Pinnacle Financial Partners (PNFP) 10-Q2 Nov 182018 Q3 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2018	Oct. 31, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	PINNACLE FINANCIAL PARTNERS INC
Entity Central Index Key	1,115,055
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		77,888,834

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Assets [Abstract]
Cash and noninterest-bearing due from banks	$ 145,638,000	$ 176,553,000
Interest-bearing due from banks	394,129,000	496,911,000
Federal funds sold and other	11,313,000	106,132,000
Cash and cash equivalents	551,080,000	779,596,000
Securities available-for-sale, at fair value	3,004,582,000	2,515,283,000
Securities held-to-maturity (fair value of $192.5 million and $20.8 million at Sept. 30, 2018 and Dec. 31, 2017, respectively)	194,997,000	20,762,000
Consumer loans held-for-sale	47,417,000	103,729,000
Commercial loans held-for-sale	11,402,000	25,456,000
Loans	17,464,009,000	15,633,116,000
Less allowance for loan losses	(79,985,000)	(67,240,000)
Loans, net	17,384,024,000	15,565,876,000
Premises and equipment, net	268,387,000	266,014,000
Equity method investment	221,302,000	221,667,000
Accrued interest receivable	73,366,000	57,440,000
Goodwill	1,807,121,000	1,808,002,000
Core deposits and other intangible assets	48,737,000	56,710,000
Other real estate owned	17,467,000	27,831,000
Other assets	927,663,000	757,334,000
Total assets	24,557,545,000	22,205,700,000
Deposits:
Noninterest-bearing	4,476,925,000	4,381,386,000
Interest-bearing	3,195,657,000	2,987,291,000
Savings and money market accounts	7,262,968,000	6,548,964,000
Time	3,471,965,000	2,534,061,000
Total deposits	18,407,515,000	16,451,702,000
Securities sold under agreements to repurchase	130,217,000	135,262,000
Federal Home Loan Bank advances	1,520,603,000	1,319,909,000
Subordinated debt and other borrowings	465,487,000	465,505,000
Accrued interest payable	20,944,000	10,480,000
Other liabilities	115,738,000	114,890,000
Total liabilities	20,660,504,000	18,497,748,000
Stockholders' equity:
Preferred stock, no par value; 10.0 million shares authorized; no shares issued and outstanding	0	0
Common stock, par value $1.00; 180.0 million shares authorized at Sept. 30, 2018 and 90.0 million shares authorized at Dec. 31, 2017; 77.9 million and 77.7 million shares issued and outstanding at Sept. 30, 2018 and Dec. 31, 2017, respectively	77,867,000	77,740,000
Additional paid-in capital	3,123,323,000	3,115,304,000
Retained earnings	750,363,000	519,144,000
Accumulated other comprehensive loss, net of taxes	(54,512,000)	(4,236,000)
Total stockholders' equity	3,897,041,000	3,707,952,000
Total liabilities and stockholders' equity	$ 24,557,545,000	$ 22,205,700,000

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Securities held-to-maturity, fair value	$ 192,500,000	$ 20,830,000
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	180,000,000	90,000,000
Common stock, shares issued (in shares)	77,867,000	77,740,000
Common stock, shares outstanding (in shares)	77,867,000	77,740,000

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($)	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Loans, including fees	$ 221,901,000	$ 183,570,000	$ 621,873,000	$ 389,093,000
Securities:
Taxable	12,209,000	12,067,000	35,179,000	26,765,000
Tax-exempt	10,074,000	4,620,000	25,709,000	8,533,000
Federal funds sold and other	3,926,000	1,639,000	7,861,000	3,376,000
Total interest income	248,110,000	201,896,000	690,622,000	427,767,000
Interest expense:
Deposits	44,172,000	19,104,000	100,920,000	38,216,000
Securities sold under agreements to repurchase	165,000	148,000	438,000	277,000
Federal Home Loan Bank advances and other borrowings	14,353,000	9,734,000	43,137,000	20,984,000
Total interest expense	58,690,000	28,986,000	144,495,000	59,477,000
Net interest income	189,420,000	172,910,000	546,127,000	368,290,000
Provision for loan losses	8,725,000	6,920,000	25,058,000	17,384,000
Net interest income after provision for loan losses	180,695,000	165,990,000	521,069,000	350,906,000
Noninterest income:
Total noninterest income	51,478,000	43,248,000	143,600,000	108,701,000
Noninterest expense:
Salaries and employee benefits	69,117,000	64,288,000	196,948,000	146,316,000
Equipment and occupancy	19,252,000	16,590,000	55,203,000	36,978,000
Other real estate expense	67,000	513,000	92,000	827,000
Marketing and other business development	3,293,000	2,222,000	8,084,000	6,228,000
Postage and supplies	1,654,000	1,755,000	5,984,000	4,074,000
Amortization of intangibles	2,616,000	3,077,000	7,973,000	5,745,000
Merger related expense	0	8,847,000	8,259,000	12,740,000
Other noninterest expense	17,991,000	12,444,000	50,935,000	30,679,000
Total noninterest expense	113,990,000	109,736,000	333,478,000	243,587,000
Income before income taxes	118,183,000	99,502,000	331,191,000	216,020,000
Income tax expense	24,436,000	35,060,000	67,069,000	68,839,000
Net income	$ 93,747,000	$ 64,442,000	$ 264,122,000	$ 147,181,000
Per share information:
Basic net income per common share (in dollars per share)	$ 1.22	$ 0.84	$ 3.42	$ 2.48
Diluted net income per common share (in dollars per share)	$ 1.21	$ 0.83	$ 3.41	$ 2.46
Weighted average shares outstanding:
Basic (in shares)	77,145,023	76,678,584	77,116,377	59,371,202
Diluted (in shares)	77,490,977	77,232,098	77,442,554	59,910,344
Service charges on deposit accounts
Noninterest income:
Total noninterest income	$ 6,404,000	$ 5,921,000	$ 18,289,000	$ 13,955,000
Investment services
Noninterest income:
Total noninterest income	5,237,000	3,660,000	15,250,000	9,592,000
Insurance sales commissions
Noninterest income:
Total noninterest income	2,126,000	2,123,000	7,293,000	5,444,000
Gain on mortgage loans sold, net
Noninterest income:
Total noninterest income	3,902,000	5,963,000	11,423,000	14,785,000
Gain on sale of investment securities, net
Noninterest income:
Total noninterest income	11,000	0	41,000	0
Trust fees
Noninterest income:
Total noninterest income	3,087,000	2,636,000	9,768,000	6,019,000
Income from equity method investment
Noninterest income:
Total noninterest income	14,236,000	8,937,000	33,286,000	25,514,000
Other noninterest income
Noninterest income:
Total noninterest income	$ 16,475,000	$ 14,008,000	$ 48,250,000	$ 33,392,000

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 93,747,000	$ 64,442,000	$ 264,122,000	$ 147,181,000
Other comprehensive income (loss), net of tax:
Change in fair value on available-for-sale securities, net of tax	(16,899,000)	(967,000)	(53,167,000)	133,000
Change in fair value of cash flow hedges, net of tax	783,000	239,000	3,453,000	1,307,000
Other Comprehensive Income(Loss), Transfers from Available-for-sale to Held-to-maturity securities, net of tax	(10,000)	(47,000)	(103,000)	(160,000)
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	(145,000)	(139,000)	(429,000)	(204,000)
Net gain on sale of investment securities reclassified from other comprehensive income into net income, net of tax	(8,000)	0	(30,000)	0
Total other comprehensive income (loss), net of tax	(16,279,000)	(914,000)	(50,276,000)	1,076,000
Total comprehensive income	$ 77,468,000	$ 63,528,000	$ 213,846,000	$ 148,257,000

