch facilities, and through acquisition assumed a single finance lease for a branch facility. Upon adoption of FASB ASU 2016-02 Leases on January 1, 2019, Pinnacle Financial began recognizing right-of-use assets and lease liabilities related to its operating leases. Prior to ASU 2016-02, such assets and liabilities were recognized only for capital leases (referred to as finance leases under the amendments of ASU 2016-02). In accordance with the optional transition method allowed by ASU 2016-11, comparative prior period information included within this note is presented in accordance with guidance in effect during those periods. Right-of-use assets and lease liabilities related to Pinnacle Financial's operating and finance leases are as follows at September 30, 2019 (in thousands): Balance Sheet Location September 30, 2019 Right-of-use assets Operating leases (1) Other assets $ 74,151 Finance leases Premises and equipment, net 2,044 Total right-of-use assets $ 76,195 Lease liabilities Operating leases Other liabilities $ 82,150 Finance leases Other liabilities 3,302 Total lease liabilities $ 85,452 (1) Presented net of tenant improvement allowances of $1.7 million and purchase accounting fair value adjustments of $2.8 million . Lease costs during the three and nine months ended September 30, 2019 related to these leases were as follows (in thousands): Three Months Ended Nine Months Ended Operating lease cost $ 3,516 $ 10,488 Short-term lease cost 43 137 Finance lease cost: Interest on lease liabilities 60 183 Amortization of right-of-use asset 56 169 Sublease income (562 ) (1,123 ) Net lease cost $ 3,113 $ 9,854 Rent expense related to leases during the three and nine months ended September 30, 2018 was $3.1 million and $9.4 million , respectively. Cash flows related to leases during the three and nine months ended September 30, 2019 were as follows (in thousands): Three Months Ended Nine Months Ended Operating cash flows related to operating leases $ 3,432 $ 10,193 Operating cash flows related to finance leases 60 183 Financing cash flows related to finance leases 57 168 Lease liabilities are determined based on lease term discounted at an effective rate of interest. Certain lease agreements contain renewal options which are considered in the determination of the lease term if they are deemed reasonably certain to be exercised. Discount rates used to determine the present value of lease payments are based on secured borrowing rates as of the commencement date of the lease. The following table presents the weighted average remaining lease term and weighted average discount rate used to determine lease liabilities at September 30, 2019 (in thousands): September 30, 2019 Weighted average remaining lease term: Operating leases 10.41 years Finance leases 9.09 years Weighted average discount rate: Operating leases 3.28 % Finance leases 7.22 % The following table presents a maturity analysis of undiscounted cash flows due under operating leases and finance leases and a reconciliation to total operating lease liabilities and finance lease liabilities at September 30, 2019 (in thousands): Operating Leases Finance Leases 2019 (1) $ 3,403 $ 118 2020 12,992 470 2021 12,383 470 2022 10,619 470 2023 9,768 479 Thereafter 50,329 2,548 99,494 4,555 Less: Imputed interest (17,344 ) (1,253 ) Total lease liabilities $ 82,150 $ 3,302 (1) Includes the period from October 1, 2019 through December 31, 2019. At December 31, 2018, the future minimum lease payments due under operating leases and capital leases, and a reconciliation to total capital lease liabilities were as follows (in thousands): Operating Leases Capital Leases 2019 $ 12,889 $ 470 2020 11,805 470 2021 11,527 470 2022 9,410 470 2023 8,820 479 Thereafter 43,730 2,548 Future minimum lease payments $ 98,181 4,907 Less: Imputed interest (1,437 ) Total capital lease liabilities $ 3,470
Leases	Leases Pinnacle Financial has entered into, or assumed through acquisition, various operating leases, primarily for office space and branch facilities, and through acquisition assumed a single finance lease for a branch facility. Upon adoption of FASB ASU 2016-02 Leases on January 1, 2019, Pinnacle Financial began recognizing right-of-use assets and lease liabilities related to its operating leases. Prior to ASU 2016-02, such assets and liabilities were recognized only for capital leases (referred to as finance leases under the amendments of ASU 2016-02). In accordance with the optional transition method allowed by ASU 2016-11, comparative prior period information included within this note is presented in accordance with guidance in effect during those periods. Right-of-use assets and lease liabilities related to Pinnacle Financial's operating and finance leases are as follows at September 30, 2019 (in thousands): Balance Sheet Location September 30, 2019 Right-of-use assets Operating leases (1) Other assets $ 74,151 Finance leases Premises and equipment, net 2,044 Total right-of-use assets $ 76,195 Lease liabilities Operating leases Other liabilities $ 82,150 Finance leases Other liabilities 3,302 Total lease liabilities $ 85,452 (1) Presented net of tenant improvement allowances of $1.7 million and purchase accounting fair value adjustments of $2.8 million . Lease costs during the three and nine months ended September 30, 2019 related to these leases were as follows (in thousands): Three Months Ended Nine Months Ended Operating lease cost $ 3,516 $ 10,488 Short-term lease cost 43 137 Finance lease cost: Interest on lease liabilities 60 183 Amortization of right-of-use asset 56 169 Sublease income (562 ) (1,123 ) Net lease cost $ 3,113 $ 9,854 Rent expense related to leases during the three and nine months ended September 30, 2018 was $3.1 million and $9.4 million , respectively. Cash flows related to leases during the three and nine months ended September 30, 2019 were as follows (in thousands): Three Months Ended Nine Months Ended Operating cash flows related to operating leases $ 3,432 $ 10,193 Operating cash flows related to finance leases 60 183 Financing cash flows related to finance leases 57 168 Lease liabilities are determined based on lease term discounted at an effective rate of interest. Certain lease agreements contain renewal options which are considered in the determination of the lease term if they are deemed reasonably certain to be exercised. Discount rates used to determine the present value of lease payments are based on secured borrowing rates as of the commencement date of the lease. The following table presents the weighted average remaining lease term and weighted average discount rate used to determine lease liabilities at September 30, 2019 (in thousands): September 30, 2019 Weighted average remaining lease term: Operating leases 10.41 years Finance leases 9.09 years Weighted average discount rate: Operating leases 3.28 % Finance leases 7.22 % The following table presents a maturity analysis of undiscounted cash flows due under operating leases and finance leases and a reconciliation to total operating lease liabilities and finance lease liabilities at September 30, 2019 (in thousands): Operating Leases Finance Leases 2019 (1) $ 3,403 $ 118 2020 12,992 470 2021 12,383 470 2022 10,619 470 2023 9,768 479 Thereafter 50,329 2,548 99,494 4,555 Less: Imputed interest (17,344 ) (1,253 ) Total lease liabilities $ 82,150 $ 3,302 (1) Includes the period from October 1, 2019 through December 31, 2019. At December 31, 2018, the future minimum lease payments due under operating leases and capital leases, and a reconciliation to total capital lease liabilities were as follows (in thousands): Operating Leases Capital Leases 2019 $ 12,889 $ 470 2020 11,805 470 2021 11,527 470 2022 9,410 470 2023 8,820 479 Thereafter 43,730 2,548 Future minimum lease payments $ 98,181 4,907 Less: Imputed interest (1,437 ) Total capital lease liabilities $ 3,470

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation — The accompanying unaudited consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles (U.S. GAAP). All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods covered by the report have been included. The accompanying unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes appearing in Pinnacle Financial's Annual Report on Form 10-K for the year ended December 31, 2018 (2018 10-K). These consolidated financial statements include the accounts of Pinnacle Financial and its wholly-owned subsidiaries. Certain statutory trust affiliates of Pinnacle Financial, as noted in Note 11. Subordinated Debt and Other Borrowings are included in these consolidated financial statements pursuant to the equity method of accounting. Significant intercompany transactions and accounts are eliminated in consolidation.
Use of Estimates	Use of Estimates — The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term include the determination of the allowance for loan losses and determination of any impairment of intangible assets. There have been no significant changes to Pinnacle Financial's significant accounting policies as disclosed in the 2018 10-K.
Income Per Common Share	Income Per Common Share — Basic net income per common share (EPS) is computed by dividing net income by the weighted average common shares outstanding for the period. Diluted EPS reflects the dilution that could occur if securities or other contracts to issue common stock were exercised or converted. The difference between basic and diluted weighted average common shares outstanding is attributable to common stock options, restricted share awards, and restricted share unit awards. The dilutive effect of outstanding options, restricted share awards, and restricted share unit awards is reflected in diluted EPS by application of the treasury stock method. The following is a summary of the basic and diluted net income per share calculations for the three and nine months ended September 30, 2019 and 2018 (in thousands, except per share data): Three months ended Nine months ended 2019 2018 2019 2018 Basic net income per share calculation: Numerator - Net income $ 110,521 $ 93,747 $ 304,802 $ 264,122 Denominator - Weighted average common shares outstanding 76,301 77,145 76,481 77,116 Basic net income per common share $ 1.45 $ 1.22 $ 3.99 $ 3.42 Diluted net income per share calculation: Numerator – Net income $ 110,521 $ 93,747 $ 304,802 $ 264,122 Denominator - Weighted average common shares outstanding 76,301 77,145 76,481 77,116 Dilutive shares contingently issuable 255 346 280 326 Weighted average diluted common shares outstanding 76,556 77,491 76,761 77,443 Diluted net income per common share $ 1.44 $ 1.21 $ 3.97 $ 3.41
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements — In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases which requires recognition in the statement of financial position of lease right of use assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP guidance. The guidance requires that a lessee should recognize lease assets and lease liabilities as compared to previous GAAP guidance that did not require lease assets and lease liabilities to be recognized for operating leases. In July 2016, the FASB issued Accounting Standards Update 2018-10, Codification Improvements to Topic 842, Leases which provided technical corrections and improvements to ASU 2016-02. In July 2016, the FASB issued Accounting Standards Update 2018-11, Leases (Topic 842): Targeted Improvements which provided an optional transition method to adopt the new requirements of ASU 2016-02 as of the adoption date with no adjustment to the presentation or disclosure of comparative prior periods included in the financial statements in the period of adoption. Pinnacle Financial has elected this optional transition method and has presented periods prior to adoption under the prior lease guidance of ASC Topic 840. In December 2018, the FASB issued Accounting Standards Update 2018-20, Leases (Topic 842): Narrow-Scope Improvements for Lessors . ASU 2018-20 permits lessors to account for certain taxes as lessee costs, permits lessors to exclude from revenue certain lessor costs paid by lessees directly to third parties, and requires lessors to allocate certain variable payments to lease and non-lease components. In March 2019, the FASB issued Accounting Standards Update No. 2019-01, Leases (Topic 842): Codification Improvements. The amendments in this ASU (i) reinstate the exception in Topic 842 for lessors that are not manufacturers or dealers to use cost as the fair value of the underlying asset, (ii) state that lessors that are depository and lending institutions should present principal payments received under sales type and direct financing leases within investing activities, and (iii) exempt Topic 842 from certain transition related interim disclosure requirements. ASU 2016-02 and the subsequently issued ASUs related to Topic 842 became effective for Pinnacle Financial on January 1, 2019. As part of the adoption of these updates, Pinnacle Financial has elected the following practical expedients: 1) to not reassess whether existing contracts are or contain a lease, 2) to not reassess lease classification for existing leases, 3) to not reassess initial direct costs, 4) to not separate lease components from nonlease components for real estate leases, and 5) to not recognize short term leases (12 months or less) on the balance sheet. See Note 12 for additional detail related to lease amounts recognized as of September 30, 2019 under Topic 842. In February 2018, the FASB issued Accounting Standards Update 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . The amendments in this ASU addressed the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the lower federal corporate tax rate included in the Tax Cuts and Jobs Act issued December 22, 2017 (Tax Act). These amendments allow an entity to make a reclassification from other comprehensive income to retained earnings for the difference between the historical corporate income tax rate and the lower corporate income tax rate included in the Tax Act. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those years. Pinnacle Financial has elected not to adopt this standard due to its insignificant impact on Pinnacle Financial's consolidated financial position.
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	Newly Issued not yet Effective Accounting Standards — In January 2017, the FASB issued Accounting Standards Update No. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment to simplify how entities other than private companies, such as public business entities and not-for-profit entities, are required to test goodwill for impairment by eliminating the comparison of the implied fair value of the reporting unit's goodwill with the carrying amount of that goodwill. The amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those periods. If this standard had been effective as of the date of the financial statements included in this report, there would have been no impact on Pinnacle Financial's consolidated financial statements. In June 2016, the FASB issued Accounting Standards Update 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments (CECL) , which introduces the current expected credit losses methodology. Among other things, CECL requires the measurement of all expected credit losses for financial assets, including loans and held-to-maturity debt securities, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The new model will require institutions to calculate all probable and estimable losses that are expected to be incurred through the financial asset's entire life through a provision for credit losses, including loans obtained as a result of any acquisition not deemed to be purchased credit deteriorated (PCD). CECL also requires the allowance for credit losses for PCD loans to be determined in a manner similar to that of other financial assets measured at amortized cost; however, the initial allowance will be added to the purchase price rather than recorded as provision expense. The disclosure of credit quality indicators related to the amortized cost of financing receivables will be further disaggregated by year of origination (or vintage). Institutions are to apply the changes through a cumulative-effect adjustment to their retained earnings as of the beginning of the first reporting period in which the standard is effective. The amendments are effective for fiscal years beginning after December 15, 2019. Early application is permitted for fiscal years beginning after December 15, 2018. Management continues to evaluate the impact this ASU will have on Pinnacle Financial’s financial position, results of operations and financial statement disclosures and determine the most appropriate method to implement the guidance. Pinnacle Financial has established a cross-functional Current Expected Credit Loss (CECL) Steering Committee, which includes members from the accounting, treasury, credit and lending functions, with involvement from members of model risk management, independent loan review and internal audit. Pinnacle Financial is leveraging both internal and external expertise in the development of the models that will be utilized in the determination of the allowance for credit losses determined pursuant to CECL. At this time, Pinnacle Financial is focused on the finalization of the model validations as well as development of process and related controls and the financial statement disclosures. Pinnacle Financial has concluded that an increase in the overall allowance for loan losses is likely upon adoption of CECL in order to provide for expected credit losses over the life of the loan portfolio. Other than those pronouncements discussed above and those which have been recently adopted, we do not believe there were any other recently issued accounting pronouncements that are expected to materially impact Pinnacle Financial.
Reclassifications [Text Block]	Reclassifications — Some items in the prior year financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior year net income or stockholders' equity.
Subsequent Events	Subsequent Events — ASC Topic 855, Subsequent Events, establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued. Pinnacle Financial evaluated all events or transactions that occurred after September 30, 2019 through the date of the issued financial statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Supplemental Cash Flow Information	Cash Flow Information — Supplemental cash flow information addressing certain cash and noncash transactions for the nine months ended September 30, 2019 and September 30, 2018 was as follows (in thousands): For the nine months ended 2019 2018 Cash Transactions: Interest paid $ 216,261 $ 136,154 Income taxes paid, net 61,238 55,525 Noncash Transactions: Loans charged-off to the allowance for loan losses 21,328 22,316 Loans foreclosed upon and transferred to other real estate owned 16,870 2,066 Loans foreclosed upon and transferred to other assets 93 1,580 Other real estate sales financed — 276 Fixed assets transferred to other real estate owned 5,126 — Available-for-sale securities transferred to held-to-maturity portfolio — 179,763 Held-for-sale loans transferred to held-for-investment loan portfolio — 44,980 Right-of-use asset recognized during the period in exchange for lease obligations (1) 82,856 — (1) Includes $79.9 million recognized upon initial adoption of ASU 2016-02 on January 1, 2019.
Basic and Diluted Earnings Per Share Calculations	The following is a summary of the basic and diluted net income per share calculations for the three and nine months ended September 30, 2019 and 2018 (in thousands, except per share data): Three months ended Nine months ended 2019 2018 2019 2018 Basic net income per share calculation: Numerator - Net income $ 110,521 $ 93,747 $ 304,802 $ 264,122 Denominator - Weighted average common shares outstanding 76,301 77,145 76,481 77,116 Basic net income per common share $ 1.45 $ 1.22 $ 3.99 $ 3.42 Diluted net income per share calculation: Numerator – Net income $ 110,521 $ 93,747 $ 304,802 $ 264,122 Denominator - Weighted average common shares outstanding 76,301 77,145 76,481 77,116 Dilutive shares contingently issuable 255 346 280 326 Weighted average diluted common shares outstanding 76,556 77,491 76,761 77,443 Diluted net income per common share $ 1.44 $ 1.21 $ 3.97 $ 3.41

Equity method investment (Table

Equity method investment (Tables)	9 Months Ended
	Sep. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	A summary of BHG's financial position as of September 30, 2019 and December 31, 2018 and results of operations as of and for the three and nine months ended September 30, 2019 and 2018 , were as follows (in thousands): As of September 30, 2019 December 31, 2018 Assets $ 695,300 $ 459,816 Liabilities 499,460 324,211 Equity interests 195,840 135,605 Total liabilities and equity $ 695,300 $ 459,816 For the three months ended For the nine months ended 2019 2018 2019 2018 Revenues $ 108,770 $ 59,133 $ 279,569 $ 151,937 Net income $ 61,364 $ 30,933 $ 156,064 $ 69,039

