Pinnacle Financial Partners (PNFP) 10-Q 6 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 03, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
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
Entity Common Stock, Shares Outstanding		75,848,853
Entity Central Index Key	0001115055
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Noncumulative Preferred Stock [Member]
Cover [Abstract]
Title of 12(b) Security	Depositary Shares (each representing 1/40th interest in a share of 6.75% Fixed-Rate Non-Cumulative Perpetual Preferred Stock, Series B)
Trading Symbol	PNFPP
Security Exchange Name	NASDAQ
Document Information [Line Items]
Title of 12(b) Security	Depositary Shares (each representing 1/40th interest in a share of 6.75% Fixed-Rate Non-Cumulative Perpetual Preferred Stock, Series B)
Trading Symbol	PNFPP
Security Exchange Name	NASDAQ
Common Class A [Member]
Cover [Abstract]
Title of 12(b) Security	Common Stock, par value $1.00
Trading Symbol	PNFP
Security Exchange Name	NASDAQ
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $1.00
Trading Symbol	PNFP
Security Exchange Name	NASDAQ

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets [Abstract]
Cash and noninterest-bearing due from banks	$ 179,231	$ 157,901
Restricted Cash, Current	247,761	137,045
Interest-bearing due from banks	2,604,646	210,784
Federal funds sold and other	11,687	20,977
Cash and cash equivalents	3,043,325	526,707
Available-for-sale Securities	3,463,422	3,539,995
Securities held-to-maturity (fair value of $1.1 billion, net of allowance for credit losses of $191,000 at Sept. 30, 2020 and $201.2 million at Dec. 31., 2019, respectively)	1,039,650	188,996
Consumer loans held-for-sale	82,748	81,820
Commercial loans held-for-sale	12,290	17,585
Loans and Leases Receivable, Net of Deferred Income	22,477,409	19,787,876
Less allowance for credit losses	(288,645)	(94,777)
Loans, net	22,188,764	19,693,099
Premises and equipment, net	287,711	273,932
Equity method investment	289,301	278,037
Accrued interest receivable	101,762	84,462
Goodwill	1,819,811	1,819,811
Core deposits and other intangible assets	44,713	51,130
Other real estate owned	19,445	29,487
Other assets	1,431,989	1,220,435
Total assets	33,824,931	27,805,496
Deposits:
Noninterest-bearing	7,050,670	4,795,476
Interest-bearing	4,995,769	3,630,168
Savings and money market accounts	10,513,645	7,813,939
Time	3,983,872	3,941,445
Total deposits	26,543,956	20,181,028
Securities sold under agreements to repurchase	127,059	126,354
Federal Home Loan Bank advances	1,287,738	2,062,534
Subordinated debt and other borrowings	670,273	749,080
Accrued interest payable	26,101	42,183
Other liabilities	382,496	288,569
Total liabilities	29,037,623	23,449,748
Shareholders' equity:
Preferred stock, no par value, 10.0 million shares authorized; 225,000 shares non-cumulative perpetual preferred stock, Series B, liquidation preference $225.0 million, issued and outstanding at Sept. 30, 2020 and no shares issued and outstanding at Dec. 31, 2019, respectively.	217,126	0
Common stock, par value $1.00; 180.0 million shares authorized; 75.8 million and 76.6 million shares issued and outstanding at Sept. 30, 2020 and Dec. 31, 2019, respectively	75,835	76,564
Additional paid-in capital	3,023,430	3,064,467
Retained earnings	1,312,929	1,184,183
Accumulated other comprehensive income, net of taxes	157,988	30,534
Total shareholders' equity	4,787,308	4,355,748
Liabilities and Equity	$ 33,824,931	$ 27,805,496

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Securities held-to-maturity, fair value	$ 1,060,847,000	$ 201,217,000
Allowance for credit losses - securities held-to-maturity	$ (191,000)	$ 0
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)	225,000	0
Preferred stock, shares outstanding (in shares)	225,000	0
Preferred Stock, Liquidation Preference Per Share	$ 1,000	$ 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)	75,835,000	76,564,000
Common stock, shares outstanding (in shares)	75,835,000	76,564,000

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income:
Loans, including fees	$ 224,482	$ 247,147	$ 687,183	$ 714,179
Securities:
Taxable	8,276	10,655	28,133	36,438
Tax-exempt	15,001	13,313	43,421	37,541
Federal funds sold and other	1,429	4,634	5,258	11,325
Total interest income	249,188	275,749	763,995	799,483
Interest expense:
Deposits	28,401	62,531	112,826	175,736
Securities sold under agreements to repurchase	77	152	286	439
Federal Home Loan Bank advances and other borrowings	14,116	17,260	50,080	51,338
Total interest expense	42,594	79,943	163,192	227,513
Net interest income	206,594	195,806	600,803	571,970
Provision for credit losses	16,333	8,260	184,554	22,639
Net interest income after provision for credit losses	190,261	187,546	416,249	549,331
Noninterest income:
Total noninterest income	91,065	82,619	234,396	204,364
Noninterest expense:
Salaries and employee benefits	90,103	85,919	244,470	231,915
Equipment and occupancy	21,622	20,348	64,626	63,523
Other real estate expense, net	1,795	655	7,098	3,424
Marketing and other business development	2,321	2,723	7,714	8,953
Postage and supplies	1,761	1,766	5,821	5,737
Amortization of intangibles	2,417	2,430	7,416	7,012
Other noninterest expense	24,258	19,100	76,086	54,114
Total noninterest expense	144,277	132,941	413,231	374,678
Income before income taxes	137,049	137,224	237,414	379,017
Income tax expense	26,404	26,703	35,969	74,215
Net income	110,645	110,521	201,445	304,802
Preferred stock dividends	(3,798)	0	(3,798)	0
Net income available to common shareholders	$ 106,847	$ 110,521	$ 197,647	$ 304,802
Per share information:
Basic net income per common share (in dollars per share)	$ 1.42	$ 1.45	$ 2.62	$ 3.99
Diluted net income per common share (in dollars per share)	$ 1.42	$ 1.44	$ 2.62	$ 3.97
Weighted average common shares outstanding:
Basic (in shares)	75,240,664	76,301,010	75,417,663	76,480,757
Diluted (in shares)	75,360,033	76,556,309	75,544,677	76,761,167
Service charges on deposit accounts
Noninterest income:
Total noninterest income	$ 9,854	$ 10,193	$ 25,796	$ 27,675
Investment services
Noninterest income:
Total noninterest income	6,734	6,270	21,944	17,607
Insurance sales commissions
Noninterest income:
Total noninterest income	2,284	2,252	7,755	7,327
Gain on mortgage loans sold, net
Noninterest income:
Total noninterest income	19,453	7,402	47,655	18,291
Investment gains (losses) on sales, net
Noninterest income:
Total noninterest income	651	417	986	(6,009)
Trust fees
Noninterest income:
Total noninterest income	3,986	3,593	12,114	10,349
Income from equity method investment
Noninterest income:
Total noninterest income	26,445	32,248	59,245	77,799
Other noninterest income
Noninterest income:
Total noninterest income	$ 21,658	$ 20,244	$ 58,901	$ 51,325

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income	$ 110,645,000	$ 110,521,000	$ 201,445,000	$ 304,802,000
Other comprehensive income (loss), net of tax:
Change in fair value on available-for-sale securities, net of tax	523,000	25,259,000	69,402,000	87,153,000
Change in fair value of cash flow hedges, net of tax	(5,213,000)	494,000	60,426,000	6,584,000
Amortization (accretion) of net unrealized losses (gains) on securities transferred from available-for-sale to held-to-maturity, net of tax	(1,523,000)	56,000	(3,504,000)	126,000
Net loss on cash flow hedges reclassified from other comprehensive income into net income, net of tax	156,000	1,129,000	1,858,000	946,000
Net loss (gain) on sale of investment securities reclassified from other comprehensive income into net income, net of tax	(481,000)	(308,000)	(728,000)	4,438,000
Total other comprehensive income (loss), net of tax	(6,538,000)	26,630,000	127,454,000	99,247,000
Total comprehensive income	$ 104,107,000	$ 137,151,000	$ 328,899,000	$ 404,049,000

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comp. Income (Loss), net	Accounting Standards Update 2016-13	Accounting Standards Update 2016-13Retained Earnings
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 & related tax benefits	130		$ 5	125
Exercise of employee common stock options and related tax benefits (in shares)			5,000
Common dividends paid	(12,545)				(12,545)
Repurchase of common stock	(30,049)		$ (543)	(29,506)
Repurchase of common stock (in shares)			(543,000)
Issuance of restricted common shares, net of forfeitures	0		$ 180	(180)
Issuance of restricted common shares, net of forfeitures (in shares)			180,000
Restricted shares withheld for taxes & related benefits	(3,487)		$ (62)	(3,425)
Restricted shares withheld for taxes (in shares)			(62,000)
Stock-based compensation expense	4,913			4,913
Net income	93,960				93,960
Other comprehensive income (loss)	37,077					37,077
Balance at Mar. 31, 2019	4,055,939		$ 77,064	3,079,358	914,545	(15,028)
Balance (in shares) at Mar. 31, 2019			77,064,000
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]
Stock-based compensation expense	15,091
Net income	304,802
Other comprehensive income (loss)	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 Mar. 31, 2019	4,055,939		$ 77,064	3,079,358	914,545	(15,028)
Balance (in shares) at Mar. 31, 2019			77,064,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options & related tax benefits	9		$ 1	8
Exercise of employee common stock options and related tax benefits (in shares)			1,000
Common dividends paid	(12,432)				(12,432)
Repurchase of common stock	(7,375)		$ (132)	(7,243)
Repurchase of common stock (in shares)			(132,000)
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 benefits	(801)		$ (14)	(787)
Restricted shares withheld for taxes (in shares)			(14,000)
Stock-based compensation expense	5,160			5,160
Net income	100,321				100,321
Other comprehensive income (loss)	35,540					35,540
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
Common Stock, Dividends, Per Share, Cash Paid	$ 0.16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options & 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 benefits	(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
Balance at Dec. 31, 2019	4,355,748		$ 76,564	3,064,467	1,184,183	30,534
Balance (in shares) at Dec. 31, 2019			76,564,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options & related tax benefits	5		$ 1	4
Exercise of employee common stock options and related tax benefits (in shares)			1,000
Common dividends paid	(12,442)				(12,442)
Repurchase of common stock	(50,790)		$ (1,015)	(49,775)
Repurchase of common stock (in shares)			(1,015,000)
Issuance of restricted common shares, net of forfeitures	0		$ 198	(198)
Issuance of restricted common shares, net of forfeitures (in shares)			198,000
Restricted shares withheld for taxes & related benefits	(1,957)		$ (32)	(1,925)
Restricted shares withheld for taxes (in shares)			(32,000)
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes & related tax benefits	2,469		$ 84	(2,553)
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes and related tax benefit (in shares)			84,000
Stock-based compensation expense	5,501			5,501
Net income	28,356				28,356
Cumulative effect of change in accounting principle							$ (31,796)	$ (31,796)
Other comprehensive income (loss)	94,972					94,972
Balance at Mar. 31, 2020	4,385,128		$ 75,800	3,015,521	1,168,301	125,506
Balance (in shares) at Mar. 31, 2020			75,800,000
Balance at Dec. 31, 2019	4,355,748		$ 76,564	3,064,467	1,184,183	30,534
Balance (in shares) at Dec. 31, 2019			76,564,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	14,092
Net income	201,445
Other comprehensive income (loss)	127,454
Balance at Sep. 30, 2020	4,787,308	$ 217,126	$ 75,835	3,023,430	1,312,929	157,988
Balance (in shares) at Sep. 30, 2020			75,835,000
Balance at Mar. 31, 2020	4,385,128		$ 75,800	3,015,521	1,168,301	125,506
Balance (in shares) at Mar. 31, 2020			75,800,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of preferred stock, net of issuance costs	217,632	217,632
Exercise of employee common stock options & related tax benefits	225		$ 9	216
Exercise of employee common stock options and related tax benefits (in shares)			9,000
Common dividends paid	(12,378)				(12,378)
Issuance of restricted common shares, net of forfeitures	0		$ 38	(38)
Issuance of restricted common shares, net of forfeitures (in shares)			38,000
Restricted shares withheld for taxes & related benefits	(553)		$ (13)	(540)
Restricted shares withheld for taxes (in shares)			(13,000)
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes & related tax benefits	19		$ 2	(21)
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes and related tax benefit (in shares)			2,000
Stock-based compensation expense	4,148			4,148
Net income	62,444				62,444
Other comprehensive income (loss)	39,020					39,020
Balance at Jun. 30, 2020	$ 4,695,647	217,632	$ 75,836	3,019,286	1,218,367	164,526
Balance (in shares) at Jun. 30, 2020			75,836,000
Common Stock, Dividends, Per Share, Cash Paid	$ 0.16
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of preferred stock, net of issuance costs	$ (506)	(506)
Preferred dividends paid	3,798				3,798
Common dividends paid	(12,285)				(12,285)
Issuance of restricted common shares, net of forfeitures	0		$ 6	(6)
Issuance of restricted common shares, net of forfeitures (in shares)			6,000
Restricted shares withheld for taxes & related benefits	(300)		$ (7)	(293)
Restricted shares withheld for taxes (in shares)			(7,000)
Stock-based compensation expense	4,443			4,443
Net income	110,645				110,645
Other comprehensive income (loss)	(6,538)					(6,538)
Balance at Sep. 30, 2020	$ 4,787,308	$ 217,126	$ 75,835	$ 3,023,430	$ 1,312,929	$ 157,988
Balance (in shares) at Sep. 30, 2020			75,835,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income	$ 201,445	$ 304,802
Adjustments to reconcile net income to net cash provided by operating activities:
Net amortization/accretion of premium/discount on securities	26,771	14,365
Depreciation, amortization and accretion	32,127	4,365
Provision for credit losses	184,554	22,639
Gain on mortgage loans sold, net	(47,655)	(18,291)
Investment losses (gains) on sales, net	(986)	6,009
Stock-based compensation expense	14,092	15,091
Deferred tax expense (benefit)	(31,288)	5,355
Losses on dispositions of other real estate and other investments	6,600	2,612
Income from equity method investment	(59,245)	(77,799)
Dividends received from equity method investment	47,981	49,940
Excess tax benefit from stock compensation	(505)	(832)
Gain (Loss) on Sale of Loans and Leases	1,856	2,841
Increase in other assets	(188,675)	(79,462)
Increase in other liabilities	64,488	91,624
Net cash provided by operating activities	301,725	314,504
Activities in securities available-for-sale:
Purchases	(1,189,922)	(1,039,225)
Sales	145,631	626,097
Maturities, prepayments and calls	356,690	253,350
Activities in securities held-to-maturity:
Purchases	0	(3,822)
Maturities, prepayments and calls	13,345	7,800
Increase in loans, net	(2,705,594)	(1,488,436)
Purchases of software, premises and equipment	(30,309)	(34,190)
Proceeds from sales of software, premises and equipment	0	66
Proceeds from sale of other real estate	7,191	4,947
Purchase of bank owned life insurance policies	0	(110,000)
Proceeds from bank owned life insurance settlements	4,580	308
Proceeds from Derivative Instrument	35,680
Payments for Derivative Instrument		(37,982)
Purchase of trade name	(1,000)	0
Increase in other investments	(50,335)	(43,260)
Net cash used in investing activities	(3,414,043)	(1,908,941)
Financing activities:
Net increase in deposits	6,363,187	1,152,021
Net increase (decrease) in securities sold under agreements to repurchase	705	(9,339)
Advances from Federal Home Loan Bank:
Federal Home Loan Bank: Advances, net of restructuring charges	762,472	2,572,500
Federal Home Loan Bank: Repayments/maturities	(1,537,520)	(1,963,541)
Advances of other borrowings, net of issuance costs	56,568	316,200
Repayments of other borrowings	(136,661)	(184,175)
Principal payments of finance lease obligation	(180)	(168)
Issuance of preferred stock, net of issuance costs	217,126	0
Issuance of common stock pursuant to restricted stock unit agreement, net of shares withheld for taxes	(2,488)	0
Exercise of common stock options, net of repurchase of restricted shares	(2,580)	(4,546)
Repurchase of common stock	(50,790)	(48,489)
Common stock dividends paid	(37,105)	(37,415)
Preferred stock dividends paid	(3,798)	0
Net cash provided by financing activities	5,628,936	1,793,048
Net increase in cash, cash equivalents, and restricted cash	2,516,618	198,611
Cash, cash equivalents, and restricted cash, beginning of period	526,707	721,692
Cash, cash equivalents, and restricted cash, end of period	3,043,325	920,303
Commercial loans held for sale:
Adjustments to reconcile net income to net cash provided by operating activities:
Loans held-for-sale originated	(271,996)	(315,454)
Loans held-for-sale sold	279,147	312,936
Consumer loans held for sale:
Adjustments to reconcile net income to net cash provided by operating activities:
Loans held-for-sale originated	(1,550,290)	(1,001,377)
Loans held-for-sale sold	$ 1,597,016	$ 980,822

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2020
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 company that primarily serves as a full-service commercial loan provider 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 12 primarily urban markets within Tennessee, the Carolinas, Virginia and beginning in December 2019, Atlanta, Georgia. On July 2, 2019, Pinnacle Bank acquired all of the outstanding stock of Advocate Capital, Inc. (Advocate Capital) for a cash price of $59.0 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. At the acquisition date, Advocate Capital's net assets were recorded at a fair value of approximately $45.6 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 were finalized during the second quarter of 2020. 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, 2019 (2019 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. 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 credit losses and determination of any impairment of goodwill or intangible assets. It is reasonably possible Pinnacle Financial's estimate of the allowance for credit losses and determination of impairment of goodwill or intangible assets could change as a result of the continued impact of the COVID-19 pandemic on the economy. The resulting change in these estimates could be material to Pinnacle Financial's consolidated financial statements. There have been no significant changes to Pinnacle Financial's significant accounting policies as disclosed in the 2019 10-K other than those that relate to the allowance for credit losses upon adoption of ASU 2016-13 as described later within Note 1. Cash Flow Information — Supplemental cash flow information addressing certain cash and noncash transactions for the nine months ended September 30, 2020 and 2019 was as follows (in thousands): For the nine months ended 2020 2019 Cash Transactions: Interest paid $ 179,163 $ 216,261 Income taxes paid, net 89,858 61,238 Operating lease payments 10,077 10,193 Noncash Transactions: Loans charged-off to the allowance for credit losses 35,724 21,328 Loans foreclosed upon and transferred to other real estate owned 3,435 16,870 Loans foreclosed upon and transferred to other assets 25 93 Fixed assets transferred to other real estate owned — 5,126 Available-for-sale securities transferred to held-to-maturity portfolio 873,613 — Right-of-use asset recognized during the period in exchange for lease obligations (1) 5,269 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 available to common shareholders 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 common share calculations for the three and nine months ended September 30, 2020 and 2019 (in thousands, except per share data): Three months ended Nine months ended 2020 2019 2020 2019 Basic net income per common share calculation: Numerator - Net income available to common shareholders $ 106,847 $ 110,521 $ 197,647 $ 304,802 Denominator - Weighted average common shares outstanding 75,241 76,301 75,418 76,481 Basic net income per common share $ 1.42 $ 1.45 $ 2.62 $ 3.99 Diluted net income per common share calculation: Numerator – Net income available to common shareholders $ 106,847 $ 110,521 $ 197,647 $ 304,802 Denominator - Weighted average common shares outstanding 75,241 76,301 75,418 76,481 Dilutive common shares contingently issuable 119 255 127 280 Weighted average diluted common shares outstanding 75,360 76,556 75,545 76,761 Diluted net income per common share $ 1.42 $ 1.44 $ 2.62 $ 3.97 Allowance for Credit Losses - Loans - As described below under Recently Adopted Accounting Pronouncements, Pinnacle Financial adopted FASB ASC 326 effective January 1, 2020, which requires the estimation of an allowance for credit losses in accordance with the current expected credit loss (CECL) methodology. Pinnacle Financial's management assesses the adequacy of the allowance on a quarterly basis. This assessment includes procedures to estimate the allowance and test the adequacy and appropriateness of the resulting balance. The level of the allowance is based upon management's evaluation of historical default and loss experience, current and projected economic conditions, asset quality trends, known and inherent risks in the portfolio, adverse situations that may affect the borrowers' ability to repay a loan (including the timing of future payments), the estimated value of any underlying collateral, composition of the loan portfolio, industry and peer bank loan quality indications and other pertinent factors, including regulatory recommendations. The level of the allowance for credit losses maintained by management is believed adequate to absorb all expected future losses inherent in the loan portfolio at the balance sheet date. The allowance is increased through provision for credit losses and decreased by charge-offs, net of recoveries of amounts previously charged-off. The allowance for credit losses is measured on a collective basis for pools of loans with similar risk characteristics. Pinnacle Financial has identified the following pools of financial assets with similar risk characteristics for measuring expected credit losses: • Owner occupied commercial real estate mortgage loans - Owner occupied commercial real estate mortgage loans are secured by commercial office buildings, industrial buildings, warehouses or retail buildings where the owner of the building occupies the property. For such loans, repayment is largely dependent upon the operation of the borrower's business. • Non-owner occupied commercial real estate loans - These loans represent investment real estate loans secured by office buildings, industrial buildings, warehouses, retail buildings, and multifamily residential housing. Repayment is primarily dependent on lease income generated from the underlying collateral. • 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. Repayment is primarily dependent on the personal cash flow of the borrower. • Construction and land development loans - Construction and land development loans include loans where the repayment is dependent on the successful completion and eventual sale, refinance or 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. These loans are generally secured by equipment, inventory, and accounts receivable of the borrower and repayment is primarily dependent on business cash flows. • 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, consumer credit cards and loans to finance education, among others. Many consumer loans are unsecured. Repayment is primarily dependent on the personal cash flow of the borrower. For commercial real estate, consumer real estate, construction and land development, and commercial and industrial loans, Pinnacle Financial primarily utilizes a probability of default (PD) and loss given default (LGD) modeling approach. These models utilize historical correlations between default experience and certain macroeconomic factors as determined through a statistical regression analysis. All loan segments modeled using this approach consider changes in the national unemployment rate. In addition to the national unemployment rate, gross domestic product and the three month treasury rate are considered for owner occupied commercial real estate, the commercial real estate price index and the five year treasury rate are considered for construction loans, and the three month treasury rate is considered for commercial and industrial loans. Projections of these macroeconomic factors, obtained from an independent third party, are utilized to predict quarterly rates of default based on the statistical PD models. The predicted quarterly default rates are then applied to the estimated future exposure at default (EAD), as determined based on contractual amortization terms and estimated prepayments. An estimated LGD, determined based on historical loss experience, is applied to the quarterly defaulted balances for each loan segment to estimate future losses of the loan's amortized cost. Losses are predicted over a period of time determined to be reasonable and supportable, and at the end of the reasonable and supportable period losses are reverted to long term historical averages. The reasonable and supportable period and reversion period are re-evaluated each quarter by Pinnacle Financial and are dependent on the current economic environment among other factors. Upon implementation of CECL on January 1, 2020 and at September 30, 2020, a reasonable and supportable period of eighteen months was utilized for all loan segments, followed by a twelve month straight line reversion to long term averages. For the consumer and other loan segment, a loss rate approach is utilized. For these loans, historical charge off rates are applied to projected future balances, as determined in the same manner as EAD for the statistically modeled loan segments. For credit cards, which have no amortization terms or contractual maturities and are unconditionally cancellable, future balances are estimated based on expected payment volume applied to the current balance. The estimated loan losses for all loan segments are adjusted for changes in qualitative factors not inherently considered in the quantitative analyses. The qualitative categories and the measurements used to quantify the risks within each of these categories are subjectively selected by management, but measured by objective measurements period over period. The data for each measurement may be obtained from internal or external sources. The current period measurements are evaluated and assigned a factor commensurate with the current level of risk relative to past measurements over time. The resulting qualitative adjustments are applied to the relevant collectively evaluated loan portfolios. These adjustments are based upon quarterly trend assessments in portfolio concentrations, policy exceptions, associate retention, independent loan review results, collateral considerations, risk ratings, competition and peer group credit quality trends. The qualitative allowance allocation, as determined by the processes noted above, is increased or decreased for each loan segment based on the assessment of these various qualitative factors. Loans that do not share similar risk characteristics with the collectively evaluated pools are evaluated on an individual basis and are excluded from the collectively evaluated pools. Individual evaluations are generally performed for loans greater than $1.0 million which have experienced significant credit deterioration. Such loans are evaluated for credit losses based on either discounted cash flows or the fair value of collateral. When management determines that foreclosure is probable, expected credit losses are based on the fair value of the collateral, less selling costs. For loans for which foreclosure is not probable, but for which repayment is expected to be provided substantially through the operation or sale of the collateral, Pinnacle Financial has elected the practical expedient under ASC 326 to estimate expected credit losses based on the fair value of collateral, with selling costs considered in the event sale of the collateral is expected. Loans for which terms have been modified in a troubled debt restructuring (TDR) are evaluated using these same individual evaluation methods. In the event the discounted cash flow method is used for a TDR, the original interest rate is used to discount expected cash flows. In assessing the adequacy of the allowance for credit losses, Pinnacle Financial considers the results of Pinnacle Financial's ongoing independent loan review process. Pinnacle Financial undertakes this process both to ascertain those loans in the portfolio with elevated credit risk and to assist in its overall evaluation of the risk characteristics of the entire loan portfolio. Its loan review process includes the judgment of management, independent internal loan reviewers and reviews that may have been conducted by third-party reviewers including regulatory examiners. Pinnacle Financial incorporates relevant loan review results in the allowance. In accordance with CECL, losses are estimated over the remaining contractual terms of loans, adjusted for prepayments. The contractual term excludes expected extensions, renewals and modifications unless management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed or such renewals, extensions or modifications are included in the original loan agreement and are not unconditionally cancellable by Pinnacle Financial. Credit losses are estimated on the amortized cost basis of loans, which includes the principal balance outstanding, purchase discounts and premiums, deferred loan fees and costs and accrued interest receivable. Accrued interest receivable is presented separately on the balance sheets and as allowed under ASU 2016-13 is excluded from the tabular loan disclosures in Note 4. While policies and procedures used to estimate the allowance for credit losses, as well as the resultant provision for credit losses charged to income, are considered adequate by management and are reviewed periodically by regulators, model validators and internal audit, they are necessarily approximate and imprecise. There are factors beyond Pinnacle Financial's control, such as changes in projected economic conditions, real estate markets or particular industry conditions which may materially impact asset quality and the adequacy of the allowance for credit losses and thus the resulting provision for credit losses. Allowance for Credit Losses on Off Balance Sheet Credit Exposures - Pinnacle Financial estimates expected credit losses over the contractual term of obligations to extend credit, unless the obligation is unconditionally cancellable. The allowance for off balance sheet exposures is adjusted through other noninterest expense. The estimates are determined based on the likelihood of funding during the contractual term and an estimate of credit losses subsequent to funding. Estimated credit losses on subsequently funded balances are based on the same assumptions as used to estimated credit losses on existing funded loans. Allowance for Credit Losses - Securities Held-to-Maturity - Expected credit losses on debt securities classified as held-to-maturity are measured on a collective basis by major security type. The estimates of expected credit losses are based on historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. The models rely on regression analyses to predict PD based on projected macroeconomic factors, including unemployment rates and GDP, among others. At September 30, 2020, Pinnacle Financial's held-to-maturity securities consisted entirely of municipal securities rated A or higher by the ratings agencies. A reasonable and supportable period of 18 months and reversion period of 12 months is utilized to estimate credit losses on held-to-maturity municipal securities. The allowance is increased through provision for credit losses and decreased by charge-offs, net of recoveries of amounts previously charged-off. Allowance for Credit Losses - Securities Available-for-Sale - For any securities classified as available-for-sale that are in an unrealized loss position at the balance sheet date, Pinnacle Financial assesses whether or not it intends to sell the security, or more likely than not will be required to sell the security, before recovery of its amortized cost basis. If either criteria is met, the security's amortized cost basis is written down to fair value through net income. If neither criteria is met, Pinnacle Financial evaluates whether any portion of the decline in fair value is the result of credit deterioration. Such evaluations consider the extent to which the amortized cost of the security exceeds its fair value, changes in credit ratings and any other known adverse conditions related to the specific security. If the evaluation indicates that a credit loss exists, an allowance for credit losses is recorded through provisions for credit losses for the amount by which the amortized cost basis of the security exceeds the present value of cash flows expected to be collected, limited by the amount by which the amortized cost exceeds fair value. Any impairment not recognized in the allowance for credit losses is recognized in other comprehensive income. Recently Adopted Accounting Pronouncements — 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 became effective for Pinnacle Financial on January 1, 2020. Pinnacle Financial performed its annual assessment of goodwill as of September 30, 2020. No impairment charge was identified as a result of the assessment. In June 2016, the FASB issued Accounting Standards Update 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments (Topic 326), and has issued subsequent amendments thereto, which introduces the current expected credit losses (CECL) methodology. Among other things, ASC 326 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 requires institutions to calculate all probable and estimable losses that are expected to be incurred through the financial asset's contractual life through a provision for credit losses, including loans obtained as a result of any acquisition not deemed to be purchased credit deteriorated (PCD). ASC 326 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 determined at acquisition is added to the purchase price rather than recorded as provision expense. In accordance with ASC 326, the disclosure of credit quality indicators related to the amortized cost of financing receivables is further disaggregated by year of origination (or vintage). Pinnacle Financial adopted ASU 2016-13 and all subsequent amendments thereto effective January 1, 2020 using the modified retrospective method for all financial assets measured at amortized cost and off balance sheet credit exposures. Amounts for periods beginning on or after January 1, 2020 are presented under ASC 326 and all prior period information is presented in accordance with previously applicable GAAP. At January 1, 2020, Pinnacle Financial recognized a cumulative adjustment to retained earnings of $31.8 million, net of tax, attributable to an increase in the allowance for credit losses of $34.3 million, an increase in the allowance for off balance sheet credit exposures of $8.8 million, and an increase in deferred tax assets of $11.3 million. In addition, an allowance of $3.8 million was recognized on loans purchased with credit deterioration (PCD) previously classified as purchased credit impaired (PCI) with a corresponding adjustment to the gross carrying amount of the loans. Pinnacle Financial adopted ASC 326 using the prospective transition approach for PCD loans, which did not require re-evaluation of whether loans previously classified as PCI loans met the criteria of PCD assets at the date of adoption. The remaining noncredit discount will be accreted into interest income at the effective interest rate as of January 1, 2020. Newly Issued Not Yet Effective Accounting Standards — In March 2020, the FASB issued Accounting Standards Update 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides temporary optional guidance to ease the potential burden in accounting for reference rate reform. The ASU provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. It is intended to help stakeholders during the global market-wide reference rate transition period. The guidance is effective for all entities as of March 12, 2020 through December 31, 2022. Pinnacle Financial is implementing a transition plan to identify and modify its loans and other financial instruments, including certain indebtedness, with attributes that are either directly or indirectly influenced by LIBOR. Pinnacle Financial is assessing ASU 2020-04 and its impact on the transition away from LIBOR for its loans and other financial instruments. In January 2020, the FASB issued Accounting Standards Update 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) - Clarifying the Interactions between Topic 321, Topic 323, and Topic 815. These amendments, among other things, clarify that a company should consider observable transactions that require a company to either apply or discontinue the equity method of accounting under Topic 323, Investments-Equity Method and Joint Ventures, for the purposes of applying the measurement alternative in accordance with Topic 321 immediately before applying or upon discontinuing the equity method. The amendments also clarify that, when determining the accounting for certain forward contracts and purchased options a company should not consider, whether upon settlement or exercise, if the underlying securities would be accounted for under the equity method or fair value option. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early application is permitted, including early adoption in an interim period. An entity should apply ASU 2020-01 prospectively at the beginning of the interim period that includes the adoption date. Pinnacle Financial is assessing ASU 2020-01 and its impact on its accounting and disclosures. In December 2019, the FASB issued Accounting Standards Update No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes to simplify various aspects of the current guidance to promote consistent application of the standard among reporting entities by moving certain exceptions to the general principles. The amendments are effective for fiscal years beginning after December 15, 2020, with early adoption permitted. Pinnacle Financial does not plan to adopt this standard early. 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. 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, 2020 through the date of the issued financial statements.