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comp. Income (Loss), net	BNC BancorpCommon Stock	BNC BancorpAdditional Paid-in Capital
Balance at Dec. 31, 2016	$ 1,496,695,000	$ 46,359,000	$ 1,083,491,000	$ 381,072,000	$ (14,227,000)
Balance (in shares) at Dec. 31, 2016		46,359,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options and related tax benefits	3,821,000	$ 194,000	3,627,000
Exercise of employee common stock options and related tax benefits (in shares)		194,000
Common dividends paid	(24,983,000)			(24,983,000)
Issuance of restricted common shares, net of forfeitures	0	$ 264,000	(264,000)
Issuance of restricted common shares, net of forfeitures (in shares)		264,000
Issuance of common equity, net of costs	192,194,000	$ 3,220,000	188,974,000
Stock Issued During Period, Value, Acquisitions	1,847,833,000					$ (27,687,000)	$ (1,820,146,000)
Issuance of common equity, net of costs (in shares)		3,220,000
Common stock issued in conjunction with acquisition (in shares)						27,687,000
Restricted shares withheld for taxes and related tax benefit	(4,880,000)	$ (72,000)	(4,808,000)
Stock-based compensation expense	14,412,000		14,412,000
Restricted shares withheld for taxes (in shares)		(72,000)
Net income	147,181,000			147,181,000
Other comprehensive income (loss)	1,076,000				1,076,000
Balance at Sep. 30, 2017	3,673,349,000	$ 77,652,000	3,105,578,000	503,270,000	(13,151,000)
Balance (in shares) at Sep. 30, 2017		77,652,000
Balance at Dec. 31, 2017	3,707,952,000	$ 77,740,000	3,115,304,000	519,144,000	(4,236,000)
Balance (in shares) at Dec. 31, 2017		77,740,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options and related tax benefits	1,700,000	$ 90,000	1,610,000
Exercise of employee common stock options and related tax benefits (in shares)		90,000
Common dividends paid	(32,903,000)			(32,903,000)
Issuance of restricted common shares, net of forfeitures	0	$ 141,000	(141,000)
Issuance of restricted common shares, net of forfeitures (in shares)		141,000
Restricted shares withheld for taxes and related tax benefit	(6,808,000)	$ (104,000)	(6,704,000)
Stock-based compensation expense	13,254,000		13,254,000
Restricted shares withheld for taxes (in shares)		(104,000)
Net income	264,122,000			264,122,000
Other comprehensive income (loss)	(50,276,000)				(50,276,000)
Balance at Sep. 30, 2018	$ 3,897,041,000	$ 77,867,000	$ 3,123,323,000	$ 750,363,000	$ (54,512,000)
Balance (in shares) at Sep. 30, 2018		77,867,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	9 Months Ended
CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	Sep. 30, 2018	Sep. 30, 2017
Operating activities:
Net income	$ 264,122,000	$ 147,181,000
Adjustments to reconcile net income to net cash provided by operating activities:
Net amortization/accretion of premium/discount on securities	14,366,000	8,388,000
Depreciation, amortization and accretion	(20,959,000)	(14,848,000)
Provision for loan losses	25,058,000	17,384,000
Gain on mortgage loans sold, net	(11,423,000)	(14,785,000)
Gain (Loss) on Sale of Investments	41,000	0
Stock-based compensation expense	13,254,000	14,412,000
Deferred tax expense	17,339,000	15,646,000
Losses (gains) on dispositions of other real estate and other investments	(259,000)	74,000
Income from equity method investment	(33,286,000)	(25,514,000)
Dividends received from equity method investment	33,651,000	19,372,000
Excess tax benefit from stock compensation	(2,953,000)	(4,608,000)
Gain on commercial loans sold, net	(1,985,000)	(791,000)
Commercial loans held for sale:
Loans originated	(226,551,000)	(116,013,000)
Loans sold	242,590,000	119,007,000
Consumer loans held for sale:
Loans originated	(941,991,000)	(772,239,000)
Loans sold	964,747,000
Proceeds from Sale of Mortgage Loans Held-for-sale	917,900,000	756,729,000
Decrease (increase) in other assets	(31,805,000)	793,000
Increase (decrease) in other liabilities	14,626,000	(30,057,000)
Net cash provided by operating activities	318,500,000	120,131,000
Activities in securities available-for-sale:
Purchases	(1,023,876,000)	(1,158,038,000)
Sales	22,702,000	7,492,000
Maturities, prepayments and calls	243,678,000	207,209,000
Activities in securities held-to-maturity:
Maturities, prepayments and calls	5,280,000	4,115,000
Increase in loans, net	(1,757,157,000)	(1,194,966,000)
Purchases of software, premises and equipment	(18,478,000)	(36,045,000)
Proceeds from sales of software, premises and equipment	458,000	23,000
Proceeds from Sale of Other Real Estate	13,204,000	6,931,000
Acquisitions, net of cash acquired	0	155,142,000
Purchase of bank owned life insurance policies	(100,000,000)	(55,000,000)
Increase in other investments	(47,687,000)	(22,508,000)
Net cash used in investing activities	(2,661,876,000)	(2,085,645,000)
Financing activities:
Net increase in deposits	1,957,566,000	825,060,000
Net decrease in securities sold under agreements to repurchase	(5,045,000)	(18,460,000)
Advances from Federal Home Loan Bank:
Issuances	1,439,906,000	1,934,750,000
Payments/maturities	(1,239,198,000)	(717,048,000)
Decrease in other borrowings, net	(240,000)	(190,000)
Principal payments of capital lease obligation	(118,000)	(111,000)
Proceeds from common stock issuance, net	0	192,194,000
Exercise of common stock options and stock appreciation rights, net of repurchase of restricted shares	(5,107,000)	(1,060,000)
Common stock dividends paid	(32,904,000)	(24,984,000)
Net cash provided by financing activities	2,114,860,000	2,190,151,000
Net increase (decrease) in cash and cash equivalents	(228,516,000)	224,637,000
Cash and cash equivalents, beginning of period	779,596,000	183,645,000
Cash and cash equivalents, end of period	$ 551,080,000	$ 408,282,000