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Fair Value of Available-for-sale and Held-to-maturity Securities	The amortized cost and fair value of securities available-for-sale and held-to-maturity at September 30, 2019 and December 31, 2018 are summarized as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2019: Securities available-for-sale: U.S. Treasury securities $ 48,635 $ 31 $ 4 $ 48,662 U.S. government agency securities 92,668 412 834 92,246 Mortgage-backed securities 1,318,953 19,229 3,665 1,334,517 State and municipal securities 1,658,734 54,839 13,687 1,699,886 Asset-backed securities 163,334 601 1,202 162,733 Corporate notes and other 55,667 565 841 55,391 $ 3,337,991 $ 75,677 $ 20,233 $ 3,393,435 Securities held-to-maturity: State and municipal securities $ 189,684 $ 13,137 $ — $ 202,821 $ 189,684 $ 13,137 $ — $ 202,821 December 31, 2018: Securities available-for-sale: U.S. Treasury securities $ 30,325 $ — $ 25 $ 30,300 U.S. government agency securities 71,456 49 1,346 70,159 Mortgage-backed securities 1,336,469 3,110 28,634 1,310,945 State and municipal securities 1,259,267 1,126 30,739 1,229,654 Asset-backed securities 379,107 820 4,345 375,582 Corporate notes and other 69,399 170 2,523 67,046 $ 3,146,023 $ 5,275 67,612 $ 3,083,686 Securities held-to-maturity: State and municipal securities $ 194,282 $ 152 $ 1,303 $ 193,131 $ 194,282 $ 152 $ 1,303 $ 193,131
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of debt securities as of September 30, 2019 by contractual maturity are shown below. Actual maturities may differ from contractual maturities of mortgage- and asset-backed securities since the mortgages and assets underlying the securities may be called or prepaid with or without penalty. Therefore, these securities are not included in the maturity categories in the following summary (in thousands): Available-for-sale Held-to-maturity September 30, 2019: Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 63,488 $ 63,507 $ 1,394 $ 1,394 Due in one year to five years 16,772 16,986 — — Due in five years to ten years 106,774 107,322 5,775 5,877 Due after ten years 1,668,670 1,708,370 182,515 195,550 Mortgage-backed securities 1,318,953 1,334,517 — — Asset-backed securities 163,334 162,733 — — $ 3,337,991 $ 3,393,435 $ 189,684 $ 202,821
Classification of Investments According to Term of Unrealized Losses of Less than Twelve Months or Twelve Months or Longer	At September 30, 2019 and December 31, 2018 , the following investments had unrealized losses. The table below classifies these investments according to the term of the unrealized losses of less than twelve months or twelve months or longer (in thousands): Investments with an Unrealized Loss of less than 12 months Investments with an Unrealized Loss of 12 months or longer Total Investments with an Unrealized Loss Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses At September 30, 2019 U.S. Treasury securities $ 9,622 $ 4 $ — $ — $ 9,622 $ 4 U.S. government agency securities 2,942 5 33,247 829 36,189 834 Mortgage-backed securities 116,784 515 210,395 3,150 327,179 3,665 State and municipal securities 214,033 1,874 383,023 11,813 597,056 13,687 Asset-backed securities 69,921 699 57,709 503 127,630 1,202 Corporate notes 14,959 120 12,053 721 27,012 841 Total temporarily-impaired securities $ 428,261 $ 3,217 $ 696,427 $ 17,016 $ 1,124,688 $ 20,233 At December 31, 2018 U.S. Treasury securities $ 30,054 $ 22 $ 246 $ 3 $ 30,300 $ 25 U.S. government agency securities 13,697 328 42,539 1,018 56,236 1,346 Mortgage-backed securities 203,299 2,134 882,231 26,500 1,085,530 28,634 Investments with an Unrealized Loss of less than 12 months Investments with an Unrealized Loss of 12 months or longer Total Investments with an Unrealized Loss Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses State and municipal securities 1,044,757 30,780 198,610 4,078 1,243,367 34,858 Asset-backed securities 268,677 4,118 11,828 227 280,505 4,345 Corporate notes 26,272 1,538 25,915 985 52,187 2,523 Total temporarily-impaired securities $ 1,586,756 $ 38,920 $ 1,161,369 $ 32,811 $ 2,748,125 $ 71,731

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Loan Classification Categorized by Risk Rating Category	The following table outlines the amount of each loan classification categorized into each risk rating category as of September 30, 2019 and December 31, 2018 (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer Total September 30, 2019 Pass $ 7,478,442 $ 2,983,694 $ 2,244,217 $ 5,648,775 $ 465,607 $ 18,820,735 Special Mention 89,057 5,771 2,846 95,743 710 194,127 Substandard (1) 119,155 12,948 4,193 121,160 61 257,517 Substandard-nonaccrual 22,591 23,089 2,047 25,360 176 73,263 Doubtful-nonaccrual — — — — — — Total loans $ 7,709,245 $ 3,025,502 $ 2,253,303 $ 5,891,038 $ 466,554 $ 19,345,642 Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer Total December 31, 2018 Pass $ 6,998,485 $ 2,787,570 $ 2,059,376 $ 5,148,726 $ 352,516 $ 17,346,673 Special Mention 55,932 7,902 4,334 24,284 711 93,163 Substandard (1) 78,202 20,906 5,358 75,351 62 179,879 Substandard-nonaccrual 32,335 28,069 3,387 23,060 983 87,834 Doubtful-nonaccrual — — — — — — Total loans $ 7,164,954 $ 2,844,447 $ 2,072,455 $ 5,271,421 $ 354,272 $ 17,707,549 (1) Potential problem loans represent those loans with a well-defined weakness and where information about possible credit problems of borrowers has caused management to have doubts about the borrower's ability to comply with present repayment terms. This definition is believed to be substantially consistent with the standards established by Pinnacle Bank's primary regulators for loans classified as substandard, excluding troubled debt restructurings. Potential problem loans, which are not included in nonaccrual loans, amounted to approximately $254.0 million at September 30, 2019 , compared to $176.3 million at December 31, 2018
Purchase Credit Impaired Loans	Loans acquired with deteriorated credit quality are recorded pursuant to the provisions of ASC 310-30, and are referred to as purchased credit impaired loans. The following table provides a rollforward of purchased credit impaired loans from December 31, 2018 through September 30, 2019 (in thousands): Gross Carrying Value Accretable Yield Nonaccretable Yield Net Carrying Value December 31, 2018 $ 42,837 $ (114 ) $ (17,394 ) $ 25,329 Acquisition 1,883 — — 1,883 Reclassification of yield from nonaccretable to accretable — (7,505 ) 7,505 — Year-to-date settlements (12,020 ) 1,451 4,229 (6,340 ) September 30, 2019 $ 32,700 $ (6,168 ) $ (5,660 ) $ 20,872
Summary of Recorded Investment, Unpaid Principal Balance and Related Allowance and Average Recorded Investment of Impaired Loans	Impaired loans include nonaccrual loans, troubled debt restructurings, and other loans deemed to be impaired but that continue to accrue interest. The following tables detail the recorded investment, unpaid principal balance and related allowance of Pinnacle Financial's impaired loans at September 30, 2019 and December 31, 2018 by loan classification (in thousands): At September 30, 2019 At December 31, 2018 Recorded investment Unpaid principal balances Related allowance Recorded investment Unpaid principal balances Related allowance Impaired loans with an allowance: Commercial real estate – mortgage $ 13,462 $ 13,472 $ 1,021 $ 14,114 $ 14,124 $ 724 Consumer real estate – mortgage 19,245 19,368 1,065 19,864 19,991 1,443 Construction and land development 275 271 15 581 579 28 Commercial and industrial 11,591 11,566 1,497 9,252 9,215 1,441 At September 30, 2019 At December 31, 2018 Recorded investment Unpaid principal balances Related allowance Recorded investment Unpaid principal balances Related allowance Consumer and other 176 174 10 983 1,005 328 Total $ 44,749 $ 44,851 $ 3,608 $ 44,794 $ 44,914 $ 3,964 Impaired loans without an allowance: Commercial real estate – mortgage $ 8,356 $ 8,366 $ — $ 14,724 $ 14,739 $ — Consumer real estate – mortgage 4,960 4,958 — 7,247 7,271 — Construction and land development 20 19 — 1,786 1,786 — Commercial and industrial 12,897 12,890 — 14,595 14,627 — Consumer and other — — — — — — Total $ 26,233 $ 26,233 $ — $ 38,352 $ 38,423 $ — Total impaired loans $ 70,982 $ 71,084 $ 3,608 $ 83,146 $ 83,337 $ 3,964 For the three and nine months ended September 30, 2019 , the average balance of impaired loans, was $73.6 million and $81.6 million, respectively, compared to $82.3 million and $73.3 million, respectively, for the same periods in 2018 . Pinnacle Financial's policy is that the accrual of interest income will be discontinued when (1) there is a significant deterioration in the financial condition of the borrower and full repayment of principal and interest is not expected or (2) the principal or interest is more than 90 days past due, unless the loan is both well secured and in the process of collection. As such, at the date loans are placed on nonaccrual status, Pinnacle Financial reverses all previously accrued interest income against current year earnings. Pinnacle Financial's policy is that once a loan is placed on nonaccrual status each subsequent payment is reviewed on a case-by-case basis to determine if the payment should be applied to interest or principal pursuant to regulatory guidelines. As detailed in the following table, Pinnacle Financial recognized no interest income from cash payments received on nonaccrual loans during the three months ended September 30, 2019 and $176,000 in interest income from cash payments received on nonaccrual loans during the nine months ended September 30, 2019 , compared to $84,000 and $337,000 , respectively, during the three and nine months ended September 30, 2018 . Had these nonaccruing loans been on accruing status, interest income would have been higher by $1.3 million and $3.5 million, respectively, for the three and nine months ended September 30, 2019 compared to $1.1 million and $2.8 million higher, respectively, for the three and nine months ended September 30, 2018 . The following table details the average recorded investment and the amount of interest income recognized on a cash basis for the three and nine months ended September 30, 2019 and 2018 , respectively, of impaired loans by loan classification (in thousands): For the three months ended For the nine months ended 2019 2018 2019 2018 Average recorded investment Interest income recognized Average recorded investment Interest income recognized Average recorded investment Interest income recognized Average recorded investment Interest income recognized Impaired loans with an allowance: Commercial real estate – mortgage $ 13,050 $ — $ 13,474 $ — $ 14,689 $ — $ 9,297 $ — Consumer real estate – mortgage 19,508 — 14,162 — 20,887 — 11,476 — Construction and land development 451 — 1,150 — 587 — 1,301 — Commercial and industrial 11,113 — 7,470 — 10,070 — 9,345 — Consumer and other 143 — 912 — 400 — 651 — Total $ 44,265 $ — $ 37,168 $ — $ 46,633 $ — $ 32,070 $ — Impaired loans without an allowance: Commercial real estate – mortgage $ 9,344 $ — $ 22,029 $ 84 $ 12,521 $ 176 $ 18,702 $ 337 Consumer real estate – mortgage 7,922 — 5,699 — 8,381 — 5,034 — Construction and land development 10 — 1,442 — 452 — 1,382 — Commercial and industrial 12,108 — 16,008 — 13,625 — 16,096 — Consumer and other — — — — — — — — Total $ 29,384 $ — $ 45,178 $ 84 $ 34,979 $ 176 $ 41,214 $ 337 Total impaired loans $ 73,649 $ — $ 82,346 $ 84 $ 81,612 $ 176 $ 73,284 $ 337
Troubled Debt Restructurings	The following table outlines the amount of each loan category where troubled debt restructurings were made during the three and nine months ended September 30, 2019 and 2018 (dollars in thousands): Three Months Ended Nine Months Ended 2019 Number Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, net of related allowance Number Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, net of related allowance Commercial real estate – mortgage 1 $ 314 $ 297 1 $ 314 $ 297 Consumer real estate – mortgage — — — 1 712 626 Construction and land development — — — 1 21 19 Commercial and industrial — — — 1 1,397 796 Consumer and other — — — — — — 1 $ 314 $ 297 4 $ 2,444 $ 1,738 2018 Commercial real estate – mortgage — $ — $ — — $ — $ — Consumer real estate – mortgage 1 169 169 2 206 206 Construction and land development 1 348 348 1 348 348 Commercial and industrial — — — — — — Consumer and other — — — — — — 2 $ 517 $ 517 3 $ 554 $ 554
Summary of Loan Portfolio Credit Risk Exposure	Pinnacle Financial utilizes broadly accepted industry classification systems in order to classify borrowers into various industry classifications. Pinnacle Financial has a credit exposure (loans outstanding plus unfunded lines of credit) exceeding 25% of Pinnacle Bank's total risk-based capital to borrowers in the following industries at September 30, 2019 with the comparative exposures for December 31, 2018 (in thousands): September 30, 2019 Outstanding Principal Balances Unfunded Commitments Total exposure Total Exposure at December 31, 2018 Lessors of nonresidential buildings $ 3,502,181 $ 826,157 $ 4,328,338 $ 3,932,059 Lessors of residential buildings 1,003,401 549,949 1,553,350 1,484,697 New Housing For-Sale Builders 516,646 580,917 1,097,563 1,100,989 Hotels (except Casino Hotels) and Motels 806,089 167,696 973,785 920,001
Past Due Balances by Loan Classification	The table below presents past due balances by loan classification and segment at September 30, 2019 and December 31, 2018 , allocated between accruing and nonaccrual status (in thousands): Accruing Nonaccruing September 30, 2019 30-89 days past due and accruing 90 days or more past due and accruing Total past due and accruing Current and accruing Purchased credit impaired Nonaccrual (1) Nonaccruing purchased credit impaired (1) Total loans Commercial real estate: Owner-occupied $ 6,398 $ — $ 6,398 $ 2,574,628 $ 2,903 $ 11,011 $ 897 $ 2,595,837 All other 5,896 — 5,896 5,091,660 5,169 10,640 43 5,113,408 Consumer real estate – mortgage 9,051 773 9,824 2,989,373 3,216 19,245 3,844 3,025,502 Construction and land development 2,005 — 2,005 2,247,977 1,274 275 1,772 2,253,303 Commercial and industrial 16,524 1,077 17,601 5,847,752 325 23,931 1,429 5,891,038 Consumer and other 3,266 600 3,866 462,512 — 176 — 466,554 Total $ 43,140 $ 2,450 $ 45,590 $ 19,213,902 $ 12,887 $ 65,278 $ 7,985 $ 19,345,642 Accruing Nonaccruing December 31, 2018 30-89 days past due and accruing 90 days or more past due and accruing Total past due and accruing Current and accruing Purchased credit impaired Nonaccrual (1) Nonaccruing purchased credit impaired (1) Total loans Commercial real estate: Owner-occupied $ 10,170 $ — $ 10,170 $ 2,623,700 $ 2,664 $ 16,025 $ 874 $ 2,653,433 All other 1,586 — 1,586 4,488,840 5,659 12,634 2,802 4,511,521 Consumer real estate – mortgage 18,059 — 18,059 2,794,630 3,689 22,564 5,505 2,844,447 Construction and land development 3,759 — 3,759 2,063,201 2,108 2,020 1,367 2,072,455 Commercial and industrial 21,451 1,082 22,533 5,225,205 623 23,022 38 5,271,421 Consumer and other 3,276 476 3,752 349,537 — 983 — 354,272 Total $ 58,301 $ 1,558 $ 59,859 $ 17,545,113 $ 14,743 $ 77,248 $ 10,586 $ 17,707,549 (1) Approximately $33.5 million and $52.5 million of nonaccrual loans as of September 30, 2019 and December 31, 2018 , respectively, were performing pursuant to their contractual terms at those dates .
Details of Changes in the Allowance for Loan Losses	The following table details the changes in the allowance for loan losses for the three and nine months ended September 30, 2019 and 2018 , respectively, by loan classification (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total Three months ended September 30, 2019: Balance at June 30, 2019 $ 30,826 $ 8,489 $ 11,206 $ 37,436 $ 2,114 $ 182 $ 90,253 Charged-off loans (102 ) (194 ) (14 ) (5,082 ) (1,388 ) — (6,780 ) Recovery of previously charged-off loans 209 901 97 407 300 — 1,914 Provision for loan losses 1,684 (1,426 ) 585 1,814 3,278 2,325 8,260 Balance at September 30, 2019 $ 32,617 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 Three months ended September 30, 2018: Balance at June 30, 2018 $ 24,848 $ 5,853 $ 10,984 $ 28,338 $ 5,172 $ 475 $ 75,670 Charged-off loans (1,968 ) (262 ) (24 ) (3,336 ) (1,359 ) — (6,949 ) Recovery of previously charged-off loans 63 987 70 1,037 382 — 2,539 Provision for loan losses 3,574 149 (48 ) 4,085 618 347 8,725 Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total Balance at September 30, 2018 $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 Nine months ended September 30, 2019: Balance at December 31, 2018 $ 26,946 $ 7,670 $ 11,128 $ 31,731 $ 5,423 $ 677 $ 83,575 Charged-off loans (1,701 ) (1,124 ) (18 ) (13,842 ) (4,643 ) — (21,328 ) Recovery of previously charged-off loans 1,173 1,642 238 4,749 959 — 8,761 Provision for loan losses 6,199 (418 ) 526 11,937 2,565 1,830 22,639 Balance at September 30, 2019 $ 32,617 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 Nine months ended September 30, 2018: Balance at December 31, 2017 $ 21,188 $ 5,031 $ 8,962 $ 24,863 $ 5,874 $ 1,322 $ 67,240 Charged-off loans (2,930 ) (1,533 ) (36 ) (7,600 ) (10,217 ) — (22,316 ) Recovery of previously charged-off loans 1,517 2,190 1,645 2,492 2,159 — 10,003 Provision for loan losses 6,742 1,039 411 10,369 6,997 (500 ) 25,058 Balance at September 30, 2018 $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 The following table details the allowance for loan losses and recorded investment in loans by loan classification and by impairment evaluation method as of September 30, 2019 and December 31, 2018 , respectively (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total September 30, 2019 Allowance for Loan Losses: Collectively evaluated for impairment $ 31,596 $ 6,705 $ 11,859 $ 33,078 $ 4,294 $ 87,532 Individually evaluated for impairment 1,021 1,065 15 1,497 10 3,608 Loans acquired with deteriorated credit quality (1) — — — — — — Total allowance for loan losses $ 32,617 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 Loans: Collectively evaluated for impairment $ 7,678,415 $ 2,994,237 $ 2,249,962 $ 5,864,796 $ 466,378 $ 19,253,788 Individually evaluated for impairment 21,818 24,205 295 24,488 176 70,982 Loans acquired with deteriorated credit quality 9,012 7,060 3,046 1,754 — 20,872 Total loans $ 7,709,245 $ 3,025,502 $ 2,253,303 $ 5,891,038 $ 466,554 $ 19,345,642 December 31, 2018 Allowance for Loan Losses: Collectively evaluated for impairment $ 26,222 $ 6,227 $ 11,100 $ 30,290 $ 5,095 $ 78,934 Individually evaluated for impairment 724 1,443 28 1,441 328 3,964 Loans acquired with deteriorated credit quality (1) — — — — — — Total allowance for loan losses $ 26,946 $ 7,670 $ 11,128 $ 31,731 $ 5,423 $ 677 $ 83,575 Loans: Collectively evaluated for impairment $ 7,124,117 $ 2,808,142 $ 2,066,613 $ 5,246,913 $ 353,289 $ 17,599,074 Individually evaluated for impairment 28,838 27,111 2,367 23,847 983 83,146 Loans acquired with deteriorated credit quality 11,999 9,194 3,475 661 — 25,329 Total loans $ 7,164,954 $ 2,844,447 $ 2,072,455 $ 5,271,421 $ 354,272 $ 17,707,549 (1) Loans acquired with deteriorated credit quality are recorded at fair value at the time of acquisition. An allowance for loan losses is recorded only in the event of subsequent credit deterioration.