Equity method investment

Equity method investment	9 Months Ended
	Sep. 30, 2020
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, 2020 and December 31, 2019 and results of operations as of and for the three and nine months ended September 30, 2020 and 2019, were as follows (in thousands): As of September 30, 2020 December 31, 2019 Assets $ 1,249,530 $ 840,398 Liabilities 1,006,462 641,037 Equity interests 243,068 199,361 Total liabilities and equity $ 1,249,530 $ 840,398 For the three months ended For the nine months ended 2020 2019 2020 2019 Revenues $ 128,510 $ 108,770 $ 319,244 $ 279,569 Net income $ 51,459 $ 61,364 $ 121,604 $ 156,064 At September 30, 2020, technology, trade name and customer relationship intangibles, net of related amortization, totaled $7.9 million compared to $8.8 million as of December 31, 2019. Amortization expense of $293,000 and $880,000, respectively, was included for the three and nine months ended September 30, 2020 compared to $475,000 and $1.4 million, respectively, for the same periods in the prior year. Accretion income of $535,000 and $1.6 million, respectively, was included in the three and nine months ended September 30, 2020 compared to $630,000 and $2.0 million, respectively, for the same periods in the prior year. During the three months and nine months ended September 30, 2020, Pinnacle Financial and Pinnacle Bank received dividends of $40.0 million and $48.0 million, respectively, from BHG in the aggregate. During the three and nine months ended September 30, 2019, Pinnacle Financial and Pinnacle Bank received dividends of $9.0 million and $49.9 million, respectively, in the aggregate. Earnings from BHG are included in Pinnacle Financial's consolidated tax return. Profits from intercompany transactions are eliminated. On September 21, 2020, Pinnacle Bank purchased $50.2 million of loans from BHG at par pursuant to BHG's joint venture loan program whereby BHG and Pinnacle share proportionately in the credit risk of the acquired loans based on the rate on the loan and the rate of the purchase. The yield on this portfolio to Pinnacle Bank is anticipated to be 5.0% per annum. No loans were purchased from BHG by Pinnacle Bank for the three and nine ended September 30, 2019.

Securities

Securities	9 Months Ended
	Sep. 30, 2020
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, 2020 and December 31, 2019 are summarized as follows (in thousands): Amortized Gross Gross Fair September 30, 2020: Securities available-for-sale: U.S. Treasury securities $ 84,438 $ 28 $ 2 $ 84,464 U.S. government agency securities 75,345 1,543 29 76,859 Mortgage-backed securities 1,634,329 69,311 2,428 1,701,212 State and municipal securities 1,324,383 31,081 27,743 1,327,721 Asset-backed securities 169,540 470 1,171 168,839 Corporate notes and other 106,638 1,063 3,374 104,327 $ 3,394,673 $ 103,496 $ 34,747 $ 3,463,422 Securities held-to-maturity: State and municipal securities $ 1,039,841 $ 23,814 $ 2,808 $ 1,060,847 $ 1,039,841 $ 23,814 $ 2,808 $ 1,060,847 Allowance for credit losses - securities held-to-maturity (191) Securities held-to-maturity, net of allowance for credit losses $ 1,039,650 December 31, 2019: Securities available-for-sale: U.S. Treasury securities $ 72,862 $ 19 $ 14 $ 72,867 U.S. government agency securities 80,096 306 710 79,692 Mortgage-backed securities 1,458,894 12,789 7,776 1,463,907 State and municipal securities 1,669,606 52,096 7,249 1,714,453 Asset-backed securities 153,963 302 1,293 152,972 Corporate notes and other 56,212 635 743 56,104 $ 3,491,633 $ 66,147 17,785 $ 3,539,995 Securities held-to-maturity: State and municipal securities $ 188,996 $ 12,221 $ — $ 201,217 $ 188,996 $ 12,221 $ — $ 201,217 During the first quarter of 2020, Pinnacle Financial transferred, at fair value, $873.6 million of municipal securities from the available-for-sale portfolio to the held-to-maturity portfolio. The related unrealized after tax gains of $69.0 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 transfer. At September 30, 2020, 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, 2020, repurchase agreements comprised of secured borrowings totaled $127.1 million and were secured by $127.1 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, 2020 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, 2020: Amortized Fair Amortized Fair Due in one year or less $ 85,090 $ 85,120 $ — $ — Due in one year to five years 12,059 12,446 1,409 1,482 Due in five years to ten years 175,812 181,102 7,209 7,293 Due after ten years 1,317,843 1,314,703 1,031,223 1,052,072 Mortgage-backed securities 1,634,329 1,701,212 — — Asset-backed securities 169,540 168,839 — — $ 3,394,673 $ 3,463,422 $ 1,039,841 $ 1,060,847 At September 30, 2020 and December 31, 2019, 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 Investments with an Unrealized Loss of Total Investments with an Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized At September 30, 2020 U.S. Treasury securities $ 25,973 $ 2 $ — $ — $ 25,973 $ 2 U.S. government agency securities 10,576 4 6,360 25 16,936 29 Mortgage-backed securities 138,532 1,746 39,350 682 177,882 2,428 State and municipal securities 199,365 3,608 539,131 24,676 738,496 28,284 Asset-backed securities 74,977 355 67,973 816 142,950 1,171 Corporate notes 26,309 174 22,880 3,200 49,189 3,374 Total temporarily-impaired securities $ 475,732 $ 5,889 $ 675,694 $ 29,399 $ 1,151,426 $ 35,288 At December 31, 2019 U.S. Treasury securities $ 40,505 $ 14 $ — $ — $ 40,505 $ 14 U.S. government agency securities 1,222 1 30,892 709 32,114 710 Mortgage-backed securities 458,881 5,102 163,767 2,674 622,648 7,776 State and municipal securities 204,958 1,938 244,884 5,311 449,842 7,249 Asset-backed securities 75,488 796 59,816 497 135,304 1,293 Corporate notes — — 16,908 743 16,908 743 Total temporarily-impaired securities $ 781,054 $ 7,851 $ 516,267 $ 9,934 $ 1,297,321 $ 17,785 The applicable dates for determining when securities were in an unrealized loss position were September 30, 2020 and December 31, 2019. 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, 2020 and December 31, 2019, 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, 2020, Pinnacle Financial had approximately $35.3 million in unrealized losses on $1.2 billion of securities. The unrealized losses associated with $873.6 million and $179.8 million of municipal securities transferred from the available-for-sale portfolio to the held-to-maturity portfolio during the quarters ended March 31, 2020 and September 30, 2018, respectively, represent unrealized losses since the date of purchase, independent of the impact associated with changes in the cost basis upon transfer between portfolios. As described in Note 1. Summary of Significant Accounting Policies , for any securities classified as available-for-sale that are in an unrealized loss position at the balance sheet date, Pinnacle Financial assesses whether or not it intends to sell the security, or more likely than not will be required to sell the security, before recovery of its amortized cost basis which would require a write-down to fair value through net income. Because Pinnacle Financial currently does not intend to sell those securities that have an unrealized loss at September 30, 2020, 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 has determined that no write-down is necessary. In addition, Pinnacle Financial evaluates whether any portion of the decline in fair value is the result of credit deterioration, which would require the recognition of an allowance for credit losses. Such evaluations consider the extent to which the amortized cost of the security exceeds its fair value, changes in credit ratings and any other known adverse conditions related to the specific security. The unrealized losses associated with securities at September 30, 2020 are driven by changes in interest rates and are not due to the credit quality of the securities, and accordingly, no allowance for credit losses is considered necessary related to available-for-sale securities at September 30, 2020. These securities will continue to be monitored as a part of Pinnacle Financial's ongoing evaluation of credit quality. 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. The allowance for credit losses on held-to-maturity securities is measured on a collective basis by major security type as described in Note 1. Summary of Significant Accounting Policies . At September 30, 2020, Pinnacle Financial's held-to-maturity securities consist entirely of municipal securities. A reasonable and supportable period of 18 months and reversion period of 12 months was utilized to estimate credit losses on held-to-maturity municipal securities at September 30, 2020. With the implementation of CECL effective January 1, 2020, estimated credit losses on held-to-maturity municipal securities totaled approximately $10,000. At September 30, 2020, the estimated allowance for credit losses on these securities increased to $191,000, with the increase driven largely by changes in macroeconomic projections. Pinnacle Financial utilizes bond credit ratings assigned by third party ratings agencies to monitor the credit quality of debt securities held-to-maturity. At September 30, 2020, all debt securities classified as held-to-maturity were rated A or higher by the ratings agencies. Updated credit ratings are obtained as they become available from the ratings agencies. 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 nine months ended September 30, 2020, available-for-sale securities of approximately $145.6 million were sold and net unrealized gains, net of tax, of $728,000 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 Credit