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
Summary of Significant Accounting Policies	Sep. 30, 2018
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 bank holding company whose primary business is conducted by its wholly-owned subsidiary, Pinnacle Bank. Pinnacle Bank is a commercial bank headquartered in Nashville, Tennessee. Pinnacle Financial completed its acquisitions of CapitalMark Bank & Trust (CapitalMark), Magna Bank (Magna), Avenue Financial Holdings, Inc. (Avenue) and BNC Bancorp (BNC) on July 31, 2015, September 1, 2015, July 1, 2016 and June 16, 2017, respectively. Pinnacle Financial and Pinnacle Bank also collectively hold a 49% interest in Bankers Healthcare Group, LLC (BHG), a full-service 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 11 primarily urban markets within Tennessee, the Carolinas and Virginia. 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, 2017 (2017 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 12. Subordinated Debt and Other Borrowings are included in these consolidated financial statements pursuant to the equity method of accounting. Significant intercompany transactions and accounts are eliminated in consolidation. Use of Estimates — The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term include the determination of the allowance for loan losses, determination of any impairment of intangible assets and the valuation of deferred tax assets. There have been no significant changes to Pinnacle Financial's significant accounting policies as disclosed in the 2017 10-K. Goodwill — ASC 350-35-3 provides an entity the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If an entity determines that this is the case, it is required to perform the quantitative two-step goodwill impairment test to identify potential goodwill impairment and measure the amount of goodwill impairment loss to be recognized. Based on the qualitative assessment, if an entity determines that the fair value of a reporting unit is more than its carrying amount, the quantitative two-step goodwill impairment test is not required. Pinnacle Financial performed its annual qualitative assessment as of September 30, 2018. As a result of this assessment, Pinnacle Financial believes that it is not more likely than not that the fair value of our entity is less than book value, and accordingly, the assessment indicates there is no impairment of goodwill as of September 30, 2018. As such, the additional two-step quantitative assessment was not required. Cash Flow Information — Supplemental cash flow information addressing certain cash and noncash transactions for each of the nine months ended September 30, 2018 and September 30, 2017 was as follows (in thousands): For the nine months ended 2018 2017 Cash Transactions: Interest paid $ 136,154 $ 56,804 Income taxes paid, net 55,525 53,199 Noncash Transactions: Loans charged-off to the allowance for loan losses 22,316 16,308 Loans foreclosed upon and transferred to other real estate owned 2,066 3,573 Loans foreclosed upon and transferred to other assets 1,580 641 Other real estate sales financed 276 — Available-for-sale securities transferred to held-to-maturity portfolio 179,763 — Held-for-sale loans transferred to held-for-investment loan portfolio 44,980 — Common stock issued in connection with acquisition (1) — 1,858,133 (1) See Note 2 to these consolidated financial statement for more detailed information. Income Per Common Share — Basic net income per common share (EPS) is computed by dividing net income by the weighted average common shares outstanding for the period. Diluted EPS reflects the dilution that could occur if securities or other contracts to issue common stock were exercised or converted. The difference between basic and diluted weighted average shares outstanding is attributable to common stock options, common stock appreciation rights, restricted share awards, and restricted share unit awards. The dilutive effect of outstanding options, common stock appreciation rights, restricted share awards, and restricted share unit awards is reflected in diluted EPS by application of the treasury stock method. The following is a summary of the basic and diluted net income per share calculations for the three and nine months ended September 30, 2018 and 2017 (in thousands, except per share data): Three months ended Nine months ended 2018 2017 2018 2017 Basic net income per share calculation: Numerator - Net income $ 93,747 $ 64,442 $ 264,122 $ 147,181 Denominator - Weighted average common shares outstanding 77,145 76,679 77,116 59,371 Basic net income per common share $ 1.22 $ 0.84 $ 3.42 $ 2.48 Diluted net income per share calculation: Numerator – Net income $ 93,747 $ 64,442 $ 264,122 $ 147,181 Denominator - Weighted average common shares outstanding 77,145 76,679 77,116 59,371 Dilutive shares contingently issuable 346 554 326 539 Weighted average diluted common shares outstanding 77,491 77,232 77,443 59,910 Diluted net income per common share $ 1.21 $ 0.83 $ 3.41 $ 2.46 On January 27, 2017, Pinnacle Financial completed the issuance and sale of 3,220,000 shares of common stock (including 420,000 shares issued as a result of the underwriter exercising its over-allotment option) in an underwritten public offering, which shares are included in the share count above. The net proceeds of the offering, after deducting the underwriting discount and offering expenses, were approximately $192.2 million . Also, Pinnacle Financial issued 27,687,100 shares of common stock in conjunction with the acquisition of BNC on June 16, 2017. Recently Adopted Accounting Pronouncements — In August 2017, the FASB issued Accounting Standards Update No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities . The amendments in this ASU make more financial and non-financial hedging strategies eligible for hedge accounting. It also amends the presentation and disclosure requirements and changes how companies assess effectiveness. The amendments will be effective for public companies for interim and annual periods beginning after December 15, 2018. Early adoption is permitted. Pinnacle Financial early adopted this standard in the first quarter of 2018 and subsequently entered into three hedging transactions during the nine months ended September 30, 2018, all of which are eligible for hedge accounting as a result of the new standard, as noted in Note 9. Derivative Instruments . In March 2017, the FASB issued Accounting Standards Update No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities . The amendment in this ASU shortens the amortization period for certain callable debt securities held at a premium to the earliest call date. The amendment does not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendment is effective for fiscal years beginning after December 15, 2018, including interim periods within those periods. Early adoption is permitted with modified retrospective application. Pinnacle Financial elected to early adopt this standard in the first quarter of 2018 and it continues to have no material impact to its consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . The amendment in this ASU clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendment is effective for fiscal years beginning after December 15, 2017, including interim periods within those periods. There has been no material impact on Pinnacle Financial's consolidated financial statements due to the adoption of this standard in the first quarter of 2018. In August 2016, the FASB issued Accounting Standards Update 2016-15, Statement of Cash Flows (Topic 230) intended to reduce the diversity in practice around how certain transactions are classified within the statement of cash flows. The guidance became effective for public companies for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Pinnacle Financial adopted this standard in the first quarter of 2018 and it continues to have no material impact to its consolidated financial statements, with the exception of dividends received from its and Pinnacle Bank's equity method investments which were reclassified from cash flow from investments to operating cash flow. In January 2016, the FASB issued Accounting Standards Update 2016-01, Financial Instruments – Overall (Subtopic 825-10) which, among other things, (i) requires equity investments, excluding those accounted for under the equity method or that result in consolidation, to be measured at fair value with changes in fair value recognized in net income, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminates the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (viii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity's other deferred tax assets. ASU 2016-01 became effective for Pinnacle Financial in the first quarter of 2018 and continues to have no material impact on its consolidated financial statements. See Note 10. Fair Value of Financial Instruments for disclosure of the fair value of financial instruments based on an exit price notion as required by ASU 2016-01. In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606 ), which was developed as a joint project with the International Accounting Standards Board to remove inconsistencies in revenue requirements and provide a more robust framework for addressing revenue issues. The ASU's core principle is that an entity should recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which an entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued Accounting Standards Update 2015-14 , which deferred the effective date by one year (i.e., interim and annual reporting periods beginning after December 15, 2017). Pinnacle Financial adopted the ASU during the first quarter of 2018, as required, using a modified retrospective approach. The majority of Pinnacle Financial's revenue stream is generated from interest income on loans and securities, which are outside the scope of Topic 606. Pinnacle Financial’s sources of income that fall within the scope of Topic 606 include service charges on deposits, investment services, insurance sales commissions, trust fees, interchange fees and gains and losses on sales of other real estate, all of which are presented within noninterest income. Pinnacle Financial has evaluated the effect of Topic 606 on these fee-based income streams and concluded that adoption of the standard did not materially impact its financial statements. The following is a summary of the implementation considerations for the revenue streams that fall within the scope of Topic 606: • Service charges on deposits, investment services, trust fees and interchange fees — Fees from these services are either transaction based, for which the performance obligations are satisfied when the individual transaction is processed, or set periodic service charges, for which the performance obligations are satisfied over the period the service is provided. Transaction-based fees are recognized at the time the transaction is processed, and periodic service charges are recognized over the service period. The adoption of Topic 606 had no impact on Pinnacle Financial's revenue recognition practice for these services. • Insurance sales commissions — Insurance commissions are received from insurance companies in return for the placement of policies with customers. While additional services, such as claims assistance, may be provided over the term of the policy, the revenues are substantially earned at the time of policy placement. The only contingency in earning the revenue relates to the potential for subsequent cancellation of policies. Accordingly, revenue is recognized at the time of policy placement, net of an allowance for estimated policy cancellations. The adoption of Topic 606 had no impact on Pinnacle Financial's revenue recognition related to insurance sales commissions. • Gains on sales of other real estate — ASU 2014-09 also creates Topic 610-20, under which a gain on sale should be recognized when a contract for sale exists and control of the asset has been transferred to the buyer. Topic 606 lists several criteria which must exist to conclude that a contract for sale exists, including a determination that the institution will collect substantially all of the consideration to which it is entitled. This presents a key difference between the prior and new guidance related to the recognition of the gain when the institution finances the sale of the property. Rather than basing recognition on the amount of the buyer's initial investment, which was the primary consideration under prior guidance, the analysis is now based on various factors including not only the loan to value ratio, but also the credit quality of the borrower, the structure of the loan, and any other factors that may affect collectability. While these differences may affect the decision to recognize or defer gains on sales of other real estate in circumstances where Pinnacle Bank has financed the sale, the effects would not be material to Pinnacle Financial's consolidated financial statements. Recently Issued Accounting Pronouncements, not yet adopted — In August 2018, the FASB issued Accounting Standards Update 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract . ASU 2018-15 requires implementation costs incurred by customers in cloud computing arrangements (i.e., hosting arrangements) to be capitalized under the same premises of authoritative guidance for internal-use software, and deferred over the noncancellable term of the cloud computing arrangements plus any option renewal periods that are reasonably certain to be exercised by the customer or for which the exercise is controlled by the service provider. This update is effective for fiscal years beginning after December 15, 2019, including interim periods within those periods. Early adoption is permitted. If this standard had been effective as of the date of the financial statements included in this report, there would have been no impact on Pinnacle Financial's consolidated financial statements. In August 2018, the FASB issued Accounting Standards Update 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurements. This update is part of the disclosure framework project and eliminates certain disclosure requirements for fair value measurements, requires entities to disclose new information, and modifies existing disclosure requirements. The new disclosure guidance is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted. Pinnacle Financial is currently evaluating the impact this change will have on its consolidated financial statements and disclosures. In February 2018, the FASB issued Accounting Standards Update 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this ASU addressed the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the newly enacted federal corporate tax rate included in the Tax Cuts and Jobs Act issued December 22, 2017. These amendments allow an entity to make a reclassification from other comprehensive income to retained earnings for the difference between the historical corporate income tax rate and the newly enacted corporate income tax rate. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those years. Early adoption is permitted with retrospective application. This standard will not have a material impact on Pinnacle Financial's consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update No. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment to simplify how entities other than private companies, such as public business entities and not-for-profit entities, are required to test goodwill for impairment by eliminating the comparison of the implied fair value of the reporting unit's goodwill with the carrying amount of that goodwill. The amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those periods. If this standard had been effective as of the date of the financial statements included in this report, there would have been no impact on Pinnacle Financial's consolidated financial statements. In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases which requires recognition in the statement of financial position of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The guidance requires that a lessee should recognize lease assets and lease liabilities as compared to previous GAAP that did not require lease assets and lease liabilities to be recognized for operating leases. The guidance becomes effective for Pinnacle Financial on January 1, 2019. Had this standard been effective as of September 30, 2018, we would have recorded a right of use asset and lease liability of approximately $70 million. In July 2016, the FASB issued Accounting Standards Update 2018-10, Codification Improvements to Topic 842, Leases which provides technical corrections and improvements to ASU 2016-02. It is not anticipated that this update will have an impact on our adoption of ASU 2016-02. Also in July 2016, the FASB issued Accounting Standards Update 2018-11, Leases (Topic 842): Targeted Improvements which provides an optional transition method to adopt the new requirements of ASU 2016-02 as of the adoption date with no adjustment to the presentation or disclosure of comparative prior periods included in the financial statements in the period of adoption. Pinnacle Financial intends to elect the optional transition method which will result in presentation of periods prior to adoption under the prior lease guidance of ASC Topic 840. In June 2016, the FASB issued Accounting Standards Update 2016-13 , Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments (CECL), which introduces the current expected credit losses methodology. Among other things, CECL requires the measurement of all expected credit losses for financial assets, including loans and held-to-maturity debt securities, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The new model will require institutions to calculate all probable and estimable losses that are expected to be incurred through the financial asset's entire life through a provision for credit losses, including loans obtained as a result of any acquisition not deemed to be purchased credit deteriorated (PCD). CECL also requires the allowance for credit losses for PCD loans to be determined in a manner similar to that of other financial assets measured at amortized cost; however, the initial allowance will be added to the purchase price rather than recorded as provision expense. The disclosure of credit quality indicators related to the amortized cost of financing receivables will be further disaggregated by year of origination (or vintage). Institutions are to apply the changes through a cumulative-effect adjustment to their retained earnings as of the beginning of the first reporting period in which the standard is effective. The amendments are effective for fiscal years beginning after December 15, 2019. Early application will be permitted for fiscal years beginning after December 15, 2018. Pinnacle Financial is currently assessing the impact of the new guidance on its consolidated financial statements. An increase in the overall allowance for loan losses is likely upon adoption in order to provide for expected credit losses over the life of the loan portfolio. Other than those pronouncements discussed above and those which have been recently adopted, we do not believe there were any other recently issued accounting pronouncements that are expected to materially impact Pinnacle Financial. Subsequent Events — Accounting Standards Codification (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, 2018 through the date of the issued financial statements. Pinnacle Financial entered into multiple hedging transactions in October that have been more fully disclosed in Note 9. Derivative Instruments . Additionally, consistent with the investment policy, during the month of October, Pinnacle Financial sold $ 119.9 million in available-for-sale securities for net unrealized losses, net of tax, of $ 1.1 million. The net unrealized loss will be reclassified from accumulated other comprehensive income into net income. Other than the above-noted transaction, no other subsequent events were noted.