Stock Options and Restricted _2

Stock Options and Restricted Shares (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Summary of Stock Option Activity	A summary of the stock option activity within the equity incentive plans during the nine months ended September 30, 2019 and information regarding expected vesting, contractual terms remaining, intrinsic values and other matters is as follows: Number Weighted-Average Exercise Price Weighted-Average Contractual Remaining Term (in years) Aggregate Intrinsic Value (000's) Outstanding at December 31, 2018 176,709 $ 22.77 2.23 $ 4,123 (1) Granted — Exercised (10,285 ) Forfeited — Outstanding at September 30, 2019 166,424 $ 22.69 2.54 $ 5,732 (2) Options exercisable at September 30, 2019 166,424 $ 22.69 2.54 $ 5,732 (2) (1) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of Pinnacle Financial common stock of $46.10 per common share at December 31, 2018 for the 176,709 options that were in-the-money at December 31, 2018 . (2) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of Pinnacle Financial common stock of $56.75 per common share at September 30, 2019 for the 166,424 options that were in-the-money at September 30, 2019 .
Summary of Activity for Unvested Restricted Share Awards	A summary of activity for unvested restricted share awards for the nine months ended September 30, 2019 is as follows: Number Grant Date Weighted-Average Cost Unvested at December 31, 2018 692,806 $ 55.19 Shares awarded 228,760 Restrictions lapsed and shares released to associates/directors (296,878 ) Shares forfeited (1) (28,875 ) Unvested at September 30, 2019 595,813 $ 53.21 (1) Represents shares forfeited due to employee termination and/or retirement. No shares were forfeited due to failure to meet performance targets. Pinnacle Financial has granted restricted share awards to associates and outside directors with a time-based vesting criteria. Compensation expense associated with time-based vesting restricted share awards is recognized over the time period that the restrictions associated with the awards lapse on a straight-line basis based on the total cost of the award. The following table outlines restricted stock grants that were made, grouped by similar vesting criteria, during the nine months ended September 30, 2019 . The table reflects the life-to-date activity for these awards: Grant Year Group (1) Vesting Period in years Shares awarded Restrictions Lapsed and shares released to participants Shares Forfeited by participants (4) Shares Unvested Time Based Awards 2019 Associates (2) 3 - 5 212,211 276 9,815 202,120 Outside Director Awards (3) 2019 Outside directors 1 16,549 — — 16,549 (1) Groups include employees (referred to as associates above) and outside directors. When the restricted shares are awarded, a participant receives voting rights and forfeitable dividend rights with respect to the shares, but is not able to transfer the shares until the restrictions have lapsed. Once the restrictions lapse, the participant is taxed on the value of the award and may elect to sell some shares (or have Pinnacle Financial withhold some shares) to pay the applicable income taxes associated with the award. Alternatively, the recipient can pay the withholding taxes in cash. For time-based vesting restricted share awards, dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination. For performance-based vesting awards to Pinnacle Financial's directors, dividends are placed into escrow until the forfeiture restrictions on such shares lapse. (2) The forfeiture restrictions on these restricted share awards lapse in equal annual installments on the anniversary date of the grant. (3) Restricted share awards are issued to the outside members of the board of directors in accordance with their board compensation plan. Restrictions lapse on February 29, 2020 based on each individual board member meeting their attendance goals for the various board and board committee meetings to which each member was scheduled to attend. (4) These shares represent forfeitures resulting from recipients whose employment or board membership was terminated during the year-to-date period ended September 30, 2019 . Any dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination or will not be distributed from escrow, as applicable.
Summary of Restricted Share Unit awards	The following table details the restricted share unit awards (all of which are performance units) outstanding at September 30, 2019 : Units Awarded Grant year Named Executive Officers (NEOs) (1) Leadership Team other than NEOs Applicable Performance Periods associated with each tranche (fiscal year) Service period per tranche (in years) Subsequent holding period per tranche (in years) Period in which units to be settled into shares of common stock (2) 2019 166,211 - 249,343 52,244 2019 2 3 2024 2020 2 2 2024 2021 2 1 2024 2018 96,878 - 145,339 25,990 2018 2 3 2023 2019 2 2 2023 2020 2 1 2023 2017 72,537 - 109,339 24,916 2017 2 3 2022 2018 2 2 2022 2019 2 1 2022 2016 73,474 - 110,223 26,683 2016 2 3 2021 2017 2 2 2021 2018 2 1 2021 2015 58,200 - 101,850 28,378 2015 2 3 2020 2016 2 2 2020 2017 2 1 2020 (1) The named executive officers are awarded a range of awards that may be earned based on attainment of goals between a target level of performance and a maximum level of performance. (2) Restricted share unit awards granted in 2019, 2018, 2017, 2016 and 2015, if earned, will be settled in shares of Pinnacle Financial Common Stock in the periods noted in the table, if Pinnacle Bank's ratio of non-performing assets to its loans plus ORE is less than amounts established in the applicable award agreement.

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Interest Rate Swaps	A summary of Pinnacle Financial's interest rate swaps to facilitate customers' transactions as of September 30, 2019 and December 31, 2018 is included in the following table (in thousands): September 30, 2019 December 31, 2018 Balance Sheet Location Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Interest rate swap agreements: Assets Other assets $ 1,269,880 $ 56,846 $ 1,059,724 $ 22,273 Liabilities Other liabilities 1,269,880 (57,120 ) 1,059,724 (22,401 ) Total $ 2,539,760 $ (274 ) $ 2,119,448 $ (128 ) The effects of Pinnacle Financial's interest rate swaps to facilitate customers' transactions on the income statement during the three and nine months ended September 30, 2019 and 2018 were as follows (in thousands): Amount of Loss Recognized in Income Location of Loss Recognized in Income Three Months Ended September 30, Nine Months Ended 2019 2018 2019 2018 Interest rate swap agreements Other noninterest income $ (44 ) $ (8 ) $ (146 ) $ (42 )
Schedule of Derivative Instruments	Derivatives designated as cash flow hedges For derivative instruments that are designated and qualify as a cash flow hedge, the aggregate fair value of the derivative instrument is recorded in other assets or other liabilities with any gain or loss related to changes in fair value recorded in accumulated other comprehensive income, net of tax. The gain or loss is reclassified into earnings in the same period during which the hedged asset or liability affects earnings and is presented in the same income statement line item as the earnings effect of the hedged asset or liability. Pinnacle Financial uses forward cash flow hedges in an effort to manage future interest rate exposure on borrowings. The hedging strategy converts the LIBOR-based variable interest rate on forecasted borrowings to a fixed interest rate and is used in an effort to protect Pinnacle Financial from floating interest rate variability. During the second quarter of 2019, Pinnacle Financial purchased an interest rate floor to mitigate the impact of declining interest rates on LIBOR-based variable rate loans. A summary of Pinnacle Financial's cash flow hedge relationships as of September 30, 2019 and December 31, 2018 are as follows (in thousands): September 30, 2019 December 31, 2018 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Asset derivatives Interest rate floor Other assets 2.09 —% 2.75% minus 1 month LIBOR $ 1,300,000 $ 35,681 $ — $ — Liability derivatives Interest rate swaps Other liabilities 2.60 3.09% 3 month LIBOR $ 99,000 $ (3,886 ) $ 99,000 $ (1,757 ) The effects of Pinnacle Financial's cash flow hedge relationships on the statement of comprehensive income (loss) during the three and nine months ended September 30, 2019 and 2018 were as follows, net of tax (in thousands): Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss) Three Months Ended September 30, Nine Months Ended September 30, Asset derivatives 2019 2018 2019 2018 Interest rate floor - loans $ 1,951 $ — $ 9,875 $ — Liability derivatives Interest rate swaps - borrowings $ (69 ) $ 783 $ (1,572 ) $ 3,453 $ 1,882 $ 783 $ 8,303 $ 3,453 The cash flow hedges were determined to be highly effective during the periods presented and as a result qualify for hedge accounting treatment. The hedge would no longer be considered effective if a portion of the hedge becomes ineffective, the item hedged is no longer in existence or Pinnacle Financial discontinues hedge accounting. Pinnacle Financial expects the hedges to continue to be highly effective and qualify for hedge accounting during the remaining terms of the swaps. Losses totaling $1.1 million and $946,000 net of tax, respectively, were reclassified from accumulated other comprehensive income (loss) into net income during the three and nine months ended September 30, 2019 compared to gains of $145,000 and $429,000 net of tax, respectively, for the three and nine months ended September 30, 2018 . Approximately $908,000 in unrealized gains, net of tax, are expected to be reclassified from accumulated other comprehensive income (loss) into net income over the next twelve months related to previously terminated cash flow hedges. Derivatives designated as fair value hedges For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged asset or liability attributable to the hedged risk are recognized in current earnings. The gain or loss on the derivative instrument is presented on the same income statement line item as the earnings effect of the hedged item. Pinnacle Financial utilizes interest rate swaps designated as fair value hedges to mitigate the effect of changing interest rates on the fair values of fixed rate callable securities available-for-sale and fixed rate prepayable loans. The hedging strategy on securities converts the fixed interest rates to LIBOR-based variable interest rates. These derivatives are designated as partial term hedges of selected cash flows covering specified periods of time prior to the call dates of the hedged securities. A summary of Pinnacle Financial's fair value hedge relationships as of September 30, 2019 and December 31, 2018 are as follows (in thousands): September 30, 2019 December 31, 2018 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Liability derivatives Interest rate swap agreements - securities Other liabilities 7.29 3.08% 3 month LIBOR $ 477,905 $ (51,927 ) $ 477,905 $ (14,796 ) Interest rate swap agreements - loans Other liabilities — — — — — 900,000 (7,037 ) 7.29 3.08% $ 477,905 $ (51,927 ) $ 1,377,905 $ (21,833 ) The effects of Pinnacle Financial's fair value hedge relationships on the income statement during the three and nine months ended September 30, 2019 and 2018 were as follows (in thousands): Location of Gain (Loss) on Derivative Amount of Gain (Loss) Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Liability derivatives 2019 2018 2019 2018 Interest rate swaps - securities Interest income on securities $ (10,888 ) $ 1,755 $ (37,131 ) $ 1,991 Interest rate swaps - loans Interest income on loans $ — $ 2,236 $ (6,915 ) $ 3,358 Location of Gain (Loss) on Hedged Item Three Months Ended September 30, Nine Months Ended September 30, Liability derivatives - hedged items 2019 2018 2019 2018 Interest rate swaps - securities Interest income on securities $ 10,888 $ (1,755 ) $ 37,131 $ (1,991 ) Interest rate swaps - loans Interest income on loans $ — $ (2,236 ) $ 6,915 $ (3,358 ) The following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges at September 30, 2019 and December 31, 2018 (in thousands): Carrying Amount of the Hedged Assets Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets September 30, 2019 December 31, 2018 September 30, 2019 December 31, 2018 Line item on the balance sheet Securities available-for-sale $ 512,035 $ 515,063 $ 51,927 $ 14,796 Loans (1) $ — $ 907,037 $ — $ 7,037 (1) The carrying amount as shown represents the designated last-of-layer. At December 31, 2018, the total amortized cost basis of the closed portfolio of loans designated in these hedging relationships was $ 2.7 billion. During the second quarter of 2019, a fair value hedging relationship on loans was unwound resulting in a swap termination payment to the counterparty of approximately $14 .0 million. The corresponding loan fair value hedging adjustment of $14 .0 million as of the date of termination is being amortized over the remaining lives of the designated loans. During the three and nine months ended September 30, 2019 , amortization expense totaling $931,000 and $1.4 million, respectively, was recognized as a reduction to interest income on loans.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following tables present financial instruments measured at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 , by caption on the consolidated balance sheets and by FASB ASC 820 valuation hierarchy (as described above) (in thousands): Total carrying value in the consolidated balance sheet Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) September 30, 2019 Investment securities available-for-sale: U.S. Treasury securities $ 48,662 $ — $ 48,662 $ — U.S. government agency securities 92,246 — 92,246 — Mortgage-backed securities 1,334,517 — 1,334,517 — State and municipal securities 1,699,886 — 1,684,020 15,866 Agency-backed securities 162,733 — 162,733 — Corporate notes and other 55,391 — 55,391 — Total investment securities available-for-sale $ 3,393,435 $ — $ 3,377,569 $ 15,866 Other investments 59,195 — 25,247 33,948 Other assets 96,814 — 96,814 — Total assets at fair value $ 3,549,444 $ — $ 3,499,630 $ 49,814 Other liabilities $ 113,070 $ — $ 113,070 $ — Total liabilities at fair value $ 113,070 $ — $ 113,070 $ — December 31, 2018 Investment securities available-for-sale: U.S. Treasury securities $ 30,300 $ — $ 30,300 $ — U.S. government agency securities 70,159 — 70,159 — Mortgage-backed securities 1,310,945 — 1,310,945 — State and municipal securities 1,229,654 — 1,215,059 14,595 Agency-backed securities 375,582 — 375,582 — Corporate notes and other 67,046 — 67,046 — Total investment securities available-for-sale 3,083,686 — 3,069,091 14,595 Other investments 50,791 — 24,369 26,422 Other assets 24,524 — 24,524 — Total assets at fair value $ 3,159,001 $ — $ 3,117,984 $ 41,017 Other liabilities $ 46,550 $ — $ 46,550 $ — Total liabilities at fair value $ 46,550 $ — $ 46,550 $ —
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis	The following table presents assets measured at fair value on a nonrecurring basis as of September 30, 2019 and December 31, 2018 (in thousands): September 30, 2019 Total carrying value in the consolidated balance sheet Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) Other real estate owned $ 30,049 $ — $ — $ 30,049 Impaired loans, net (1) 41,141 — — 41,141 Total $ 71,190 $ — $ — $ 71,190 December 31, 2018 Other real estate owned $ 15,165 $ — $ — $ 15,165 Impaired loans, net (1) 40,830 — — 40,830 Total $ 55,995 $ — $ — $ 55,995 (1) Amount is net of valuation allowance of $3.6 million and $4.0 million at September 30, 2019 and December 31, 2018 , respectively, as required by ASC 310-10, "Receivables."
Rollforward of the Balance Sheet Amounts, Unobservable Input Reconciliation	The table below includes a rollforward of the balance sheet amounts for the three and nine months ended September 30, 2019 and September 30, 2018 (including the change in fair value) for financial instruments classified by Pinnacle Financial within Level 3 of the valuation hierarchy measured at fair value on a recurring basis including changes in fair value due in part to observable factors that are part of the valuation methodology (in thousands): For the Three months ended September 30, For the Nine months ended September 30, 2019 2018 2019 2018 Available-for-sale Securities Other Available-for-sale Securities Other Available-for-sale Securities Other assets Available-for-sale Securities Other assets Fair value, beginning of period $ 15,263 $ 31,522 $ 15,290 $ 23,578 $ 14,595 $ 26,422 $ 17,029 $ 28,874 Total realized gains included in income 29 1,264 30 81 87 2,193 90 2,858 Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at period-end 574 — 34 — 1,583 — (597 ) — Purchases — 1,777 — 2,455 — 6,965 — 7,273 Issuances — — — — — — — — Settlements — (615 ) — (932 ) (399 ) (1,632 ) (1,168 ) (1,657 ) Transfers out of Level 3 — — — — — — — (12,166 ) Fair value, end of period $ 15,866 $ 33,948 $ 15,354 $ 25,182 $ 15,866 $ 33,948 $ 15,354 $ 25,182 Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at period-end $ 29 $ 1,264 $ 30 $ 81 $ 87 $ 2,193 $ 90 $ 2,858
Carrying Amounts, Estimated Fair Value and Placement in the Fair Value Hierarchy of Financial Instruments	The following table presents the carrying amounts, estimated fair value and placement in the fair value hierarchy of Pinnacle Financial's financial instruments at September 30, 2019 and December 31, 2018 . This table excludes financial instruments for which the carrying amount approximates fair value. For short-term financial assets such as cash, cash equivalents, and restricted cash, the carrying amount is a reasonable estimate of fair value due to the relatively short time between the origination of the instrument and its expected realization. For financial liabilities such as non-interest bearing demand, interest-bearing demand, and savings deposits, the carrying amount is a reasonable estimate of fair value due to these products having no stated maturity (in thousands): September 30, 2019 Carrying/ Notional Amount Estimated Fair Value (1) Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) Financial assets: Securities held-to-maturity $ 189,684 $ 202,821 $ — $ 202,821 $ — Loans, net 19,251,995 19,216,128 — — 19,216,128 Consumer loans held-for-sale 73,042 74,161 — 74,161 — Commercial loans held-for-sale 21,312 21,638 — 21,638 — Financial liabilities: Deposits and securities sold under agreements to repurchase 20,096,079 19,442,956 — — 19,442,956 Federal Home Loan Bank advances 2,052,548 2,070,645 — — 2,070,645 Subordinated debt and other borrowings 750,488 713,051 — — 713,051 Off-balance sheet instruments: Commitments to extend credit (2) 7,797,246 1,067 — — 1,067 Standby letters of credit (3) 198,361 1,297 — — 1,297 December 31, 2018 Financial assets: Securities held-to-maturity $ 194,282 $ 193,131 $ — $ 193,131 $ — Loans, net 17,623,974 17,288,795 — — 17,288,795 Consumer loans held-for-sale 34,196 34,929 — 34,929 — Commercial loans held-for-sale 15,954 16,296 — 16,296 — Financial liabilities: Deposits and securities sold under agreements to repurchase 18,953,848 18,337,848 — — 18,337,848 Federal Home Loan Bank advances 1,443,589 1,432,003 — — 1,432,003 Subordinated debt and other borrowings 485,130 464,616 — — 464,616 Off-balance sheet instruments: Commitments to extend credit (2) 6,921,689 1,733 — — 1,733 Standby letters of credit (3) 177,475 1,131 — — 1,131 (1) Estimated fair values are consistent with an exit-price concept. The assumptions used to estimate the fair values are intended to approximate those that a market-participant would realize in a hypothetical orderly transaction. (2) At the end of each quarter, Pinnacle Financial evaluates the inherent risks of the outstanding off-balance sheet commitments. In making this evaluation, Pinnacle Financial evaluates the credit worthiness of the borrower, the collateral supporting the commitments and any other factors similar to those used to evaluate the inherent risks of our loan portfolio. Additionally, Pinnacle Financial evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at September 30, 2019 and December 31, 2018 , Pinnacle Financial included in other liabilities $2.4 million and $2.9 million, respectively, representing the inherent risks associated with these off-balance sheet commitments. (3) At September 30, 2019 and December 31, 2018 , the aggregate fair value of Pinnacle Financial's standby letters of credit was $1.3 million and $1.1 million, respectively. These amounts represent the unamortized fee associated with these standby letters of credit and are included in the consolidated balance sheets of Pinnacle Financial and are believed to approximate fair value. These fair values will decrease over time as the existing standby letters of credit approach their expiration dates.