Loans and Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Loans and Allowance for Credit Losses	Note 4. Loans and Allowance for Credit 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 the following loan categories for presentation of loan balances and the related allowance for credit losses on loans: • Owner occupied commercial real estate mortgage loans - Owner occupied commercial real estate mortgage loans are secured by commercial office buildings, industrial buildings, warehouses or retail buildings where the owner of the building occupies the property. For such loans, repayment is largely dependent upon the operation of the borrower's business. • Non-owner occupied commercial real estate loans - These loans represent investment real estate loans secured by office buildings, industrial buildings, warehouses, retail buildings, and multifamily residential housing. Repayment is primarily dependent on lease income generated from the underlying collateral. • 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. Repayment is primarily dependent on the personal cash flow of the borrower. • Construction and land development loans - Construction and land development loans include loans where the repayment is dependent on the successful completion and eventual sale, refinance or 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. These loans are generally secured by equipment, inventory, and accounts receivable of the borrower and repayment is primarily dependent on business cash flows. Loans amounting to $2.3 billion which were granted under the Paycheck Protection Program are included in this category. • 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, consumer credit cards and loans to finance education, among others. Many consumer loans are unsecured. Repayment is primarily dependent on the personal cash flow of the borrower. Loans at September 30, 2020 and December 31, 2019 were as follows: September 30, 2020 December 31, 2019 Commercial real estate: Owner occupied $ 2,748,075 $ 2,669,766 Non-owner occupied 5,220,452 5,039,452 Consumer real estate – mortgage 3,041,019 3,068,625 Construction and land development 2,728,439 2,430,483 Commercial and industrial 8,395,963 6,290,296 Consumer and other 343,461 289,254 Subtotal $ 22,477,409 $ 19,787,876 Allowance for credit losses (288,645) (94,777) Loans, net $ 22,188,764 $ 19,693,099 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 multiple ratings categories representing varying degrees of risk attributes lesser than those of the other defined risk categories further described below. Pinnacle Financial believes its categories follow those used by Pinnacle Bank's primary regulators. At September 30, 2020, approximately 82% 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. Consumer loans that have been placed on nonaccrual but have not otherwise been assigned a risk rating are believed by management to share risk characteristics with loans rated substandard-nonaccrual and have been presented as such in Pinnacle Financial's risk rating disclosures. 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 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 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. Substantial credit risk review procedures have been performed during the nine months ended September 30, 2020 to assess the impacts of the COVID-19 pandemic on the loan portfolio, and the results of these procedures are reflected in Pinnacle Financial's risk rating disclosures as of September 30, 2020. Following are the definitions of the risk rating categories used by Pinnacle Financial. Pass rated loans include all credits other than those included within these categories: • 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 table below presents loan balances classified within each risk rating category by primary loan type and based on year of origination as of September 30, 2020 (in thousands): September 30, 2020 2020 2019 2018 2017 2016 Prior Revolving Loans Total Commercial real estate- owner occupied Pass $ 514,127 $ 473,410 $ 497,269 $ 347,792 $ 368,441 $ 304,692 $ 79,208 $ 2,584,939 Special Mention 3,349 11,949 23,805 12,775 3,901 5,698 — 61,477 Substandard (1) 21,725 6,251 7,828 15,991 8,986 2,119 28,134 91,034 Substandard-nonaccrual 901 155 989 1,463 1,720 3,592 1,805 10,625 Doubtful-nonaccrual — — — — — — — — Total Commercial real estate - owner occupied $ 540,102 $ 491,765 $ 529,891 $ 378,021 $ 383,048 $ 316,101 $ 109,147 $ 2,748,075 Commercial real estate- Non-owner occupied Pass $ 1,011,392 $ 1,035,694 $ 765,605 $ 560,797 $ 509,620 $ 403,696 $ 54,308 $ 4,341,112 Special Mention 165,690 120,702 121,523 157,652 144,731 128,007 11,028 849,333 Substandard (1) 6,696 1,495 5,699 6,120 1,015 2,972 — 23,997 Substandard-nonaccrual — 437 745 139 840 3,849 — 6,010 Doubtful-nonaccrual — — — — — — — — Total Commercial real estate - Non-owner occupied $ 1,183,778 $ 1,158,328 $ 893,572 $ 724,708 $ 656,206 $ 538,524 $ 65,336 $ 5,220,452 Consumer real estate – mortgage Pass $ 462,452 $ 539,068 $ 372,363 $ 183,725 $ 142,646 $ 341,108 $ 955,781 $ 2,997,143 Special Mention 102 2,695 2,929 644 — 1,040 8,739 16,149 Substandard (1) — 546 — 895 9 2,274 2,108 5,832 Substandard-nonaccrual 169 1,677 1,003 1,426 2,627 11,027 3,966 21,895 Doubtful-nonaccrual — — — — — — — — Total Consumer real estate – mortgage $ 462,723 $ 543,986 $ 376,295 $ 186,690 $ 145,282 $ 355,449 $ 970,594 $ 3,041,019 Construction and land development Pass $ 849,025 $ 1,209,363 $ 471,069 $ 77,146 $ 20,229 $ 10,394 $ 15,858 $ 2,653,084 Special Mention 6,924 33,253 26,062 — 4,244 — — 70,483 Substandard (1) 619 681 29 — 240 150 — 1,719 Substandard-nonaccrual 391 554 77 83 — 2,048 — 3,153 Doubtful-nonaccrual — — — — — — — — Total Construction and land development $ 856,959 $ 1,243,851 $ 497,237 $ 77,229 $ 24,713 $ 12,592 $ 15,858 $ 2,728,439 Commercial and industrial Pass $ 3,566,925 $ 1,227,003 $ 779,760 $ 349,805 $ 149,094 $ 98,086 $ 1,946,224 $ 8,116,897 Special Mention 20,986 50,577 8,568 8,385 8,216 2,081 58,186 156,999 Substandard (1) 27,070 19,268 17,377 3,016 579 2,074 23,735 93,119 Substandard-nonaccrual 14,039 5,459 382 4,676 197 258 3,937 28,948 Doubtful-nonaccrual — — — — — — — — Total Commercial and industrial $ 3,629,020 $ 1,302,307 $ 806,087 $ 365,882 $ 158,086 $ 102,499 $ 2,032,082 $ 8,395,963 Consumer and other Pass $ 113,807 $ 23,974 $ 8,182 $ 8,379 $ 4,635 $ 2,142 $ 181,583 $ 342,702 Special Mention — — — — — — — — Substandard (1) — — — — — — — — Substandard-nonaccrual — — 2 7 12 2 736 759 Doubtful-nonaccrual — — — — — — — — Total Consumer and other $ 113,807 $ 23,974 $ 8,184 $ 8,386 $ 4,647 $ 2,144 $ 182,319 $ 343,461 September 30, 2020 2020 2019 2018 2017 2016 Prior Revolving Loans Total Total loans Pass $ 6,517,728 $ 4,508,512 $ 2,894,248 $ 1,527,644 $ 1,194,665 $ 1,160,118 $ 3,232,962 $ 21,035,877 Special Mention 197,051 219,176 182,887 179,456 161,092 136,826 77,953 1,154,441 Substandard (1) 56,110 28,241 30,933 26,022 10,829 9,589 53,977 215,701 Substandard-nonaccrual 15,500 8,282 3,198 7,794 5,396 20,776 10,444 71,390 Doubtful-nonaccrual — — — — — — — — Total loans $ 6,786,389 $ 4,764,211 $ 3,111,266 $ 1,740,916 $ 1,371,982 $ 1,327,309 $ 3,375,336 $ 22,477,409 The following table outlines the risk category of loans as of December 31, 2019 (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Total December 31, 2019 Pass $ 7,499,725 $ 3,019,203 $ 2,422,347 $ 6,069,757 $ 288,361 $ 19,299,393 Special Mention 51,147 13,787 2,816 79,819 698 148,267 Substandard (1) 139,518 10,969 3,042 125,035 47 278,611 Substandard-nonaccrual 18,828 24,666 2,278 15,685 148 61,605 Doubtful-nonaccrual — — — — — — Total loans $ 7,709,218 $ 3,068,625 $ 2,430,483 $ 6,290,296 $ 289,254 $ 19,787,876 (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 $215.7 million at September 30, 2020, compared to $276.0 million at December 31, 2019. The table below presents the aging of past due balances by loan segment at September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 30-59 days past due 60-89 days past due 90 days or more past due Total past due Current Total loans Commercial real estate: Owner-occupied $ 3,365 $ 415 $ 4,226 $ 8,006 $ 2,740,069 $ 2,748,075 Non-owner occupied 1,612 1,928 5,353 8,893 5,211,559 5,220,452 Consumer real estate – mortgage 7,852 1,338 5,971 15,161 3,025,858 3,041,019 Construction and land development 2,417 — 2,031 4,448 2,723,991 2,728,439 Commercial and industrial 6,615 4,743 4,986 16,344 8,379,619 8,395,963 Consumer and other 846 82 1,220 2,148 341,313 343,461 Total $ 22,707 $ 8,506 $ 23,787 $ 55,000 $ 22,422,409 $ 22,477,409 December 31, 2019 Commercial real estate: Owner-occupied $ 2,307 $ 2,932 $ 1,719 $ 6,958 $ 2,662,808 $ 2,669,766 Non-owner occupied 3,156 3,641 3,816 10,613 5,028,839 5,039,452 Consumer real estate – mortgage 11,646 2,157 7,304 21,107 3,047,518 3,068,625 Construction and land development 1,392 711 1,487 3,590 2,426,893 2,430,483 Commercial and industrial 8,474 2,478 6,364 17,316 6,272,980 6,290,296 Consumer and other 1,770 414 570 2,754 286,500 289,254 Total $ 28,745 $ 12,333 $ 21,260 $ 21,260 $ 62,338 $ 19,725,538 $ 19,787,876 The following table details the changes in the allowance for credit losses for the three and nine months ended September 30, 2020 and 2019, respectively, by loan classification (in thousands): Commercial real estate - Owner occupied Commercial real estate - Non-owner occupied Consumer Construction and land development Commercial and industrial Consumer Unallocated Total Three months ended September 30, 2020: Balance at June 30, 2020 $ 38,803 $ 68,426 $ 29,358 $ 41,897 $ 100,610 $ 6,278 $ — $ 285,372 Charged-off loans (186) (222) (907) — (12,984) (730) — (15,029) Recovery of previously charged-off loans 47 432 297 7 799 391 — 1,973 Provision for credit losses on loans (2,238) 1,223 3,201 (682) 13,783 1,042 — 16,329 Balance at September 30, 2020 $ 36,426 $ 69,859 $ 31,949 $ 41,222 $ 102,208 $ 6,981 $ — $ 288,645 Three months ended September 30, 2019: Balance at June 30, 2019 $ 12,174 $ 18,652 $ 8,489 $ 11,206 $ 37,436 $ 2,114 $ 182 $ 90,253 Charged-off loans (40) (62) (194) (14) (5,082) (1,388) — (6,780) Recovery of previously charged-off loans 135 74 901 97 407 300 — 1,914 Provision for credit losses on loans (112) 1,796 (1,426) 585 1,814 3,278 2,325 8,260 Balance at September 30, 2019 $ 12,157 $ 20,460 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 Nine months ended September 30, 2020: Balance at December 31, 2019 $ 13,406 $ 19,963 $ 8,054 $ 12,662 $ 36,112 $ 3,595 $ 985 $ 94,777 Impact of adopting ASC 326 264 (4,740) 21,029 (3,144) 23,040 2,638 (985) 38,102 Charged-off loans (1,247) (485) (3,033) — (27,982) (2,977) — (35,724) Recovery of previously charged-off loans 272 631 971 100 3,798 1,356 — 7,128 Provision for credit losses on loans 23,731 54,490 4,928 31,604 67,240 2,369 — 184,362 Balance at September 30, 2020 $ 36,426 $ 69,859 $ 31,949 $ 41,222 $ 102,208 $ 6,981 $ — $ 288,645 Nine months ended September 30, 2019: Balance at December 31, 2018 $ 11,297 $ 15,649 $ 7,670 $ 11,128 $ 31,731 $ 5,423 $ 677 $ 83,575 Charged-off loans (1,626) (75) (1,124) (18) (13,842) (4,643) — (21,328) Recovery of previously charged-off loans 211 962 1,642 238 4,749 959 — 8,761 Provision for credit losses on loans 2,275 3,924 (418) 526 11,937 2,565 1,830 22,639 Balance at September 30, 2019 $ 12,157 $ 20,460 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 The following table details the allowance for credit losses on loans and recorded investment in loans by loan classification and by impairment evaluation method as of December 31, 2019, as determined in accordance with ASC 310 prior to the adoption of ASU 2016-13 (in thousands): Commercial real estate - mortgage Consumer Construction and land development Commercial and industrial Consumer Unallocated Total December 31, 2019 Allowance for Loan Losses: Collectively evaluated for impairment $ 32,134 $ 6,762 $ 12,629 $ 35,401 $ 3,586 $ 90,512 Individually evaluated for impairment 1,235 1,292 33 711 9 3,280 Loans acquired with deteriorated credit quality (1) — — — — — — Total allowance for loan losses $ 33,369 $ 8,054 $ 12,662 $ 36,112 $ 3,595 $ 985 $ 94,777 Loans: Collectively evaluated for impairment $ 7,681,608 $ 3,036,922 $ 2,426,901 $ 6,274,280 $ 289,106 $ 19,708,817 Individually evaluated for impairment 18,122 25,018 561 14,295 148 58,144 Loans acquired with deteriorated credit quality 9,488 6,685 3,021 1,721 — 20,915 Total loans $ 7,709,218 $ 3,068,625 $ 2,430,483 $ 6,290,296 $ 289,254 $ 19,787,876 (1) Prior to the adoption of ASC 326 on January 1, 2020, an allowance for loan losses was recorded on loans acquired with deteriorated credit quality only in the event of additional credit deterioration subsequent to acquisition. The adequacy of the allowance for credit losses is reviewed by Pinnacle Financial's management on a quarterly basis. This assessment includes procedures to estimate the allowance and test the adequacy and appropriateness of the resulting balance. The level of the allowance is based upon management's evaluation of historical default and loss experience, current and projected economic conditions, asset quality trends, known and inherent risks in the portfolio, adverse situations that may affect the borrowers' ability to repay the loan (including the timing of future payment), the estimated value of any underlying collateral, composition of the loan portfolio, industry and peer bank loan quality indications and other pertinent factors, including regulatory recommendations. The level of the allowance for credit losses maintained by management is believed adequate to absorb all expected future losses inherent in the loan portfolio at the balance sheet date. The allowance is increased by provisions charged to expense and decreased by charge-offs, net of recoveries of amounts previously charged-off. As described in Note 1. Summary of Significant Accounting Policies , Pinnacle Financial adopted ASU 2016-13 on January 1, 2020, which introduced the CECL methodology for estimating all expected losses over the life of a financial asset. Under the CECL methodology the allowance for credit losses is measured on a collective basis for pools of loans with similar risk characteristics, and for loans that do not share similar risk characteristics with the collectively evaluated pools, evaluations are performed on an individual basis. For all loan segments collectively evaluated, losses are predicted over a period of time determined to be reasonable and supportable, and at the end of the reasonable and supportable period losses are reverted to long term historical averages. At September 30, 2020, Pinnacle Financial utilized a reasonable and supportable period of eighteen months for all loan segments, followed by a twelve month straight line reversion to long term averages. Upon adoption of ASU 2016-13, the opening balance of the allowance for credit losses was increased by $38.1 million through retained earnings. The additional increase during the nine months ended September 30, 2020 is primarily attributable to the change in projected economic conditions resulting from the COVID-19 pandemic, with elevated levels of the unemployment rate being the most significant driver. The following table presents the amortized cost basis of collateral dependent loans, which are individually evaluated to determine expected credit losses: September 30, 2020 Real Estate Business Assets Other Total Commercial real estate: Owner-occupied 14,955 — — 14,955 Non-owner occupied 11,294 — — 11,294 Consumer real estate – mortgage 27,122 — — 27,122 Construction and land development 4,362 — — 4,362 Commercial and industrial 2,052 28,692 45 30,789 Consumer and other — — 21 21 Total $ 59,785 $ 28,692 $ 66 $ 88,543 The table below presents the amortized cost basis of loans on nonaccrual status and loans past due 90 or more days and still accruing interest at September 30, 2020 and December 31, 2019. Also presented is the balance of loans on nonaccrual status at September 30, 2020 for which there was no related allowance for credit losses recorded (in thousands): September 30, 2020 December 31, 2019 Total nonaccrual loans Nonaccrual loans with no allowance for credit losses Loans past due 90 or more days and still accruing Total nonaccrual loans Loans past due 90 or more days and still accruing Commercial real estate: Owner-occupied $ 10,625 $ 5,704 $ — $ 11,654 $ — Non-owner occupied 6,010 — — 7,173 — Consumer real estate – mortgage 21,895 — 281 24,667 168 Construction and land development 3,152 1,152 — 2,278 — Commercial and industrial 28,948 7,960 563 15,685 946 Consumer and other 760 — 469 148 501 Total $ 71,390 $ 14,816 $ 1,313 $ 61,605 $ 1,615 Pinnacle Financial's policy is 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 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. Pinnacle Financial recognized no interest income from cash payments received on nonaccrual loans during the three and nine months ended September 30, 2020 and the three months ended September 30, 2019 compared to $176,000 during the nine months ended September 30, 2019, respectively. Had these nonaccruing loans been on accruing status, interest income would have been higher by $910,000 and $2.1 million for the three and nine months ended September 30, 2020, respectively, compared to $1.3 million and $3.5 million higher for the three and nine months ended September 30, 2019, respectively. Approximately $40.7 million and $35.8 million of nonaccrual loans as of September 30, 2020 and December 31, 2019, respectively, were performing pursuant to their contractual terms at those dates. The following table presents impaired loans at December 31, 2019 as determined under ASC 310 prior to the adoption of ASU 2016-13. Impaired loans generally include nonaccrual loans, troubled debt restructurings, and other loans deemed to be impaired but that continue to accrue interest. Presented are the recorded investment, unpaid principal balance and related allowance of impaired loans at December 31, 2019 by loan classification (in thousands): At December 31, 2019 Recorded investment Unpaid principal balances Related allowance Impaired loans with an allowance: Commercial real estate – mortgage $ 9,998 $ 10,983 $ 1,235 Consumer real estate – mortgage 20,996 23,105 1,292 Construction and land development 542 654 33 Commercial and industrial 4,074 5,381 711 Consumer and other 148 182 9 Total $ 35,758 $ 40,305 $ 3,280 Impaired loans without an allowance: Commercial real estate – mortgage $ 8,124 $ 8,891 $ — Consumer real estate – mortgage 4,022 4,021 — Construction and land development 19 17 — Commercial and industrial 10,221 11,322 — Consumer and other — — — Total $ 22,386 $ 24,251 $ — Total impaired loans $ 58,144 $ 64,556 $ 3,280 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, respectively, of impaired loans by loan classification as determined under ASC 310 prior to the adoption of ASU 2016-13 (in thousands): Three months ended Nine months ended Average recorded investment Interest income recognized Average recorded investment Interest income recognized Impaired loans with an allowance: Commercial real estate – mortgage $ 13,050 $ — $ 14,689 $ — Consumer real estate – mortgage 19,508 — 20,887 — Construction and land development 451 — 587 — Commercial and industrial 11,113 — 10,070 — Consumer and other 143 — 400 — Total $ 44,265 $ — $ 46,633 $ — Impaired loans without an allowance: Commercial real estate – mortgage $ 9,344 $ — $ 12,521 $ 176 Consumer real estate – mortgage 7,922 — 8,381 — Construction and land development 10 — 452 — Commercial and industrial 12,108 — 13,625 — Consumer and other — — — — Total $ 29,384 $ — $ 34,979 $ 176 Total impaired loans $ 73,649 $ — $ 81,612 $ 176 Prior to the adoption of ASU 2016-13, loans acquired with deteriorated credit quality, referred to under ASC 310-30 as purchased credit impaired loans and under ASU 2016-13 as purchased credit deteriorated loans, were assigned a credit related purchase discount and non-credit related purchase discount at acquisition. Upon adoption of ASU 2016-13 on January 1, 2020, the remaining credit related discount was re-classified to a component of the allowance for credit losses. The remaining non-credit discount will continue to be accreted into income over the remaining lives of the related loans. The following table provides a rollforward of purchased credit deteriorated loans from December 31, 2019 through September 30, 2020 (in thousands): Gross Carrying Value Accretable Nonaccretable Net Carrying December 31, 2019 $ 29,544 $ (4,801) $ (3,828) $ 20,915 Reclassification of discount to allowance for credit losses — — 3,828 3,828 Year-to-date settlements (5,600) 2,240 — (3,360) September 30, 2020 $ 23,944 $ (2,561) $ — $ 21,383 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. At September 30, 2020 and December 31, 2019, there were $2.6 million and $4.9 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, 2020 and 2019 (dollars in thousands): Three Months Ended Nine Months Ended 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 2020 Commercial real estate: Owner-occupied — $ — $ — — $ — $ — Non-owner occupied — — — — — — Consumer real estate – mortgage — — — 1 807 807 Construction and land development — — — — — — Commercial and industrial — — — — — — Consumer and other — — — — — — — $ — $ — 1 $ 807 $ 807 2019 Commercial real estate: Owner-occupied 1 $ 314 $ 297 1 $ 314 $ 297 Non-owner occupied — — — — — — 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 There were no troubled debt restructurings made during the three months ended September 30, 2020. During the nine months ended September 30, 2020 and 2019, there were no troubled debt restructurings that subsequently defaulted within twelve months of the restructuring. In response to the COVID-19 pandemic and its economic impact to its customers, Pinnacle Bank implemented a short-term modification program in accordance with interagency regulatory guidance to provide temporary payment relief to those borrowers directly impacted by COVID-19 who were not more than 30 days past due at the time of the modification. This program allows for a deferral of payments for 90 days, which Pinnacle Bank may extend for an additional 90 days, for a maximum of 180 days on a cumulative and successive basis. Pursuant to interagency guidance, such short-term deferrals are not deemed to meet the criteria for reporting as troubled debt restructurings. 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, 2020 with the comparative exposures for December 31, 2019 (in thousands): September 30, 2020 Outstanding Principal Balances Unfunded Commitments Total exposure Total Exposure at Lessors of nonresidential buildings $ 3,655,366 $ 916,186 $ 4,571,552 $ 4,578,116 Lessors of residential buildings 1,158,042 795,259 1,953,301 1,599,837 New Housing For-Sale Builders 479,532 613,518 1,093,050 1,090,603 Hotels (except Casino Hotels) and Motels 910,857 127,623 1,038,480 967,771 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, 2020 and December 31, 2019, Pinnacle Bank’s construction and land development loans as a percentage of total risk-based capital were 86.7% and 83.6%, 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 268.8% and 268.3% as of September 30, 2020 and December 31, 2019, 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, 2020, 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. At September 30, 2020, Pinnacle Bank had granted loans and other extensions of credit amounting to approximately $9.7 million to current directors, executive officers, and their related entities, of which $7.1 million had been drawn upon. At December 31, 2019, Pinnacle Bank had granted loans and other extensions of credit amounting to approximately $10.6 million to directors, executive officers, and their related entities, of which approximately $6.8 million had been drawn upon. All loans to directors, executive officers, and their related entities were performing in accordance with contractual terms at September 30, 2020 and December 31, 2019. At September 30, 2020, Pinnacle Financial had approximately $12.3 million in commercial loans held for sale compared to $17.6 million at December 31, 2019, 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, 2020, Pinnacle Financial had approximately $62.6 million of mortgage loans held-for-sale compared to approximately $61.6 million at December 31, 2019. Total loan volumes sold during the nine months ended September 30, 2020 were approximately $1.3 billion compared to approximately $788.1 million for the nine months ended September 30, 2019. During the three and nine months ended September 30, 2020, Pinnacle Financial recognized $19.5 million and $47.7 million, respectively, in gains on the sale of these loans, net of commissions paid, compared to $7.4 million and $18.3 million, respectively, net of commissions paid, during the three and nine months ended September 30,

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
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 $6.9 million at September 30, 2020 and December 31, 2019, 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, 2020 and 2019. 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, 2020 and 2019, 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, 2020 was 19.3% and 15.2%, respectively, compared to 19.5% and 19.6%, respectively, for the three and nine months ended September 30, 2019. The difference between the effective tax rate and the federal and state income tax statutory rate of 26.14% at September 30, 2020 and 2019 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 FDIC premiums and non-deductible executive compensation. Income tax expense is also impacted by the vesting of equity-based 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, 2020 we recognized excess tax expense of $85,000 and tax benefits of $505,000, respectively, compared to tax benefits of $131,000 and $832,000, respectively, for the three and nine months ended September 30, 2019. For the nine months ended September 30, 2020, income tax expense was also impacted by provision for credit losses, including provision for credit losses resulting from the COVID-19 pandemic, which was recorded as a discrete item as a component of total income tax. Accordingly, we recognized a tax benefit of $22.4 million for the nine months ended September 30, 2020.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Sep. 30, 2020
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, 2020, these commitments amounted to $9.2 billion, of which approximately $1.1 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, 2020, these commitments amounted to $191.6 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, 2020 and December 31, 2019, Pinnacle Financial had accrued $21.2 million and $2.4 million, respectively, for the inherent risks associated with these off-balance sheet commitments. The adoption of ASU 2016-13 effective January 1, 2020, which introduced the CECL methodology for measuring credit losses, as discussed more fully in Note. 1 Summary of Significant Accounting Policies , increased the opening balance of our accrual for off-balance sheet commitments at adoption by $8.8 million. The remainder of the increase is largely attributable to the anticipated economic impact of the COVID-19 pandemic and its effect on Pinnacle Financial's CECL credit loss modeling for the three and nine months ended September 30, 2020. In June 2020, a purported class action lawsuit was filed against Pinnacle Bank alleging, among other claims, that Pinnacle Bank failed to pay fees to purported agents of PPP borrowers that the plaintiff alleged were owed under the PPP in violation of SBA regulations. During the third quarter of 2020, this suit was voluntarily dismissed by the plaintiff, though the plaintiff could file the suit again. Pinnacle Bank disputed the plaintiff’s initial claims and would vigorously defend itself in connection with any future proceeding relating to the alleged claims. Various legal claims also arise from time to time in the normal course of business. In the opinion of management, the resolutions of these claims outstanding at September 30, 2020 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, 2020
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, 2020, there were approximately 808,000 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, 2020, there were no shares remaining available for issuance from the BNC Plan. No new awards may be granted under equity incentive plans of Pinnacle Financial other than the 2018 Plan. Upon the acquisition of CapitalMark, Pinnacle Financial assumed approximately 858,000 stock options under the CapitalMark Option Plan. No further awards remain available for issuance under the CapitalMark Option Plan. At September 30, 2020, 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, 2020 and information regarding expected vesting, contractual terms remaining, intrinsic values and other matters is as follows: Number Weighted-Average Weighted-Average Aggregate Outstanding at December 31, 2019 119,274 $ 23.45 2.85 $ 4,837 (1) Granted — Exercised (9,787) Forfeited — Outstanding at September 30, 2020 109,487 $ 23.44 2.10 $ 1,331 (2) Options exercisable at September 30, 2020 109,487 $ 23.44 2.10 $ 1,331 (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 $64.00 per common share at December 31, 2019 for the 119,274 options that were in-the-money at December 31, 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 $35.59 per common share at September 30, 2020 for the 109,487 options that were in-the-money at September 30, 2020. 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, 2020 is as follows: Number Grant Date Unvested at December 31, 2019 555,296 $ 57.04 Shares awarded 265,049 Restrictions lapsed and shares released to associates/directors (198,599) Shares forfeited (1) (22,293) Unvested at September 30, 2020 599,453 $ 57.60 (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, 2020. The table reflects the life-to-date activity for these awards: Grant Group (1) Vesting Period in years Shares Restrictions Lapsed and shares released to participants Shares Forfeited by participants (4) Shares Unvested Time Based Awards 2020 Associates (2) 3 - 5 246,524 116 5,076 241,332 Outside Director Awards (3) 2020 Outside directors 1 18,525 — — 18,525 (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 28, 2021 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, 2020. 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. Performance-based Vesting Restricted Stock Units The following table details the performance-based vesting restricted stock unit awards outstanding at September 30, 2020: Units Awarded Grant year Named Executive Officers (NEOs) (1) Leadership Team other than NEOs Applicable Performance Periods associated with each tranche Service period per tranche Subsequent holding period per tranche Period in which units to be settled into shares of common stock (2) 2020 136,137 — 204,220 59,648 2020 2 3 2025 2021 2 2 2025 2022 2 1 2025 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 (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, 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. During the nine months ended September 30, 2020, the restrictions associated with 129,723 performance-based vesting restricted stock unit awards granted in prior years lapsed, based on the terms of the agreement and approval by Pinnacle Financial's Human Resources and Compensation Committee, and were settled into shares of Pinnacle Financial common stock with 43,996 shares being withheld to pay the taxes associated with the settlement of those shares. Stock compensation expense related to both restricted share awards and restricted share units for the three and nine months ended September 30, 2020 was $4.4 million and $14.1 million, respectively, compared to $5.0 million and $15.1 million, respectively, for the three and nine months ended September 30, 2019. As of the September 30, 2020, the total compensation cost related to unvested restricted share awards and performance-based vesting restricted stock units not yet recognized was $40.7 million. This expense, if the underlying units are earned, is expected to be recognized over a weighted-average period of 1.86 years.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2020
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, 2020 and December 31, 2019 is included in the following table (in thousands): September 30, 2020 December 31, 2019 Balance Sheet Location Notional Estimated Notional Estimated Interest rate swap agreements: Assets Other assets $ 1,535,297 $ 115,078 $ 1,296,389 $ 43,507 Liabilities Other liabilities 1,535,297 (116,558) 1,296,389 (43,715) Total $ 3,070,594 $ (1,480) $ 2,592,778 $ (208) 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, 2020 and 2019 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 September 30, 2020 2019 2020 2019 Interest rate swap agreements Other noninterest income $ (135) $ (44) $ (1,272) $ (146) 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 interest rate floors in an effort to mitigate the impact of declining interest rates on LIBOR-based variable rate loans. 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. A summary of Pinnacle Financial's cash flow hedge relationships as of September 30, 2020 and December 31, 2019 is as follows (in thousands): September 30, 2020 December 31, 2019 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Estimated Notional Estimated Asset derivatives Interest rate floor Other assets 4.19 —% 2.25% minus 1 month LIBOR $ 1,500,000 $ 134,853 $ 2,800,000 $ 87,422 Liability derivatives Interest rate swaps Other liabilities 1.59 3.09% 3 month LIBOR $ 99,000 $ (4,610) $ 99,000 $ (3,312) 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, 2020 and 2019 were as follows, net of tax (in thousands): Amount of Gain (Loss) Recognized Three Months Ended September 30, Nine Months Ended September 30, Asset derivatives 2020 2019 2020 2019 Interest rate floor - loans $ (3,506) $ 1,951 $ 68,161 $ 9,875 Liability derivatives Interest rate swaps - borrowings $ 480 $ (69) $ (959) $ (1,572) $ (3,026) $ 1,882 $ 67,202 $ 8,303 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 at September 30, 2020 to continue to be highly effective and qualify for hedge accounting during the remaining terms of the original hedging transactions. Losses totaling $156,000 net of tax and $1.9 million net of tax were reclassified from accumulated other comprehensive income (loss) into net income during the three and nine months ended September 30, 2020, respectively, compared to losses totaling 1.1 million net of tax and $946,000 net of tax during the three and nine months ended September 30, 2019, respectively. During the first quarter of 2020, loan interest rate floors entered into in the second quarter of 2019 with a notional amount totaling $1.3 billion and unrealized gains totaling $16.5 million were terminated. These unrealized gains are being amortized into income on a straight line basis through October 2021. Approximately $8.0 million 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 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 available-for-sale securities. The hedging strategy 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, 2020 and December 31, 2019 is as follows (in thousands): September 30, 2020 December 31, 2019 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 7.12 2.26% 3 month LIBOR/Fed Funds $ 708,931 $ (77,214) $ 477,905 $ (40,778) Notional amounts of $477.5 million included in the table receive a variable rate of interest based on three month LIBOR and notional amounts totaling $231.4 million receive a variable rate of interest based on the daily compounded federal funds rate. The effects of Pinnacle Financial's fair value hedge relationships on the income statement during the three and nine months ended September 30, 2020 and 2019 were as follows (in thousands): Location of Loss on Derivative Amount of Loss Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Liability derivatives 2020 2019 2020 2019 Interest rate swaps - securities Interest income on securities $ 4,996 $ (10,888) $ (36,436) $ (37,131) Interest rate swaps - loans Interest income on loans $ — $ — $ — $ (6,915) Location of Gain on Hedged Item Amount of Gain Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Liability derivatives - hedged items 2020 2019 2020 2019 Interest rate swaps - securities Interest income on securities $ (4,996) $ 10,888 $ 36,436 $ 37,131 Interest rate swaps - loans Interest income on loans $ — $ — $ — $ 6,915 The following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges at September 30, 2020 and December 31, 2019 (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, 2020 December 31, 2019 September 30, 2020 December 31, 2019 Line item on the balance sheet Securities available-for-sale $ 853,350 $ 551,789 $ 77,214 $ 40,778 During the three and nine months ended September 30, 2020, amortization expense totaling $1.2 million and $3.3 million, respectively, related to previously terminated fair value hedges 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, 2020
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. Collateral dependent loans – Collateral dependent loans are measured at the fair value of the collateral securing the loan less estimated selling costs. The fair value of real estate collateral is determined based on real estate appraisals which are generally based on recent sales of comparable properties which are then adjusted for property specific factors. Non real estate collateral is valued based on various sources, including third party asset valuations and internally determined values based on cost adjusted for depreciation and other judgmentally determined discount factors. Collateral dependent 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, 2020 and December 31, 2019, 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 Models with significant observable market parameters Models with significant unobservable market parameters September 30, 2020 Investment securities available-for-sale: U.S. Treasury securities $ 84,464 $ — $ 84,464 $ — U.S. government agency securities 76,859 — 76,859 — Mortgage-backed securities 1,701,212 — 1,701,212 — State and municipal securities 1,327,721 — 1,312,248 15,473 Agency-backed securities 168,839 — 168,839 — Corporate notes and other 104,327 — 104,327 — Total investment securities available-for-sale $ 3,463,422 $ — $ 3,447,949 $ 15,473 Other investments 66,872 — 25,666 41,206 Other assets 265,835 — 265,835 — Total assets at fair value $ 3,796,129 $ — $ 3,739,450 $ 56,679 Other liabilities $ 198,724 $ — $ 198,724 $ — Total liabilities at fair value $ 198,724 $ — $ 198,724 $ — December 31, 2019 Investment securities available-for-sale: U.S. Treasury securities $ 72,867 $ — $ 72,867 $ — U.S. government agency securities 79,692 — 79,692 — Mortgage-backed securities 1,463,907 — 1,463,907 — State and municipal securities 1,714,453 — 1,698,550 15,903 Agency-backed securities 152,972 — 152,972 — Corporate notes and other 56,104 — 56,104 — Total investment securities available-for-sale 3,539,995 — 3,524,092 15,903 Other investments 63,291 — 25,135 38,156 Other assets 134,040 — 134,040 — Total assets at fair value $ 3,737,326 $ — $ 3,683,267 $ 54,059 Other liabilities $ 87,613 $ — $ 87,613 $ — Total liabilities at fair value $ 87,613 $ — $ 87,613 $ — The following table presents assets measured at fair value on a nonrecurring basis as of September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 Total carrying value in the consolidated balance sheet Quoted market prices in an active market Models with significant observable market parameters Models with significant unobservable market Other real estate owned $ 19,445 $ — $ — $ 19,445 Collateral dependent loans (1) 77,798 — — 77,798 Total $ 97,243 $ — $ — $ 97,243 December 31, 2019 Other real estate owned $ 29,487 $ — $ — $ 29,487 Impaired loans, net (1) 32,478 — — 32,478 Total $ 61,965 $ — $ — $ 61,965 (1) The carrying value of collateral dependent loans at September 30, 2020 is net of a valuation allowance of $10.7 million, and the carrying value of impaired loans at December 31, 2019 is net of a valuation allowance of $3.3 million. 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, 2020, 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, 2020 and September 30, 2019 (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, 2020 2019 2020 2019 Available-for-sale Securities Other Available-for-sale Securities Other Available-for-sale Securities Other Available-for-sale Securities Other Fair value, beginning of period $ 15,295 $ 40,612 $ 15,263 $ 31,522 $ 15,903 $ 38,156 $ 14,595 $ 26,422 Total realized gains included in income 27 456 29 1,264 82 4 87 2,193 Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at period-end 151 — 574 — 631 — 1,583 — Purchases — 1,095 — 1,777 — 4,822 — 6,965 Issuances — — — — — — — — Settlements — (957) — (615) (1,143) (1,776) (399) (1,632) Transfers out of Level 3 — — — — — — — — Fair value, end of period $ 15,473 $ 41,206 $ 15,866 $ 33,948 $ 15,473 $ 41,206 $ 15,866 $ 33,948 Total realized gains (losses) included in income related to financial assets and liabilities still on the consolidated balance sheet at period-end $ 27 $ 456 $ 29 $ 1,264 $ 82 $ 4 $ 87 $ 2,193 The following tables present the carrying amounts, estimated fair value and placement in the fair value hierarchy of Pinnacle Financial's financial instruments at September 30, 2020 and December 31, 2019. 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): Carrying/ Estimated Fair Value (1) Quoted market prices in an active market Models with significant observable market parameters Models with significant unobservable market September 30, 2020 Financial assets: Securities held-to-maturity $ 1,039,650 $ 1,060,847 $ — $ 1,060,847 $ — Loans, net 22,188,764 22,483,708 — — 22,483,708 Consumer loans held-for-sale 82,748 84,877 — 84,877 — Commercial loans held-for-sale 12,290 12,606 — 12,606 — Financial liabilities: Deposits and securities sold under agreements to repurchase 26,671,015 25,804,207 — — 25,804,207 Federal Home Loan Bank advances 1,287,738 1,428,059 — — 1,428,059 Subordinated debt and other borrowings 670,273 681,964 — — 681,964 Off-balance sheet instruments: Commitments to extend credit (2) 9,374,780 22,784 — — 22,784 Carrying/ Estimated Fair Value (1) Quoted market prices in an active market Models with significant observable market parameters Models with significant unobservable market December 31, 2019 Financial assets: Securities held-to-maturity $ 188,996 $ 201,217 $ — $ 201,217 $ — Loans, net 19,693,099 19,717,845 — — 19,717,845 Consumer loans held-for-sale 81,820 82,986 — 82,986 — Commercial loans held-for-sale 17,585 17,836 — 17,836 — Financial liabilities: Deposits and securities sold under agreements to repurchase 20,307,382 19,647,392 — — 19,647,392 Federal Home Loan Bank advances 2,062,534 2,078,514 — — 2,078,514 Subordinated debt and other borrowings 749,080 712,220 — — 712,220 Off-balance sheet instruments: Commitments to extend credit (2) 8,141,920 3,786 — — 3,786 (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, including both commitments for unfunded loans and standby letters of credit. In making this evaluation, Pinnacle Financial utilizes credit loss expectations on funded loans from our allowance for credit losses methodology and evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at September 30, 2020 and December 31, 2019, Pinnacle Financial included in other liabilities $21.2 million and $2.4 million, respectively, representing expected credit losses on off-balance sheet commitments, which are reflected in the estimated fair values of the related commitments. Also included in the fair values at September 30, 2020 and December 31, 2019 are unamortized fees related to these commitments of $1.6 million and $1.4 million, respectively.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2020
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. In addition, the Federal Reserve has issued supervisory guidance advising bank holding companies to eliminate, defer or reduce dividends paid on common stock and other forms of Tier 1 capital where the company’s net income available to shareholders for the past four quarters, net of dividends previously paid during that period, is not sufficient to fully fund the dividends, the company’s prospective rate of earnings retention is not consistent with the company’s capital needs and overall current and prospective financial condition or the company will not meet, or is in danger of not meeting, minimum regulatory capital adequacy ratios. Recent supplements to this guidance reiterate the need for bank holding companies to inform their applicable reserve bank sufficiently in advance of the proposed payment of a dividend in certain circumstances. During the nine months ended September 30, 2020, Pinnacle Bank paid $119.1 million in dividends to Pinnacle Financial. As of September 30, 2020, Pinnacle Bank could pay approximately $675.7 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 receipt of dividends, including dividends on Pinnacle Financial's 6.75% fixed rate non-cumulative perpetual preferred stock, Series B (the Series B Preferred Stock) from Pinnacle Bank, earnings, capital position, financial condition and other factors, including regulatory capital requirements, as they become known to Pinnacle Financial and receipt of any regulatory approvals that may become required as a result of each of Pinnacle Financial's or Pinnacle Bank's financial results. 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. As permitted by the interim final rule issued on March 27, 2020 by the federal banking regulatory agencies, each of Pinnacle Bank and Pinnacle Financial has elected the option to delay the estimated impact on regulatory capital of Pinnacle Financial's and Pinnacle Bank's adoption of ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”, which was effective January 1, 2020. The initial impact of adoption of ASU 2016-13, as well as 25% of the quarterly increases in the allowance for credit losses subsequent to adoption of ASU 2016-13 (collectively the “transition adjustments”), will be delayed for two years. After two years, the cumulative amount of the transition adjustments will become fixed and will be phased out of the regulatory capital calculations evenly over a three year period, with 75% recognized in year three, 50% recognized in year four, and 25% recognized in year five. After five years, the temporary regulatory capital benefits will be fully reversed. Management believes, as of September 30, 2020, 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 Minimum Amount Ratio Amount Ratio Amount Ratio At September 30, 2020 Total capital to risk weighted assets: Pinnacle Financial $ 3,578,436 14.2 % $ 2,015,196 8.0 % $ 2,518,994 10.0 % Pinnacle Bank $ 3,146,468 12.6 % $ 2,005,334 8.0 % $ 2,506,667 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 2,702,540 10.7 % $ 1,511,397 6.0 % $ 2,015,196 8.0 % Pinnacle Bank $ 2,819,572 11.3 % $ 1,504,000 6.0 % $ 2,005,334 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 2,485,291 9.9 % $ 1,133,547 4.5 % NA NA Pinnacle Bank $ 2,819,450 11.3 % $ 1,128,000 4.5 % $ 1,629,333 6.5 % Tier 1 capital to average assets (*): Pinnacle Financial $ 2,702,540 8.5 % $ 1,273,124 4.0 % NA NA Pinnacle Bank $ 2,819,572 8.9 % $ 1,269,171 4.0 % $ 1,586,464 5.0 % At December 31, 2019 Total capital to risk weighted assets: Pinnacle Financial $ 3,159,375 13.2 % $ 1,912,885 8.0 % $ 2,391,106 10.0 % Pinnacle Bank $ 2,906,853 12.2 % $ 1,906,839 8.0 % $ 2,383,549 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 2,319,234 9.7 % $ 1,434,664 6.0 % $ 1,912,885 8.0 % Pinnacle Bank $ 2,679,713 11.2 % $ 1,430,129 6.0 % $ 1,906,839 8.0 % Actual Minimum Capital Minimum Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 2,319,112 9.7 % $ 1,075,998 4.5 % NA NA Pinnacle Bank $ 2,679,590 11.2 % $ 1,072,597 4.5 % $ 1,549,307 6.5 % Tier 1 capital to average assets (*): Pinnacle Financial $ 2,319,234 9.1 % $ 1,021,836 4.0 % NA NA Pinnacle Bank $ 2,679,713 10.5 % $ 1,019,210 4.0 % $ 1,274,012 5.0 % (*) Average assets for the above calculations were based on the most recent quarter. During the second quarter of 2020, Pinnacle Financial issued 9.0 million depositary shares, each representing a 1/40th interest in a share of Series B preferred stock in a registered public offering to both retail and institutional investors. Net proceeds from the transaction were approximately $217.1 million after deducting the underwriting discounts and offering expenses payable by Pinnacle Financial. The net proceeds were retained by Pinnacle Financial and are available to support the capital needs of Pinnacle Financial and Pinnacle Bank, to support Pinnacle Financial's obligations, including interest payments on its outstanding indebtedness, and for other general corporate purposes.