Acquisitions

Acquisitions	9 Months Ended
Acquisitions	Sep. 30, 2018
Business Combinations [Abstract]
Acquisitions	Note 2. Acquisitions BNC Bancorp. On June 16, 2017, Pinnacle Financial consummated its merger with BNC. Pursuant to the terms of the Agreement and Plan of Merger, dated as of January 22, 2017, by and between Pinnacle Financial and BNC, BNC merged with and into Pinnacle Financial, with Pinnacle Financial continuing as the surviving corporation (the BNC Merger). On that same day, Pinnacle Bank and Bank of North Carolina, BNC's wholly-owned bank subsidiary, merged, with Pinnacle Bank continuing as the surviving entity. The following summarizes the consideration paid and an allocation of purchase price to net assets acquired (in thousands): Number of Shares Amount Equity consideration: Common stock issued 27,687,100 $ 1,858,133 Total equity consideration $ 1,858,133 Non-equity consideration: Cash paid to redeem common stock $ 129 Total consideration paid $ 1,858,262 Allocation of total consideration paid: Fair value of net assets assumed including estimated identifiable intangible assets $ 602,689 Goodwill 1,255,573 $ 1,858,262 Pinnacle Financial recorded costs incurred in connection with the issuance of Pinnacle Financial common stock resulting from the BNC Merger of $7.2 million , net of related tax benefits, as a reduction to additional paid in capital. Certain merger-related expenses resulting from cultural and systems integrations, as well as stock-based compensation expense incurred as a result of change-in-control provisions applicable to assumed equity-based awards were recorded as merger-related expense. Goodwill originating from the BNC Merger resulted primarily from anticipated synergies arising from the combination of certain operational areas of the businesses of BNC and Pinnacle Financial as well as the purchase premium inherent in buying a complete and successful banking operation. Goodwill associated with the BNC Merger is not amortizable for book or tax purposes. Adjustments totaling $82.0 million were recorded to goodwill to appropriately reflect the valuation of the acquired loan portfolio, OREO acquired, and certain liabilities assumed and have been included in the table below. Pinnacle Financial accounted for the BNC Merger 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 assumed as of the date of merger. Purchase price allocations related to the acquisition of BNC have been completed and are reflected in the following table (in thousands): As of June 16, 2017 BNC Historical Cost Basis Fair Value Adjustments (1) As Recorded by Pinnacle Financial Assets Cash and cash equivalents $ 155,271 $ — $ 155,271 Investment securities 643,875 1,667 645,542 Loans (2) 5,782,720 (181,430 ) 5,601,290 Mortgage loans held for sale 27,026 — 27,026 Other real estate owned (3) 20,143 1,382 21,525 Core deposit and other intangible (4) — 50,422 50,422 Property, plant and equipment (5) 156,805 (3,341 ) 153,464 Other assets (6) 320,988 54,057 375,045 Total Assets $ 7,106,828 $ (77,243 ) $ 7,029,585 Liabilities Interest-bearing deposits (7) $ 5,003,653 $ 4,355 $ 5,008,008 Non-interest bearing deposits 1,199,342 — 1,199,342 Borrowings (8) 183,389 (6,412 ) 176,977 Other liabilities (9) 35,729 6,840 42,569 Total Liabilities $ 6,422,113 $ 4,783 $ 6,426,896 Net Assets Acquired $ 684,715 $ (82,026 ) $ 602,689 Explanation of certain fair value adjustments: (1) The amount represents the adjustment of the book value of BNC's assets and liabilities to their estimated fair value on the date of acquisition. Fair value adjustments were updated subsequent to the merger date based on the results of finalized valuation assessments. (2) The amount represents the adjustment of the net book value of BNC's loans to their estimated fair value based on interest rates and expected cash flows as of the date of acquisition, which includes estimates of expected credit losses inherent in the portfolio of approximately 2.6% of the 3.1% mark on the acquired loan portfolio. (3) This adjustment reflects the Day 1 value of OREO properties. (4) The amount represents the fair value of the core deposit intangible asset representing the intangible value of the deposit base acquired and the fair value of the customer relationship intangible assets representing the intangible value of customer relationships acquired. (5) The amount represents the adjustment of the net book value of BNC's property, plant and equipment to estimated fair value based on market values of similar assets. (6) The amount represents the deferred tax asset recognized on the fair value adjustment of BNC's acquired assets and assumed liabilities and an adjustment to the Day 1 fair value of an alternative investment. (7) The amount represents the adjustment necessary because the weighted average interest rate of BNC's deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio. (8) The amount represents the combined adjustment necessary because the weighted average interest rate of BNC's subordinated debt issuance exceeded the cost of similar funding at the time of acquisition and because the weighted average interest rate of BNC's trust preferred securities issuances was lower than the cost of similar funding at the time of acquisition. The combined fair value adjustments will be amortized to increase future interest expense over the lives of the instruments. (9) The amount represents the adjustment to accrue obligations that existed but had not been recorded as of the acquisition date and the fair value of BNC lease obligations. Supplemental Pro Forma Combined Results of Operations For the three months ended September 30, 2017, BNC was included in the operations of PNFP and, as such, no supplemental proforma information is necessary. The supplemental proforma information below for the nine months ended September 30, 2017 gives effect to the BNC acquisition as if it had occurred on January 1, 2017. These results combine the historical results of BNC into Pinnacle Financial's consolidated statement of income and, while certain adjustments were made for the estimated impact of certain fair value adjustments, they are not indicative of what would have occurred had the BNC Merger taken place on the indicated date nor are they intended to represent or be indicative of future results of operations. In particular, no adjustments have been made to eliminate the amount of BNC's provision for credit losses for the nine months ended September 30, 2017 that may not have been necessary had the acquired loans been recorded at fair value as of the beginning of 2017. Additionally, these financial statements were not adjusted for non-recurring expenses, such as merger-related expenses incurred by either Pinnacle Financial or BNC. Pinnacle Financial expects to achieve operating cost savings and other business synergies as a result of the acquisition which are also not reflected in the proforma amounts. (dollars in thousands) Nine Months Ended Revenue (1) $ 619,326 Income before income taxes 261,516 (1) Net interest income plus noninterest income.