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2019
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Summary of Regulatory Capital Requirement	The final rules implementing the Basel Committee on Banking Supervision's capital guidelines for U.S. banks (Basel III rules) became effective for Pinnacle Financial on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in on January 1, 2019. The minimum capital level requirements applicable to bank holding companies and banks subject to the rules are: (i) a common equity Tier 1 capital ratio of 4.5%; (ii) a Tier 1 risk-based capital ratio of 6%; (iii) a total risk-based capital ratio of 8%; and (iv) a Tier 1 leverage ratio of 4% for all institutions. The Basel III rules also established a capital conservation buffer of 2.5% (which was phased in over three years) above the regulatory minimum risk-based capital ratios. The capital conservation buffer was phased in beginning in January 2016 at 0.625% and increased each year by a like percentage until fully implemented in January 2019. Upon full implementation in January 2019, minimum risk-based capital ratios including the capital conservation buffer are: i) a common equity Tier 1 capital ratio of 7%, ii) a Tier 1 risk-based capital ratio of 8.5%, and iii) a total risk-based capital ratio of 10.5%. The net unrealized gain or loss on available-for-sale securities is not included in computing regulatory capital. Management believes, as of September 30, 2019 , that Pinnacle Financial and Pinnacle Bank met all capital adequacy requirements to which they are subject. To be categorized as well-capitalized under applicable banking regulations, Pinnacle Bank must maintain certain total risk-based, Tier 1 risk-based, common equity Tier 1 and Tier 1 leverage ratios as set forth in the following table and not be subject to a written agreement, order or directive to maintain a higher capital level. The capital conservation buffer is not included in the required ratios of the table presented below. Pinnacle Financial's and Pinnacle Bank's actual capital amounts and resulting ratios, not including the capital conservation buffer, are presented in the following table (in thousands): Actual Minimum Capital Requirement Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations Amount Ratio Amount Ratio Amount Ratio At September 30, 2019 Total capital to risk weighted assets: Pinnacle Financial $ 3,093,547 13.2 % $ 1,874,904 8.0 % NA NA Pinnacle Bank $ 2,818,988 12.1 % $ 1,869,627 8.0 % $ 2,337,034 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 2,238,535 9.6 % $ 1,406,178 6.0 % NA NA Pinnacle Bank $ 2,592,976 11.1 % $ 1,402,221 6.0 % $ 1,869,627 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 2,238,413 9.6 % $ 1,054,634 4.5 % NA NA Pinnacle Bank $ 2,592,854 11.1 % $ 1,051,665 4.5 % $ 1,519,072 6.5 % Tier 1 capital to average assets (*): Pinnacle Financial $ 2,238,535 8.9 % $ 1,003,329 4.0 % NA NA Pinnacle Bank $ 2,592,976 10.4 % $ 998,695 4.0 % $ 1,248,369 5.0 % Actual Minimum Capital Requirement Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations Amount Ratio Amount Ratio Amount Ratio At December 31, 2018 Total capital to risk weighted assets: Pinnacle Financial $ 2,580,143 12.2 % $ 1,691,017 8.0 % NA NA Pinnacle Bank $ 2,432,419 11.5 % $ 1,686,046 8.0 % $ 2,107,558 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 2,024,193 9.6 % $ 1,268,263 6.0 % NA NA Pinnacle Bank $ 2,218,003 10.5 % $ 1,264,535 6.0 % $ 1,686,046 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 2,024,070 9.6 % $ 951,197 4.5 % NA NA Pinnacle Bank $ 2,217,880 10.5 % $ 948,401 4.5 % $ 1,369,912 6.5 % Tier 1 capital to average assets (*): Pinnacle Financial $ 2,024,193 8.9 % $ 909,102 4.0 % NA NA Pinnacle Bank $ 2,218,003 9.8 % $ 906,185 4.0 % $ 1,132,731 5.0 % (*) Average assets for the above calculations were based on the most recent quarter.

Subordinated Debt and Other b_2

Subordinated Debt and Other borrowings (Tables)	9 Months Ended
	Sep. 30, 2019
Subordinated Debt [Abstract]
Schedule of Subordinated Debt and Other Borrowings	Pinnacle Financial has twelve wholly-owned subsidiaries that are statutory business trusts created for the exclusive purpose of issuing 30 -year capital trust preferred securities. Pinnacle Financial also has a $75 .0 million revolving credit facility, of which it had no outstanding borrowings as of September 30, 2019 . Additionally, Pinnacle Financial and Pinnacle Bank have entered into, or assumed in connection with acquisitions, certain other subordinated debt agreements as outlined below as of September 30, 2019 (in thousands): Name Date Maturity Total Debt Outstanding Interest Rate at Coupon Structure Trust preferred securities Pinnacle Statutory Trust I December 29, 2003 December 30, 2033 $ 10,310 4.94 % 30-day LIBOR + 2.80% Pinnacle Statutory Trust II September 15, 2005 September 30, 2035 20,619 3.50 % 30-day LIBOR + 1.40% Pinnacle Statutory Trust III September 7, 2006 September 30, 2036 20,619 3.75 % 30-day LIBOR + 1.65% Pinnacle Statutory Trust IV October 31, 2007 September 30, 2037 30,928 4.97 % 30-day LIBOR + 2.85% BNC Capital Trust I April 3, 2003 April 15, 2033 5,155 5.55 % 30-day LIBOR + 3.25% BNC Capital Trust II March 11, 2004 April 7, 2034 6,186 5.15 % 30-day LIBOR + 2.85% BNC Capital Trust III September 23, 2004 September 23, 2034 5,155 4.70 % 30-day LIBOR + 2.40% Name Date Maturity Total Debt Outstanding Interest Rate at Coupon Structure BNC Capital Trust IV September 27, 2006 December 31, 2036 7,217 3.80 % 30-day LIBOR + 1.70% Valley Financial Trust I June 26, 2003 June 26, 2033 4,124 5.21 % 30-day LIBOR + 3.10% Valley Financial Trust II September 26, 2005 December 15, 2035 7,217 3.61 % 30-day LIBOR + 1.49% Valley Financial Trust III December 15, 2006 January 30, 2037 5,155 4.00 % 30-day LIBOR + 1.73% Southcoast Capital Trust III August 5, 2005 September 30, 2035 10,310 3.60 % 30-day LIBOR + 1.50% Subordinated Debt Pinnacle Bank Subordinated Notes July 30, 2015 July 30, 2025 60,000 4.88 % Fixed (1) Pinnacle Bank Subordinated Notes March 10, 2016 July 30, 2025 70,000 4.88 % Fixed (1) Avenue Subordinated Notes December 29, 2014 December 29, 2024 20,000 6.75 % Fixed (2) Pinnacle Financial Subordinated Notes November 16, 2016 November 16, 2026 120,000 5.25 % Fixed (3) Pinnacle Financial Subordinated Notes September 11, 2019 September 15, 2029 300,000 4.13 % Fixed (4) BNC Subordinated Notes September 25, 2014 October 1, 2024 60,000 5.50 % Fixed (5) Other Borrowings Revolving credit facility (6) April 25, 2019 April 24, 2020 — 3.94 % 30-day LIBOR + 1.50% Debt issuance costs and fair value adjustments (12,507 ) Total subordinated debt and other borrowings $ 750,488 (1) Migrates to three month LIBOR + 3.128% beginning July 30, 2020 through the end of the term. (2) Migrates to three month LIBOR + 4.95% beginning January 1, 2020 through the end of the term. (3) Migrates to three month LIBOR + 3.884% beginning November 16, 2021 through the end of the term. (4) Migrates to three month LIBOR + 2.775% beginning September 15, 2024 through the end of the term. (5) Migrates to three month LIBOR + 3.59% beginning October 1, 2019 through the end of the term if not redeemed on that date. (6) Borrowing capacity on the revolving credit facility is $75 .0 million. At September 30, 2019 , there were no amounts outstanding under this facility. An unused fee of 0.30% is assessed on the average daily unused amount of the loan. On September 11, 2019, Pinnacle Financial issued $300.0 million aggregate principal amount of 4.13% Fixed-to-Floating Rate Subordinated Notes due 2029 (the 2029 Notes) in a public offering. From, and including, the date of issuance to, but excluding, September 15, 2024, the 2029 Notes will bear interest at an initial fixed rate of 4.13% per annum, payable semi-annually in arrears on March 15 and September 15, commencing on March 15, 2020. Thereafter, from September 15, 2024 through the maturity date, September 15, 2029 , or earlier redemption date, the 2029 Notes will bear interest at a floating rate equal to the then-current three month LIBOR, plus 277.5 basis points for each quarterly interest period (subject to certain provisions regarding use of an alternative base rate upon certain LIBOR transition events), payable quarterly in arrears on March 15, June 15, September 15 and December 15 of each year, commencing on September 15, 2024. The offering and sale of the 2029 Notes yielded net proceeds of approximately $296.5 million after deducting the underwriting discount and offering expenses payable by Pinnacle Financial. Pinnacle Financial used approximately $8.8 million of such proceeds to redeem the previously outstanding Subordinated Note due October 15, 2023, which Pinnacle Financial assumed in the BNC merger and which carried an interest rate of 7.23% at the time of such redemption. Pinnacle Financial intends to use approximately $210.0 million of the net proceeds of this offering to redeem certain other of its and Pinnacle Bank’s subordinated notes, including the $20.0 million aggregate principal amount of Avenue subordinated notes and $60.0 million aggregate principal amount of BNC subordinated notes, each listed in the table above. Pinnacle Financial also presently intends to redeem the $130.0 million aggregate principal amount of subordinated notes issued by Pinnacle Bank listed in the table above after such notes become eligible for redemption on July 30, 2020. The redemption of the $130.0 million aggregate principal amount of subordinated notes issued by Pinnacle Bank is subject to receipt of all regulatory permissions for such redemption, which Pinnacle Financial has not yet sought, and Pinnacle Financial’s ultimate determination to redeem such notes after they become eligible for redemption. Pinnacle Bank is under no obligation to redeem its subordinated notes. Pinnacle Financial intends to use the remainder of the net proceeds from the offering of the 2029 Notes for general corporate purposes, including providing capital to support the growth of Pinnacle Bank and Pinnacle Financial’s business.

Leases Leases (Tables)

Leases Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Schedule of Lease Assets and Liabilities	Right-of-use assets and lease liabilities related to Pinnacle Financial's operating and finance leases are as follows at September 30, 2019 (in thousands): Balance Sheet Location September 30, 2019 Right-of-use assets Operating leases (1) Other assets $ 74,151 Finance leases Premises and equipment, net 2,044 Total right-of-use assets $ 76,195 Lease liabilities Operating leases Other liabilities $ 82,150 Finance leases Other liabilities 3,302 Total lease liabilities $ 85,452 (1) Presented net of tenant improvement allowances of $1.7 million and purchase accounting fair value adjustments of $2.8 million .
Schedule of Lease Costs and Other Information	Lease costs during the three and nine months ended September 30, 2019 related to these leases were as follows (in thousands): Three Months Ended Nine Months Ended Operating lease cost $ 3,516 $ 10,488 Short-term lease cost 43 137 Finance lease cost: Interest on lease liabilities 60 183 Amortization of right-of-use asset 56 169 Sublease income (562 ) (1,123 ) Net lease cost $ 3,113 $ 9,854 Rent expense related to leases during the three and nine months ended September 30, 2018 was $3.1 million and $9.4 million , respectively. Cash flows related to leases during the three and nine months ended September 30, 2019 were as follows (in thousands): Three Months Ended Nine Months Ended Operating cash flows related to operating leases $ 3,432 $ 10,193 Operating cash flows related to finance leases 60 183 Financing cash flows related to finance leases 57 168 Lease liabilities are determined based on lease term discounted at an effective rate of interest. Certain lease agreements contain renewal options which are considered in the determination of the lease term if they are deemed reasonably certain to be exercised. Discount rates used to determine the present value of lease payments are based on secured borrowing rates as of the commencement date of the lease. The following table presents the weighted average remaining lease term and weighted average discount rate used to determine lease liabilities at September 30, 2019 (in thousands): September 30, 2019 Weighted average remaining lease term: Operating leases 10.41 years Finance leases 9.09 years Weighted average discount rate: Operating leases 3.28 % Finance leases 7.22 %
Schedule of Future Minimum Operating Lease Payments	The following table presents a maturity analysis of undiscounted cash flows due under operating leases and finance leases and a reconciliation to total operating lease liabilities and finance lease liabilities at September 30, 2019 (in thousands): Operating Leases Finance Leases 2019 (1) $ 3,403 $ 118 2020 12,992 470 2021 12,383 470 2022 10,619 470 2023 9,768 479 Thereafter 50,329 2,548 99,494 4,555 Less: Imputed interest (17,344 ) (1,253 ) Total lease liabilities $ 82,150 $ 3,302 (1) Includes the period from October 1, 2019 through December 31, 2019. At December 31, 2018, the future minimum lease payments due under operating leases and capital leases, and a reconciliation to total capital lease liabilities were as follows (in thousands): Operating Leases Capital Leases 2019 $ 12,889 $ 470 2020 11,805 470 2021 11,527 470 2022 9,410 470 2023 8,820 479 Thereafter 43,730 2,548 Future minimum lease payments $ 98,181 4,907 Less: Imputed interest (1,437 ) Total capital lease liabilities $ 3,470
Schedule of Future Minimum Finance Lease Payments	The following table presents a maturity analysis of undiscounted cash flows due under operating leases and finance leases and a reconciliation to total operating lease liabilities and finance lease liabilities at September 30, 2019 (in thousands): Operating Leases Finance Leases 2019 (1) $ 3,403 $ 118 2020 12,992 470 2021 12,383 470 2022 10,619 470 2023 9,768 479 Thereafter 50,329 2,548 99,494 4,555 Less: Imputed interest (17,344 ) (1,253 ) Total lease liabilities $ 82,150 $ 3,302 (1) Includes the period from October 1, 2019 through December 31, 2019. At December 31, 2018, the future minimum lease payments due under operating leases and capital leases, and a reconciliation to total capital lease liabilities were as follows (in thousands): Operating Leases Capital Leases 2019 $ 12,889 $ 470 2020 11,805 470 2021 11,527 470 2022 9,410 470 2023 8,820 479 Thereafter 43,730 2,548 Future minimum lease payments $ 98,181 4,907 Less: Imputed interest (1,437 ) Total capital lease liabilities $ 3,470