Other borrowings

Other borrowings	9 Months Ended
	Sep. 30, 2020
Subordinated Debt [Abstract]
Other Borrowings	Note 11. 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, and Pinnacle Financial and Pinnacle Bank have entered into certain other subordinated debt agreements. On April 22, 2020, Pinnacle Financial established a credit facility with the Federal Reserve Bank in conjunction with the SBA Paycheck Protection Program, with available borrowing capacity equal to the outstanding balance of Paycheck Protection Program loans, which totaled approximately $2.3 billion at September 30, 2020. There are no amounts outstanding on this facility at September 30, 2020. These instruments are outlined below as of September 30, 2020 (in thousands): Name Date Maturity Total Debt Outstanding Interest Rate at September 30, 2020 Coupon Structure Trust preferred securities Pinnacle Statutory Trust I December 29, 2003 December 30, 2033 $ 10,310 3.05 % 30-day LIBOR + 2.80% Pinnacle Statutory Trust II September 15, 2005 September 30, 2035 20,619 1.62 % 30-day LIBOR + 1.40% Pinnacle Statutory Trust III September 7, 2006 September 30, 2036 20,619 1.87 % 30-day LIBOR + 1.65% Pinnacle Statutory Trust IV October 31, 2007 September 30, 2037 30,928 3.10 % 30-day LIBOR + 2.85% BNC Capital Trust I April 3, 2003 April 15, 2033 5,155 3.53 % 30-day LIBOR + 3.25% BNC Capital Trust II March 11, 2004 April 7, 2034 6,186 3.13 % 30-day LIBOR + 2.85% BNC Capital Trust III September 23, 2004 September 23, 2034 5,155 2.68 % 30-day LIBOR + 2.40% BNC Capital Trust IV September 27, 2006 December 31, 2036 7,217 1.92 % 30-day LIBOR + 1.70% Valley Financial Trust I June 26, 2003 June 26, 2033 4,124 3.33 % 30-day LIBOR + 3.10% Valley Financial Trust II September 26, 2005 December 15, 2035 7,217 1.74 % 30-day LIBOR + 1.49% Valley Financial Trust III December 15, 2006 January 30, 2037 5,155 2.00 % 30-day LIBOR + 1.73% Southcoast Capital Trust III August 5, 2005 September 30, 2035 10,310 1.72 % 30-day LIBOR + 1.50% Subordinated Debt Pinnacle Bank Subordinated Notes July 30, 2015 July 30, 2025 60,000 3.38 % 3-month LIBOR + 3.128% Pinnacle Bank Subordinated Notes March 10, 2016 July 30, 2025 70,000 3.38 % 3-month LIBOR + 3.128% Pinnacle Financial Subordinated Notes November 16, 2016 November 16, 2026 120,000 5.25 % Fixed (1) Pinnacle Financial Subordinated Notes September 11, 2019 September 15, 2029 300,000 4.13 % Fixed (2) Debt issuance costs and fair value adjustments (12,722) Total subordinated debt and other borrowings $ 670,273 (1) Migrates to three month LIBOR + 3.884% beginning November 16, 2021 through the end of the term. (2) Migrates to three month LIBOR + 2.775% beginning September 15, 2024 through the end of the term.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
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, 2019 (2019 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. 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 credit losses and determination of any impairment of goodwill or intangible assets. It is reasonably possible Pinnacle Financial's estimate of the allowance for credit losses and determination of impairment of goodwill or intangible assets could change as a result of the continued impact of the COVID-19 pandemic on the economy. The resulting change in these estimates could be material to Pinnacle Financial's consolidated financial statements. There have been no significant changes to Pinnacle Financial's significant accounting policies as disclosed in the 2019 10-K other than those that relate to the allowance for credit losses upon adoption of ASU 2016-13 as described later within Note 1.
Income Per Common Share	Income Per Common Share — Basic net income per common share (EPS) is computed by dividing net income available to common shareholders 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 common share calculations for the three and nine months ended September 30, 2020 and 2019 (in thousands, except per share data): Three months ended Nine months ended 2020 2019 2020 2019 Basic net income per common share calculation: Numerator - Net income available to common shareholders $ 106,847 $ 110,521 $ 197,647 $ 304,802 Denominator - Weighted average common shares outstanding 75,241 76,301 75,418 76,481 Basic net income per common share $ 1.42 $ 1.45 $ 2.62 $ 3.99 Diluted net income per common share calculation: Numerator – Net income available to common shareholders $ 106,847 $ 110,521 $ 197,647 $ 304,802 Denominator - Weighted average common shares outstanding 75,241 76,301 75,418 76,481 Dilutive common shares contingently issuable 119 255 127 280 Weighted average diluted common shares outstanding 75,360 76,556 75,545 76,761 Diluted net income per common share $ 1.42 $ 1.44 $ 2.62 $ 3.97
Allowance for credit losses	Allowance for Credit Losses - Loans - As described below under Recently Adopted Accounting Pronouncements, Pinnacle Financial adopted FASB ASC 326 effective January 1, 2020, which requires the estimation of an allowance for credit losses in accordance with the current expected credit loss (CECL) methodology. Pinnacle Financial's management assesses the adequacy of the allowance on a quarterly basis. This assessment includes procedures to estimate the allowance and test the adequacy and appropriateness of the resulting balance. The level of the allowance is based upon management's evaluation of historical default and loss experience, current and projected economic conditions, asset quality trends, known and inherent risks in the portfolio, adverse situations that may affect the borrowers' ability to repay a loan (including the timing of future payments), the estimated value of any underlying collateral, composition of the loan portfolio, industry and peer bank loan quality indications and other pertinent factors, including regulatory recommendations. The level of the allowance for credit losses maintained by management is believed adequate to absorb all expected future losses inherent in the loan portfolio at the balance sheet date. The allowance is increased through provision for credit losses and decreased by charge-offs, net of recoveries of amounts previously charged-off. The allowance for credit losses is measured on a collective basis for pools of loans with similar risk characteristics. Pinnacle Financial has identified the following pools of financial assets with similar risk characteristics for measuring expected credit losses: • Owner occupied commercial real estate mortgage loans - Owner occupied commercial real estate mortgage loans are secured by commercial office buildings, industrial buildings, warehouses or retail buildings where the owner of the building occupies the property. For such loans, repayment is largely dependent upon the operation of the borrower's business. • Non-owner occupied commercial real estate loans - These loans represent investment real estate loans secured by office buildings, industrial buildings, warehouses, retail buildings, and multifamily residential housing. Repayment is primarily dependent on lease income generated from the underlying collateral. • 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. Repayment is primarily dependent on the personal cash flow of the borrower. • Construction and land development loans - Construction and land development loans include loans where the repayment is dependent on the successful completion and eventual sale, refinance or 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. These loans are generally secured by equipment, inventory, and accounts receivable of the borrower and repayment is primarily dependent on business cash flows. • 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, consumer credit cards and loans to finance education, among others. Many consumer loans are unsecured. Repayment is primarily dependent on the personal cash flow of the borrower. For commercial real estate, consumer real estate, construction and land development, and commercial and industrial loans, Pinnacle Financial primarily utilizes a probability of default (PD) and loss given default (LGD) modeling approach. These models utilize historical correlations between default experience and certain macroeconomic factors as determined through a statistical regression analysis. All loan segments modeled using this approach consider changes in the national unemployment rate. In addition to the national unemployment rate, gross domestic product and the three month treasury rate are considered for owner occupied commercial real estate, the commercial real estate price index and the five year treasury rate are considered for construction loans, and the three month treasury rate is considered for commercial and industrial loans. Projections of these macroeconomic factors, obtained from an independent third party, are utilized to predict quarterly rates of default based on the statistical PD models. The predicted quarterly default rates are then applied to the estimated future exposure at default (EAD), as determined based on contractual amortization terms and estimated prepayments. An estimated LGD, determined based on historical loss experience, is applied to the quarterly defaulted balances for each loan segment to estimate future losses of the loan's amortized cost. Losses are predicted over a period of time determined to be reasonable and supportable, and at the end of the reasonable and supportable period losses are reverted to long term historical averages. The reasonable and supportable period and reversion period are re-evaluated each quarter by Pinnacle Financial and are dependent on the current economic environment among other factors. Upon implementation of CECL on January 1, 2020 and at September 30, 2020, a reasonable and supportable period of eighteen months was utilized for all loan segments, followed by a twelve month straight line reversion to long term averages. For the consumer and other loan segment, a loss rate approach is utilized. For these loans, historical charge off rates are applied to projected future balances, as determined in the same manner as EAD for the statistically modeled loan segments. For credit cards, which have no amortization terms or contractual maturities and are unconditionally cancellable, future balances are estimated based on expected payment volume applied to the current balance. The estimated loan losses for all loan segments are adjusted for changes in qualitative factors not inherently considered in the quantitative analyses. The qualitative categories and the measurements used to quantify the risks within each of these categories are subjectively selected by management, but measured by objective measurements period over period. The data for each measurement may be obtained from internal or external sources. The current period measurements are evaluated and assigned a factor commensurate with the current level of risk relative to past measurements over time. The resulting qualitative adjustments are applied to the relevant collectively evaluated loan portfolios. These adjustments are based upon quarterly trend assessments in portfolio concentrations, policy exceptions, associate retention, independent loan review results, collateral considerations, risk ratings, competition and peer group credit quality trends. The qualitative allowance allocation, as determined by the processes noted above, is increased or decreased for each loan segment based on the assessment of these various qualitative factors. Loans that do not share similar risk characteristics with the collectively evaluated pools are evaluated on an individual basis and are excluded from the collectively evaluated pools. Individual evaluations are generally performed for loans greater than $1.0 million which have experienced significant credit deterioration. Such loans are evaluated for credit losses based on either discounted cash flows or the fair value of collateral. When management determines that foreclosure is probable, expected credit losses are based on the fair value of the collateral, less selling costs. For loans for which foreclosure is not probable, but for which repayment is expected to be provided substantially through the operation or sale of the collateral, Pinnacle Financial has elected the practical expedient under ASC 326 to estimate expected credit losses based on the fair value of collateral, with selling costs considered in the event sale of the collateral is expected. Loans for which terms have been modified in a troubled debt restructuring (TDR) are evaluated using these same individual evaluation methods. In the event the discounted cash flow method is used for a TDR, the original interest rate is used to discount expected cash flows. In assessing the adequacy of the allowance for credit losses, Pinnacle Financial considers the results of Pinnacle Financial's ongoing independent loan review process. Pinnacle Financial undertakes this process both to ascertain those loans in the portfolio with elevated credit risk and to assist in its overall evaluation of the risk characteristics of the entire loan portfolio. Its loan review process includes the judgment of management, independent internal loan reviewers and reviews that may have been conducted by third-party reviewers including regulatory examiners. Pinnacle Financial incorporates relevant loan review results in the allowance. In accordance with CECL, losses are estimated over the remaining contractual terms of loans, adjusted for prepayments. The contractual term excludes expected extensions, renewals and modifications unless management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed or such renewals, extensions or modifications are included in the original loan agreement and are not unconditionally cancellable by Pinnacle Financial. Credit losses are estimated on the amortized cost basis of loans, which includes the principal balance outstanding, purchase discounts and premiums, deferred loan fees and costs and accrued interest receivable. Accrued interest receivable is presented separately on the balance sheets and as allowed under ASU 2016-13 is excluded from the tabular loan disclosures in Note 4. While policies and procedures used to estimate the allowance for credit losses, as well as the resultant provision for credit losses charged to income, are considered adequate by management and are reviewed periodically by regulators, model validators and internal audit, they are necessarily approximate and imprecise. There are factors beyond Pinnacle Financial's control, such as changes in projected economic conditions, real estate markets or particular industry conditions which may materially impact asset quality and the adequacy of the allowance for credit losses and thus the resulting provision for credit losses. Allowance for Credit Losses on Off Balance Sheet Credit Exposures - Pinnacle Financial estimates expected credit losses over the contractual term of obligations to extend credit, unless the obligation is unconditionally cancellable. The allowance for off balance sheet exposures is adjusted through other noninterest expense. The estimates are determined based on the likelihood of funding during the contractual term and an estimate of credit losses subsequent to funding. Estimated credit losses on subsequently funded balances are based on the same assumptions as used to estimated credit losses on existing funded loans. Allowance for Credit Losses - Securities Held-to-Maturity - Expected credit losses on debt securities classified as held-to-maturity are measured on a collective basis by major security type. The estimates of expected credit losses are based on historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. The models rely on regression analyses to predict PD based on projected macroeconomic factors, including unemployment rates and GDP, among others. At September 30, 2020, Pinnacle Financial's held-to-maturity securities consisted entirely of municipal securities rated A or higher by the ratings agencies. A reasonable and supportable period of 18 months and reversion period of 12 months is utilized to estimate credit losses on held-to-maturity municipal securities. The allowance is increased through provision for credit losses and decreased by charge-offs, net of recoveries of amounts previously charged-off. Allowance for Credit Losses - Securities Available-for-Sale - For any securities classified as available-for-sale that are in an unrealized loss position at the balance sheet date, Pinnacle Financial assesses whether or not it intends to sell the security, or more likely than not will be required to sell the security, before recovery of its amortized cost basis. If either criteria is met, the security's amortized cost basis is written down to fair value through net income. If neither criteria is met, Pinnacle Financial evaluates whether any portion of the decline in fair value is the result of credit deterioration. Such evaluations consider the extent to which the amortized cost of the security exceeds its fair value, changes in credit ratings and any other known adverse conditions related to the specific security. If the evaluation indicates that a credit loss exists, an allowance for credit losses is recorded through provisions for credit
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements — 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 became effective for Pinnacle Financial on January 1, 2020. Pinnacle Financial performed its annual assessment of goodwill as of September 30, 2020. No impairment charge was identified as a result of the assessment. In June 2016, the FASB issued Accounting Standards Update 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments (Topic 326), and has issued subsequent amendments thereto, which introduces the current expected credit losses (CECL) methodology. Among other things, ASC 326 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 requires institutions to calculate all probable and estimable losses that are expected to be incurred through the financial asset's contractual life through a provision for credit losses, including loans obtained as a result of any acquisition not deemed to be purchased credit deteriorated (PCD). ASC 326 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 determined at acquisition is added to the purchase price rather than recorded as provision expense. In accordance with ASC 326, the disclosure of credit quality indicators related to the amortized cost of financing receivables is further disaggregated by year of origination (or vintage). Pinnacle Financial adopted ASU 2016-13 and all subsequent amendments thereto effective January 1, 2020 using the modified retrospective method for all financial assets measured at amortized cost and off balance sheet credit exposures. Amounts for periods beginning on or after January 1, 2020 are presented under ASC 326 and all prior period information is presented in accordance with previously applicable GAAP. At January 1, 2020, Pinnacle Financial recognized a cumulative adjustment to retained earnings of $31.8 million, net of tax, attributable to an increase in the allowance for credit losses of $34.3 million, an increase in the allowance for off balance sheet credit exposures of $8.8 million, and an increase in deferred tax assets of $11.3 million. In addition, an allowance of $3.8 million was recognized on loans purchased with credit deterioration (PCD) previously classified as purchased credit impaired (PCI) with a corresponding adjustment to the gross carrying amount of the loans. Pinnacle Financial adopted ASC 326 using the prospective transition approach for PCD loans, which did not require re-evaluation of whether loans previously classified as PCI loans met the criteria of PCD assets at the date of adoption. The remaining noncredit discount will be accreted into interest income at the effective interest rate as of January 1, 2020.
Newly Issued Not Yet Effective Accounting Standards	Newly Issued Not Yet Effective Accounting Standards — In March 2020, the FASB issued Accounting Standards Update 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides temporary optional guidance to ease the potential burden in accounting for reference rate reform. The ASU provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. It is intended to help stakeholders during the global market-wide reference rate transition period. The guidance is effective for all entities as of March 12, 2020 through December 31, 2022. Pinnacle Financial is implementing a transition plan to identify and modify its loans and other financial instruments, including certain indebtedness, with attributes that are either directly or indirectly influenced by LIBOR. Pinnacle Financial is assessing ASU 2020-04 and its impact on the transition away from LIBOR for its loans and other financial instruments. In January 2020, the FASB issued Accounting Standards Update 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) - Clarifying the Interactions between Topic 321, Topic 323, and Topic 815. These amendments, among other things, clarify that a company should consider observable transactions that require a company to either apply or discontinue the equity method of accounting under Topic 323, Investments-Equity Method and Joint Ventures, for the purposes of applying the measurement alternative in accordance with Topic 321 immediately before applying or upon discontinuing the equity method. The amendments also clarify that, when determining the accounting for certain forward contracts and purchased options a company should not consider, whether upon settlement or exercise, if the underlying securities would be accounted for under the equity method or fair value option. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early application is permitted, including early adoption in an interim period. An entity should apply ASU 2020-01 prospectively at the beginning of the interim period that includes the adoption date. Pinnacle Financial is assessing ASU 2020-01 and its impact on its accounting and disclosures. In December 2019, the FASB issued Accounting Standards Update No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes to simplify various aspects of the current guidance to promote consistent application of the standard among reporting entities by moving certain exceptions to the general principles. The amendments are effective for fiscal years beginning after December 15, 2020, with early adoption permitted. Pinnacle Financial does not plan to adopt this standard early. 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.
Reclassifications	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, 2020 through the date of the issued financial statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 and 2019 was as follows (in thousands): For the nine months ended 2020 2019 Cash Transactions: Interest paid $ 179,163 $ 216,261 Income taxes paid, net 89,858 61,238 Operating lease payments 10,077 10,193 Noncash Transactions: Loans charged-off to the allowance for credit losses 35,724 21,328 Loans foreclosed upon and transferred to other real estate owned 3,435 16,870 Loans foreclosed upon and transferred to other assets 25 93 Fixed assets transferred to other real estate owned — 5,126 Available-for-sale securities transferred to held-to-maturity portfolio 873,613 — Right-of-use asset recognized during the period in exchange for lease obligations (1) 5,269 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 common share calculations for the three and nine months ended September 30, 2020 and 2019 (in thousands, except per share data): Three months ended Nine months ended 2020 2019 2020 2019 Basic net income per common share calculation: Numerator - Net income available to common shareholders $ 106,847 $ 110,521 $ 197,647 $ 304,802 Denominator - Weighted average common shares outstanding 75,241 76,301 75,418 76,481 Basic net income per common share $ 1.42 $ 1.45 $ 2.62 $ 3.99 Diluted net income per common share calculation: Numerator – Net income available to common shareholders $ 106,847 $ 110,521 $ 197,647 $ 304,802 Denominator - Weighted average common shares outstanding 75,241 76,301 75,418 76,481 Dilutive common shares contingently issuable 119 255 127 280 Weighted average diluted common shares outstanding 75,360 76,556 75,545 76,761 Diluted net income per common share $ 1.42 $ 1.44 $ 2.62 $ 3.97