Equity method investment

Equity method investment	9 Months Ended
Equity method investment	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Equity method investment	Note 3. Equity method investment A summary of BHG's financial position as of September 30, 2018 and December 31, 2017 and results of operations as of and for the three and nine months ended September 30, 2018 and 2017 , were as follows (in thousands): As of September 30, 2018 December 31, 2017 Assets $ 436,693 $ 330,030 Liabilities 322,323 224,837 Membership interests 114,370 105,193 Total liabilities and membership interests $ 436,693 $ 330,030 For the three months ended For the nine months ended 2018 2017 2018 2017 Revenues $ 59,133 $ 41,997 $ 151,937 $ 113,244 Net income $ 30,933 $ 20,428 $ 69,039 $ 54,453 At September 30, 2018 , technology, trade name and customer relationship intangibles, net of related amortization, totaled $11.3 million compared to $13.4 million as of December 31, 2017 . Amortization expense of $693,000 and $2.1 million, respectively, was included for the three and nine months ended September 30, 2018 compared to $832,000 and $2.5 million , respectively, for the same periods in the prior year. Accretion income of $719,000 and $2.2 million, respectively, was included in the three and nine months ended September 30, 2018 compared to $758,000 and $2.3 million, respectively, for the same periods in the prior year. During the three and nine months ended September 30, 2018 , Pinnacle Financial and Pinnacle Bank received dividends from BHG of $10.2 million and $33.7 million , respectively, in the aggregate compared to $4.5 million and $19.4 million , respectively, for the same periods in the prior year. Earnings from BHG are included in Pinnacle Financial's consolidated tax return. Profits from intercompany transactions are eliminated. No loans were purchased from BHG by Pinnacle Bank for the three and nine month periods ended September 30, 2018 or 2017, respectively.