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details)	Jul. 02, 2019USD ($)	Sep. 30, 2019market
Accounting Policies [Abstract]
Number of markets entity operates | market		11
Bankers Healthcare Group, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (as percent)		49.00%
Advocate Capital, Inc. [Member]
Business Acquisition [Line Items]
Acquisition, cash price	$ 59,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets	34,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	$ 134,300,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Jan. 01, 2019
Cash Transactions:
Interest paid			$ 216,261	$ 136,154
Income taxes paid, net			61,238	55,525
Noncash Transactions:
Loans charged-off to the allowance for loan losses	$ 6,780	$ 6,949	21,328	22,316
Loans foreclosed upon and transferred to other real estate owned			16,870	2,066
Loans foreclosed upon and transferred to other assets			93	1,580
Other Real Estate Sales Financed			0	276
Fixed assets transferred to other real estate owned			5,126	0
Available-for-sale securities transferred to Held-to-Maturity			0	179,763	$ 179,800
Transfer of Loans Held-for-sale to Portfolio Loans			0	44,980
Right of use assets recognized during the period			$ 82,856	$ 0
Accounting Standards Update 2016-02
Noncash Transactions:
Recognized upon initial adoption of ASU						$ 79,900

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Basic and Diluted Net Income Per Share Calculations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic net income per share calculation:
Numerator - Net income	$ 110,521	$ 93,747	$ 304,802	$ 264,122
Denominator - Weighted average common shares outstanding (in shares)	76,301,010	77,145,023	76,480,757	77,116,377
Basic net income per common share (in dollars per share)	$ 1.45	$ 1.22	$ 3.99	$ 3.42
Diluted net income per share calculation:
Numerator – Net income	$ 110,521	$ 93,747	$ 304,802	$ 264,122
Denominator - Weighted average common shares outstanding (in shares)	76,301,000	77,145,000	76,481,000	77,116,000
Dilutive shares contingently issuable (in shares)	255,000	346,000	280,000	326,000
Weighted average diluted common shares outstanding (in shares)	76,556,309	77,490,977	76,761,167	77,442,554
Diluted net income per common share (in dollars per share)	$ 1.44	$ 1.21	$ 3.97	$ 3.41

Equity method investment - Fina

Equity method investment - Financial Position and Results of Operations (Details) - Bankers Healthcare Group, LLC - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Assets	$ 695,300		$ 695,300		$ 459,816
Liabilities	499,460		499,460		324,211
Equity interests	195,840		195,840		135,605
Total liabilities and equity	695,300		695,300		$ 459,816
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Revenues	108,770	$ 59,133	279,569	$ 151,937
Net income	$ 61,364	$ 30,933	$ 156,064	$ 69,039

Equity method investment - Narr

Equity method investment - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]
Technology, trade name and customer relationship intangibles	$ 39,349,000		$ 39,349,000		$ 46,161,000
Amortization of Intangible Assets	2,430,000	$ 2,616,000	7,012,000	$ 7,973,000
Dividends received from equity method investment			49,940,000	33,651,000
Bankers Healthcare Group, LLC
Schedule of Equity Method Investments [Line Items]
Technology, trade name and customer relationship intangibles	9,200,000		9,200,000		$ 10,700,000
Amortization of Intangible Assets	475,000	693,000	1,400,000	2,100,000
Accretion income	630,000	719,000	2,000,000	2,200,000
Dividends received from equity method investment	9,000,000	$ 10,200,000	49,900,000	$ 33,700,000
Loan face amount	$ 0		$ 0			$ 0

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Securities available-for-sale [Abstract]
Amortized Cost		$ 3,337,991		$ 3,146,023
Gross Unrealized Gains		75,677		5,275
Gross Unrealized Losses		20,233		67,612
Securities available-for-sale, at fair value		3,393,435		3,083,686
Available-for-sale, Amortized Cost [Abstract]
Due in one year or less		63,488
Due in one year to five years		16,772
Due in five years to ten years		106,774
Due after ten years		1,668,670
Mortgage-backed securities		1,318,953
Asset-backed securities		163,334
Amortized Cost		3,337,991
Available-for-sale, Fair Value [Abstract]
Due in one year or less		63,507
Due in one year to five years		16,986
Due in five years to ten years		107,322
Due after ten years		1,708,370
Mortgage-backed securities		1,334,517
Asset-backed securities		162,733
Securities available-for-sale, at fair value		3,393,435		3,083,686
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale securities transferred to Held-to-Maturity		0	$ 179,763	179,800
Net unrealized after tax loss	$ 2,200
Securities held-to-maturity [Abstract]
Amortized Cost		189,684		194,282
Gross Unrealized Gains		13,137		152
Gross Unrealized Losses		0		1,303
Securities held-to-maturity, fair value		202,821		193,131
Held-to-maturity, Amortized Cost [Abstract]
Due in one year or less		1,394
Due in one year to five years		0
Due in five years to ten years		5,775
Due after ten years		182,515
Mortgage-backed securities		0
Asset-backed securities		0
Amortized Cost		189,684		194,282
Held-to-maturity, Fair Value [Abstract]
Due in one year or less		1,394
Due in one year to five years		0
Due in five years to ten years		5,877
Due after ten years		195,550
Mortgage-backed securities		0
Asset-backed securities		0
Fair Value		202,821		193,131
U.S. Treasury securities
Securities available-for-sale [Abstract]
Amortized Cost		48,635		30,325
Gross Unrealized Gains		31		0
Gross Unrealized Losses		4		25
Securities available-for-sale, at fair value		48,662		30,300
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value		48,662		30,300
U.S. government agency securities
Securities available-for-sale [Abstract]
Amortized Cost		92,668		71,456
Gross Unrealized Gains		412		49
Gross Unrealized Losses		834		1,346
Securities available-for-sale, at fair value		92,246		70,159
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value		92,246		70,159
Mortgage-backed securities
Securities available-for-sale [Abstract]
Amortized Cost		1,318,953		1,336,469
Gross Unrealized Gains		19,229		3,110
Gross Unrealized Losses		3,665		28,634
Securities available-for-sale, at fair value		1,334,517		1,310,945
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value		1,334,517		1,310,945
State and municipal securities
Securities available-for-sale [Abstract]
Amortized Cost		1,658,734		1,259,267
Gross Unrealized Gains		54,839		1,126
Gross Unrealized Losses		13,687		30,739
Securities available-for-sale, at fair value		1,699,886		1,229,654
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value		1,699,886		1,229,654
Asset-backed securities
Securities available-for-sale [Abstract]
Amortized Cost		163,334		379,107
Gross Unrealized Gains		601		820
Gross Unrealized Losses		1,202		4,345
Securities available-for-sale, at fair value		162,733		375,582
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value		162,733		375,582
Corporate notes and other
Securities available-for-sale [Abstract]
Amortized Cost		55,667		69,399
Gross Unrealized Gains		565		170
Gross Unrealized Losses		841		2,523
Securities available-for-sale, at fair value		55,391		67,046
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value		55,391		67,046
State and municipal securities
Securities held-to-maturity [Abstract]
Amortized Cost		189,684		194,282
Gross Unrealized Gains		13,137		152
Gross Unrealized Losses		0		1,303
Securities held-to-maturity, fair value		202,821		193,131
Held-to-maturity, Amortized Cost [Abstract]
Amortized Cost		189,684		194,282
Held-to-maturity, Fair Value [Abstract]
Fair Value		$ 202,821		$ 193,131

Securities- Unrealized Losses (

Securities- Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	$ 428,261	$ 1,586,756
Investments with an unrealized loss of less than 12 months, unrealized losses	3,217	38,920
Investments with an unrealized loss of 12 months or longer, fair value	696,427	1,161,369
Investments with an unrealized loss of 12 months or longer, unrealized losses	17,016	32,811
Total investments with an unrealized loss, fair value	1,124,688	2,748,125
Total investments with an unrealized loss, unrealized losses	20,233	71,731
U.S. Treasury securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	9,622	30,054
Investments with an unrealized loss of less than 12 months, unrealized losses	4	22
Investments with an unrealized loss of 12 months or longer, fair value	0	246
Investments with an unrealized loss of 12 months or longer, unrealized losses	0	3
Total investments with an unrealized loss, fair value	9,622	30,300
Total investments with an unrealized loss, unrealized losses	4	25
U.S. government agency securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	2,942	13,697
Investments with an unrealized loss of less than 12 months, unrealized losses	5	328
Investments with an unrealized loss of 12 months or longer, fair value	33,247	42,539
Investments with an unrealized loss of 12 months or longer, unrealized losses	829	1,018
Total investments with an unrealized loss, fair value	36,189	56,236
Total investments with an unrealized loss, unrealized losses	834	1,346
Mortgage-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	116,784	203,299
Investments with an unrealized loss of less than 12 months, unrealized losses	515	2,134
Investments with an unrealized loss of 12 months or longer, fair value	210,395	882,231
Investments with an unrealized loss of 12 months or longer, unrealized losses	3,150	26,500
Total investments with an unrealized loss, fair value	327,179	1,085,530
Total investments with an unrealized loss, unrealized losses	3,665	28,634
State and municipal securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	214,033	1,044,757
Investments with an unrealized loss of less than 12 months, unrealized losses	1,874	30,780
Investments with an unrealized loss of 12 months or longer, fair value	383,023	198,610
Investments with an unrealized loss of 12 months or longer, unrealized losses	11,813	4,078
Total investments with an unrealized loss, fair value	597,056	1,243,367
Total investments with an unrealized loss, unrealized losses	13,687	34,858
Asset-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	69,921	268,677
Investments with an unrealized loss of less than 12 months, unrealized losses	699	4,118
Investments with an unrealized loss of 12 months or longer, fair value	57,709	11,828
Investments with an unrealized loss of 12 months or longer, unrealized losses	503	227
Total investments with an unrealized loss, fair value	127,630	280,505
Total investments with an unrealized loss, unrealized losses	1,202	4,345
Corporate notes
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	14,959	26,272
Investments with an unrealized loss of less than 12 months, unrealized losses	120	1,538
Investments with an unrealized loss of 12 months or longer, fair value	12,053	25,915
Investments with an unrealized loss of 12 months or longer, unrealized losses	721	985
Total investments with an unrealized loss, fair value	27,012	52,187
Total investments with an unrealized loss, unrealized losses	$ 841	$ 2,523

Securities Securities - Narrati

Securities Securities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Securities pledged as collateral to secure public funds and other deposits or securities sold under agreements to repurchase	$ 1,200,000		$ 1,200,000
Secured borrowing under agreement to repurchase	95,400		95,400
Accumulated unrealized losses	20,233		20,233		$ 71,731
Fair value of securities	1,124,688		1,124,688		2,748,125
Debt Securities Available-for-sale Sold Amount	149,400		626,100
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	308	$ 8	(4,438)	$ 30
Available-for-sale securities transferred to Held-to-Maturity			0	$ 179,763	$ 179,800
Securities pledged as collateral
Debt Securities, Available-for-sale [Line Items]
Secured borrowing under agreement to repurchase	$ 95,400		$ 95,400

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses Loans and Allowance for Loan Losses - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of contracts			0	0
Percentage of loan portfolio as commercial loan	79.50%		79.50%
Risk rated loans	$ 1,000,000		$ 1,000,000
Average balance of impaired loans	73,649,000	$ 82,346,000	81,612,000	$ 73,284,000
Cash payments received on nonaccrual loans	0	84,000	176,000	337,000
Nonaccrual loans	1,300,000	1,100,000	3,500,000	2,800,000
Loan losses, allowance	93,647,000		93,647,000		$ 83,575,000
Troubled debt restructurings performing as of restructure date	$ 5,800,000		$ 5,800,000		5,900,000
Percentage of credit exposure to risk based capital	25.00%		25.00%
Loans and other extensions of credit granted to directors, executive officers, and their related entities	$ 10,700,000		$ 10,700,000		37,900,000
Amount drawn from loans and other extensions of credit granted	6,600,000		6,600,000		18,300,000
Commercial loans held-for-sale	21,312,000		21,312,000		15,954,000
Mortgage loans held-for-sale	54,300,000		54,300,000		$ 31,800,000
Loans sold			788,100,000	917,900,000
Gain on mortgage loans sold, net	$ 7,400,000	$ 3,900,000	$ 18,300,000	$ 11,400,000
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of credit exposure to risk based capital	79.90%		79.90%		85.20%
Non-owner occupied commercial real estate and multifamily loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of credit exposure to risk based capital	272.80%		272.80%		277.70%
Troubled Debt Restructurings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan losses, allowance	$ 0		$ 0		$ 0

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses - Loan Classification by Risk Rating Category (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		$ 19,345,642	$ 17,707,549
Potential problem loans not included in nonperforming assets		254,000	176,300
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		18,820,735	17,346,673
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		194,127	93,163
Substandard-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	[1]	257,517	179,879
Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		73,263	87,834
Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		0	0
Commercial real estate - mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		7,709,245	7,164,954
Commercial real estate - mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		7,478,442	6,998,485
Commercial real estate - mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		89,057	55,932
Commercial real estate - mortgage | Substandard-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	[1]	119,155	78,202
Commercial real estate - mortgage | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		22,591	32,335
Commercial real estate - mortgage | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		0	0
Consumer real estate - mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		3,025,502	2,844,447
Consumer real estate - mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		2,983,694	2,787,570
Consumer real estate - mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		5,771	7,902
Consumer real estate - mortgage | Substandard-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	[1]	12,948	20,906
Consumer real estate - mortgage | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		23,089	28,069
Consumer real estate - mortgage | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		0	0
Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		2,253,303	2,072,455
Construction and land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		2,244,217	2,059,376
Construction and land development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		2,846	4,334
Construction and land development | Substandard-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	[1]	4,193	5,358
Construction and land development | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		2,047	3,387
Construction and land development | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		0	0
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		5,891,038	5,271,421
Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		5,648,775	5,148,726
Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		95,743	24,284
Commercial and industrial | Substandard-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	[1]	121,160	75,351
Commercial and industrial | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		25,360	23,060
Commercial and industrial | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		0	0
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		466,554	354,272
Consumer and other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		465,607	352,516
Consumer and other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		710	711
Consumer and other | Substandard-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	[1]	61	62
Consumer and other | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		176	983
Consumer and other | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		$ 0	$ 0
[1]	Potential problem loans represent those loans with a well-defined weakness and where information about possible credit problems of borrowers has caused management to have doubts about the borrower's ability to comply with present repayment terms. This definition is believed to be substantially consistent with the standards established by Pinnacle Bank's primary regulators for loans classified as substandard, excluding troubled debt restructurings. Potential problem loans, which are not included in nonaccrual loans, amounted to approximately $254.0 million at September 30, 2019 , compared to $176.3 million at December 31, 2018

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses - Rollforward of Purchase Credit Impaired Loans (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Gross Carrying Value
Gross carrying value, beginning balance	$ 42,837
Acquisitions	1,883
Business Combination Acquired Receivable Gross Contractual Transfer	0
Year-to-date settlements	12,020
Gross carrying value, ending balance	32,700
Accretable Yield
Accretable yield, beginning balance	(114)
Acquired Accretable Yield	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications (to) from Nonaccretable Difference	(7,505)
Year-to-date settlements	1,451
Accretable yield, ending balance	(6,168)
Nonaccretable Yield
Nonaccretable yield, beginning balance	(17,394)
Acquired Nonaccretable Yield	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	7,505
Year-to-date settlements	4,229
Nonaccretable yield, ending balance	(5,660)
Net Carrying Value
Net carrying value, beginning balance	25,329
Acquisitions	1,883
Business Combination Acquired Receivable Net Contractual Transfer	0
Year-to-date settlements	6,340
Net carrying value, ending balance	$ 20,872