Equity method investment (Table

Equity method investment (Tables)	9 Months Ended
	Sep. 30, 2020
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	A summary of BHG's financial position as of September 30, 2020 and December 31, 2019 and results of operations as of and for the three and nine months ended September 30, 2020 and 2019, were as follows (in thousands): As of September 30, 2020 December 31, 2019 Assets $ 1,249,530 $ 840,398 Liabilities 1,006,462 641,037 Equity interests 243,068 199,361 Total liabilities and equity $ 1,249,530 $ 840,398 For the three months ended For the nine months ended 2020 2019 2020 2019 Revenues $ 128,510 $ 108,770 $ 319,244 $ 279,569 Net income $ 51,459 $ 61,364 $ 121,604 $ 156,064

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 and December 31, 2019 are summarized as follows (in thousands): Amortized Gross Gross Fair September 30, 2020: Securities available-for-sale: U.S. Treasury securities $ 84,438 $ 28 $ 2 $ 84,464 U.S. government agency securities 75,345 1,543 29 76,859 Mortgage-backed securities 1,634,329 69,311 2,428 1,701,212 State and municipal securities 1,324,383 31,081 27,743 1,327,721 Asset-backed securities 169,540 470 1,171 168,839 Corporate notes and other 106,638 1,063 3,374 104,327 $ 3,394,673 $ 103,496 $ 34,747 $ 3,463,422 Securities held-to-maturity: State and municipal securities $ 1,039,841 $ 23,814 $ 2,808 $ 1,060,847 $ 1,039,841 $ 23,814 $ 2,808 $ 1,060,847 Allowance for credit losses - securities held-to-maturity (191) Securities held-to-maturity, net of allowance for credit losses $ 1,039,650 December 31, 2019: Securities available-for-sale: U.S. Treasury securities $ 72,862 $ 19 $ 14 $ 72,867 U.S. government agency securities 80,096 306 710 79,692 Mortgage-backed securities 1,458,894 12,789 7,776 1,463,907 State and municipal securities 1,669,606 52,096 7,249 1,714,453 Asset-backed securities 153,963 302 1,293 152,972 Corporate notes and other 56,212 635 743 56,104 $ 3,491,633 $ 66,147 17,785 $ 3,539,995 Securities held-to-maturity: State and municipal securities $ 188,996 $ 12,221 $ — $ 201,217 $ 188,996 $ 12,221 $ — $ 201,217
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of debt securities as of September 30, 2020 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, 2020: Amortized Fair Amortized Fair Due in one year or less $ 85,090 $ 85,120 $ — $ — Due in one year to five years 12,059 12,446 1,409 1,482 Due in five years to ten years 175,812 181,102 7,209 7,293 Due after ten years 1,317,843 1,314,703 1,031,223 1,052,072 Mortgage-backed securities 1,634,329 1,701,212 — — Asset-backed securities 169,540 168,839 — — $ 3,394,673 $ 3,463,422 $ 1,039,841 $ 1,060,847
Classification of Investments According to Term of Unrealized Losses of Less than Twelve Months or Twelve Months or Longer	At September 30, 2020 and December 31, 2019, 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 Investments with an Unrealized Loss of Total Investments with an Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized At September 30, 2020 U.S. Treasury securities $ 25,973 $ 2 $ — $ — $ 25,973 $ 2 U.S. government agency securities 10,576 4 6,360 25 16,936 29 Mortgage-backed securities 138,532 1,746 39,350 682 177,882 2,428 State and municipal securities 199,365 3,608 539,131 24,676 738,496 28,284 Asset-backed securities 74,977 355 67,973 816 142,950 1,171 Corporate notes 26,309 174 22,880 3,200 49,189 3,374 Total temporarily-impaired securities $ 475,732 $ 5,889 $ 675,694 $ 29,399 $ 1,151,426 $ 35,288 At December 31, 2019 U.S. Treasury securities $ 40,505 $ 14 $ — $ — $ 40,505 $ 14 U.S. government agency securities 1,222 1 30,892 709 32,114 710 Mortgage-backed securities 458,881 5,102 163,767 2,674 622,648 7,776 State and municipal securities 204,958 1,938 244,884 5,311 449,842 7,249 Asset-backed securities 75,488 796 59,816 497 135,304 1,293 Corporate notes — — 16,908 743 16,908 743 Total temporarily-impaired securities $ 781,054 $ 7,851 $ 516,267 $ 9,934 $ 1,297,321 $ 17,785

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	Loans at September 30, 2020 and December 31, 2019 were as follows: September 30, 2020 December 31, 2019 Commercial real estate: Owner occupied $ 2,748,075 $ 2,669,766 Non-owner occupied 5,220,452 5,039,452 Consumer real estate – mortgage 3,041,019 3,068,625 Construction and land development 2,728,439 2,430,483 Commercial and industrial 8,395,963 6,290,296 Consumer and other 343,461 289,254 Subtotal $ 22,477,409 $ 19,787,876 Allowance for credit losses (288,645) (94,777) Loans, net $ 22,188,764 $ 19,693,099
Loan Classification Categorized by Risk Rating Category	The table below presents loan balances classified within each risk rating category by primary loan type and based on year of origination as of September 30, 2020 (in thousands): September 30, 2020 2020 2019 2018 2017 2016 Prior Revolving Loans Total Commercial real estate- owner occupied Pass $ 514,127 $ 473,410 $ 497,269 $ 347,792 $ 368,441 $ 304,692 $ 79,208 $ 2,584,939 Special Mention 3,349 11,949 23,805 12,775 3,901 5,698 — 61,477 Substandard (1) 21,725 6,251 7,828 15,991 8,986 2,119 28,134 91,034 Substandard-nonaccrual 901 155 989 1,463 1,720 3,592 1,805 10,625 Doubtful-nonaccrual — — — — — — — — Total Commercial real estate - owner occupied $ 540,102 $ 491,765 $ 529,891 $ 378,021 $ 383,048 $ 316,101 $ 109,147 $ 2,748,075 Commercial real estate- Non-owner occupied Pass $ 1,011,392 $ 1,035,694 $ 765,605 $ 560,797 $ 509,620 $ 403,696 $ 54,308 $ 4,341,112 Special Mention 165,690 120,702 121,523 157,652 144,731 128,007 11,028 849,333 Substandard (1) 6,696 1,495 5,699 6,120 1,015 2,972 — 23,997 Substandard-nonaccrual — 437 745 139 840 3,849 — 6,010 Doubtful-nonaccrual — — — — — — — — Total Commercial real estate - Non-owner occupied $ 1,183,778 $ 1,158,328 $ 893,572 $ 724,708 $ 656,206 $ 538,524 $ 65,336 $ 5,220,452 Consumer real estate – mortgage Pass $ 462,452 $ 539,068 $ 372,363 $ 183,725 $ 142,646 $ 341,108 $ 955,781 $ 2,997,143 Special Mention 102 2,695 2,929 644 — 1,040 8,739 16,149 Substandard (1) — 546 — 895 9 2,274 2,108 5,832 Substandard-nonaccrual 169 1,677 1,003 1,426 2,627 11,027 3,966 21,895 Doubtful-nonaccrual — — — — — — — — Total Consumer real estate – mortgage $ 462,723 $ 543,986 $ 376,295 $ 186,690 $ 145,282 $ 355,449 $ 970,594 $ 3,041,019 Construction and land development Pass $ 849,025 $ 1,209,363 $ 471,069 $ 77,146 $ 20,229 $ 10,394 $ 15,858 $ 2,653,084 Special Mention 6,924 33,253 26,062 — 4,244 — — 70,483 Substandard (1) 619 681 29 — 240 150 — 1,719 Substandard-nonaccrual 391 554 77 83 — 2,048 — 3,153 Doubtful-nonaccrual — — — — — — — — Total Construction and land development $ 856,959 $ 1,243,851 $ 497,237 $ 77,229 $ 24,713 $ 12,592 $ 15,858 $ 2,728,439 Commercial and industrial Pass $ 3,566,925 $ 1,227,003 $ 779,760 $ 349,805 $ 149,094 $ 98,086 $ 1,946,224 $ 8,116,897 Special Mention 20,986 50,577 8,568 8,385 8,216 2,081 58,186 156,999 Substandard (1) 27,070 19,268 17,377 3,016 579 2,074 23,735 93,119 Substandard-nonaccrual 14,039 5,459 382 4,676 197 258 3,937 28,948 Doubtful-nonaccrual — — — — — — — — Total Commercial and industrial $ 3,629,020 $ 1,302,307 $ 806,087 $ 365,882 $ 158,086 $ 102,499 $ 2,032,082 $ 8,395,963 Consumer and other Pass $ 113,807 $ 23,974 $ 8,182 $ 8,379 $ 4,635 $ 2,142 $ 181,583 $ 342,702 Special Mention — — — — — — — — Substandard (1) — — — — — — — — Substandard-nonaccrual — — 2 7 12 2 736 759 Doubtful-nonaccrual — — — — — — — — Total Consumer and other $ 113,807 $ 23,974 $ 8,184 $ 8,386 $ 4,647 $ 2,144 $ 182,319 $ 343,461 September 30, 2020 2020 2019 2018 2017 2016 Prior Revolving Loans Total Total loans Pass $ 6,517,728 $ 4,508,512 $ 2,894,248 $ 1,527,644 $ 1,194,665 $ 1,160,118 $ 3,232,962 $ 21,035,877 Special Mention 197,051 219,176 182,887 179,456 161,092 136,826 77,953 1,154,441 Substandard (1) 56,110 28,241 30,933 26,022 10,829 9,589 53,977 215,701 Substandard-nonaccrual 15,500 8,282 3,198 7,794 5,396 20,776 10,444 71,390 Doubtful-nonaccrual — — — — — — — — Total loans $ 6,786,389 $ 4,764,211 $ 3,111,266 $ 1,740,916 $ 1,371,982 $ 1,327,309 $ 3,375,336 $ 22,477,409 The following table outlines the risk category of loans as of December 31, 2019 (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Total December 31, 2019 Pass $ 7,499,725 $ 3,019,203 $ 2,422,347 $ 6,069,757 $ 288,361 $ 19,299,393 Special Mention 51,147 13,787 2,816 79,819 698 148,267 Substandard (1) 139,518 10,969 3,042 125,035 47 278,611 Substandard-nonaccrual 18,828 24,666 2,278 15,685 148 61,605 Doubtful-nonaccrual — — — — — — Total loans $ 7,709,218 $ 3,068,625 $ 2,430,483 $ 6,290,296 $ 289,254 $ 19,787,876
Past Due Balances by Loan Classification	The table below presents the aging of past due balances by loan segment at September 30, 2020 and December 31, 2019 (in thousands): September 30, 2020 30-59 days past due 60-89 days past due 90 days or more past due Total past due Current Total loans Commercial real estate: Owner-occupied $ 3,365 $ 415 $ 4,226 $ 8,006 $ 2,740,069 $ 2,748,075 Non-owner occupied 1,612 1,928 5,353 8,893 5,211,559 5,220,452 Consumer real estate – mortgage 7,852 1,338 5,971 15,161 3,025,858 3,041,019 Construction and land development 2,417 — 2,031 4,448 2,723,991 2,728,439 Commercial and industrial 6,615 4,743 4,986 16,344 8,379,619 8,395,963 Consumer and other 846 82 1,220 2,148 341,313 343,461 Total $ 22,707 $ 8,506 $ 23,787 $ 55,000 $ 22,422,409 $ 22,477,409 December 31, 2019 Commercial real estate: Owner-occupied $ 2,307 $ 2,932 $ 1,719 $ 6,958 $ 2,662,808 $ 2,669,766 Non-owner occupied 3,156 3,641 3,816 10,613 5,028,839 5,039,452 Consumer real estate – mortgage 11,646 2,157 7,304 21,107 3,047,518 3,068,625 Construction and land development 1,392 711 1,487 3,590 2,426,893 2,430,483 Commercial and industrial 8,474 2,478 6,364 17,316 6,272,980 6,290,296 Consumer and other 1,770 414 570 2,754 286,500 289,254 Total $ 28,745 $ 12,333 $ 21,260 $ 21,260 $ 62,338 $ 19,725,538 $ 19,787,876
Details of Changes in the Allowance for Loan Losses	The following table details the changes in the allowance for credit losses for the three and nine months ended September 30, 2020 and 2019, respectively, by loan classification (in thousands): Commercial real estate - Owner occupied Commercial real estate - Non-owner occupied Consumer Construction and land development Commercial and industrial Consumer Unallocated Total Three months ended September 30, 2020: Balance at June 30, 2020 $ 38,803 $ 68,426 $ 29,358 $ 41,897 $ 100,610 $ 6,278 $ — $ 285,372 Charged-off loans (186) (222) (907) — (12,984) (730) — (15,029) Recovery of previously charged-off loans 47 432 297 7 799 391 — 1,973 Provision for credit losses on loans (2,238) 1,223 3,201 (682) 13,783 1,042 — 16,329 Balance at September 30, 2020 $ 36,426 $ 69,859 $ 31,949 $ 41,222 $ 102,208 $ 6,981 $ — $ 288,645 Three months ended September 30, 2019: Balance at June 30, 2019 $ 12,174 $ 18,652 $ 8,489 $ 11,206 $ 37,436 $ 2,114 $ 182 $ 90,253 Charged-off loans (40) (62) (194) (14) (5,082) (1,388) — (6,780) Recovery of previously charged-off loans 135 74 901 97 407 300 — 1,914 Provision for credit losses on loans (112) 1,796 (1,426) 585 1,814 3,278 2,325 8,260 Balance at September 30, 2019 $ 12,157 $ 20,460 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 Nine months ended September 30, 2020: Balance at December 31, 2019 $ 13,406 $ 19,963 $ 8,054 $ 12,662 $ 36,112 $ 3,595 $ 985 $ 94,777 Impact of adopting ASC 326 264 (4,740) 21,029 (3,144) 23,040 2,638 (985) 38,102 Charged-off loans (1,247) (485) (3,033) — (27,982) (2,977) — (35,724) Recovery of previously charged-off loans 272 631 971 100 3,798 1,356 — 7,128 Provision for credit losses on loans 23,731 54,490 4,928 31,604 67,240 2,369 — 184,362 Balance at September 30, 2020 $ 36,426 $ 69,859 $ 31,949 $ 41,222 $ 102,208 $ 6,981 $ — $ 288,645 Nine months ended September 30, 2019: Balance at December 31, 2018 $ 11,297 $ 15,649 $ 7,670 $ 11,128 $ 31,731 $ 5,423 $ 677 $ 83,575 Charged-off loans (1,626) (75) (1,124) (18) (13,842) (4,643) — (21,328) Recovery of previously charged-off loans 211 962 1,642 238 4,749 959 — 8,761 Provision for credit losses on loans 2,275 3,924 (418) 526 11,937 2,565 1,830 22,639 Balance at September 30, 2019 $ 12,157 $ 20,460 $ 7,770 $ 11,874 $ 34,575 $ 4,304 $ 2,507 $ 93,647 The following table details the allowance for credit losses on loans and recorded investment in loans by loan classification and by impairment evaluation method as of December 31, 2019, as determined in accordance with ASC 310 prior to the adoption of ASU 2016-13 (in thousands): Commercial real estate - mortgage Consumer Construction and land development Commercial and industrial Consumer Unallocated Total December 31, 2019 Allowance for Loan Losses: Collectively evaluated for impairment $ 32,134 $ 6,762 $ 12,629 $ 35,401 $ 3,586 $ 90,512 Individually evaluated for impairment 1,235 1,292 33 711 9 3,280 Loans acquired with deteriorated credit quality (1) — — — — — — Total allowance for loan losses $ 33,369 $ 8,054 $ 12,662 $ 36,112 $ 3,595 $ 985 $ 94,777 Loans: Collectively evaluated for impairment $ 7,681,608 $ 3,036,922 $ 2,426,901 $ 6,274,280 $ 289,106 $ 19,708,817 Individually evaluated for impairment 18,122 25,018 561 14,295 148 58,144 Loans acquired with deteriorated credit quality 9,488 6,685 3,021 1,721 — 20,915 Total loans $ 7,709,218 $ 3,068,625 $ 2,430,483 $ 6,290,296 $ 289,254 $ 19,787,876 (1) Prior to the adoption of ASC 326 on January 1, 2020, an allowance for loan losses was recorded on loans acquired with deteriorated credit quality only in the event of additional credit deterioration subsequent to acquisition.
Schedule of Collateral Dependent Loans Individually Evaluated for ACL	The following table presents the amortized cost basis of collateral dependent loans, which are individually evaluated to determine expected credit losses: September 30, 2020 Real Estate Business Assets Other Total Commercial real estate: Owner-occupied 14,955 — — 14,955 Non-owner occupied 11,294 — — 11,294 Consumer real estate – mortgage 27,122 — — 27,122 Construction and land development 4,362 — — 4,362 Commercial and industrial 2,052 28,692 45 30,789 Consumer and other — — 21 21 Total $ 59,785 $ 28,692 $ 66 $ 88,543
Financing Receivable, Nonaccrual	The table below presents the amortized cost basis of loans on nonaccrual status and loans past due 90 or more days and still accruing interest at September 30, 2020 and December 31, 2019. Also presented is the balance of loans on nonaccrual status at September 30, 2020 for which there was no related allowance for credit losses recorded (in thousands): September 30, 2020 December 31, 2019 Total nonaccrual loans Nonaccrual loans with no allowance for credit losses Loans past due 90 or more days and still accruing Total nonaccrual loans Loans past due 90 or more days and still accruing Commercial real estate: Owner-occupied $ 10,625 $ 5,704 $ — $ 11,654 $ — Non-owner occupied 6,010 — — 7,173 — Consumer real estate – mortgage 21,895 — 281 24,667 168 Construction and land development 3,152 1,152 — 2,278 — Commercial and industrial 28,948 7,960 563 15,685 946 Consumer and other 760 — 469 148 501 Total $ 71,390 $ 14,816 $ 1,313 $ 61,605 $ 1,615
Summary of Recorded Investment, Unpaid Principal Balance and Related Allowance and Average Recorded Investment of Impaired Loans	The following table presents impaired loans at December 31, 2019 as determined under ASC 310 prior to the adoption of ASU 2016-13. Impaired loans generally include nonaccrual loans, troubled debt restructurings, and other loans deemed to be impaired but that continue to accrue interest. Presented are the recorded investment, unpaid principal balance and related allowance of impaired loans at December 31, 2019 by loan classification (in thousands): At December 31, 2019 Recorded investment Unpaid principal balances Related allowance Impaired loans with an allowance: Commercial real estate – mortgage $ 9,998 $ 10,983 $ 1,235 Consumer real estate – mortgage 20,996 23,105 1,292 Construction and land development 542 654 33 Commercial and industrial 4,074 5,381 711 Consumer and other 148 182 9 Total $ 35,758 $ 40,305 $ 3,280 Impaired loans without an allowance: Commercial real estate – mortgage $ 8,124 $ 8,891 $ — Consumer real estate – mortgage 4,022 4,021 — Construction and land development 19 17 — Commercial and industrial 10,221 11,322 — Consumer and other — — — Total $ 22,386 $ 24,251 $ — Total impaired loans $ 58,144 $ 64,556 $ 3,280 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, respectively, of impaired loans by loan classification as determined under ASC 310 prior to the adoption of ASU 2016-13 (in thousands): Three months ended Nine months ended Average recorded investment Interest income recognized Average recorded investment Interest income recognized Impaired loans with an allowance: Commercial real estate – mortgage $ 13,050 $ — $ 14,689 $ — Consumer real estate – mortgage 19,508 — 20,887 — Construction and land development 451 — 587 — Commercial and industrial 11,113 — 10,070 — Consumer and other 143 — 400 — Total $ 44,265 $ — $ 46,633 $ — Impaired loans without an allowance: Commercial real estate – mortgage $ 9,344 $ — $ 12,521 $ 176 Consumer real estate – mortgage 7,922 — 8,381 — Construction and land development 10 — 452 — Commercial and industrial 12,108 — 13,625 — Consumer and other — — — — Total $ 29,384 $ — $ 34,979 $ 176 Total impaired loans $ 73,649 $ — $ 81,612 $ 176
Purchase Credit Impaired Loans	Prior to the adoption of ASU 2016-13, loans acquired with deteriorated credit quality, referred to under ASC 310-30 as purchased credit impaired loans and under ASU 2016-13 as purchased credit deteriorated loans, were assigned a credit related purchase discount and non-credit related purchase discount at acquisition. Upon adoption of ASU 2016-13 on January 1, 2020, the remaining credit related discount was re-classified to a component of the allowance for credit losses. The remaining non-credit discount will continue to be accreted into income over the remaining lives of the related loans. The following table provides a rollforward of purchased credit deteriorated loans from December 31, 2019 through September 30, 2020 (in thousands): Gross Carrying Value Accretable Nonaccretable Net Carrying December 31, 2019 $ 29,544 $ (4,801) $ (3,828) $ 20,915 Reclassification of discount to allowance for credit losses — — 3,828 3,828 Year-to-date settlements (5,600) 2,240 — (3,360) September 30, 2020 $ 23,944 $ (2,561) $ — $ 21,383
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, 2020 and 2019 (dollars in thousands): Three Months Ended Nine Months Ended 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 2020 Commercial real estate: Owner-occupied — $ — $ — — $ — $ — Non-owner occupied — — — — — — Consumer real estate – mortgage — — — 1 807 807 Construction and land development — — — — — — Commercial and industrial — — — — — — Consumer and other — — — — — — — $ — $ — 1 $ 807 $ 807 2019 Commercial real estate: Owner-occupied 1 $ 314 $ 297 1 $ 314 $ 297 Non-owner occupied — — — — — — 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
Summary of Loan Portfolio Credit Risk Exposure	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, 2020 with the comparative exposures for December 31, 2019 (in thousands): September 30, 2020 Outstanding Principal Balances Unfunded Commitments Total exposure Total Exposure at Lessors of nonresidential buildings $ 3,655,366 $ 916,186 $ 4,571,552 $ 4,578,116 Lessors of residential buildings 1,158,042 795,259 1,953,301 1,599,837 New Housing For-Sale Builders 479,532 613,518 1,093,050 1,090,603 Hotels (except Casino Hotels) and Motels 910,857 127,623 1,038,480 967,771