Securities

Securities	9 Months Ended
Securities	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Securities	Note 4. Securities The amortized cost and fair value of securities available-for-sale and held-to-maturity at September 30, 2018 and December 31, 2017 are summarized as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2018: Securities available-for-sale: U.S. Treasury securities $ 30,573 $ — $ 45 $ 30,528 U.S. government agency securities 64,640 45 1,500 63,185 Mortgage-backed securities 1,334,640 3,268 43,363 1,294,545 State and municipal securities 1,240,136 1,995 29,860 1,212,271 Asset-backed securities 334,547 870 759 334,658 Corporate notes and other 69,738 617 960 69,395 $ 3,074,274 $ 6,795 $ 76,487 $ 3,004,582 Securities held-to-maturity: State and municipal securities $ 194,997 $ 9 $ 2,506 $ 192,500 $ 194,997 $ 9 $ 2,506 $ 192,500 December 31, 2017: Securities available-for-sale: U.S. Treasury securities $ 30,505 $ — $ 60 $ 30,445 U.S. government agency securities 182,500 67 1,766 180,801 Mortgage-backed securities 1,270,625 5,318 12,124 1,263,819 State and municipal securities 774,949 12,251 2,588 784,612 Asset-backed securities 173,346 262 316 173,292 Corporate notes and other 81,615 1,346 647 82,314 $ 2,513,540 $ 19,244 17,501 $ 2,515,283 Securities held-to-maturity: State and municipal securities $ 20,762 $ 114 $ 46 $ 20,830 $ 20,762 $ 114 $ 46 $ 20,830 During the third quarter of 2018, Pinnacle Financial transferred, at fair value, $179.8 million of municipal securities from the available-for-sale portfolio to the held-to-maturity portfolio. The related unrealized after tax losses of $ 2.2 million remained in accumulated other comprehensive income (loss) and will be amortized over the remaining life of the securities, offsetting the related amortization of discount on the transferred securities. No gains or losses were recognized at the time of transfer. At September 30, 2018 , approximately $1.35 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, 2018 , repurchase agreements comprised of secured borrowings totaled $130.2 million and were secured by $130.2 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, 2018 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, 2018: Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 34,856 $ 34,802 $ 315 $ 316 Due in one year to five years 77,055 77,059 6,066 6,044 Due in five years to ten years 159,471 157,274 7,997 7,875 Due after ten years 1,133,705 1,106,244 180,619 178,265 Mortgage-backed securities 1,334,640 1,294,545 — — Asset-backed securities 334,547 334,658 — — $ 3,074,274 $ 3,004,582 $ 194,997 $ 192,500 At September 30, 2018 and December 31, 2017 , the following investments had unrealized losses. The table below classifies these investments according to the term of the unrealized losses of less than twelve months or twelve months or longer (in thousands): Investments with an Unrealized Loss of less than 12 months Investments with an Unrealized Loss of 12 months or longer Total Investments with an Unrealized Loss Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses At September 30, 2018 U.S. Treasury securities $ 30,284 $ 39 $ 244 $ 6 $ 30,528 $ 45 U.S. government agency securities 13,605 360 45,118 1,140 58,723 1,500 Mortgage-backed securities 289,149 5,951 807,418 37,412 1,096,567 43,363 State and municipal securities 1,144,600 29,599 108,653 5,663 1,253,253 35,262 Asset-backed securities 204,638 741 4,505 18 209,143 759 Corporate notes 22,329 260 18,681 700 41,010 960 Total temporarily-impaired securities $ 1,704,605 $ 36,950 $ 984,619 $ 44,939 $ 2,689,224 $ 81,889 At December 31, 2017 U.S. Treasury securities $ 29,948 $ 60 $ — $ — $ 29,948 $ 60 U.S. government agency securities 173,677 1,766 — — 173,677 1,766 Mortgage-backed securities 607,408 5,042 285,561 7,082 892,969 12,124 State and municipal securities 115,403 1,408 50,083 1,226 165,486 2,634 Asset-backed securities 68,742 198 14,136 118 82,878 316 Corporate notes 22,168 547 11,944 100 34,112 647 Total temporarily-impaired securities $ 1,017,346 $ 9,021 $ 361,724 $ 8,526 $ 1,379,070 $ 17,547 The applicable dates for determining when securities were in an unrealized loss position were September 30, 2018 and December 31, 2017 . As such, it is possible that a security had a market value that exceeded its amortized cost on other days during the past twelve-month pe riods ended September 30, 2018 and December 31, 2017 , 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, 2018 , Pinnacle Financial had approximately $81.9 million in unrealized losses on $2.69 billion of securities. The unrealized losses associated with the $179.8 million of municipal securities transferred from the available-for-sale portfolio to the held-to-maturity portfolio represent unrealized losses since the date of purchase, independent of the impact associated with changes in the cost basis upon transfer between portfolios. The unrealized losses associated with these investment securities are driven by changes in interest rates and are not due to the credit quality of the securities. These securities will continue to be monitored as a part of Pinnacle Financial's ongoing impairment analysis. Management evaluates the financial performance of the issuers on a quarterly basis to determine if it is probable that the issuers can make all contractual principal and interest payments. Because Pinnacle Financial currently does not intend to sell those securities that have an unrealized loss at September 30, 2018 , and it is not more-likely-than-not that Pinnacle Financial will be required to sell the securities before recovery of their amortized cost bases, which may be maturity, Pinnacle Financial does not consider these securities to be other-than-temporarily impaired at September 30, 2018 . 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. 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, 2018 available-for-sale securities of approximately $ 22.7 million were sold and net unrealized gains, net of tax, of $30,000 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.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
Loans and Allowance for Loan Losses	Sep. 30, 2018
Receivables [Abstract]
Loans and Allowance for Loan Losses	Note 5. Loans and Allowance for Loan Losses For financial reporting purposes, Pinnacle Financial classifies its loan portfolio based on the underlying collateral utilized to secure each loan. This classification is consistent with those utilized in the Quarterly Report of Condition and Income filed by Pinnacle Bank with the Federal Deposit Insurance Corporation (FDIC). Pinnacle Financial uses five loan categories: commercial real estate mortgage, consumer real estate mortgage, construction and land development, commercial and industrial, and consumer and other. • Commercial real estate mortgage loans . Commercial real estate mortgage loans are categorized as such based on investor exposures where repayment is largely dependent upon the operation, refinance, or sale of the underlying real estate. Commercial real estate mortgage loans also includes owner occupied commercial real estate which Pinnacle Financial believes shares a similar risk profile to Pinnacle Financial's commercial and industrial products. • Consumer real estate mortgage loans . Consumer real estate mortgage consists primarily of loans secured by 1-4 family residential properties, including home equity lines of credit. • Construction and land development loans . Construction and land development loans include loans where the repayment is dependent on the successful operation of the related real estate project. Construction and land development loans include 1-4 family construction projects and commercial construction endeavors such as warehouses, apartments, office and retail space and land acquisition and development. • Commercial and industrial loans . Commercial and industrial loans include loans to business enterprises issued for commercial, industrial and/or other professional purposes. • Consumer and other loans . Consumer and other loans include all loans issued to individuals not included in the consumer real estate mortgage classification. Examples of consumer and other loans are automobile loans, credit cards and loans to finance education, among others. Commercial loans receive risk ratings assigned by a financial advisor and approved by a senior credit officer 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. Pinnacle Financial believes that its categories follow those used by Pinnacle Bank's primary regulators. At September 30, 2018 , approximately 81.2% of Pinnacle Financial's loan portfolio was analyzed as a commercial loan type with a specifically assigned risk rating. Consumer loans and small business loans are generally not assigned an individual risk rating but are evaluated as either accrual or nonaccrual based on the performance of the individual loans. However, certain consumer real estate mortgage loans and certain consumer and other loans receive a specific risk rating due to the loan proceeds being used for commercial purposes even though the collateral may be of a consumer loan nature. Risk ratings are subject to continual review by a financial advisor and a senior credit officer. At least annually, Pinnacle Financial's credit procedures require that every risk rated loan of $1.0 million or more be subject to a formal credit risk review process by the assigned financial advisor. Each loan's risk rating is also subject to review by Pinnacle Financial's independent loan review department, which reviews a substantial portion of Pinnacle Financial's risk rated portfolio annually. Included in the coverage are independent loan reviews of loans in targeted higher-risk portfolio segments such as certain commercial and industrial loans, land loans and/or loan types in certain geographies. The following table presents Pinnacle Financial's loan balances by primary loan classification and the amount within each risk rating category. Pass rated loans include all credits other than those included in special mention, substandard, substandard-nonaccrual and doubtful-nonaccrual which are defined as follows: • Special mention loans have potential weaknesses that deserve management's close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in Pinnacle Financial's credit position at some future date. • Substandard loans are inadequately protected by the current net worth and financial capacity of the obligor or of the collateral pledged, if any. Assets so classified must have a well-defined weakness or weaknesses that jeopardize collection of the debt. Substandard loans are characterized by the distinct possibility that Pinnacle Financial could sustain some loss if the deficiencies are not corrected. • Substandard-nonaccrual loans are substandard loans that have been placed on nonaccrual status. • Doubtful-nonaccrual loans have all the characteristics of substandard-nonaccrual loans with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The following table outlines the amount of each loan classification categorized into each risk rating category as of September 30, 2018 and December 31, 2017 (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Total September 30, 2018 Pass $ 7,058,133 $ 2,766,126 $ 2,046,299 $ 4,866,409 $ 366,723 $ 17,103,690 Special Mention 30,291 10,534 3,002 31,213 724 75,764 Substandard (1) 96,729 13,234 6,313 90,345 66 206,687 Substandard-nonaccrual 29,966 25,266 3,395 18,280 961 77,868 Doubtful-nonaccrual — — — — — — Total loans $ 7,215,119 $ 2,815,160 $ 2,059,009 $ 5,006,247 $ 368,474 $ 17,464,009 December 31, 2017 Pass $ 6,487,368 $ 2,503,688 $ 1,880,704 $ 4,014,656 $ 351,359 $ 15,237,775 Special Mention 94,134 18,356 8,148 46,898 1,177 168,713 Substandard (1) 72,044 21,053 13,468 62,529 79 169,173 Substandard-nonaccrual 16,064 18,117 5,968 17,258 48 57,455 Doubtful-nonaccrual — — — — — — Total loans $ 6,669,610 $ 2,561,214 $ 1,908,288 $ 4,141,341 $ 352,663 $ 15,633,116 (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 the impact of nonaccrual loans and troubled debt restructurings. Potential problem loans, which are not included in nonaccrual loans, amounted to approximately $202.5 million at September 30, 2018 , compared to $164.0 million at December 31, 2017 . Loans acquired with deteriorated credit quality are recorded pursuant to the provisions of ASC 310-30, and are referred to as purchase credit impaired loans. The following table provides a rollforward of purchase credit impaired loans from December 31, 2017 through September 30, 2018 (in thousands): Gross Carrying Value Accretable Yield Nonaccretable Yield Net Carrying Value December 31, 2017 $ 74,324 $ (132 ) $ (31,537 ) $ 42,655 Year-to-date settlements (21,332 ) 21 12,262 (9,049 ) September 30, 2018 $ 52,992 $ (111 ) $ (19,275 ) $ 33,606 Certain of these loans have been deemed to be collateral dependent and, as such, no accretable yield has been recorded for these loans. 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. For the three and nine months ended September 30, 2018 , the average balance of impaired loans was $82.3 million and $73.3 million, respectively, compared to $39.5 million and $36.3 million for the same periods in 2017 . Pinnacle Financial's policy is that the accrual of interest income will be discontinued when (1) there is a significant deterioration in the financial condition of the borrower and full repayment of principal and interest is not expected or (2) the principal or interest is more than 90 days past due, unless the loan is both well secured and in the process of collection. As such, at the date the above mentioned loans were placed on nonaccrual status, Pinnacle Financial reversed all previously accrued interest income against current year earnings. Pinnacle Financial's policy is that once a loan is placed on nonaccrual status each subsequent payment is reviewed on a case-by-case basis to determine if the payment should be applied to interest or principal pursuant to regulatory guidelines. Pinnacle Financial recognized no interest income from cash payments received on nonaccrual loans during the nine months ended September 30, 2018 compared to no interest income from cash payments received on nonaccrual loans during the three months ended September 30, 2017 and approximately $65,000 during the nine months ended September 30, 2017 . Had these nonaccruing loans been on accruing status, interest income would have been higher by $1.1 million and $2.8 million, respectively, for the three and nine months ended September 30, 2018 compared to $849,000 and $2.1 million, respectively, higher for the three and nine months ended September 30, 2017 . Impaired loans, as disclosed in the table below, include troubled debt restructurings, nonaccrual loans, and loans deemed to be impaired but that continue to accrue interest. The following tables detail the recorded investment, unpaid principal balance and related allowance of Pinnacle Financial's impaired loans at September 30, 2018 and December 31, 2017 by loan classification (in thousands): At September 30, 2018 At December 31, 2017 Recorded investment Unpaid principal balances Related allowance Recorded investment Unpaid principal balances Related allowance Impaired loans with an allowance: Commercial real estate – mortgage $ 10,282 $ 10,305 $ 461 $ 1,850 $ 1,863 $ 95 Consumer real estate – mortgage 15,746 15,808 490 8,028 8,079 410 Construction and land development 563 564 15 2,522 2,528 66 Commercial and industrial 8,908 8,939 1,265 12,521 12,644 1,627 Consumer and other 961 980 147 — — — Total $ 36,460 $ 36,596 $ 2,378 $ 24,921 $ 25,114 $ 2,198 Impaired loans without an allowance: Commercial real estate – mortgage $ 21,457 $ 21,481 $ — $ 16,364 $ 16,514 $ — Consumer real estate – mortgage 6,382 6,419 — 4,144 4,174 — Construction and land development 2,884 2,883 — 2,645 2,650 — Commercial and industrial 16,678 16,662 — 10,905 10,902 — Consumer and other — — — — — — Total $ 47,401 $ 47,445 $ — $ 34,058 $ 34,240 $ — Total impaired loans $ 83,861 $ 84,041 $ 2,378 $ 58,979 $ 59,354 $ 2,198 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, 2018 and 2017 , respectively, of impaired loans by loan classification (in thousands): For the three months ended For the nine months ended 2018 2017 2018 2017 Average recorded investment Interest income recognized Average recorded investment Interest income recognized Average recorded investment Interest income recognized Average recorded investment Interest income recognized Impaired loans with an allowance: Commercial real estate – mortgage $ 13,474 $ — $ 264 $ — $ 9,297 $ — $ 350 $ — Consumer real estate – mortgage 14,162 — 4,593 — 11,476 — 4,230 — Construction and land development 1,150 — 81 — 1,301 — 78 — Commercial and industrial 7,470 — 12,235 — 9,345 — 10,068 — Consumer and other 912 — 362 — 651 — 532 — Total $ 37,168 $ — $ 17,535 $ — $ 32,070 $ — $ 15,258 $ — Impaired loans without an allowance: Commercial real estate – mortgage $ 22,029 $ — $ 6,981 $ — $ 18,702 $ — $ 4,638 $ — Consumer real estate – mortgage 5,699 — 7,003 — 5,034 — 6,122 — Construction and land development 1,442 — 1,324 — 1,382 — 1,702 65 Commercial and industrial 16,008 — 6,673 — 16,096 — 8,573 — Consumer and other — — — — — — — — Total $ 45,178 $ — $ 21,981 $ — $ 41,214 $ — $ 21,035 $ 65 Total impaired loans $ 82,346 $ — $ 39,516 $ — $ 73,284 $ — $ 36,293 $ 65 At September 30, 2018 and December 31, 2017 , there were $6.1 million and $6.6 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, 2018 and 2017 (dollars in thousands): Three months ended Nine months ended 2018 Number of contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, net of related allowance Number of contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, net of related allowance Commercial real estate – mortgage — $ — $ — — $ — $ — Consumer real estate – mortgage 1 169 169 2 206 206 Construction and land development 1 348 348 1 348 348 Commercial and industrial — — — — — — Consumer and other — — — — — — 2 $ 517 $ 517 3 $ 554 $ 554 2017 Commercial real estate – mortgage — $ — $ — — $ — $ — Consumer real estate – mortgage — — — 1 7 5 Construction and land development — — — — — — Commercial and industrial 1 501 145 3 2,472 1,773 Consumer and other — — — — — — 1 $ 501 $ 145 4 $ 2,479 $ 1,778 During the nine months ended September 30, 2018 and 2017 , Pinnacle Financial did not have any troubled debt restructurings that subsequently defaulted within twelve months of the restructuring. At both September 30, 2018 and December 31, 2017, the allowance for loan losses included no allowance specifically related to accruing troubled debt restructurings, which are classified as impaired loans pursuant to U.S. GAAP, but which loans continued to accrue interest at contractual rates at those dates. In addition to the loan metrics above, Pinnacle Financial analyzes its commercial loan portfolio to determine if a concentration of credit risk exists to any industries. Pinnacle Financial utilizes broadly accepted industry classification systems in order to classify borrowers into various industry classifications. Pinnacle Financial has a credit exposure (loans outstanding plus unfunded lines of credit) exceeding 25% of Pinnacle Bank's total risk-based capital to borrowers in the following industries at September 30, 2018 with the comparative exposures for December 31, 2017 (in thousands): September 30, 2018 Outstanding Principal Balances Unfunded Commitments Total exposure Total Exposure at December 31, Lessors of nonresidential buildings $ 3,146,798 $ 692,316 $ 3,839,114 $ 3,483,597 Lessors of residential buildings 983,084 269,344 1,252,428 1,151,676 Hotels (except Casino Hotels) and Motels 760,355 157,315 917,670 836,320 New Housing For-Sale Builders 459,501 567,914 1,027,415 780,137 Additionally, Pinnacle Financial monitors two ratios regarding construction and commercial real estate lending as part of its concentration management processes. Both ratios are calculated by dividing certain types of loan balances for each of the two categories by Pinnacle Bank’s total risk-based capital. At September 30, 2018 and December 31, 2017 , Pinnacle Bank’s construction and land development loans as a percentage of total risk-based capital were 87.8% and 89.4% , 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 287.6% and 297.1% as of September 30, 2018 and December 31, 2017 , 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. While Pinnacle Bank was in excess of the 300% guideline for the first six months of 2018, at September 30, 2018 , 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 to below the 100% and 300% thresholds. The table below presents past due balances by loan classification and segment at September 30, 2018 and December 31, 2017 , allocated between accruing and nonaccrual status (in thousands): Accruing Nonaccruing September 30, 2018 30-89 days past due and accruing 90 days or more past due and accruing Total past due and accruing Current and accruing Purchase credit impaired Nonaccrual (1) Nonaccruing purchase credit impaired Total loans Commercial real estate: Owner-occupied $ 7,756 $ — $ 7,756 $ 2,656,228 $ 2,769 $ 19,738 $ 1,754 $ 2,688,245 All other 2,633 — 2,633 4,504,385 11,382 5,591 2,883 4,526,874 Consumer real estate – mortgage 13,358 — 13,358 2,772,801 3,735 19,165 6,101 2,815,160 Construction and land development 3,368 — 3,368 2,049,468 2,778 2,024 1,371 2,059,009 Commercial and industrial 10,741 1,128 11,869 4,975,290 808 18,256 24 5,006,247 Consumer and other 4,361 645 5,006 362,507 — 961 — 368,474 Total $ 42,217 $ 1,773 $ 43,990 $ 17,320,679 $ 21,472 $ 65,735 $ 12,133 $ 17,464,009 Accruing Nonaccruing December 31, 2017 30-89 days past due and accruing 90 days or more past due and accruing Total past due and accruing Current and accruing Purchase credit impaired Nonaccrual (1) Nonaccruing purchase credit impaired Total loans Commercial real estate: Owner-occupied $ 6,772 $ 104 $ 6,876 $ 2,435,819 $ 4,820 $ 11,395 $ 1,105 $ 2,460,015 All other 16,559 — 16,559 4,177,454 12,018 704 2,860 4,209,595 Consumer real estate – mortgage 14,835 1,265 16,100 2,521,748 5,249 9,320 8,797 2,561,214 Construction and land development 4,136 146 4,282 1,894,560 3,478 2,878 3,090 1,908,288 Commercial and industrial 7,406 1,348 8,754 4,114,127 1,154 17,222 84 4,141,341 Consumer and other 6,311 1,276 7,587 345,076 — — — 352,663 Total $ 56,019 $ 4,139 $ 60,158 $ 15,488,784 $ 26,719 $ 41,519 $ 15,936 $ 15,633,116 (1) Approximately $54.6 million and $45.8 million of nonaccrual loans as of September 30, 2018 and December 31, 2017 , respectively, were performing pursuant to their contractual terms at those dates . The following table details the changes in the allowance for loan losses for the three and nine months ended September 30, 2018 and 2017 , respectively, by loan classification (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total Three months ended September 30, 2018: Balance at June 30, 2018 $ 24,848 $ 5,853 $ 10,984 $ 28,338 $ 5,172 $ 475 $ 75,670 Charged-off loans (1,968 ) (262 ) (24 ) (3,336 ) (1,359 ) — (6,949 ) Recovery of previously charged-off loans 63 987 70 1,037 382 — 2,539 Provision for loan losses 3,574 149 (48 ) 4,085 618 347 8,725 Balance at September 30, 2018 $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 Three months ended September 30, 2017: Balance at June 30, 2017 $ 16,002 $ 7,835 $ 5,126 $ 24,235 $ 7,549 $ 1,197 $ 61,944 Charged-off loans (572 ) (395 ) (99 ) (1,625 ) (3,296 ) — (5,987 ) Recovery of previously charged-off loans 169 565 716 562 270 — 2,282 Provision for loan losses 5,191 (2,702 ) 1,780 235 2,396 20 6,920 Balance at September 30, 2017 $ 20,790 $ 5,303 $ 7,523 $ 23,407 $ 6,919 $ 1,217 $ 65,159 Nine months ended September 30, 2018: Balance at December 31, 2017 $ 21,188 $ 5,031 $ 8,962 $ 24,863 $ 5,874 $ 1,322 $ 67,240 Charged-off loans (2,930 ) (1,533 ) (36 ) (7,600 ) (10,217 ) — (22,316 ) Recovery of previously charged-off loans 1,517 2,190 1,645 2,492 2,159 — 10,003 Provision for loan losses 6,742 1,039 411 10,369 6,997 (500 ) 25,058 Balance at September 30, 2018 $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 Nine months ended September 30, 2017: Balance at December 31, 2016 $ 13,655 $ 6,564 $ 3,624 $ 24,743 $ 9,520 $ 874 $ 58,980 Charged-off loans (581 ) (663 ) (99 ) (3,278 ) (11,687 ) — (16,308 ) Recovery of previously charged-off loans 184 1,147 845 1,264 1,663 — 5,103 Provision for loan losses 7,532 (1,745 ) 3,153 678 7,423 343 17,384 Balance at September 30, 2017 $ 20,790 $ 5,303 $ 7,523 $ 23,407 $ 6,919 $ 1,217 $ 65,159 The following table details the allowance for loan losses and recorded investment in loans by loan classification and by impairment evaluation method as of September 30, 2018 and December 31, 2017 , respectively (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total September 30, 2018 Allowance for Loan Losses: Collectively evaluated for impairment $ 26,047 $ 6,235 $ 10,967 $ 28,859 $ 4,666 $ 76,774 Individually evaluated for impairment 461 490 15 1,265 147 2,378 Loans acquired with deteriorated credit quality (1) 9 2 — — — 11 Total allowance for loan losses $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 Loans: Collectively evaluated for impairment $ 7,164,591 $ 2,783,196 $ 2,051,413 $ 4,979,829 $ 367,513 $ 17,346,542 Individually evaluated for impairment 31,739 22,128 3,447 25,586 961 83,861 Loans acquired with deteriorated credit quality 18,789 9,836 4,149 832 — 33,606 Total loans $ 7,215,119 $ 2,815,160 $ 2,059,009 $ 5,006,247 $ 368,474 $ 17,464,009 December 31, 2017 Allowance for Loan Losses: Collectively evaluated for impairment $ 20,753 $ 4,460 $ 8,879 $ 23,181 $ 5,874 $ 63,147 Individually evaluated for impairment 95 410 66 1,627 — 2,198 Loans acquired with deteriorated credit quality (1) 340 161 17 55 — 573 Total allowance for loan losses $ 21,188 $ 5,031 $ 8,962 $ 24,863 $ 5,874 $ 1,322 $ 67,240 Loans: Collectively evaluated for impairment $ 6,630,593 $ 2,534,996 $ 1,896,553 $ 4,116,677 $ 352,663 $ 15,531,482 Individually evaluated for impairment 18,214 12,172 5,167 23,426 — 58,979 Loans acquired with deteriorated credit quality 20,803 14,046 6,568 1,238 — 42,655 Total loans $ 6,669,610 $ 2,561,214 $ 1,908,288 $ 4,141,341 $ 352,663 $ 15,633,116 (1) Loans acquired with deteriorated credit quality are recorded at fair value at the time of acquisition. An allowance for loan losses is recorded resulting from subsequent credit deterioration. The adequacy of the allowance for loan losses is assessed at the end of each calendar quarter. The level of the allowance is based upon evaluation of the loan portfolio, current asset quality trends, known and inherent risks in the portfolio, adverse situations that may affect the borrowers' ability to repay (including the timing of future payment), the estimated value of any underlying collateral, composition of the loan portfolio, economic conditions, historical loss experience, industry and peer bank loan quality indications and other pertinent factors, including regulatory recommendations. The allowance for loan losses for purchased loans is calculated similarly to the method utilized for legacy Pinnacle Bank loans. Pinnacle Financial's accounting policy is to compare the computed allowance for loan losses for purchased loans on a loan-by-loan basis to any remaining fair value adjustment. If the computed allowance is greater than the remaining fair value adjustment, the excess is added to the allowance for loan losses by a charge to the provision for loan losses. At September 30, 2018 , Pinnacle Bank had granted loans and other extensions of credit amounting to approximately $38.6 million to current directors, executive officers, and their related entities, of which $19.6 million had been drawn upon. At December 31, 2017 , Pinnacle Bank had granted loans and other extensions of credit amounting to approximately $26.4 million to directors, executive officers, and their related entities, of which approximately $16.1 million had been drawn upon. None of these loans to directors, executive officers, and their related entities were impaired at September 30, 2018 or December 31, 2017 . At September 30, 2018 , Pinnacle Financial had approximately $11.4 million in commercial loans held for sale compared to $25.5 million at December 31, 2017, 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, 2018 , Pinnacle Financial had approximately $46.3 million of mortgage loans held-for-sale compared to approximately $102.7 million at December 31, 2017 . Total loan volumes sold during the nine months ended September 30, 2018 were approximately $917.9 million compared to approximately $756.7 million for the nine months ended September 30, 2017 . During the three and nine months ended September 30, 2018 , Pinnacle Financial recognized $3.9 million and $11.4 million, respectively, in gains on the sale of these loans, net of commissions paid, compared to $6.0 million and $14.8 million, respectively, net of commissions paid, during the three and nine months ended September 30, 2017 . These mortgage loans held-for-sale are originated internally and are primarily to borrowers in Pinnacle Bank's geographic markets. These sales are typically on a mandatory basis to investors that follow conventional government sponsored entities (GSE) and the Department of Housing and Urban Development/U.S. Department of Veterans Affairs (HUD/VA) guidelines. Each purchaser of a mortgage loan held-for-sale has specific guidelines and criteria for sellers of loans and the risk of credit loss with regard to the principal amount of the loans sold is generally transferred to the purchasers upon sale. While the loans are sold without recourse, the purchase agreements require Pinnacle Bank to make certain representations and warranties regarding the existence and sufficiency of file documentation and the absence of fraud by borrowers or other third parties such as appraisers in connection with obtaining the loan. If it is determined that the loans sold were in breach of these representations or warranties, Pinnacle Bank has obligations to either repurchase the loan for the unpaid principal balance and related investor fees or make the purchaser whole for the economic benefits of the loan. To date, Pinnacle Bank's liability pursuant to the terms of these representations and warranties has been insignificant to Pinnacle Bank.