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses - Recorded Investment, Principal Balance and Related Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 70,982		$ 70,982		$ 83,146
Unpaid principal balances	71,084		71,084		83,337
Valuation allowance	3,608		3,608		3,964
Average recorded investment	73,649	$ 82,346	81,612	$ 73,284
Interest income recognized	0	84	176	337
Impaired loans with an allowance:
Financing Receivable, Impaired [Line Items]
Recorded investment	44,749		44,749		44,794
Unpaid principal balances	44,851		44,851		44,914
Valuation allowance	3,608		3,608		3,964
Average recorded investment	44,265	37,168	46,633	32,070
Interest income recognized	0	0	0	0
Impaired loans with an allowance: | Commercial real estate - mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	13,462		13,462		14,114
Unpaid principal balances	13,472		13,472		14,124
Valuation allowance	1,021		1,021		724
Average recorded investment	13,050	13,474	14,689	9,297
Interest income recognized	0	0	0	0
Impaired loans with an allowance: | Consumer real estate - mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	19,245		19,245		19,864
Unpaid principal balances	19,368		19,368		19,991
Valuation allowance	1,065		1,065		1,443
Average recorded investment	19,508	14,162	20,887	11,476
Interest income recognized	0	0	0	0
Impaired loans with an allowance: | Construction and land development
Financing Receivable, Impaired [Line Items]
Recorded investment	275		275		581
Unpaid principal balances	271		271		579
Valuation allowance	15		15		28
Average recorded investment	451	1,150	587	1,301
Interest income recognized	0	0	0	0
Impaired loans with an allowance: | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded investment	11,591		11,591		9,252
Unpaid principal balances	11,566		11,566		9,215
Valuation allowance	1,497		1,497		1,441
Average recorded investment	11,113	7,470	10,070	9,345
Interest income recognized	0	0	0	0
Impaired loans with an allowance: | Consumer and other
Financing Receivable, Impaired [Line Items]
Recorded investment	176		176		983
Unpaid principal balances	174		174		1,005
Valuation allowance	10		10		328
Average recorded investment	143	912	400	651
Interest income recognized	0	0	0	0
Impaired loans without an allowance:
Financing Receivable, Impaired [Line Items]
Recorded investment	26,233		26,233		38,352
Unpaid principal balances	26,233		26,233		38,423
Valuation allowance	0		0		0
Average recorded investment	29,384	45,178	34,979	41,214
Interest income recognized	0	84	176	337
Impaired loans without an allowance: | Commercial real estate - mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	8,356		8,356		14,724
Unpaid principal balances	8,366		8,366		14,739
Valuation allowance	0		0		0
Average recorded investment	9,344	22,029	12,521	18,702
Interest income recognized	0	84	176	337
Impaired loans without an allowance: | Consumer real estate - mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	4,960		4,960		7,247
Unpaid principal balances	4,958		4,958		7,271
Valuation allowance	0		0		0
Average recorded investment	7,922	5,699	8,381	5,034
Interest income recognized	0	0	0	0
Impaired loans without an allowance: | Construction and land development
Financing Receivable, Impaired [Line Items]
Recorded investment	20		20		1,786
Unpaid principal balances	19		19		1,786
Valuation allowance	0		0		0
Average recorded investment	10	1,442	452	1,382
Interest income recognized	0	0	0	0
Impaired loans without an allowance: | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded investment	12,897		12,897		14,595
Unpaid principal balances	12,890		12,890		14,627
Valuation allowance	0		0		0
Average recorded investment	12,108	16,008	13,625	16,096
Interest income recognized	0	0	0	0
Impaired loans without an allowance: | Consumer and other
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0		0
Unpaid principal balances	0		0		0
Valuation allowance	0		0		$ 0
Average recorded investment	0	0	0	0
Interest income recognized	$ 0	$ 0	$ 0	$ 0

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses Loans and Allowance for Loan Losses, Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts			0	0
Number of contracts	1	2	4	3
Pre Modification Outstanding Recorded Investment	$ 314	$ 517	$ 2,444	$ 554
Post Modification Outstanding Recorded Investment, net of related allowance	$ 297	$ 517	$ 1,738	$ 554
Commercial real estate - mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	1	0	1	0
Pre Modification Outstanding Recorded Investment	$ 314	$ 0	$ 314	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	$ 297	$ 0	$ 297	$ 0
Consumer real estate - mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	1	1	2
Pre Modification Outstanding Recorded Investment	$ 0	$ 169	$ 712	$ 206
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 169	$ 626	$ 206
Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	1	1	1
Pre Modification Outstanding Recorded Investment	$ 0	$ 348	$ 21	$ 348
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 348	$ 19	$ 348
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	0	1	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0	$ 1,397	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 0	$ 796	$ 0
Consumer and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	0	0	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 0	$ 0	$ 0

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses - Industry Classification System (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Lessors of nonresidential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	$ 3,502,181
Unfunded Commitments	826,157
Total exposure	4,328,338	$ 3,932,059
Lessors of residential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	1,003,401
Unfunded Commitments	549,949
Total exposure	1,553,350	1,484,697
Hotels (except for Casino Hotels) and Motels
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	806,089
Unfunded Commitments	167,696
Total exposure	973,785	920,001
236117 New Housing Operative Builders [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	516,646
Unfunded Commitments	580,917
Total exposure	$ 1,097,563	$ 1,100,989

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses - Financing Receivables Past Due (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Loans		$ 19,345,642	$ 17,707,549
Nonaccrual loans	[1]	65,278	77,248
Currently performing impaired loans		33,500	52,500
Purchased credit impaired, accruing
Financing Receivable, Past Due [Line Items]
Loans		12,887	14,743
Purchased credit impaired, nonaccruing
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	[1]	7,985	10,586
Past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		45,590	59,859
30-89 days past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		43,140	58,301
90 days or more past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		2,450	1,558
Current and Accruing
Financing Receivable, Past Due [Line Items]
Loans		19,213,902	17,545,113
Commercial real estate - mortgage
Financing Receivable, Past Due [Line Items]
Loans		7,709,245	7,164,954
Commercial real estate - mortgage | Owner-occupied
Financing Receivable, Past Due [Line Items]
Loans		2,595,837	2,653,433
Nonaccrual loans	[1]	11,011	16,025
Commercial real estate - mortgage | Owner-occupied | Purchased credit impaired, accruing
Financing Receivable, Past Due [Line Items]
Loans		2,903	2,664
Commercial real estate - mortgage | Owner-occupied | Purchased credit impaired, nonaccruing
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	[1]	897	874
Commercial real estate - mortgage | Owner-occupied | Past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		6,398	10,170
Commercial real estate - mortgage | Owner-occupied | 30-89 days past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		6,398	10,170
Commercial real estate - mortgage | Owner-occupied | 90 days or more past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		0	0
Commercial real estate - mortgage | Owner-occupied | Current and Accruing
Financing Receivable, Past Due [Line Items]
Loans		2,574,628	2,623,700
Commercial real estate - mortgage | All other
Financing Receivable, Past Due [Line Items]
Loans		5,113,408	4,511,521
Nonaccrual loans	[1]	10,640	12,634
Commercial real estate - mortgage | All other | Purchased credit impaired, accruing
Financing Receivable, Past Due [Line Items]
Loans		5,169	5,659
Commercial real estate - mortgage | All other | Purchased credit impaired, nonaccruing
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	[1]	43	2,802
Commercial real estate - mortgage | All other | Past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		5,896	1,586
Commercial real estate - mortgage | All other | 30-89 days past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		5,896	1,586
Commercial real estate - mortgage | All other | 90 days or more past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		0	0
Commercial real estate - mortgage | All other | Current and Accruing
Financing Receivable, Past Due [Line Items]
Loans		5,091,660	4,488,840
Consumer real estate - mortgage
Financing Receivable, Past Due [Line Items]
Loans		3,025,502	2,844,447
Nonaccrual loans	[1]	19,245	22,564
Consumer real estate - mortgage | Purchased credit impaired, accruing
Financing Receivable, Past Due [Line Items]
Loans		3,216	3,689
Consumer real estate - mortgage | Purchased credit impaired, nonaccruing
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	[1]	3,844	5,505
Consumer real estate - mortgage | Past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		9,824	18,059
Consumer real estate - mortgage | 30-89 days past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		9,051	18,059
Consumer real estate - mortgage | 90 days or more past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		773	0
Consumer real estate - mortgage | Current and Accruing
Financing Receivable, Past Due [Line Items]
Loans		2,989,373	2,794,630
Construction and land development
Financing Receivable, Past Due [Line Items]
Loans		2,253,303	2,072,455
Nonaccrual loans	[1]	275	2,020
Construction and land development | Purchased credit impaired, accruing
Financing Receivable, Past Due [Line Items]
Loans		1,274	2,108
Construction and land development | Purchased credit impaired, nonaccruing
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	[1]	1,772	1,367
Construction and land development | Past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		2,005	3,759
Construction and land development | 30-89 days past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		2,005	3,759
Construction and land development | 90 days or more past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		0	0
Construction and land development | Current and Accruing
Financing Receivable, Past Due [Line Items]
Loans		2,247,977	2,063,201
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans		5,891,038	5,271,421
Nonaccrual loans	[1]	23,931	23,022
Commercial and industrial | Purchased credit impaired, accruing
Financing Receivable, Past Due [Line Items]
Loans		325	623
Commercial and industrial | Purchased credit impaired, nonaccruing
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	[1]	1,429	38
Commercial and industrial | Past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		17,601	22,533
Commercial and industrial | 30-89 days past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		16,524	21,451
Commercial and industrial | 90 days or more past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		1,077	1,082
Commercial and industrial | Current and Accruing
Financing Receivable, Past Due [Line Items]
Loans		5,847,752	5,225,205
Consumer and other
Financing Receivable, Past Due [Line Items]
Loans		466,554	354,272
Nonaccrual loans	[1]	176	983
Consumer and other | Purchased credit impaired, accruing
Financing Receivable, Past Due [Line Items]
Loans		0	0
Consumer and other | Purchased credit impaired, nonaccruing
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	[1]	0	0
Consumer and other | Past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		3,866	3,752
Consumer and other | 30-89 days past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		3,266	3,276
Consumer and other | 90 days or more past due and accruing
Financing Receivable, Past Due [Line Items]
Loans		600	476
Consumer and other | Current and Accruing
Financing Receivable, Past Due [Line Items]
Loans		$ 462,512	$ 349,537
[1]	Approximately $33.5 million and $52.5 million of nonaccrual loans as of September 30, 2019 and December 31, 2018 , respectively, were performing pursuant to their contractual terms at those dates .

Loans and Allowance for Loan_10

Loans and Allowance for Loan Losses - Allowance Allocation (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Allowance for Loan Losses	$ 93,647,000	$ 83,575,000
Troubled debt restructurings performing as of restructure date	5,800,000	5,900,000
Troubled Debt Restructurings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Allowance for Loan Losses	$ 0	$ 0

Loans and Allowance for Loan_11

Loans and Allowance for Loan Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 90,253	$ 75,670	$ 83,575	$ 67,240
Charged-off loans	(6,780)	(6,949)	(21,328)	(22,316)
Recovery of previously charged-off loans	1,914	2,539	8,761	10,003
Provision for loan losses	8,260	8,725	22,639	25,058
Ending Balance	93,647	79,985	93,647	79,985
Commercial real estate - mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	30,826	24,848	26,946	21,188
Charged-off loans	(102)	(1,968)	(1,701)	(2,930)
Recovery of previously charged-off loans	209	63	1,173	1,517
Provision for loan losses	1,684	3,574	6,199	6,742
Ending Balance	32,617	26,517	32,617	26,517
Consumer real estate - mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	8,489	5,853	7,670	5,031
Charged-off loans	(194)	(262)	(1,124)	(1,533)
Recovery of previously charged-off loans	901	987	1,642	2,190
Provision for loan losses	(1,426)	149	(418)	1,039
Ending Balance	7,770	6,727	7,770	6,727
Construction and land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	11,206	10,984	11,128	8,962
Charged-off loans	(14)	(24)	(18)	(36)
Recovery of previously charged-off loans	97	70	238	1,645
Provision for loan losses	585	(48)	526	411
Ending Balance	11,874	10,982	11,874	10,982
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	37,436	28,338	31,731	24,863
Charged-off loans	(5,082)	(3,336)	(13,842)	(7,600)
Recovery of previously charged-off loans	407	1,037	4,749	2,492
Provision for loan losses	1,814	4,085	11,937	10,369
Ending Balance	34,575	30,124	34,575	30,124
Consumer and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,114	5,172	5,423	5,874
Charged-off loans	(1,388)	(1,359)	(4,643)	(10,217)
Recovery of previously charged-off loans	300	382	959	2,159
Provision for loan losses	3,278	618	2,565	6,997
Ending Balance	4,304	4,813	4,304	4,813
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	182	475	677	1,322
Charged-off loans	0	0	0	0
Recovery of previously charged-off loans	0	0	0	0
Provision for loan losses	2,325	347	1,830	(500)
Ending Balance	$ 2,507	$ 822	$ 2,507	$ 822

Loans and Allowance for Loan_12

Loans and Allowance for Loan Losses - Details on Allowance for Loan Losses and Recorded Investment by Loan Classification and Impairment Evaluation Method (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		$ 87,532		$ 78,934
Individually evaluated for impairment		3,608		3,964
Total allowance for loan losses		93,647	$ 90,253	83,575	$ 79,985	$ 75,670	$ 67,240
Collectively evaluated for impairment		19,253,788		17,599,074
Individually evaluated for impairment		70,982		83,146
Loans		19,345,642		17,707,549
Loans acquired with deteriorated credit quality(1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	0		0
Loans acquired with deteriorated credit quality		20,872		25,329
Commercial real estate - mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		31,596		26,222
Individually evaluated for impairment		1,021		724
Total allowance for loan losses		32,617	30,826	26,946	26,517	24,848	21,188
Collectively evaluated for impairment		7,678,415		7,124,117
Individually evaluated for impairment		21,818		28,838
Loans		7,709,245		7,164,954
Commercial real estate - mortgage | Loans acquired with deteriorated credit quality(1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	0		0
Loans acquired with deteriorated credit quality		9,012		11,999
Consumer real estate - mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		6,705		6,227
Individually evaluated for impairment		1,065		1,443
Total allowance for loan losses		7,770	8,489	7,670	6,727	5,853	5,031
Collectively evaluated for impairment		2,994,237		2,808,142
Individually evaluated for impairment		24,205		27,111
Loans		3,025,502		2,844,447
Consumer real estate - mortgage | Loans acquired with deteriorated credit quality(1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	0		0
Loans acquired with deteriorated credit quality		7,060		9,194
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		11,859		11,100
Individually evaluated for impairment		15		28
Total allowance for loan losses		11,874	11,206	11,128	10,982	10,984	8,962
Collectively evaluated for impairment		2,249,962		2,066,613
Individually evaluated for impairment		295		2,367
Loans		2,253,303		2,072,455
Construction and land development | Loans acquired with deteriorated credit quality(1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	0		0
Loans acquired with deteriorated credit quality		3,046		3,475
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		33,078		30,290
Individually evaluated for impairment		1,497		1,441
Total allowance for loan losses		34,575	37,436	31,731	30,124	28,338	24,863
Collectively evaluated for impairment		5,864,796		5,246,913
Individually evaluated for impairment		24,488		23,847
Loans		5,891,038		5,271,421
Commercial and industrial | Loans acquired with deteriorated credit quality(1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	0		0
Loans acquired with deteriorated credit quality		1,754		661
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		4,294		5,095
Individually evaluated for impairment		10		328
Total allowance for loan losses		4,304	2,114	5,423	4,813	5,172	5,874
Collectively evaluated for impairment		466,378		353,289
Individually evaluated for impairment		176		983
Loans		466,554		354,272
Consumer and other | Loans acquired with deteriorated credit quality(1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	0		0
Loans acquired with deteriorated credit quality		0		0
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment
Individually evaluated for impairment
Total allowance for loan losses		2,507	$ 182	677	$ 822	$ 475	$ 1,322
Unallocated | Loans acquired with deteriorated credit quality(1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]
[1]	Loans acquired with deteriorated credit quality are recorded at fair value at the time of acquisition. An allowance for loan losses is recorded only in the event of subsequent credit deterioration.

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 5,100,000		$ 5,100,000
Interest and penalties			$ 0	$ 0
Effective income tax rate (as percent)	19.50%	20.70%	19.60%	20.30%
Federal and State income tax statutory rate (as percent)			26.14%	26.14%
Excess tax benefit	$ 131,000	$ 199,000	$ 832,000	$ 3,000,000

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Expiry period of standby letter of credit, maximum	2 years
Accrual for inherent risks associated with commitments	$ 2.4	$ 2.9
Commitments
Loss Contingencies [Line Items]
Amount of commitment	7,800
Home Equity Line of Credit
Loss Contingencies [Line Items]
Amount of commitment	1,000
Standby letter of credit
Loss Contingencies [Line Items]
Amount of commitment	$ 198.4

Stock Options and Restricted _3

Stock Options and Restricted Shares - Narrative (Details) - USD ($) $ in Thousands	Jul. 31, 2015	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 5,018	$ 4,503	$ 15,091	$ 13,254
Remaining Share-Based Compensation on Unvested Restricted Stock Awards		$ 40,400		$ 40,400
Weighted Average Remaining Period of Sharebased Compensation Expense				1 year 8 months 8 days
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		1,200,000		1,200,000
BNC Bancorp 2013 Omnibus Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		8,000		8,000
Plans other than 2018 Omnibus Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		0		0
CapitalMark Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		0		0
Shares acquired in period (in shares)	858,000

Stock Options and Restricted _4

Stock Options and Restricted Shares - Common Stock Options (Details) - Common stock options $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)$ / sharesshares		Dec. 31, 2018USD ($)$ / sharesshares
Number
Outstanding, beginning balance (in shares)	176,709
Granted (in shares)	0
Exercised (in shares)	(10,285)
Forfeited (in shares)	0
Outstanding, ending balance (in shares)	166,424		176,709
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 22.77
Outstanding, ending balance (in dollars per share) | $ / shares	$ 22.69		$ 22.77
Additional disclosures
Options exercisable (in shares)	166,424
Weighted- average exercise price of options exercisable (in dollars per share) | $ / shares	$ 22.69
Weighted-average contractual remaining term for options outstanding	2 years 6 months 14 days		2 years 2 months 23 days
Weighted-average contractual remaining term for options exercisable	2 years 6 months 14 days
Aggregate intrinsic value | $	$ 5,732	[1]	$ 4,123	[2]
Aggregate intrinsic value of options exercisable | $	$ 5,732	[1]
Quoted closing price of common stock (in dollars per share) | $ / shares	$ 56.75		$ 46.10
Number of awards used in aggregate intrinsic value (in shares)	166,424		176,709
[1]	The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of Pinnacle Financial common stock of $56.75 per common share at September 30, 2019 for the 166,424 options that were in-the-money at September 30, 2019 .
[2]	The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of Pinnacle Financial common stock of $46.10 per common share at December 31, 2018 for the 176,709 options that were in-the-money at December 31, 2018 .