Stock Options and Restricted _2

Stock Options and Restricted Shares (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 and information regarding expected vesting, contractual terms remaining, intrinsic values and other matters is as follows: Number Weighted-Average Weighted-Average Aggregate Outstanding at December 31, 2019 119,274 $ 23.45 2.85 $ 4,837 (1) Granted — Exercised (9,787) Forfeited — Outstanding at September 30, 2020 109,487 $ 23.44 2.10 $ 1,331 (2) Options exercisable at September 30, 2020 109,487 $ 23.44 2.10 $ 1,331 (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 $64.00 per common share at December 31, 2019 for the 119,274 options that were in-the-money at December 31, 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 $35.59 per common share at September 30, 2020 for the 109,487 options that were in-the-money at September 30, 2020.
Summary of Activity for Unvested Restricted Share Awards	A summary of activity for unvested restricted share awards for the nine months ended September 30, 2020 is as follows: Number Grant Date Unvested at December 31, 2019 555,296 $ 57.04 Shares awarded 265,049 Restrictions lapsed and shares released to associates/directors (198,599) Shares forfeited (1) (22,293) Unvested at September 30, 2020 599,453 $ 57.60 (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, 2020. The table reflects the life-to-date activity for these awards: Grant Group (1) Vesting Period in years Shares Restrictions Lapsed and shares released to participants Shares Forfeited by participants (4) Shares Unvested Time Based Awards 2020 Associates (2) 3 - 5 246,524 116 5,076 241,332 Outside Director Awards (3) 2020 Outside directors 1 18,525 — — 18,525 (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 28, 2021 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, 2020. 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 performance-based vesting restricted stock unit awards outstanding at September 30, 2020: Units Awarded Grant year Named Executive Officers (NEOs) (1) Leadership Team other than NEOs Applicable Performance Periods associated with each tranche Service period per tranche Subsequent holding period per tranche Period in which units to be settled into shares of common stock (2) 2020 136,137 — 204,220 59,648 2020 2 3 2025 2021 2 2 2025 2022 2 1 2025 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 (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, 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, 2020
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, 2020 and December 31, 2019 is included in the following table (in thousands): September 30, 2020 December 31, 2019 Balance Sheet Location Notional Estimated Notional Estimated Interest rate swap agreements: Assets Other assets $ 1,535,297 $ 115,078 $ 1,296,389 $ 43,507 Liabilities Other liabilities 1,535,297 (116,558) 1,296,389 (43,715) Total $ 3,070,594 $ (1,480) $ 2,592,778 $ (208) 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, 2020 and 2019 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 September 30, 2020 2019 2020 2019 Interest rate swap agreements Other noninterest income $ (135) $ (44) $ (1,272) $ (146)
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 interest rate floors in an effort to mitigate the impact of declining interest rates on LIBOR-based variable rate loans. 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. A summary of Pinnacle Financial's cash flow hedge relationships as of September 30, 2020 and December 31, 2019 is as follows (in thousands): September 30, 2020 December 31, 2019 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Estimated Notional Estimated Asset derivatives Interest rate floor Other assets 4.19 —% 2.25% minus 1 month LIBOR $ 1,500,000 $ 134,853 $ 2,800,000 $ 87,422 Liability derivatives Interest rate swaps Other liabilities 1.59 3.09% 3 month LIBOR $ 99,000 $ (4,610) $ 99,000 $ (3,312) 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, 2020 and 2019 were as follows, net of tax (in thousands): Amount of Gain (Loss) Recognized Three Months Ended September 30, Nine Months Ended September 30, Asset derivatives 2020 2019 2020 2019 Interest rate floor - loans $ (3,506) $ 1,951 $ 68,161 $ 9,875 Liability derivatives Interest rate swaps - borrowings $ 480 $ (69) $ (959) $ (1,572) $ (3,026) $ 1,882 $ 67,202 $ 8,303 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 at September 30, 2020 to continue to be highly effective and qualify for hedge accounting during the remaining terms of the original hedging transactions. Losses totaling $156,000 net of tax and $1.9 million net of tax were reclassified from accumulated other comprehensive income (loss) into net income during the three and nine months ended September 30, 2020, respectively, compared to losses totaling 1.1 million net of tax and $946,000 net of tax during the three and nine months ended September 30, 2019, respectively. During the first quarter of 2020, loan interest rate floors entered into in the second quarter of 2019 with a notional amount totaling $1.3 billion and unrealized gains totaling $16.5 million were terminated. These unrealized gains are being amortized into income on a straight line basis through October 2021. Approximately $8.0 million 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 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 available-for-sale securities. The hedging strategy 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, 2020 and December 31, 2019 is as follows (in thousands): September 30, 2020 December 31, 2019 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 7.12 2.26% 3 month LIBOR/Fed Funds $ 708,931 $ (77,214) $ 477,905 $ (40,778) Notional amounts of $477.5 million included in the table receive a variable rate of interest based on three month LIBOR and notional amounts totaling $231.4 million receive a variable rate of interest based on the daily compounded federal funds rate. The effects of Pinnacle Financial's fair value hedge relationships on the income statement during the three and nine months ended September 30, 2020 and 2019 were as follows (in thousands): Location of Loss on Derivative Amount of Loss Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Liability derivatives 2020 2019 2020 2019 Interest rate swaps - securities Interest income on securities $ 4,996 $ (10,888) $ (36,436) $ (37,131) Interest rate swaps - loans Interest income on loans $ — $ — $ — $ (6,915) Location of Gain on Hedged Item Amount of Gain Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Liability derivatives - hedged items 2020 2019 2020 2019 Interest rate swaps - securities Interest income on securities $ (4,996) $ 10,888 $ 36,436 $ 37,131 Interest rate swaps - loans Interest income on loans $ — $ — $ — $ 6,915 The following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges at September 30, 2020 and December 31, 2019 (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, 2020 December 31, 2019 September 30, 2020 December 31, 2019 Line item on the balance sheet Securities available-for-sale $ 853,350 $ 551,789 $ 77,214 $ 40,778 During the three and nine months ended September 30, 2020, amortization expense totaling $1.2 million and $3.3 million, respectively, related to previously terminated fair value hedges 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, 2020
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, 2020 and December 31, 2019, 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 Models with significant observable market parameters Models with significant unobservable market parameters September 30, 2020 Investment securities available-for-sale: U.S. Treasury securities $ 84,464 $ — $ 84,464 $ — U.S. government agency securities 76,859 — 76,859 — Mortgage-backed securities 1,701,212 — 1,701,212 — State and municipal securities 1,327,721 — 1,312,248 15,473 Agency-backed securities 168,839 — 168,839 — Corporate notes and other 104,327 — 104,327 — Total investment securities available-for-sale $ 3,463,422 $ — $ 3,447,949 $ 15,473 Other investments 66,872 — 25,666 41,206 Other assets 265,835 — 265,835 — Total assets at fair value $ 3,796,129 $ — $ 3,739,450 $ 56,679 Other liabilities $ 198,724 $ — $ 198,724 $ — Total liabilities at fair value $ 198,724 $ — $ 198,724 $ — December 31, 2019 Investment securities available-for-sale: U.S. Treasury securities $ 72,867 $ — $ 72,867 $ — U.S. government agency securities 79,692 — 79,692 — Mortgage-backed securities 1,463,907 — 1,463,907 — State and municipal securities 1,714,453 — 1,698,550 15,903 Agency-backed securities 152,972 — 152,972 — Corporate notes and other 56,104 — 56,104 — Total investment securities available-for-sale 3,539,995 — 3,524,092 15,903 Other investments 63,291 — 25,135 38,156 Other assets 134,040 — 134,040 — Total assets at fair value $ 3,737,326 $ — $ 3,683,267 $ 54,059 Other liabilities $ 87,613 $ — $ 87,613 $ — Total liabilities at fair value $ 87,613 $ — $ 87,613 $ —
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, 2020 and December 31, 2019 (in thousands): September 30, 2020 Total carrying value in the consolidated balance sheet Quoted market prices in an active market Models with significant observable market parameters Models with significant unobservable market Other real estate owned $ 19,445 $ — $ — $ 19,445 Collateral dependent loans (1) 77,798 — — 77,798 Total $ 97,243 $ — $ — $ 97,243 December 31, 2019 Other real estate owned $ 29,487 $ — $ — $ 29,487 Impaired loans, net (1) 32,478 — — 32,478 Total $ 61,965 $ — $ — $ 61,965 (1) The carrying value of collateral dependent loans at September 30, 2020 is net of a valuation allowance of $10.7 million, and the carrying value of impaired loans at December 31, 2019 is net of a valuation allowance of $3.3 million.
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, 2020 and September 30, 2019 (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, 2020 2019 2020 2019 Available-for-sale Securities Other Available-for-sale Securities Other Available-for-sale Securities Other Available-for-sale Securities Other Fair value, beginning of period $ 15,295 $ 40,612 $ 15,263 $ 31,522 $ 15,903 $ 38,156 $ 14,595 $ 26,422 Total realized gains included in income 27 456 29 1,264 82 4 87 2,193 Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at period-end 151 — 574 — 631 — 1,583 — Purchases — 1,095 — 1,777 — 4,822 — 6,965 Issuances — — — — — — — — Settlements — (957) — (615) (1,143) (1,776) (399) (1,632) Transfers out of Level 3 — — — — — — — — Fair value, end of period $ 15,473 $ 41,206 $ 15,866 $ 33,948 $ 15,473 $ 41,206 $ 15,866 $ 33,948 Total realized gains (losses) included in income related to financial assets and liabilities still on the consolidated balance sheet at period-end $ 27 $ 456 $ 29 $ 1,264 $ 82 $ 4 $ 87 $ 2,193
Carrying Amounts, Estimated Fair Value and Placement in the Fair Value Hierarchy of Financial Instruments	The following tables present the carrying amounts, estimated fair value and placement in the fair value hierarchy of Pinnacle Financial's financial instruments at September 30, 2020 and December 31, 2019. 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): Carrying/ Estimated Fair Value (1) Quoted market prices in an active market Models with significant observable market parameters Models with significant unobservable market September 30, 2020 Financial assets: Securities held-to-maturity $ 1,039,650 $ 1,060,847 $ — $ 1,060,847 $ — Loans, net 22,188,764 22,483,708 — — 22,483,708 Consumer loans held-for-sale 82,748 84,877 — 84,877 — Commercial loans held-for-sale 12,290 12,606 — 12,606 — Financial liabilities: Deposits and securities sold under agreements to repurchase 26,671,015 25,804,207 — — 25,804,207 Federal Home Loan Bank advances 1,287,738 1,428,059 — — 1,428,059 Subordinated debt and other borrowings 670,273 681,964 — — 681,964 Off-balance sheet instruments: Commitments to extend credit (2) 9,374,780 22,784 — — 22,784 Carrying/ Estimated Fair Value (1) Quoted market prices in an active market Models with significant observable market parameters Models with significant unobservable market December 31, 2019 Financial assets: Securities held-to-maturity $ 188,996 $ 201,217 $ — $ 201,217 $ — Loans, net 19,693,099 19,717,845 — — 19,717,845 Consumer loans held-for-sale 81,820 82,986 — 82,986 — Commercial loans held-for-sale 17,585 17,836 — 17,836 — Financial liabilities: Deposits and securities sold under agreements to repurchase 20,307,382 19,647,392 — — 19,647,392 Federal Home Loan Bank advances 2,062,534 2,078,514 — — 2,078,514 Subordinated debt and other borrowings 749,080 712,220 — — 712,220 Off-balance sheet instruments: Commitments to extend credit (2) 8,141,920 3,786 — — 3,786 (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, including both commitments for unfunded loans and standby letters of credit. In making this evaluation, Pinnacle Financial utilizes credit loss expectations on funded loans from our allowance for credit losses methodology and evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at September 30, 2020 and December 31, 2019, Pinnacle Financial included in other liabilities $21.2 million and $2.4 million, respectively, representing expected credit losses on off-balance sheet commitments, which are reflected in the estimated fair values of the related commitments. Also included in the fair values at September 30, 2020 and December 31, 2019 are unamortized fees related to these commitments of $1.6 million and $1.4 million, respectively.

Regulatory Matters (Tables)

Regulatory Matters (Tables)	3 Months Ended
	Sep. 30, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Summary of Regulatory Capital Requirement	Management believes, as of September 30, 2020, 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 Minimum Amount Ratio Amount Ratio Amount Ratio At September 30, 2020 Total capital to risk weighted assets: Pinnacle Financial $ 3,578,436 14.2 % $ 2,015,196 8.0 % $ 2,518,994 10.0 % Pinnacle Bank $ 3,146,468 12.6 % $ 2,005,334 8.0 % $ 2,506,667 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 2,702,540 10.7 % $ 1,511,397 6.0 % $ 2,015,196 8.0 % Pinnacle Bank $ 2,819,572 11.3 % $ 1,504,000 6.0 % $ 2,005,334 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 2,485,291 9.9 % $ 1,133,547 4.5 % NA NA Pinnacle Bank $ 2,819,450 11.3 % $ 1,128,000 4.5 % $ 1,629,333 6.5 % Tier 1 capital to average assets (*): Pinnacle Financial $ 2,702,540 8.5 % $ 1,273,124 4.0 % NA NA Pinnacle Bank $ 2,819,572 8.9 % $ 1,269,171 4.0 % $ 1,586,464 5.0 % At December 31, 2019 Total capital to risk weighted assets: Pinnacle Financial $ 3,159,375 13.2 % $ 1,912,885 8.0 % $ 2,391,106 10.0 % Pinnacle Bank $ 2,906,853 12.2 % $ 1,906,839 8.0 % $ 2,383,549 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 2,319,234 9.7 % $ 1,434,664 6.0 % $ 1,912,885 8.0 % Pinnacle Bank $ 2,679,713 11.2 % $ 1,430,129 6.0 % $ 1,906,839 8.0 % Actual Minimum Capital Minimum Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 2,319,112 9.7 % $ 1,075,998 4.5 % NA NA Pinnacle Bank $ 2,679,590 11.2 % $ 1,072,597 4.5 % $ 1,549,307 6.5 % Tier 1 capital to average assets (*): Pinnacle Financial $ 2,319,234 9.1 % $ 1,021,836 4.0 % NA NA Pinnacle Bank $ 2,679,713 10.5 % $ 1,019,210 4.0 % $ 1,274,012 5.0 % (*) Average assets for the above calculations were based on the most recent quarter.

Other borrowings (Tables)

Other borrowings (Tables)	9 Months Ended
	Sep. 30, 2020
Subordinated Debt [Abstract]
Schedule of 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, and Pinnacle Financial and Pinnacle Bank have entered into certain other subordinated debt agreements. On April 22, 2020, Pinnacle Financial established a credit facility with the Federal Reserve Bank in conjunction with the SBA Paycheck Protection Program, with available borrowing capacity equal to the outstanding balance of Paycheck Protection Program loans, which totaled approximately $2.3 billion at September 30, 2020. There are no amounts outstanding on this facility at September 30, 2020. These instruments are outlined below as of September 30, 2020 (in thousands): Name Date Maturity Total Debt Outstanding Interest Rate at September 30, 2020 Coupon Structure Trust preferred securities Pinnacle Statutory Trust I December 29, 2003 December 30, 2033 $ 10,310 3.05 % 30-day LIBOR + 2.80% Pinnacle Statutory Trust II September 15, 2005 September 30, 2035 20,619 1.62 % 30-day LIBOR + 1.40% Pinnacle Statutory Trust III September 7, 2006 September 30, 2036 20,619 1.87 % 30-day LIBOR + 1.65% Pinnacle Statutory Trust IV October 31, 2007 September 30, 2037 30,928 3.10 % 30-day LIBOR + 2.85% BNC Capital Trust I April 3, 2003 April 15, 2033 5,155 3.53 % 30-day LIBOR + 3.25% BNC Capital Trust II March 11, 2004 April 7, 2034 6,186 3.13 % 30-day LIBOR + 2.85% BNC Capital Trust III September 23, 2004 September 23, 2034 5,155 2.68 % 30-day LIBOR + 2.40% BNC Capital Trust IV September 27, 2006 December 31, 2036 7,217 1.92 % 30-day LIBOR + 1.70% Valley Financial Trust I June 26, 2003 June 26, 2033 4,124 3.33 % 30-day LIBOR + 3.10% Valley Financial Trust II September 26, 2005 December 15, 2035 7,217 1.74 % 30-day LIBOR + 1.49% Valley Financial Trust III December 15, 2006 January 30, 2037 5,155 2.00 % 30-day LIBOR + 1.73% Southcoast Capital Trust III August 5, 2005 September 30, 2035 10,310 1.72 % 30-day LIBOR + 1.50% Subordinated Debt Pinnacle Bank Subordinated Notes July 30, 2015 July 30, 2025 60,000 3.38 % 3-month LIBOR + 3.128% Pinnacle Bank Subordinated Notes March 10, 2016 July 30, 2025 70,000 3.38 % 3-month LIBOR + 3.128% Pinnacle Financial Subordinated Notes November 16, 2016 November 16, 2026 120,000 5.25 % Fixed (1) Pinnacle Financial Subordinated Notes September 11, 2019 September 15, 2029 300,000 4.13 % Fixed (2) Debt issuance costs and fair value adjustments (12,722) Total subordinated debt and other borrowings $ 670,273 (1) Migrates to three month LIBOR + 3.884% beginning November 16, 2021 through the end of the term. (2) Migrates to three month LIBOR + 2.775% beginning September 15, 2024 through the end of the term.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details)	Jul. 02, 2019USD ($)	Mar. 31, 2020USD ($)	Sep. 30, 2020USD ($)market	Jan. 01, 2020USD ($)	Dec. 31, 2019USD ($)
Accounting Policies [Abstract]
Number of markets entity operates | market			12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact of adopting ASC 326			$ 38,102,000
Off-Balance Sheet, Credit Loss, Liability			$ 21,200,000	$ 8,800,000	$ 2,400,000
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	45,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	$ 134,300,000
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle		$ 31,800,000
Impact of adopting ASC 326			$ 34,300,000
Off-Balance Sheet, Credit Loss, Liability				8,800,000
Deferred Taxes Recorded due to Cumulative Change in Accounting Principle				$ 11,300,000
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 3,800,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2020		Sep. 30, 2019
Cash Transactions:
Interest paid					$ 179,163		$ 216,261
Income taxes paid, net					89,858		61,238
Operating lease payments					10,077		10,193
Noncash Transactions:
Loans charged-off to the allowance for credit losses		$ 15,029	$ 6,780		35,724		21,328
Loans foreclosed upon and transferred to other real estate owned					3,435		16,870
Loans foreclosed upon and transferred to other assets					25		93
Fixed assets transferred to other real estate owned					0		5,126
Available-for-sale securities transferred to held-to-maturity portfolio				$ 179,800	873,613		0
Right of use assets recognized during the period in exchange for lease obligations	$ 79,900				$ 5,269	[1]	$ 82,856	[1]
[1]	(1) Includes $79.9 million recognized upon initial adoption of ASU 2016-02 on January 1, 2019.

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic net income per common share calculation:
Net income available to common shareholders	$ 106,847	$ 110,521	$ 197,647	$ 304,802
Denominator - Weighted average common shares outstanding (in shares)	75,240,664	76,301,010	75,417,663	76,480,757
Basic net income per common share (in dollars per share)	$ 1.42	$ 1.45	$ 2.62	$ 3.99
Diluted net income per common share calculation:
Numerator – Net income available to common shareholders	$ 106,847	$ 110,521	$ 197,647	$ 304,802
Denominator - Weighted average common shares outstanding (in shares)	75,241,000	76,301,000	75,418,000	76,481,000
Dilutive shares contingently issuable (in shares)	119,000	255,000	127,000	280,000
Weighted average diluted common shares outstanding (in shares)	75,360,033	76,556,309	75,544,677	76,761,167
Diluted net income per common share (in dollars per share)	$ 1.42	$ 1.44	$ 2.62	$ 3.97

Equity method investment - Fina

Equity method investment - Financial Position and Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Assets	$ 33,824,931		$ 33,824,931		$ 27,805,496
Liabilities	29,037,623		29,037,623		23,449,748
Liabilities and Equity	33,824,931		33,824,931		27,805,496
Bankers Healthcare Group, LLC
Schedule of Equity Method Investments [Line Items]
Assets	1,249,530		1,249,530		840,398
Liabilities	1,006,462		1,006,462		641,037
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	243,068		243,068		199,361
Liabilities and Equity	1,249,530		1,249,530		$ 840,398
Revenues	128,510	$ 108,770	319,244	$ 279,569
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 51,459	$ 61,364	$ 121,604	$ 156,064

Equity method investment - Narr

Equity method investment - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Technology, trade name and customer relationship intangibles	$ 44,713,000		$ 44,713,000		$ 51,130,000
Amortization of Intangible Assets	2,417,000	$ 2,430,000	7,416,000	$ 7,012,000
Dividends received from equity method investment			47,981,000	49,940,000
Bankers Healthcare Group, LLC
Schedule of Equity Method Investments [Line Items]
Technology, trade name and customer relationship intangibles	7,900,000		7,900,000		$ 8,800,000
Amortization of Intangible Assets	293,000	475,000	880,000	1,400,000
Accretion income	535,000	630,000	1,600,000	2,000,000
Dividends received from equity method investment	40,000,000	9,000,000	48,000,000	49,900,000
Payments to Acquire Loans Held-for-investment	$ 50,200,000	$ 0	$ 50,200,000	$ 0

Securities Securities - Narrati

Securities Securities - Narrative (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2020	Sep. 30, 2019	Jan. 01, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities transferred to held-to-maturity portfolio			$ 179,800,000	$ 873,613,000	$ 0
Unrealized after tax gain on available for sale securities transferred to the held to maturity portfolio	$ 69,000,000			69,000,000
Securities pledged as collateral to secure public funds and other deposits or securities sold under agreements to repurchase	1,200,000,000			1,200,000,000
Secured borrowing under agreement to repurchase	127,100,000			127,100,000
Accumulated unrealized losses	35,288,000			35,288,000			$ 17,785,000
Fair value of securities	1,151,426,000			1,151,426,000			1,297,321,000
Allowance for credit losses - securities held-to-maturity	(191,000)			(191,000)		$ (10,000)	$ 0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	481,000	$ 308,000		728,000	(4,438,000)
Proceeds from Sale of Available-for-sale Securities				145,631,000	$ 626,097,000
Securities pledged as collateral
Debt Securities, Available-for-sale [Line Items]
Secured borrowing under agreement to repurchase	$ 127,100,000			$ 127,100,000

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($)	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Securities available-for-sale [Abstract]
Amortized Cost	$ 3,394,673,000		$ 3,491,633,000
Gross Unrealized Gains	103,496,000		66,147,000
Gross Unrealized Losses	34,747,000		17,785,000
Securities available-for-sale, at fair value	3,463,422,000		3,539,995,000
Available-for-sale, Amortized Cost [Abstract]
Due in one year or less	85,090,000
Due in one year to five years	12,059,000
Due in five years to ten years	175,812,000
Due after ten years	1,317,843,000
Mortgage-backed securities	1,634,329,000
Asset-backed securities	169,540,000
Amortized Cost	3,394,673,000
Available-for-sale, Fair Value [Abstract]
Due in one year or less	85,120,000
Due in one year to five years	12,446,000
Due in five years to ten years	181,102,000
Due after ten years	1,314,703,000
Mortgage-backed securities	1,701,212,000
Asset-backed securities	168,839,000
Securities available-for-sale, at fair value	3,463,422,000		3,539,995,000
Securities held-to-maturity [Abstract]
Amortized Cost	1,039,841,000		188,996,000
Allowance for credit losses - securities held-to-maturity	(191,000)	$ (10,000)	0
HeldToMaturitySecurities, net of allowance for credit losses	1,039,650,000		188,996,000
Gross Unrealized Gains	23,814,000		12,221,000
Gross Unrealized Losses	2,808,000		0
Securities held-to-maturity, fair value	1,060,847,000		201,217,000
Held-to-maturity, Amortized Cost [Abstract]
Due in one year or less	0
Due in one year to five years	1,409,000
Due in five years to ten years	7,209,000
Due after ten years	1,031,223,000
Mortgage-backed securities	0
Asset-backed securities	0
Amortized Cost	1,039,841,000		188,996,000
Held-to-maturity, Fair Value [Abstract]
Due in one year or less	0
Due in one year to five years	1,482,000
Due in five years to ten years	7,293,000
Due after ten years	1,052,072,000
Mortgage-backed securities	0
Asset-backed securities	0
Fair Value	1,060,847,000		201,217,000
U.S. Treasury securities
Securities available-for-sale [Abstract]
Amortized Cost	84,438,000		72,862,000
Gross Unrealized Gains	28,000		19,000
Gross Unrealized Losses	2,000		14,000
Securities available-for-sale, at fair value	84,464,000		72,867,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	84,464,000		72,867,000
U.S. government agency securities
Securities available-for-sale [Abstract]
Amortized Cost	75,345,000		80,096,000
Gross Unrealized Gains	1,543,000		306,000
Gross Unrealized Losses	29,000		710,000
Securities available-for-sale, at fair value	76,859,000		79,692,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	76,859,000		79,692,000
Mortgage-backed securities
Securities available-for-sale [Abstract]
Amortized Cost	1,634,329,000		1,458,894,000
Gross Unrealized Gains	69,311,000		12,789,000
Gross Unrealized Losses	2,428,000		7,776,000
Securities available-for-sale, at fair value	1,701,212,000		1,463,907,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	1,701,212,000		1,463,907,000
State and municipal securities
Securities available-for-sale [Abstract]
Amortized Cost	1,324,383,000		1,669,606,000
Gross Unrealized Gains	31,081,000		52,096,000
Gross Unrealized Losses	27,743,000		7,249,000
Securities available-for-sale, at fair value	1,327,721,000		1,714,453,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	1,327,721,000		1,714,453,000
Securities held-to-maturity [Abstract]
Amortized Cost	1,039,841,000		188,996,000
Gross Unrealized Gains	23,814,000		12,221,000
Gross Unrealized Losses	2,808,000		0
Securities held-to-maturity, fair value	1,060,847,000		201,217,000
Held-to-maturity, Amortized Cost [Abstract]
Amortized Cost	1,039,841,000		188,996,000
Held-to-maturity, Fair Value [Abstract]
Fair Value	1,060,847,000		201,217,000
Asset-backed securities
Securities available-for-sale [Abstract]
Amortized Cost	169,540,000		153,963,000
Gross Unrealized Gains	470,000		302,000
Gross Unrealized Losses	1,171,000		1,293,000
Securities available-for-sale, at fair value	168,839,000		152,972,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	168,839,000		152,972,000
Corporate notes and other
Securities available-for-sale [Abstract]
Amortized Cost	106,638,000		56,212,000
Gross Unrealized Gains	1,063,000		635,000
Gross Unrealized Losses	3,374,000		743,000
Securities available-for-sale, at fair value	104,327,000		56,104,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	$ 104,327,000		$ 56,104,000