Income Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 6. 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 $2.8 million at September 30, 2018 compared to $1.3 million at September 30, 2017 . 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, 2018 and 2017 . 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, 2018 there were no interest and penalties recorded in the income statement compared to no interest and penalties for the three months ended and $22,000 in interest and penalties for the nine months ended September 30, 2017 , respectively. Pinnacle Financial's effective tax rate for the three and nine months ended September 30, 2018 was 20.7% and 20.3% , respectively, compared to 35.2% and 31.9% , respectively, for the three and nine months ended September 30, 2017 , primarily due to the reduction in the statutory corporate tax rate following the enactment of the Tax Cuts and Jobs Act in December 2017. The difference between the effective tax rate and the federal and state income tax statutory rate of 26.14% at September 30, 2018 and 39.23% at September 30, 2017 is primarily due to investments in bank qualified municipal securities, tax benefits of Pinnacle Financial'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 and FDIC premiums. Additionally, in March 2016, the FASB issued updated guidance to Accounting Standards Update, 2016-09 Stock Compensation Improvements to Employee Share-Based Payment Activity (ASU 2016-09) intended to simplify and improve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of such awards as either equity or liabilities and classification of such awards on the statement of cash flows. The guidance became effective for Pinnacle Financial on January 1, 2017. Included in income tax expense for the three and nine months ended September 30, 2018 were excess tax benefits of $199,000 and $3.0 million , respectively, recognized upon the lapse of restrictions on stock awards and stock options exercises, compared to $59,000 and $4.6 million, respectively, for the three and nine months ended September 30, 2017 .