Stock Options and Restricted _5

Stock Options and Restricted Shares - Unvested Restricted Awards (Details) - Restricted stock	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Number
Unvested, beginning of period (in shares)	692,806
Shares awarded (in shares)	228,760
Restrictions lapsed and shares released to associates/directors (in shares)	(296,878)
Shares forfeited (in shares)	(28,875)	[1]
Unvested, end of period (in shares)	595,813
Grant Date Weighted-Average Cost
Unvested, beginning of period (in dollars per share) | $ / shares	$ 55.19
Unvested, end of period (in dollars per share) | $ / shares	$ 53.21
Shares forfeited due to failure to meet performance targets (in shares)	0
[1]	Represents shares forfeited due to employee termination and/or retirement. No shares were forfeited due to failure to meet performance targets.

Stock Options and Restricted _6

Stock Options and Restricted Shares - Restricted Shares Awarded (Details)	9 Months Ended
	Sep. 30, 2019shares
Time Based Awards | Associates
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded	212,211	[1],[2]
Restrictions Lapsed and shares released to participants	276	[1],[2]
Shares Forfeited by participants	9,815	[1],[2],[3]
Shares Unvested	202,120	[1],[2]
Time Based Awards | Associates | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period in years	3 years
Time Based Awards | Associates | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period in years	5 years
Outside Director Awards | Outside directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period in years	1 year	[1],[4]
Shares awarded	16,549	[1],[4]
Restrictions Lapsed and shares released to participants	0	[1],[4]
Shares Forfeited by participants	0	[1],[3],[4]
Shares Unvested	16,549	[1],[4]
[1]	Groups include employees (referred to as associates above) and outside directors. When the restricted shares are awarded, a participant receives voting rights and forfeitable dividend rights with respect to the shares, but is not able to transfer the shares until the restrictions have lapsed. Once the restrictions lapse, the participant is taxed on the value of the award and may elect to sell some shares (or have Pinnacle Financial withhold some shares) to pay the applicable income taxes associated with the award. Alternatively, the recipient can pay the withholding taxes in cash. For time-based vesting restricted share awards, dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination. For performance-based vesting awards to Pinnacle Financial's directors, dividends are placed into escrow until the forfeiture restrictions on such shares lapse.
[2]	The forfeiture restrictions on these restricted share awards lapse in equal annual installments on the anniversary date of the grant.
[3]	These shares represent forfeitures resulting from recipients whose employment or board membership was terminated during the year-to-date period ended September 30, 2019 . Any dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination or will not be distributed from escrow, as applicable.
[4]	Restricted share awards are issued to the outside members of the board of directors in accordance with their board compensation plan. Restrictions lapse on February 29, 2020 based on each individual board member meeting their attendance goals for the various board and board committee meetings to which each member was scheduled to attend.

Stock Options and Restricted _7

Stock Options and Restricted Shares - Restricted Share Unit Awards Outstanding (Details)	9 Months Ended
	Sep. 30, 2019shares
2019 Restricted granted shares | Tranche 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	3 years
2019 Restricted granted shares | Tranche 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	2 years
2019 Restricted granted shares | Tranche 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	1 year
2019 Restricted granted shares | Named Executive Officers (NEOs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	166,211	[1]
2019 Restricted granted shares | Named Executive Officers (NEOs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	249,343	[1]
2019 Restricted granted shares | Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	52,244
2018 Restricted granted shares | Tranche 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	3 years
2018 Restricted granted shares | Tranche 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	2 years
2018 Restricted granted shares | Tranche 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	1 year
2018 Restricted granted shares | Named Executive Officers (NEOs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	96,878	[1]
2018 Restricted granted shares | Named Executive Officers (NEOs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	145,339	[1]
2018 Restricted granted shares | Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	25,990
2017 Restricted granted shares | Tranche 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	3 years
2017 Restricted granted shares | Tranche 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	2 years
2017 Restricted granted shares | Tranche 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	1 year
2017 Restricted granted shares | Named Executive Officers (NEOs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	72,537	[1]
2017 Restricted granted shares | Named Executive Officers (NEOs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	109,339	[1]
2017 Restricted granted shares | Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	24,916
2016 Restricted granted shares | Tranche 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	3 years
2016 Restricted granted shares | Tranche 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	2 years
2016 Restricted granted shares | Tranche 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	1 year
2016 Restricted granted shares | Named Executive Officers (NEOs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	73,474	[1]
2016 Restricted granted shares | Named Executive Officers (NEOs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	110,223	[1]
2016 Restricted granted shares | Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	26,683
2015 Restricted granted shares | Tranche 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	3 years
2015 Restricted granted shares | Tranche 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	2 years
2015 Restricted granted shares | Tranche 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	1 year
2015 Restricted granted shares | Named Executive Officers (NEOs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	58,200	[1]
2015 Restricted granted shares | Named Executive Officers (NEOs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	101,850	[1]
2015 Restricted granted shares | Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	28,378
[1]	The named executive officers are awarded a range of awards that may be earned based on attainment of goals between a target level of performance and a maximum level of performance.

Derivative Instruments - Non-he

Derivative Instruments - Non-hedge Derivatives (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement	Other noninterest income	Other noninterest income	Other noninterest income	Other noninterest income
Derivative, Gain (Loss) on Derivative, Net	$ (44)	$ (8)	$ (146)	$ (42)
Notional Amount	2,539,760		2,539,760		$ 2,119,448
Estimated Fair Value	$ (274)		$ (274)		$ (128)
Assets
Derivative [Line Items]
Description of Location of Interest Rate Derivatives on Balance Sheet	Other assets		Other assets		Other assets
Notional Amount	$ 1,269,880		$ 1,269,880		$ 1,059,724
Estimated Fair Value	$ 56,846		$ 56,846		$ 22,273
Liabilities
Derivative [Line Items]
Description of Location of Interest Rate Derivatives on Balance Sheet	Other liabilities		Other liabilities		Other liabilities
Notional Amount	$ 1,269,880		$ 1,269,880		$ 1,059,724
Estimated Fair Value	$ (57,120)		$ (57,120)		$ (22,401)

Derivative Instruments - Hedge

Derivative Instruments - Hedge Derivatives (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Document Period End Date				Sep. 30, 2019
Closed Portfolio and Beneficial Interest, Last-of-Layer, Amortized Cost						$ 2,700,000,000
Gain on cash flow hedges reclassified from other comprehensive income into net income, net of tax		$ 1,129,000	$ (145,000)	$ 946,000	$ (429,000)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months				$ 908,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement		Other noninterest income	Other noninterest income	Other noninterest income	Other noninterest income
Hedging derivative | Cash flow hedge
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)		$ 1,882,000	$ 783,000	$ 8,303,000	$ 3,453,000
Hedging derivative | Fair value hedge
Derivative [Line Items]
Weighted Average Remaining Maturity				7 years 3 months 14 days
Pay Rate (as percent)		3.08%		3.08%
Forecasted Notional Amount		$ 477,905,000		$ 477,905,000		1,377,905,000
Fair Value Hedge Assets		$ (51,927,000)		$ (51,927,000)		(21,833,000)
Hedging derivative | Fair value hedge | Securities
Derivative [Line Items]
Weighted Average Remaining Maturity				7 years 3 months 14 days
Pay Rate (as percent)		3.08%		3.08%
Derivative, Type of Interest Rate Paid on Swap				3 month LIBOR
Forecasted Notional Amount		$ 477,905,000		$ 477,905,000		477,905,000
Fair Value Hedge Assets		(51,927,000)		(51,927,000)		(14,796,000)
Derivative Instruments and Hedges, Assets		512,035,000		512,035,000		515,063,000
Fair Value Hedging Adjustment		51,927,000		$ 51,927,000		14,796,000
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement				Interest income on securities
Description of Location of Interest Rate Fair Value Hedge Derivative on Balance Sheet				Other liabilities
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge		10,888,000	(1,755,000)	$ 37,131,000	(1,991,000)
Gain (Loss) on Fair Value Hedges Recognized in Earnings		(10,888,000)	1,755,000	(37,131,000)	1,991,000
Hedging derivative | Fair value hedge | Loans
Derivative [Line Items]
Forecasted Notional Amount		0		0		900,000,000
Fair Value Hedge Assets		0		0		(7,037,000)
Derivative Instruments and Hedges, Assets	[1]	0		0		907,037,000
Fair Value Hedging Adjustment	[1]	0		$ 0		7,037,000
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement				Interest income on loans
Description of Location of Interest Rate Fair Value Hedge Derivative on Balance Sheet				Other liabilities
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge		0	(2,236,000)	$ 6,915,000	(3,358,000)
Gain (Loss) on Fair Value Hedges Recognized in Earnings		0	2,236,000	(6,915,000)	3,358,000
Swap termination payment				14,000,000
Fair value hedging adjustment		14,000,000		14,000,000
Amortization expense, reduction to interest income on loans		931,000		1,400,000
Asset derivatives | Hedging derivative | Cash flow hedge
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)		$ 1,951,000	0	$ 9,875,000	0
Description of Location of Interest Rate Cash Flow Hedge Derivative on Balance Sheet				Other assets
Weighted Average Remaining Maturity				2 years 1 month 2 days
Pay Rate (as percent)		0.00%		0.00%
Receive Rate				2.75% minus 1 month LIBOR
Forecasted Notional Amount		$ 1,300,000,000		$ 1,300,000,000		0
Cash Flow Hedges Derivative Instruments at Fair Value, Net		35,681,000		35,681,000		0
Liability derivatives | Hedging derivative | Cash flow hedge
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)		$ (69,000)	$ 783,000	$ (1,572,000)	$ 3,453,000
Description of Location of Interest Rate Cash Flow Hedge Derivative on Balance Sheet				Other liabilities
Weighted Average Remaining Maturity				2 years 7 months 6 days
Pay Rate (as percent)		3.09%		3.09%
Receive Rate				3 month LIBOR
Forecasted Notional Amount		$ 99,000,000		$ 99,000,000		99,000,000
Cash Flow Hedges Derivative Instruments at Fair Value, Net		$ (3,886,000)		$ (3,886,000)		$ (1,757,000)
[1]	The carrying amount as shown represents the designated last-of-layer. At December 31, 2018, the total amortized cost basis of the closed portfolio of loans designated in these hedging relationships was $ 2.7 billion.

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Valuation allowance		$ 3,608	$ 3,964
Recurring
Assets, Fair Value Disclosure [Abstract]
U.S. Treasury securities		48,662	30,300
U.S. government agency securities		92,246	70,159
Mortgage-backed securities		1,334,517	1,310,945
State and municipal securities		1,699,886	1,229,654
Agency-backed securities		162,733	375,582
Corporate notes and other		55,391	67,046
Total investment securities available-for-sale		3,393,435	3,083,686
Other Investments		59,195	50,791
Other assets		96,814	24,524
Total assets at fair value		3,549,444	3,159,001
Liabilities at fair value: [Abstract]
Other liabilities		113,070	46,550
Total liabilities at fair value		113,070	46,550
Recurring | Quoted market prices in an active market (Level 1)
Assets, Fair Value Disclosure [Abstract]
U.S. Treasury securities		0	0
U.S. government agency securities		0	0
Mortgage-backed securities		0	0
State and municipal securities		0	0
Agency-backed securities		0	0
Corporate notes and other		0	0
Total investment securities available-for-sale		0	0
Other Investments		0	0
Other assets		0	0
Total assets at fair value		0	0
Liabilities at fair value: [Abstract]
Other liabilities		0	0
Total liabilities at fair value		0	0
Recurring | Models with significant observable market parameters (Level 2)
Assets, Fair Value Disclosure [Abstract]
U.S. Treasury securities		48,662	30,300
U.S. government agency securities		92,246	70,159
Mortgage-backed securities		1,334,517	1,310,945
State and municipal securities		1,684,020	1,215,059
Agency-backed securities		162,733	375,582
Corporate notes and other		55,391	67,046
Total investment securities available-for-sale		3,377,569	3,069,091
Other Investments		25,247	24,369
Other assets		96,814	24,524
Total assets at fair value		3,499,630	3,117,984
Liabilities at fair value: [Abstract]
Other liabilities		113,070	46,550
Total liabilities at fair value		113,070	46,550
Recurring | Models with significant unobservable market parameters (Level 3)
Assets, Fair Value Disclosure [Abstract]
U.S. Treasury securities		0	0
U.S. government agency securities		0	0
Mortgage-backed securities		0	0
State and municipal securities		15,866	14,595
Agency-backed securities		0	0
Corporate notes and other		0	0
Total investment securities available-for-sale		15,866	14,595
Other Investments		33,948	26,422
Other assets		0	0
Total assets at fair value		49,814	41,017
Liabilities at fair value: [Abstract]
Other liabilities		0	0
Total liabilities at fair value		0	0
Nonrecurring
Assets, Fair Value Disclosure [Abstract]
Total assets at fair value		71,190	55,995
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	41,141	40,830
Other real estate owned		30,049	15,165
Nonrecurring | Quoted market prices in an active market (Level 1)
Assets, Fair Value Disclosure [Abstract]
Total assets at fair value		0	0
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	0	0
Other real estate owned		0	0
Nonrecurring | Models with significant observable market parameters (Level 2)
Assets, Fair Value Disclosure [Abstract]
Total assets at fair value		0	0
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	0	0
Other real estate owned		0	0
Nonrecurring | Models with significant unobservable market parameters (Level 3)
Assets, Fair Value Disclosure [Abstract]
Total assets at fair value		71,190	55,995
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	41,141	40,830
Other real estate owned		$ 30,049	$ 15,165
[1]	Amount is net of valuation allowance of $3.6 million and $4.0 million at September 30, 2019 and December 31, 2018 , respectively, as required by ASC 310-10, "Receivables."