Securities- Unrealized Losses (

Securities- Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	$ 475,732	$ 781,054
Investments with an unrealized loss of less than 12 months, unrealized losses	5,889	7,851
Investments with an unrealized loss of 12 months or longer, fair value	675,694	516,267
Investments with an unrealized loss of 12 months or longer, unrealized losses	29,399	9,934
Total investments with an unrealized loss, fair value	1,151,426	1,297,321
Total investments with an unrealized loss, unrealized losses	35,288	17,785
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	25,973	40,505
Investments with an unrealized loss of less than 12 months, unrealized losses	2	14
Investments with an unrealized loss of 12 months or longer, fair value	0	0
Investments with an unrealized loss of 12 months or longer, unrealized losses	0	0
Total investments with an unrealized loss, fair value	25,973	40,505
Total investments with an unrealized loss, unrealized losses	2	14
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	10,576	1,222
Investments with an unrealized loss of less than 12 months, unrealized losses	4	1
Investments with an unrealized loss of 12 months or longer, fair value	6,360	30,892
Investments with an unrealized loss of 12 months or longer, unrealized losses	25	709
Total investments with an unrealized loss, fair value	16,936	32,114
Total investments with an unrealized loss, unrealized losses	29	710
Mortgage-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	138,532	458,881
Investments with an unrealized loss of less than 12 months, unrealized losses	1,746	5,102
Investments with an unrealized loss of 12 months or longer, fair value	39,350	163,767
Investments with an unrealized loss of 12 months or longer, unrealized losses	682	2,674
Total investments with an unrealized loss, fair value	177,882	622,648
Total investments with an unrealized loss, unrealized losses	2,428	7,776
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	199,365	204,958
Investments with an unrealized loss of less than 12 months, unrealized losses	3,608	1,938
Investments with an unrealized loss of 12 months or longer, fair value	539,131	244,884
Investments with an unrealized loss of 12 months or longer, unrealized losses	24,676	5,311
Total investments with an unrealized loss, fair value	738,496	449,842
Total investments with an unrealized loss, unrealized losses	28,284	7,249
Asset-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	74,977	75,488
Investments with an unrealized loss of less than 12 months, unrealized losses	355	796
Investments with an unrealized loss of 12 months or longer, fair value	67,973	59,816
Investments with an unrealized loss of 12 months or longer, unrealized losses	816	497
Total investments with an unrealized loss, fair value	142,950	135,304
Total investments with an unrealized loss, unrealized losses	1,171	1,293
Corporate notes
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	26,309	0
Investments with an unrealized loss of less than 12 months, unrealized losses	174	0
Investments with an unrealized loss of 12 months or longer, fair value	22,880	16,908
Investments with an unrealized loss of 12 months or longer, unrealized losses	3,200	743
Total investments with an unrealized loss, fair value	49,189	16,908
Total investments with an unrealized loss, unrealized losses	$ 3,374	$ 743

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of loan portfolio as commercial loan	82.00%		82.00%
Risk rated loans	$ 1,000		$ 1,000
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	$ 9,700		$ 9,700		$ 10,600
Amount drawn from loans and other extensions of credit granted	7,100		7,100		6,800
Commercial loans held-for-sale	12,290		12,290		17,585
Mortgage loans held-for-sale	62,600		62,600		61,600
Loans sold			1,300,000	$ 788,100
Gain (Loss) on Sale of Mortgage Loans	19,500	$ 7,400	47,655	$ 18,291
Loans and Leases Receivable, Net of Deferred Income	22,477,409		22,477,409		$ 19,787,876
Paycheck Protection Program [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 2,300,000		$ 2,300,000
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of credit exposure to risk based capital	86.70%		86.70%		83.60%
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	268.80%		268.80%		268.30%

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 22,477,409	$ 19,787,876
Loan losses, allowance	288,645	94,777
Loans and Leases Receivable, Net Amount	22,188,764	19,693,099
Commercial real estate- owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,748,075	2,669,766
Commercial real estate- Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,220,452	5,039,452
Consumer real estate – mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,041,019	3,068,625
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,728,439	2,430,483
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	8,395,963	6,290,296
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 343,461	$ 289,254

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - Loan Classification by Risk Rating Category (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
2020		$ 6,786,389
2019		4,764,211
2018		3,111,266
2017		1,740,916
2016		1,371,982
Prior		1,327,309
Revolving Loans		3,375,336
Total		22,477,409	$ 19,787,876
Potential problem loans not included in nonperforming assets		215,700	276,000
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020		6,517,728
2019		4,508,512
2018		2,894,248
2017		1,527,644
2016		1,194,665
Prior		1,160,118
Revolving Loans		3,232,962
Total		21,035,877	19,299,393
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020		197,051
2019		219,176
2018		182,887
2017		179,456
2016		161,092
Prior		136,826
Revolving Loans		77,953
Total		1,154,441	148,267
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	[1]	56,110
2019	[1]	28,241
2018	[1]	30,933
2017	[1]	26,022
2016	[1]	10,829
Prior	[1]	9,589
Revolving Loans	[1]	53,977
Total	[1]	215,701	278,611
Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		15,500
2019		8,282
2018		3,198
2017		7,794
2016		5,396
Prior		20,776
Revolving Loans		10,444
Total		71,390	61,605
Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		0
Revolving Loans		0
Total		0	0
Commercial real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total			7,709,218
Commercial real estate – mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total			7,499,725
Commercial real estate – mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total			51,147
Commercial real estate – mortgage | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total	[1]		139,518
Commercial real estate – mortgage | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total			18,828
Commercial real estate – mortgage | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total			0
Commercial real estate- owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020		540,102
2019		491,765
2018		529,891
2017		378,021
2016		383,048
Prior		316,101
Revolving Loans		109,147
Total		2,748,075	2,669,766
Commercial real estate- owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020		514,127
2019		473,410
2018		497,269
2017		347,792
2016		368,441
Prior		304,692
Revolving Loans		79,208
Total		2,584,939
Commercial real estate- owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020		3,349
2019		11,949
2018		23,805
2017		12,775
2016		3,901
Prior		5,698
Revolving Loans		0
Total		61,477
Commercial real estate- owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	[1]	21,725
2019	[1]	6,251
2018	[1]	7,828
2017	[1]	15,991
2016	[1]	8,986
Prior	[1]	2,119
Revolving Loans	[1]	28,134
Total	[1]	91,034
Commercial real estate- owner occupied | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		901
2019		155
2018		989
2017		1,463
2016		1,720
Prior		3,592
Revolving Loans		1,805
Total		10,625
Commercial real estate- owner occupied | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		0
Revolving Loans		0
Total		0
Commercial real estate- Non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020		1,183,778
2019		1,158,328
2018		893,572
2017		724,708
2016		656,206
Prior		538,524
Revolving Loans		65,336
Total		5,220,452	5,039,452
Commercial real estate- Non-owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020		1,011,392
2019		1,035,694
2018		765,605
2017		560,797
2016		509,620
Prior		403,696
Revolving Loans		54,308
Total		4,341,112
Commercial real estate- Non-owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020		165,690
2019		120,702
2018		121,523
2017		157,652
2016		144,731
Prior		128,007
Revolving Loans		11,028
Total		849,333
Commercial real estate- Non-owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020		6,696
2019	[1]	1,495
2018	[1]	5,699
2017	[1]	6,120
2016	[1]	1,015
Prior	[1]	2,972
Revolving Loans		0
Total	[1]	23,997
Commercial real estate- Non-owner occupied | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		437
2018		745
2017		139
2016		840
Prior		3,849
Revolving Loans		0
Total		6,010
Commercial real estate- Non-owner occupied | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		0
Revolving Loans		0
Total		0
Consumer real estate – mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2020		462,723
2019		543,986
2018		376,295
2017		186,690
2016		145,282
Prior		355,449
Revolving Loans		970,594
Total		3,041,019	3,068,625
Consumer real estate – mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020		462,452
2019		539,068
2018		372,363
2017		183,725
2016		142,646
Prior		341,108
Revolving Loans		955,781
Total		2,997,143	3,019,203
Consumer real estate – mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020		102
2019		2,695
2018		2,929
2017		644
2016		0
Prior		1,040
Revolving Loans		8,739
Total		16,149	13,787
Consumer real estate – mortgage | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019	[1]	546
2018		0
2017	[1]	895
2016	[1]	9
Prior	[1]	2,274
Revolving Loans	[1]	2,108
Total	[1]	5,832	10,969
Consumer real estate – mortgage | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		169
2019		1,677
2018		1,003
2017		1,426
2016		2,627
Prior		11,027
Revolving Loans		3,966
Total		21,895	24,666
Consumer real estate – mortgage | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		0
Revolving Loans		0
Total		0	0
Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
2020		856,959
2019		1,243,851
2018		497,237
2017		77,229
2016		24,713
Prior		12,592
Revolving Loans		15,858
Total		2,728,439	2,430,483
Construction and land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020		849,025
2019		1,209,363
2018		471,069
2017		77,146
2016		20,229
Prior		10,394
Revolving Loans		15,858
Total		2,653,084	2,422,347
Construction and land development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020		6,924
2019		33,253
2018		26,062
2017		0
2016		4,244
Prior		0
Revolving Loans		0
Total		70,483	2,816
Construction and land development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	[1]	619
2019	[1]	681
2018	[1]	29
2017		0
2016	[1]	240
Prior	[1]	150
Revolving Loans		0
Total	[1]	1,719	3,042
Construction and land development | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		391
2019		554
2018		77
2017		83
2016		0
Prior		2,048
Revolving Loans		0
Total		3,153	2,278
Construction and land development | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		0
Revolving Loans		0
Total		0	0
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2020		3,629,020
2019		1,302,307
2018		806,087
2017		365,882
2016		158,086
Prior		102,499
Revolving Loans		2,032,082
Total		8,395,963	6,290,296
Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020		3,566,925
2019		1,227,003
2018		779,760
2017		349,805
2016		149,094
Prior		98,086
Revolving Loans		1,946,224
Total		8,116,897	6,069,757
Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020		20,986
2019		50,577
2018		8,568
2017		8,385
2016		8,216
Prior		2,081
Revolving Loans		58,186
Total		156,999	79,819
Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	[1]	27,070
2019	[1]	19,268
2018	[1]	17,377
2017	[1]	3,016
2016	[1]	579
Prior	[1]	2,074
Revolving Loans	[1]	23,735
Total	[1]	93,119	125,035
Commercial and industrial | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		14,039
2019		5,459
2018		382
2017		4,676
2016		197
Prior		258
Revolving Loans		3,937
Total		28,948	15,685
Commercial and industrial | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		0
Revolving Loans		0
Total		0	0
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2020		113,807
2019		23,974
2018		8,184
2017		8,386
2016		4,647
Prior		2,144
Revolving Loans		182,319
Total		343,461	289,254
Consumer and other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020		113,807
2019		23,974
2018		8,182
2017		8,379
2016		4,635
Prior		2,142
Revolving Loans		181,583
Total		342,702	288,361
Consumer and other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		0
Revolving Loans		0
Total		0	698
Consumer and other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		0
Revolving Loans		0
Total	[1]	0	47
Consumer and other | Substandard-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		2
2017		7
2016		12
Prior		2
Revolving Loans		736
Total		759	148
Consumer and other | Doubtful-nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		0
Revolving Loans		0
Total		$ 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 $215.7 million at September 30, 2020, compared to $276.0 million at December 31, 2019.

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Financing Receivables Past Due (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total past due	$ 55,000	$ 62,338
Current	22,422,409	19,725,538
Loans and Leases Receivable, Net of Deferred Income	22,477,409	19,787,876
30-59 days past due
Financing Receivable, Past Due [Line Items]
Total past due	22,707	28,745
60-89 days past due
Financing Receivable, Past Due [Line Items]
Total past due	8,506	12,333
90 days or more past due
Financing Receivable, Past Due [Line Items]
Total past due	23,787	21,260
Commercial real estate- owner occupied
Financing Receivable, Past Due [Line Items]
Total past due	8,006	6,958
Current	2,740,069	2,662,808
Loans and Leases Receivable, Net of Deferred Income	2,748,075	2,669,766
Commercial real estate- owner occupied | 30-59 days past due
Financing Receivable, Past Due [Line Items]
Total past due	3,365	2,307
Commercial real estate- owner occupied | 60-89 days past due
Financing Receivable, Past Due [Line Items]
Total past due	415	2,932
Commercial real estate- owner occupied | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total past due	4,226	1,719
Commercial real estate- Non-owner occupied
Financing Receivable, Past Due [Line Items]
Total past due	8,893	10,613
Current	5,211,559	5,028,839
Loans and Leases Receivable, Net of Deferred Income	5,220,452	5,039,452
Commercial real estate- Non-owner occupied | 30-59 days past due
Financing Receivable, Past Due [Line Items]
Total past due	1,612	3,156
Commercial real estate- Non-owner occupied | 60-89 days past due
Financing Receivable, Past Due [Line Items]
Total past due	1,928	3,641
Commercial real estate- Non-owner occupied | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total past due	5,353	3,816
Consumer real estate – mortgage
Financing Receivable, Past Due [Line Items]
Total past due	15,161	21,107
Current	3,025,858	3,047,518
Loans and Leases Receivable, Net of Deferred Income	3,041,019	3,068,625
Consumer real estate – mortgage | 30-59 days past due
Financing Receivable, Past Due [Line Items]
Total past due	7,852	11,646
Consumer real estate – mortgage | 60-89 days past due
Financing Receivable, Past Due [Line Items]
Total past due	1,338	2,157
Consumer real estate – mortgage | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total past due	5,971	7,304
Construction and land development
Financing Receivable, Past Due [Line Items]
Total past due	4,448	3,590
Current	2,723,991	2,426,893
Loans and Leases Receivable, Net of Deferred Income	2,728,439	2,430,483
Construction and land development | 30-59 days past due
Financing Receivable, Past Due [Line Items]
Total past due	2,417	1,392
Construction and land development | 60-89 days past due
Financing Receivable, Past Due [Line Items]
Total past due	0	711
Construction and land development | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total past due	2,031	1,487
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total past due	16,344	17,316
Current	8,379,619	6,272,980
Loans and Leases Receivable, Net of Deferred Income	8,395,963	6,290,296
Commercial and industrial | 30-59 days past due
Financing Receivable, Past Due [Line Items]
Total past due	6,615	8,474
Commercial and industrial | 60-89 days past due
Financing Receivable, Past Due [Line Items]
Total past due	4,743	2,478
Commercial and industrial | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total past due	4,986	6,364
Consumer and other
Financing Receivable, Past Due [Line Items]
Total past due	2,148	2,754
Current	341,313	286,500
Loans and Leases Receivable, Net of Deferred Income	343,461	289,254
Consumer and other | 30-59 days past due
Financing Receivable, Past Due [Line Items]
Total past due	846	1,770
Consumer and other | 60-89 days past due
Financing Receivable, Past Due [Line Items]
Total past due	82	414
Consumer and other | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total past due	$ 1,220	$ 570

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 285,372	$ 90,253	$ 94,777	$ 83,575
Impact of adopting ASC 326			38,102
Charged-off loans	(15,029)	(6,780)	(35,724)	(21,328)
Recovery of previously charged-off loans	1,973	1,914	7,128	8,761
Provision for Loan and Lease Losses	16,329	8,260	184,362	22,639
Ending Balance	288,645	93,647	288,645	93,647
Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Impact of adopting ASC 326			34,300
Commercial real estate- owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	38,803	12,174	13,406	11,297
Impact of adopting ASC 326			264
Charged-off loans	(186)	(40)	(1,247)	(1,626)
Recovery of previously charged-off loans	47	135	272	211
Provision for Loan and Lease Losses	(2,238)	(112)	23,731	2,275
Ending Balance	36,426	12,157	36,426	12,157
Commercial real estate- Non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	68,426	18,652	19,963	15,649
Impact of adopting ASC 326			(4,740)
Charged-off loans	(222)	(62)	(485)	(75)
Recovery of previously charged-off loans	432	74	631	962
Provision for Loan and Lease Losses	1,223	1,796	54,490	3,924
Ending Balance	69,859	20,460	69,859	20,460
Consumer real estate – mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	29,358	8,489	8,054	7,670
Impact of adopting ASC 326			21,029
Charged-off loans	(907)	(194)	(3,033)	(1,124)
Recovery of previously charged-off loans	297	901	971	1,642
Provision for Loan and Lease Losses	3,201	(1,426)	4,928	(418)
Ending Balance	31,949	7,770	31,949	7,770
Construction and land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	41,897	11,206	12,662	11,128
Impact of adopting ASC 326			(3,144)
Charged-off loans	0	(14)	0	(18)
Recovery of previously charged-off loans	7	97	100	238
Provision for Loan and Lease Losses	(682)	585	31,604	526
Ending Balance	41,222	11,874	41,222	11,874
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	100,610	37,436	36,112	31,731
Impact of adopting ASC 326			23,040
Charged-off loans	(12,984)	(5,082)	(27,982)	(13,842)
Recovery of previously charged-off loans	799	407	3,798	4,749
Provision for Loan and Lease Losses	13,783	1,814	67,240	11,937
Ending Balance	102,208	34,575	102,208	34,575
Consumer and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	6,278	2,114	3,595	5,423
Impact of adopting ASC 326			2,638
Charged-off loans	(730)	(1,388)	(2,977)	(4,643)
Recovery of previously charged-off loans	391	300	1,356	959
Provision for Loan and Lease Losses	1,042	3,278	2,369	2,565
Ending Balance	6,981	4,304	6,981	4,304
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	0	182	985	677
Impact of adopting ASC 326			(985)
Charged-off loans	0	0	0	0
Recovery of previously charged-off loans	0	0	0	0
Provision for Loan and Lease Losses	0	2,325	0	1,830
Ending Balance	$ 0	$ 2,507	$ 0	$ 2,507

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Details on Allowance for Loan Losses and Recorded Investment by Loan Classification and Impairment Evaluation Method (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment				$ 90,512
Individually evaluated for impairment				3,280
Total allowance for loan losses		$ 288,645	$ 285,372	94,777	$ 93,647	$ 90,253	$ 83,575
Collectively evaluated for impairment				19,708,817
Individually evaluated for impairment		88,543		58,144
Loans and Leases Receivable, Net of Deferred Income		22,477,409		19,787,876
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		59,785
Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		28,692
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		66
Loans acquired with deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]			0
Loans acquired with deteriorated credit quality				20,915
Commercial real estate – mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment				32,134
Individually evaluated for impairment				1,235
Total allowance for loan losses				33,369
Collectively evaluated for impairment				7,681,608
Individually evaluated for impairment				18,122
Loans and Leases Receivable, Net of Deferred Income				7,709,218
Commercial real estate – mortgage | Loans acquired with deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]			0
Loans acquired with deteriorated credit quality				9,488
Commercial real estate- owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses		36,426	38,803	13,406	12,157	12,174	11,297
Individually evaluated for impairment		14,955
Loans and Leases Receivable, Net of Deferred Income		2,748,075		2,669,766
Commercial real estate- owner occupied | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		14,955
Commercial real estate- owner occupied | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Commercial real estate- owner occupied | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Commercial real estate- Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses		69,859	68,426	19,963	20,460	18,652	15,649
Individually evaluated for impairment		11,294
Loans and Leases Receivable, Net of Deferred Income		5,220,452		5,039,452
Commercial real estate- Non-owner occupied | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		11,294
Commercial real estate- Non-owner occupied | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Commercial real estate- Non-owner occupied | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Consumer real estate – mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment				6,762
Individually evaluated for impairment				1,292
Total allowance for loan losses		31,949	29,358	8,054	7,770	8,489	7,670
Collectively evaluated for impairment				3,036,922
Individually evaluated for impairment		27,122		25,018
Loans and Leases Receivable, Net of Deferred Income		3,041,019		3,068,625
Consumer real estate – mortgage | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		27,122
Consumer real estate – mortgage | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Consumer real estate – mortgage | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Consumer real estate – mortgage | Loans acquired with deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]			0
Loans acquired with deteriorated credit quality				6,685
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment				12,629
Individually evaluated for impairment				33
Total allowance for loan losses		41,222	41,897	12,662	11,874	11,206	11,128
Collectively evaluated for impairment				2,426,901
Individually evaluated for impairment		4,362		561
Loans and Leases Receivable, Net of Deferred Income		2,728,439		2,430,483
Construction and land development | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		4,362
Construction and land development | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Construction and land development | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Construction and land development | Loans acquired with deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]			0
Loans acquired with deteriorated credit quality				3,021
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment				35,401
Individually evaluated for impairment				711
Total allowance for loan losses		102,208	100,610	36,112	34,575	37,436	31,731
Collectively evaluated for impairment				6,274,280
Individually evaluated for impairment		30,789		14,295
Loans and Leases Receivable, Net of Deferred Income		8,395,963		6,290,296
Commercial and industrial | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		2,052
Commercial and industrial | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		28,692
Commercial and industrial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		45
Commercial and industrial | Loans acquired with deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]			0
Loans acquired with deteriorated credit quality				1,721
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment				3,586
Individually evaluated for impairment				9
Total allowance for loan losses		6,981	6,278	3,595	4,304	2,114	5,423
Collectively evaluated for impairment				289,106
Individually evaluated for impairment		21		148
Loans and Leases Receivable, Net of Deferred Income		343,461		289,254
Consumer and other | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Consumer and other | Business Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		0
Consumer and other | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for impairment		21
Consumer and other | Loans acquired with deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]			0
Loans acquired with deteriorated credit quality				0
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment
Individually evaluated for impairment
Total allowance for loan losses		$ 0	$ 0	985	$ 2,507	$ 182	$ 677
Unallocated | Loans acquired with deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses
[1]	Prior to the adoption of ASC 326 on January 1, 2020, an allowance for loan losses was recorded on loans acquired with deteriorated credit quality only in the event of additional credit deterioration subsequent to acquisition.

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Nonaccrual and Past Due Greater than 90 Days (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	$ 71,390	$ 61,605
Financing Receivable, Nonaccrual, No Allowance	14,816
Financing Receivable, 90 Days or More Past Due, Still Accruing	1,313	1,615
Commercial real estate- owner occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	10,625	11,654
Financing Receivable, Nonaccrual, No Allowance	5,704
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial real estate- Non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	6,010	7,173
Financing Receivable, Nonaccrual, No Allowance	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Consumer real estate – mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	21,895	24,667
Financing Receivable, Nonaccrual, No Allowance	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	281	168
Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	3,152	2,278
Financing Receivable, Nonaccrual, No Allowance	1,152
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	28,948	15,685
Financing Receivable, Nonaccrual, No Allowance	7,960
Financing Receivable, 90 Days or More Past Due, Still Accruing	563	946
Consumer and other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	760	148
Financing Receivable, Nonaccrual, No Allowance	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	$ 469	$ 501

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Recorded Investment, Principal Balance and Related Allowance (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					$ 58,144,000
Unpaid principal balances					64,556,000
Valuation allowance	$ 10,700,000		$ 10,700,000		3,280,000
Impaired Financing Receivable, Average Recorded Investment		$ 73,649,000		$ 81,612,000
Impaired Financing Receivable, Interest Income, Cash Basis Method	0	0	0	176,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	910,000	1,300,000	2,100,000	3,500,000
Currently performing impaired loans	$ 40,700,000		$ 40,700,000		35,800,000
Impaired loans with an allowance:
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					35,758,000
Unpaid principal balances					40,305,000
Valuation allowance					3,280,000
Impaired Financing Receivable, Average Recorded Investment		44,265,000		46,633,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		0
Impaired loans with an allowance: | Commercial real estate – mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					9,998,000
Unpaid principal balances					10,983,000
Valuation allowance					1,235,000
Impaired Financing Receivable, Average Recorded Investment		13,050,000		14,689,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		0
Impaired loans with an allowance: | Consumer real estate – mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					20,996,000
Unpaid principal balances					23,105,000
Valuation allowance					1,292,000
Impaired Financing Receivable, Average Recorded Investment		19,508,000		20,887,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		0
Impaired loans with an allowance: | Construction and land development
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					542,000
Unpaid principal balances					654,000
Valuation allowance					33,000
Impaired Financing Receivable, Average Recorded Investment		451,000		587,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		0
Impaired loans with an allowance: | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					4,074,000
Unpaid principal balances					5,381,000
Valuation allowance					711,000
Impaired Financing Receivable, Average Recorded Investment		11,113,000		10,070,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		0
Impaired loans with an allowance: | Consumer and other
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					148,000
Unpaid principal balances					182,000
Valuation allowance					9,000
Impaired Financing Receivable, Average Recorded Investment		143,000		400,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		0
Impaired loans without an allowance:
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					22,386,000
Unpaid principal balances					24,251,000
Valuation allowance					0
Impaired Financing Receivable, Average Recorded Investment		29,384,000		34,979,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		176,000
Impaired loans without an allowance: | Commercial real estate – mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					8,124,000
Unpaid principal balances					8,891,000
Valuation allowance					0
Impaired Financing Receivable, Average Recorded Investment		9,344,000		12,521,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		176,000
Impaired loans without an allowance: | Consumer real estate – mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					4,022,000
Unpaid principal balances					4,021,000
Valuation allowance					0
Impaired Financing Receivable, Average Recorded Investment		7,922,000		8,381,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		0
Impaired loans without an allowance: | Construction and land development
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					19,000
Unpaid principal balances					17,000
Valuation allowance					0
Impaired Financing Receivable, Average Recorded Investment		10,000		452,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		0
Impaired loans without an allowance: | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					10,221,000
Unpaid principal balances					11,322,000
Valuation allowance					0
Impaired Financing Receivable, Average Recorded Investment		12,108,000		13,625,000
Impaired Financing Receivable, Interest Income, Cash Basis Method		0		0
Impaired loans without an allowance: | Consumer and other
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment					0
Unpaid principal balances					0
Valuation allowance					$ 0
Impaired Financing Receivable, Average Recorded Investment		0		0
Impaired Financing Receivable, Interest Income, Cash Basis Method		$ 0		$ 0

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses - Rollforward of Purchase Credit Impaired Loans (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)
Gross Carrying Value
Gross carrying value, beginning balance	$ 29,544
Reclassification of discount to allowance for credit losses	0
Year-to-date settlements	5,600
Gross carrying value, ending balance	23,944
Accretable Yield
Accretable yield, beginning balance	(4,801)
Reclassification of discount to allowance for credit losses	0
Year-to-date settlements	2,240
Accretable yield, ending balance	(2,561)
Nonaccretable Yield
Nonaccretable yield, beginning balance	(3,828)
Reclassification of discount to allowance for credit losses	3,828
Year-to-date settlements	0
Nonaccretable yield, ending balance	0
Net Carrying Value
Net carrying value, beginning balance	20,915
Reclassification of discount to allowance for credit losses	3,828
Year-to-date settlements	3,360
Net carrying value, ending balance	$ 21,383

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses - Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructurings performing as of restructure date	$ 2,600		$ 2,600		$ 4,900
Number of contracts	0	1	1	4
Pre Modification Outstanding Recorded Investment	$ 0	$ 314	$ 807	$ 2,444
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 297	$ 807	$ 1,738
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts			0	0
Commercial real estate- owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	1	0	1
Pre Modification Outstanding Recorded Investment	$ 0	$ 314	$ 0	$ 314
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 297	$ 0	$ 297
Commercial real estate- Non-owner occupied
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
Consumer real estate – mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	0	1	1
Pre Modification Outstanding Recorded Investment	$ 0	$ 0	$ 807	$ 712
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 0	$ 807	$ 626
Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	0	0	1
Pre Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 21
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 0	$ 0	$ 19
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts	0	0	0	1
Pre Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 1,397
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 0	$ 0	$ 796
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 Cred_12

Loans and Allowance for Credit Losses - Industry Classification System (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Lessors of nonresidential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	$ 3,655,366
Unfunded Commitments	916,186
Total exposure	4,571,552	$ 4,578,116
Lessors of residential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	1,158,042
Unfunded Commitments	795,259
Total exposure	1,953,301	1,599,837
New Housing For-Sale Builders
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	479,532
Unfunded Commitments	613,518
Total exposure	1,093,050	1,090,603
Hotels (except Casino Hotels) and Motels
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	910,857
Unfunded Commitments	127,623
Total exposure	$ 1,038,480	$ 967,771

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax Contingency [Line Items]
Effective income tax rate (as percent)	19.30%	19.50%	15.20%	19.60%
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 0	$ 0	$ 0	$ 0
Unrecognized Tax Benefits	6,900,000		6,900,000		$ 6,900,000
Interest and penalties	$ 0	$ 0	$ 0	$ 0
Effective income tax rate (as percent)	19.30%	19.50%	15.20%	19.60%
Federal and State income tax statutory rate (as percent)			26.14%	26.14%
Excess tax benefit	$ (85,000)	$ 131,000	$ 505,000	$ 832,000
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount			$ 22,400,000

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Off-Balance Sheet, Credit Loss, Liability	$ 21.2	$ 8.8	$ 2.4
Commitments
Loss Contingencies [Line Items]
Amount of commitment	9,200
Home Equity Line of Credit
Loss Contingencies [Line Items]
Amount of commitment	$ 1,100
Standby letter of credit
Loss Contingencies [Line Items]
Expiry period of standby letter of credit, maximum	2 years
Amount of commitment	$ 191.6

Stock Options and Restricted _3

Stock Options and Restricted Shares - Narrative (Details) - USD ($) $ in Thousands	Jul. 31, 2015	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 4,443	$ 4,148	$ 5,501	$ 5,018	$ 5,160	$ 4,913	$ 14,092	$ 15,091
Remaining Share-Based Compensation on Unvested Restricted Stock Awards		$ 40,700						$ 40,700
Weighted Average Remaining Period of Sharebased Compensation Expense								1 year 10 months 9 days
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		808,000						808,000
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)		0						0
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 - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2020		Dec. 31, 2019
Number
Outstanding, beginning balance (in shares)		119,274
Granted (in shares)		0
Exercised (in shares)		(9,787)
Forfeited (in shares)		0
Outstanding, ending balance (in shares)		109,487		119,274
Additional disclosures
Options exercisable (in shares)		109,487
Weighted-average exercise price of options outstanding (in dollars per share)		$ 23.44		$ 23.45
Weighted-average contractual remaining term for options outstanding		2 years 1 month 6 days		2 years 10 months 6 days
Aggregate intrinsic value		$ 1,331	[1]	$ 4,837	[2]
Weighted- average exercise price of options exercisable (in dollars per share)		$ 23.44
Weighted-average contractual remaining term for options exercisable		2 years 1 month 6 days
Aggregate intrinsic value of options exercisable	[1]	$ 1,331
Quoted closing price of common stock (in dollars per share)		$ 35.59		$ 64
Number of awards used in aggregate intrinsic value (in shares)		109,487		119,274
[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 $35.59 per common share at September 30, 2020 for the 109,487 options that were in-the-money at September 30, 2020.
[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 $64.00 per common share at December 31, 2019 for the 119,274 options that were in-the-money at December 31, 2019.

Stock Options and Restricted _5

Stock Options and Restricted Shares - Unvested Restricted Awards (Details) - Restricted stock	9 Months Ended
	Sep. 30, 2020$ / sharesshares
Number
Unvested, beginning of period (in shares)	555,296
Shares awarded (in shares)	265,049
Restrictions lapsed and shares released to associates/directors (in shares)	(198,599)
Shares forfeited (in shares)	(22,293)	[1]
Unvested, end of period (in shares)	599,453
Grant Date Weighted-Average Cost
Unvested, beginning of period (in dollars per share) | $ / shares	$ 57.04
Unvested, end of period (in dollars per share) | $ / shares	$ 57.60
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, 2020shares
Time Based Awards | Associates
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded	246,524	[1],[2]
Restrictions Lapsed and shares released to participants	116	[1],[2]
Shares Forfeited by participants	5,076	[1],[2],[3]
Shares Unvested	241,332	[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	18,525	[1],[4]
Restrictions Lapsed and shares released to participants	0	[1],[4]
Shares Forfeited by participants	0	[1],[3],[4]
Shares Unvested	18,525	[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, 2020. 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 28, 2021 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, 2020shares
2020 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)	3 years
2020 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)	2 years
2020 Restricted granted shares | Tranche 2022
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
2020 Restricted granted shares | Named Executive Officers (NEOs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	136,137	[1]
2020 Restricted granted shares | Named Executive Officers (NEOs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	204,220	[1]
2020 Restricted granted shares | Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	59,648
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 | Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	129,723
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	43,996
[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) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivative [Line Items]
Notional Amount					$ 1,300,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	$ 3,070,594		$ 3,070,594		2,592,778
Estimated Fair Value	(1,480)		(1,480)		(208)
Derivative, Gain (Loss) on Derivative, Net	$ (135)	$ (44)	$ (1,272)	$ (146)
Not Designated as Hedging Instrument | Assets
Derivative [Line Items]
Description of Location of Interest Rate Derivatives on Balance Sheet	Other assets		Other assets
Notional Amount	$ 1,535,297		$ 1,535,297		1,296,389
Estimated Fair Value	$ 115,078		$ 115,078		43,507
Not Designated as Hedging Instrument | Liabilities
Derivative [Line Items]
Description of Location of Interest Rate Derivatives on Balance Sheet	Other liabilities		Other liabilities
Notional Amount	$ 1,535,297		$ 1,535,297		1,296,389
Estimated Fair Value	$ (116,558)		$ (116,558)		$ (43,715)

Derivative Instruments - Hedge

Derivative Instruments - Hedge Derivatives (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)		$ 16,500,000
Net loss on cash flow hedges reclassified from other comprehensive income into net income, net of tax	$ 156,000		$ 1,129,000	$ 1,858,000	$ 946,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months				8,000,000
Notional Amount						$ 1,300,000,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	3,070,594,000			3,070,594,000		2,592,778,000
Hedging derivative | Cash flow hedge
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)	$ (3,026,000)		1,882,000	$ 67,202,000	8,303,000
Hedging derivative | Fair value hedge | Securities
Derivative [Line Items]
Weighted Average Remaining Maturity				7 years 1 month 13 days
Pay Rate (as percent)	2.26%			2.26%
Derivative, Type of Interest Rate Paid on Swap				3 month LIBOR/Fed Funds
Forecasted Notional Amount	$ 708,931,000			$ 708,931,000		477,905,000
Fair Value Hedge Assets	(77,214,000)			(77,214,000)		(40,778,000)
Derivative Instruments and Hedges, Assets	853,350,000			$ 853,350,000		551,789,000
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	(4,996,000)		10,888,000	$ 36,436,000	37,131,000
Gain (Loss) on Fair Value Hedges Recognized in Earnings	4,996,000		(10,888,000)	(36,436,000)	(37,131,000)
Fair Value Hedging Adjustment	77,214,000			77,214,000		40,778,000
Hedging derivative | Fair value hedge | Securities | LIBOR
Derivative [Line Items]
Forecasted Notional Amount	477,500,000			477,500,000
Hedging derivative | Fair value hedge | Securities | Federal Funds Rate
Derivative [Line Items]
Forecasted Notional Amount	231,400,000			231,400,000
Hedging derivative | Fair value hedge | Loans
Derivative [Line Items]
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	0		0	0	6,915,000
Gain (Loss) on Fair Value Hedges Recognized in Earnings	0		0	0	(6,915,000)
Amortization expense, reduction to interest income on loans	1,200,000			3,300,000
Pay fixed and receive variable swaps | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	1,535,297,000			1,535,297,000		1,296,389,000
Pay variable and receive fixed swaps | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	1,535,297,000			1,535,297,000		1,296,389,000
Asset derivatives | Hedging derivative | Cash flow hedge
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)	$ (3,506,000)		1,951,000	$ 68,161,000	9,875,000
Description of Location of Interest Rate Cash Flow Hedge Derivative on Balance Sheet				Other assets
Weighted Average Remaining Maturity				4 years 2 months 8 days
Pay Rate (as percent)	0.00%			0.00%
Receive Rate				2.25% minus 1 month LIBOR
Forecasted Notional Amount	$ 1,500,000,000			$ 1,500,000,000		2,800,000,000
Cash Flow Hedges Derivative Instruments at Fair Value, Net	134,853,000			134,853,000		87,422,000
Liability derivatives | Hedging derivative | Cash flow hedge
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)	$ 480,000		$ (69,000)	$ (959,000)	$ (1,572,000)
Description of Location of Interest Rate Cash Flow Hedge Derivative on Balance Sheet				Other liabilities
Weighted Average Remaining Maturity				1 year 7 months 2 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	$ (4,610,000)			$ (4,610,000)		$ (3,312,000)

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Valuation allowance		$ 10,700	$ 3,280
Recurring
Assets, Fair Value Disclosure [Abstract]
U.S. Treasury securities		84,464	72,867
U.S. government agency securities		76,859	79,692
Mortgage-backed securities		1,701,212	1,463,907
State and municipal securities		1,327,721	1,714,453
Agency-backed securities		168,839	152,972
Corporate notes and other		104,327	56,104
Total investment securities available-for-sale		3,463,422	3,539,995
Other Investments		66,872	63,291
Other assets		265,835	134,040
Total assets at fair value		3,796,129	3,737,326
Liabilities at fair value: [Abstract]
Other liabilities		198,724	87,613
Total liabilities at fair value		198,724	87,613
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		84,464	72,867
U.S. government agency securities		76,859	79,692
Mortgage-backed securities		1,701,212	1,463,907
State and municipal securities		1,312,248	1,698,550
Agency-backed securities		168,839	152,972
Corporate notes and other		104,327	56,104
Total investment securities available-for-sale		3,447,949	3,524,092
Other Investments		25,666	25,135
Other assets		265,835	134,040
Total assets at fair value		3,739,450	3,683,267
Liabilities at fair value: [Abstract]
Other liabilities		198,724	87,613
Total liabilities at fair value		198,724	87,613
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		15,473	15,903
Agency-backed securities		0	0
Corporate notes and other		0	0
Total investment securities available-for-sale		15,473	15,903
Other Investments		41,206	38,156
Other assets		0	0
Total assets at fair value		56,679	54,059
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		97,243	61,965
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Other real estate owned		19,445	29,487
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	77,798	32,478
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]
Other real estate owned		0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	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]
Other real estate owned		0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	0	0
Nonrecurring | Models with significant unobservable market parameters (Level 3)
Assets, Fair Value Disclosure [Abstract]
Total assets at fair value		97,243	61,965
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Other real estate owned		19,445	29,487
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[1]	$ 77,798	$ 32,478
[1]	The carrying value of collateral dependent loans at September 30, 2020 is net of a valuation allowance of $10.7 million, and the carrying value of impaired loans at December 31, 2019 is net of a valuation allowance of $3.3 million

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward]
Transfers out of Level 3			$ 0
Recurring | Other investments
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward]
Fair value, beginning of period	$ 40,612	$ 31,522	38,156	$ 26,422
Total realized gains included in income	456	1,264	4	2,193
Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at period-end	0	0	0	0
Purchases	1,095	1,777	4,822	6,965
Issuances	0	0	0	0
Settlements	(957)	(615)	(1,776)	(1,632)
Transfers out of Level 3	0	0	0	0
Fair value, end of period	41,206	33,948	41,206	33,948
Total realized gains (losses) included in income related to financial assets and liabilities still on the consolidated balance sheet at period-end	456	1,264	4	2,193
Recurring | Available-for-sale Securities
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward]
Fair value, beginning of period	15,295	15,263	15,903	14,595
Total realized gains included in income	27	29	82	87
Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at period-end	151	574	631	1,583
Purchases	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	(1,143)	(399)
Transfers out of Level 3	0	0	0	0
Fair value, end of period	15,473	15,866	15,473	15,866
Total realized gains (losses) included in income related to financial assets and liabilities still on the consolidated balance sheet at period-end	$ 27	$ 29	$ 82	$ 87

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, 2020		Dec. 31, 2019
Financial assets:
Securities held-to-maturity		$ 1,060,847		$ 201,217
Off-balance sheet instruments:
Commitments to extend credit	[1]	21,200		2,400
Standby letters of credit		1,600	[1]	1,400
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
Models with significant observable market parameters (Level 2)
Financial assets:
Securities held-to-maturity		1,060,847		201,217
Loans, net		0		0
Consumer loans held-for-sale		84,877		82,986
Commercial loans held-for-sale		12,606		17,836
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
Models with significant unobservable market parameters (Level 3)
Financial assets:
Securities held-to-maturity		0		0
Loans, net		22,483,708		19,717,845
Consumer loans held-for-sale		0		0
Commercial loans held-for-sale		0		0
Financial liabilities:
Deposits and securities sold under agreements to repurchase		25,804,207		19,647,392
Federal Home Loan Bank advances		1,428,059		2,078,514
Subordinated debt and other borrowings		681,964		712,220
Off-balance sheet instruments:
Commitments to extend credit	[1]	22,784		3,786
Carrying/ Notional Amount
Financial assets:
Securities held-to-maturity		1,039,650		188,996
Loans, net		22,188,764		19,693,099
Consumer loans held-for-sale		82,748		81,820
Commercial loans held-for-sale		12,290		17,585
Financial liabilities:
Deposits and securities sold under agreements to repurchase		26,671,015		20,307,382
Federal Home Loan Bank advances		1,287,738		2,062,534
Subordinated debt and other borrowings		670,273		749,080
Off-balance sheet instruments:
Commitments to extend credit	[1]	9,374,780		8,141,920
Estimated Fair Value
Financial assets:
Securities held-to-maturity	[2]	1,060,847		201,217
Loans, net	[2]	22,483,708		19,717,845
Consumer loans held-for-sale	[2]	84,877		82,986
Commercial loans held-for-sale	[2]	12,606		17,836
Financial liabilities:
Deposits and securities sold under agreements to repurchase	[2]	25,804,207		19,647,392
Federal Home Loan Bank advances	[2]	1,428,059		2,078,514
Subordinated debt and other borrowings	[2]	681,964		712,220
Off-balance sheet instruments:
Commitments to extend credit	[1],[2]	$ 22,784		$ 3,786
[1]	At the end of each quarter, Pinnacle Financial evaluates the inherent risks of the outstanding off-balance sheet commitments, including both commitments for unfunded loans and standby letters of credit. In making this evaluation, Pinnacle Financial utilizes credit loss expectations on funded loans from our allowance for credit losses methodology and evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at September 30, 2020 and December 31, 2019, Pinnacle Financial included in other liabilities $21.2 million and $2.4 million, respectively, representing expected credit losses on off-balance sheet commitments, which are reflected in the estimated fair values of the related commitments. Also included in the fair values at September 30, 2020 and December 31, 2019 are unamortized fees related to these commitments of $1.6 million and $1.4 million, respectively.
[2]	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) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended	9 Months Ended
		Jun. 30, 2020shares	Sep. 30, 2020USD ($)$ / shares	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
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			$ 1,312,929		$ 1,184,183
Quarterly common stock dividend (in dollar per share) | $ / shares			$ 0.16
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations
Issuance of preferred stock, net of issuance costs			$ 217,126	$ 0
Depositary Shares | shares		9,000
Pinnacle Financial
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid to Pinnacle Financial by Pinnacle Bank			119,100
Actual
Total capital to risk weighted assets			3,578,436		3,159,375
Tier I capital to risk weighted assets			2,702,540		2,319,234
Common Equity Tier I capital to risk weighted assets			2,485,291		2,319,112
Tier I capital to average assets	[1]		$ 2,702,540		$ 2,319,234
Actual
Total capital to risk weighted assets (as percent)			0.142		0.132
Tier I capital to risk weighted assets (as percent)			0.107		0.097
Common Equity Tier I capital to risk weighted assets (as percent)			0.099		0.097
Tier I capital to average assets (as percent)	[1]		0.085		0.091
Minimum Capital Requirement
Total capital to risk weighted assets			$ 2,015,196		$ 1,912,885
Tier I capital to risk weighted assets			1,511,397		1,434,664
Common Equity Tier I capital			1,133,547		1,075,998
Tier I capital to average assets	[1]		$ 1,273,124		$ 1,021,836
Minimum Capital Requirement
Total capital to risk weighted assets (as percent)			0.080		0.080
Tier I capital to risk weighted assets (as percent)			0.060		0.060
Common Equity Tier I capital to risk weighted assets (as percent)			0.045		0.045
Tier I capital to average assets (as percent)	[1]		0.040		0.040
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations
Total capital to risk weighted assets			$ 2,518,994		$ 2,391,106
Tier I capital to risk weighted assets			$ 2,015,196		$ 1,912,885
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations
Total capital to risk weighted assets (as percent)			0.100		0.100
Tier I capital to risk weighted assets (as percent)			0.080		0.080
Pinnacle Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Retained earnings			$ 675,700
Actual
Total capital to risk weighted assets			3,146,468		$ 2,906,853
Tier I capital to risk weighted assets			2,819,572		2,679,713
Common Equity Tier I capital to risk weighted assets			2,819,450		2,679,590
Tier I capital to average assets	[1]		$ 2,819,572		$ 2,679,713
Actual
Total capital to risk weighted assets (as percent)			0.126		0.122
Tier I capital to risk weighted assets (as percent)			0.113		0.112
Common Equity Tier I capital to risk weighted assets (as percent)			0.113		0.112
Tier I capital to average assets (as percent)	[1]		0.089		0.105
Minimum Capital Requirement
Total capital to risk weighted assets			$ 2,005,334		$ 1,906,839
Tier I capital to risk weighted assets			1,504,000		1,430,129
Common Equity Tier I capital			1,128,000		1,072,597
Tier I capital to average assets	[1]		$ 1,269,171		$ 1,019,210
Minimum Capital Requirement
Total capital to risk weighted assets (as percent)			0.080		0.080
Tier I capital to risk weighted assets (as percent)			0.060		0.060
Common Equity Tier I capital to risk weighted assets (as percent)			0.045		0.045
Tier I capital to average assets (as percent)	[1]		0.040		0.040
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations
Total capital to risk weighted assets			$ 2,506,667		$ 2,383,549
Tier I capital to risk weighted assets			2,005,334		1,906,839
Common Equity Tier I capital to risk weighted assets			1,629,333		1,549,307
Tier I capital to average assets	[1]		$ 1,586,464		$ 1,274,012
Minimum To Be Well-Capitalized Under Prompt Corrective Action Regulations
Total capital to risk weighted assets (as percent)			0.100		0.100
Tier I capital to risk weighted assets (as percent)			0.080		0.080
Common Equity Tier I capital to risk weighted assets (as percent)			0.065		0.065
Tier I capital to average assets (as percent)	[1]		0.050		0.050
[1]	(*) Average assets for the above calculations were based on the most recent quarter.

Other borrowings (Details)

Other borrowings (Details) $ in Thousands		3 Months Ended		9 Months Ended	12 Months Ended
		Mar. 31, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)subsidiary	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Number of wholly owned subsidiaries | subsidiary				12
Term				30 years
Loans and Leases Receivable, Net of Deferred Income				$ 22,477,409	$ 19,787,876
Total Debt Outstanding				670,273	749,080
Debt issuance costs and fair value adjustments				(12,722)
Proceeds from Issuance of Debt					$ 296,500
Paycheck Protection Program [Member]
Debt Instrument [Line Items]
Loans and Leases Receivable, Net of Deferred Income				2,300,000
Paycheck Protection Program Liquidity Facility
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity				$ 2,300,000
Pinnacle Statutory Trust I
Debt Instrument [Line Items]
Date Established				Dec. 29, 2003
Maturity				Dec. 30, 2033
Total Debt Outstanding				$ 10,310
Interest Rate (as percent)				3.05%
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
Interest Rate (as percent)				1.62%
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
Interest Rate (as percent)				1.87%
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
Interest Rate (as percent)				3.10%
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
Interest Rate (as percent)				3.53%
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
Interest Rate (as percent)				3.13%
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
Interest Rate (as percent)				2.68%
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
Interest Rate (as percent)				1.92%
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
Interest Rate (as percent)				3.33%
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
Interest Rate (as percent)				1.74%
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
Interest Rate (as percent)				2.00%
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
Interest Rate (as percent)				1.72%
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				$ 60,000
Interest Rate (as percent)				3.38%
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				$ 70,000
Interest Rate (as percent)				3.38%
Coupon Structure				three month LIBOR + 3.128%
Pinnacle Financial Subordinated Notes
Debt Instrument [Line Items]
Date Established				Nov. 16, 2016
Maturity				Nov. 16, 2026
Total Debt Outstanding	[1]			$ 120,000
Interest Rate (as percent)	[1]			5.25%
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	[2]			$ 300,000
Interest Rate (as percent)	[2]			4.13%
Coupon Structure				three month LIBOR + 2.775%
Subordinated Debt Due 2023
Debt Instrument [Line Items]
Repayments of Subordinated Debt			$ 8,800
BNC Subordinated Notes
Debt Instrument [Line Items]
Repayments of Subordinated Debt		$ 60,000
Avenue Subordinated Notes
Debt Instrument [Line Items]
Repayments of Subordinated Debt		$ 20,000
[1]	Migrates to three month LIBOR + 3.884% beginning November 16, 2021 through the end of the term.
[2]	Migrates to three month LIBOR + 2.775% beginning September 15, 2024 through the end of the term.