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Rollforward of Balance Sheet Amounts Within Level 3 Valuation Hierarchy (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward]
Transfers out of Level 3			$ 0
Recurring | Other assets
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward]
Fair value, beginning of period	$ 31,522	$ 23,578	26,422	$ 28,874
Total realized gains included in income	1,264	81	2,193	2,858
Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at period-end	0	0	0	0
Purchases	1,777	2,455	6,965	7,273
Issuances	0	0	0	0
Settlements	615	932	1,632	1,657
Transfers out of Level 3	0	0	0	(12,166)
Fair value, end of period	33,948	25,182	33,948	25,182
Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at period-end	1,264	81	2,193	2,858
Recurring | Available-for-sale Securities
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward]
Fair value, beginning of period	15,263	15,290	14,595	17,029
Total realized gains included in income	29	30	87	90
Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at period-end	574	34	1,583	(597)
Purchases	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	(399)	(1,168)
Transfers out of Level 3	0	0	0	0
Fair value, end of period	15,866	15,354	15,866	15,354
Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at period-end	$ 29	$ 30	$ 87	$ 90

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Financial assets:
Securities held-to-maturity		$ 202,821	$ 193,131
Quoted market prices in an active market (Level 1)
Financial assets:
Securities held-to-maturity		0	0
Loans, net		0	0
Consumer loans held-for-sale		0	0
Commercial loans held-for-sale		0	0
Financial liabilities:
Deposits and securities sold under agreements to repurchase		0	0
Federal Home Loan Bank advances		0	0
Subordinated debt and other borrowings		0	0
Off-balance sheet instruments:
Commitments to extend credit	[1]	0	0
Standby letters of credit	[2]	0	0
Models with significant observable market parameters (Level 2)
Financial assets:
Securities held-to-maturity		202,821	193,131
Loans, net		0	0
Consumer loans held-for-sale		74,161	34,929
Commercial loans held-for-sale		21,638	16,296
Financial liabilities:
Deposits and securities sold under agreements to repurchase		0	0
Federal Home Loan Bank advances		0	0
Subordinated debt and other borrowings		0	0
Off-balance sheet instruments:
Commitments to extend credit	[1]	0	0
Standby letters of credit	[2]	0	0
Models with significant unobservable market parameters (Level 3)
Financial assets:
Securities held-to-maturity		0	0
Loans, net		19,216,128	17,288,795
Consumer loans held-for-sale		0	0
Commercial loans held-for-sale		0	0
Financial liabilities:
Deposits and securities sold under agreements to repurchase		19,442,956	18,337,848
Federal Home Loan Bank advances		2,070,645	1,432,003
Subordinated debt and other borrowings		713,051	464,616
Off-balance sheet instruments:
Commitments to extend credit	[1]	1,067	1,733
Standby letters of credit	[2]	1,300	1,131
Carrying/ Notional Amount
Financial assets:
Securities held-to-maturity		189,684	194,282
Loans, net		19,251,995	17,623,974
Consumer loans held-for-sale		73,042	34,196
Commercial loans held-for-sale		21,312	15,954
Financial liabilities:
Deposits and securities sold under agreements to repurchase		20,096,079	18,953,848
Federal Home Loan Bank advances		2,052,548	1,443,589
Subordinated debt and other borrowings		750,488	485,130
Off-balance sheet instruments:
Commitments to extend credit	[1]	7,797,246	6,921,689
Standby letters of credit	[2]	198,361	177,475
Estimated Fair Value
Financial assets:
Securities held-to-maturity	[3]	202,821	193,131
Loans, net	[3]	19,216,128	17,288,795
Consumer loans held-for-sale	[3]	74,161	34,929
Commercial loans held-for-sale	[3]	21,638	16,296
Financial liabilities:
Deposits and securities sold under agreements to repurchase	[3]	19,442,956	18,337,848
Federal Home Loan Bank advances	[3]	2,070,645	1,432,003
Subordinated debt and other borrowings	[3]	713,051	464,616
Off-balance sheet instruments:
Commitments to extend credit	[1],[3]	1,067	1,733
Standby letters of credit	[2],[3]	$ 1,297	$ 1,131
[1]	At the end of each quarter, Pinnacle Financial evaluates the inherent risks of the outstanding off-balance sheet commitments. In making this evaluation, Pinnacle Financial evaluates the credit worthiness of the borrower, the collateral supporting the commitments and any other factors similar to those used to evaluate the inherent risks of our loan portfolio. Additionally, Pinnacle Financial evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at September 30, 2019 and December 31, 2018 , Pinnacle Financial included in other liabilities $2.4 million and $2.9 million, respectively, representing the inherent risks associated with these off-balance sheet commitments.
[2]	At September 30, 2019 and December 31, 2018 , the aggregate fair value of Pinnacle Financial's standby letters of credit was $1.3 million and $1.1 million, respectively. These amounts represent the unamortized fee associated with these standby letters of credit and are included in the consolidated balance sheets of Pinnacle Financial and are believed to approximate fair value. These fair values will decrease over time as the existing standby letters of credit approach their expiration dates.
[3]	Estimated fair values are consistent with an exit-price concept. The assumptions used to estimate the fair values are intended to approximate those that a market-participant would realize in a hypothetical orderly transaction.

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
		Sep. 30, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Preceding period of retained earnings used in calculation of dividend payable		2 years
Retained earnings		$ 1,100,517	$ 833,130
Quarterly common stock dividend (in dollar per share)		$ 0.16
Pinnacle Financial
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid to Pinnacle Financial by Pinnacle Bank		$ 96,300
Actual
Total capital to risk weighted assets		3,093,547	2,580,143
Tier I capital to risk weighted assets		2,238,535	2,024,193
Common Equity Tier I capital to risk weighted assets		2,238,413	2,024,070
Tier I capital to average assets	[1]	$ 2,238,535	$ 2,024,193
Actual
Total capital to risk weighted assets (as percent)		13.20%	12.20%
Tier I capital to risk weighted assets (as percent)		9.60%	9.60%
Common Equity Tier I capital to risk weighted assets (as percent)		9.60%	9.60%
Tier I capital to average assets (as percent)	[1]	8.90%	8.90%
Minimum Capital Requirement
Total capital to risk weighted assets		$ 1,874,904	$ 1,691,017
Tier I capital to risk weighted assets		1,406,178	1,268,263
Common Equity Tier I capital		1,054,634	951,197
Tier I capital to average assets	[1]	$ 1,003,329	$ 909,102
Minimum Capital Requirement
Total capital to risk weighted assets (as percent)		8.00%	8.00%
Tier I capital to risk weighted assets (as percent)		6.00%	6.00%
Common Equity Tier I capital to risk weighted assets (as percent)		4.50%	4.50%
Tier I capital to average assets (as percent)	[1]	4.00%	4.00%
Pinnacle Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Retained earnings		$ 617,500
Actual
Total capital to risk weighted assets		2,818,988	$ 2,432,419
Tier I capital to risk weighted assets		2,592,976	2,218,003
Common Equity Tier I capital to risk weighted assets		2,592,854	2,217,880
Tier I capital to average assets	[1]	$ 2,592,976	$ 2,218,003
Actual
Total capital to risk weighted assets (as percent)		12.10%	11.50%
Tier I capital to risk weighted assets (as percent)		11.10%	10.50%
Common Equity Tier I capital to risk weighted assets (as percent)		11.10%	10.50%
Tier I capital to average assets (as percent)	[1]	10.40%	9.80%
Minimum Capital Requirement
Total capital to risk weighted assets		$ 1,869,627	$ 1,686,046
Tier I capital to risk weighted assets		1,402,221	1,264,535
Common Equity Tier I capital		1,051,665	948,401
Tier I capital to average assets	[1]	$ 998,695	$ 906,185
Minimum Capital Requirement
Total capital to risk weighted assets (as percent)		8.00%	8.00%
Tier I capital to risk weighted assets (as percent)		6.00%	6.00%
Common Equity Tier I capital to risk weighted assets (as percent)		4.50%	4.50%
Tier I capital to average assets (as percent)	[1]	4.00%	4.00%
Minimum To Be Well-Capitalized Under Prompt Corrective Action Resolutions
Total capital to risk weighted assets		$ 2,337,034	$ 2,107,558
Tier I capital to risk weighted assets		1,869,627	1,686,046
Common Equity Tier I capital to risk weighted assets		1,519,072	1,369,912
Tier I capital to average assets	[1]	$ 1,248,369	$ 1,132,731
Minimum To Be Well-Capitalized Under Prompt Corrective Action Resolutions
Total capital to risk weighted assets (as percent)		10.00%	10.00%
Tier I capital to risk weighted assets (as percent)		8.00%	8.00%
Common Equity Tier I capital to risk weighted assets (as percent)		6.50%	6.50%
Tier I capital to average assets (as percent)	[1]	5.00%	5.00%
[1]	(*) Average assets for the above calculations were based on the most recent quarter.

Subordinated Debt and Other b_3

Subordinated Debt and Other borrowings (Details)		Sep. 11, 2019USD ($)	Sep. 30, 2019USD ($)subsidiary	Dec. 31, 2019USD ($)	Jul. 30, 2020USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Number of wholly owned subsidiaries | subsidiary			12
Term			30 years
Total Debt Outstanding			$ 750,488,000			$ 485,130,000
Debt issuance costs and fair value adjustments			(12,507,000)
Revolving credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 75,000,000
Date Established			Apr. 25, 2019
Maturity			Apr. 24, 2020
Total Debt Outstanding	[1]		$ 0
Interest Rate (as percent)	[1]		3.94%
Debt instrument, basis spread on variable rate (as percent)			1.50%
Coupon Structure			30-day LIBOR + 1.50%
Line of credit outstanding			$ 0
Unused fee, percentage			0.30%
Pinnacle Statutory Trust I
Debt Instrument [Line Items]
Date Established			Dec. 29, 2003
Maturity			Dec. 30, 2033
Total Debt Outstanding			$ 10,310,000
Interest Rate (as percent)			4.94%
Coupon Structure			30-day LIBOR + 2.80%
Pinnacle Statutory Trust II
Debt Instrument [Line Items]
Date Established			Sep. 15, 2005
Maturity			Sep. 30, 2035
Total Debt Outstanding			$ 20,619,000
Interest Rate (as percent)			3.50%
Coupon Structure			30-day LIBOR + 1.40%
Pinnacle Statutory Trust III
Debt Instrument [Line Items]
Date Established			Sep. 7, 2006
Maturity			Sep. 30, 2036
Total Debt Outstanding			$ 20,619,000
Interest Rate (as percent)			3.75%
Coupon Structure			30-day LIBOR + 1.65%
Pinnacle Statutory Trust IV
Debt Instrument [Line Items]
Date Established			Oct. 31, 2007
Maturity			Sep. 30, 2037
Total Debt Outstanding			$ 30,928,000
Interest Rate (as percent)			4.97%
Coupon Structure			30-day LIBOR + 2.85%
BNC Capital Trust I
Debt Instrument [Line Items]
Date Established			Apr. 3, 2003
Maturity			Apr. 15, 2033
Total Debt Outstanding			$ 5,155,000
Interest Rate (as percent)			5.55%
Coupon Structure			30-day LIBOR + 3.25%
BNC Capital Trust II
Debt Instrument [Line Items]
Date Established			Mar. 11, 2004
Maturity			Apr. 7, 2034
Total Debt Outstanding			$ 6,186,000
Interest Rate (as percent)			5.15%
Coupon Structure			30-day LIBOR + 2.85%
BNC Capital Trust III
Debt Instrument [Line Items]
Date Established			Sep. 23, 2004
Maturity			Sep. 23, 2034
Total Debt Outstanding			$ 5,155,000
Interest Rate (as percent)			4.70%
Coupon Structure			30-day LIBOR + 2.40%
BNC Capital Trust IV
Debt Instrument [Line Items]
Date Established			Sep. 27, 2006
Maturity			Dec. 31, 2036
Total Debt Outstanding			$ 7,217,000
Interest Rate (as percent)			3.80%
Coupon Structure			30-day LIBOR + 1.70%
Valley Financial Trust I
Debt Instrument [Line Items]
Date Established			Jun. 26, 2003
Maturity			Jun. 26, 2033
Total Debt Outstanding			$ 4,124,000
Interest Rate (as percent)			5.21%
Coupon Structure			30-day LIBOR + 3.10%
Valley Financial Trust II
Debt Instrument [Line Items]
Date Established			Sep. 26, 2005
Maturity			Dec. 15, 2035
Total Debt Outstanding			$ 7,217,000
Interest Rate (as percent)			3.61%
Coupon Structure			30-day LIBOR + 1.49%
Valley Financial Trust III
Debt Instrument [Line Items]
Date Established			Dec. 15, 2006
Maturity			Jan. 30, 2037
Total Debt Outstanding			$ 5,155,000
Interest Rate (as percent)			4.00%
Coupon Structure			30-day LIBOR + 1.73%
Southcoast Capital Trust III
Debt Instrument [Line Items]
Date Established			Aug. 5, 2005
Maturity			Sep. 30, 2035
Total Debt Outstanding			$ 10,310,000
Interest Rate (as percent)			3.60%
Coupon Structure			30-day LIBOR + 1.50%
Pinnacle Bank Subordinated Notes (2015)
Debt Instrument [Line Items]
Date Established			Jul. 30, 2015
Maturity			Jul. 30, 2025
Total Debt Outstanding	[2]		$ 60,000,000
Interest Rate (as percent)	[2]		4.88%
Debt instrument, basis spread on variable rate (as percent)			3.128%
Coupon Structure			three month LIBOR + 3.128%
Pinnacle Bank Subordinated Notes
Debt Instrument [Line Items]
Date Established			Mar. 10, 2016
Maturity			Jul. 30, 2025
Total Debt Outstanding	[2]		$ 70,000,000
Interest Rate (as percent)	[2]		4.88%
Debt instrument, basis spread on variable rate (as percent)			3.128%
Debt instrument, term of variable rate			3 months
Coupon Structure			three month LIBOR + 3.128%
Avenue Subordinated Notes
Debt Instrument [Line Items]
Date Established			Dec. 29, 2014
Maturity			Dec. 29, 2024
Total Debt Outstanding	[3]		$ 20,000,000
Interest Rate (as percent)	[3]		6.75%
Debt instrument, basis spread on variable rate (as percent)			4.95%
Coupon Structure			three month LIBOR + 4.95%
Pinnacle Financial Subordinated Notes
Debt Instrument [Line Items]
Date Established			Nov. 16, 2016
Maturity			Nov. 16, 2026
Total Debt Outstanding	[4]		$ 120,000,000
Interest Rate (as percent)	[4]		5.25%
Debt instrument, basis spread on variable rate (as percent)			3.884%
Coupon Structure			three month LIBOR + 3.884%
Pinnacle Financial Notes 2019
Debt Instrument [Line Items]
Date Established			Sep. 11, 2019
Maturity			Sep. 15, 2029
Total Debt Outstanding	[5]		$ 300,000,000
Interest Rate (as percent)	[5]		4.13%
Debt instrument, basis spread on variable rate (as percent)			2.775%
Coupon Structure			three month LIBOR + 2.775%
Proceeds from Issuance of Debt		$ 296,500,000
Subordinated Debt Due 2023
Debt Instrument [Line Items]
Debt repurchase			$ 8,800,000
Debt interest rate (percentage)			7.23%
BNC Subordinated Notes
Debt Instrument [Line Items]
Date Established			Sep. 25, 2014
Maturity			Oct. 1, 2024
Total Debt Outstanding	[6]		$ 60,000,000
Interest Rate (as percent)	[6]		5.50%
Debt instrument, basis spread on variable rate (as percent)			3.59%
Coupon Structure			three month LIBOR + 3.59%
Forecast | Avenue Subordinated Notes
Debt Instrument [Line Items]
Debt, aggregate principal to be repurchased				$ 20,000,000
Forecast | Pinnacle Financial Subordinated Notes
Debt Instrument [Line Items]
Debt, aggregate principal to be repurchased					$ 130,000,000
Forecast | Pinnacle Bank Subordinated Notes
Debt Instrument [Line Items]
Proceeds from Issuance of Debt				210,000,000
Forecast | BNC Subordinated Notes
Debt Instrument [Line Items]
Debt, aggregate principal to be repurchased				$ 60,000,000
[1]	Borrowing capacity on the revolving credit facility is $75 .0 million. At September 30, 2019 , there were no amounts outstanding under this facility. An unused fee of 0.30% is assessed on the average daily unused amount of the loan.
[2]	Migrates to three month LIBOR + 3.128% beginning July 30, 2020 through the end of the term.
[3]	Migrates to three month LIBOR + 4.95% beginning January 1, 2020 through the end of the term.
[4]	Migrates to three month LIBOR + 3.884% beginning November 16, 2021 through the end of the term.
[5]	Migrates to three month LIBOR + 2.775% beginning September 15, 2024 through the end of the term.
[6]	Migrates to three month LIBOR + 3.59% beginning October 1, 2019 through the end of the term if not redeemed on that date.

Leases Schedule of Leases Asset

Leases Schedule of Leases Assets and Liabilities (Details) $ in Thousands	Sep. 30, 2019USD ($)
Right-of-use assets
Operating leases (1)	$ 74,151	[1]
Finance leases	2,044
Total right-of-use assets	76,195
Lease liabilities
Operating leases	82,150
Finance leases	3,302
Total lease liabilities	85,452
Tenant improvements allowances	1,700
Purchase accounting fair value adjustments	$ 2,800
Operating Lease, Weighted Average Remaining Lease Term	10 years 4 months 28 days
Finance Lease, Weighted Average Remaining Lease Term	9 years 1 month 2 days
Operating Lease, Weighted Average Discount Rate, Percent	3.28%
Finance Lease, Weighted Average Discount Rate, Percent	7.22%
[1]	Presented net of tenant improvement allowances of $1.7 million and purchase accounting fair value adjustments of $2.8 million .

Leases Lease Costs and Other In

Leases Lease Costs and Other Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Lease, Cost [Abstract]
Operating lease cost	$ 3,516,000		$ 10,488,000
Short-term lease cost	43,000		137,000
Interest on lease liabilities	60,000		183,000
Amortization of right-of-use asset	(56,000)		(169,000)
Sublease income	(562,000)		(1,123,000)
Net lease cost	3,113,000		9,854,000
Rent expense related to leases		$ 3,100,000		$ 9,400,000
Operating cash flows related to operating leases	3,432,000		10,193,000
Operating cash flows related to finance leases	(60,000)		(183,000)
Financing cash flows related to finance leases	$ 57,000		$ 168,000

Leases Schedule of leases both

Leases Schedule of leases both operating and finance (Details) $ in Thousands	Sep. 30, 2019USD ($)
Operating Leases
2019	$ 3,403	[1]
2020	12,992
2021	12,383
2022	10,619
2023	9,768
Thereafter	50,329
Total	99,494
Less: Imputed interest	(17,344)
Total lease liabilities	82,150
Finance Leases
2019	118	[1]
2020	470
2021	470
2022	470
2023	479
Thereafter	2,548
Total	4,555
Less: Imputed interest	(1,253)
Total lease liabilities	$ 3,302
[1]	Includes the period from October 1, 2019 through December 31, 2019.

Leases Schedule of leases bot_2

Leases Schedule of leases both operating and capital (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases, Operating [Abstract]
2019	$ 12,889
2020	11,805
2021	11,527
2022	9,410
2023	8,820
Thereafter	43,730
Future minimum lease payments	98,181
Leases, Capital [Abstract]
2019	470
2020	470
2021	470
2022	470
2023	479
Thereafter	2,548
Future minimum lease payments	4,907
Less: Imputed interest	1,437
Total capital lease liabilities	$ 3,470