Commitments and Contingent Liab

Commitments and Contingent Liabilities	9 Months Ended
Commitments and Contingent Liabilities	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Note 7. 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, 2018 , these commitments amounted to $6.46 billion , of which approximately $949.9 million 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, 2018 , these commitments amounted to $177.8 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, 2018 , Pinnacle Financial had accrued $2.9 million for the inherent risks associated with these off-balance sheet commitments compared to $3.1 million at December 31, 2017. Various legal claims also arise from time to time in the normal course of business. In the opinion of management, the resolution of these claims outstanding at September 30, 2018 will not 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
Stock Options and Restricted Shares	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Options and Restricted Shares	Note 8. Stock Options and Restricted Shares At Pinnacle Financial's annual shareholders' meeting on April 17, 2018, the shareholders of Pinnacle Financial adopted the 2018 Omnibus Equity Incentive Plan (the "2018 Plan"). The 2018 Plan subsumed the then existing Pinnacle Financial Partners, Inc. 2014 Equity Incentive Plan (the "2014 Plan") including the approximately 500,000 shares in the aggregate that remained available for issuance thereunder on the date the 2018 Plan was approved by shareholders and increased the maximum number of shares of common stock that may be issued to associates, directors and contractors of Pinnacle Financial and Pinnacle Bank by an additional 1.2 million shares. 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, 2018 , there were approximately 1.7 million shares available for issuance under the 2018 Plan. The BNC Bancorp 2013 Amended and Restated Omnibus Stock Incentive Plan (the "BNC Plan") was assumed by Pinnacle Financial in connection with the BNC Merger. As of September 30, 2018 , the BNC Plan had approximately 9,000 shares remaining available for issuance to existing associates that were previously BNC associates in future periods. No new awards may be granted under plans other than the 2018 Plan except for shares remaining available for issuance to the former BNC associates pursuant to the BNC Plan. Upon the acquisition of CapitalMark, Pinnacle Financial assumed approximately 858,000 stock options under the CapitalMark Option Plan. No further shares remain available for issuance under the CapitalMark Option Plan. No options were assumed upon the acquisition of Magna, Avenue or BNC as all preexisting Magna, Avenue and BNC stock options were converted to cash upon acquisition. At September 30, 2018, 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, 2018 and information regarding expected vesting, contractual terms remaining, intrinsic values and other matters is as follows: Number Weighted-Average Exercise Price Weighted-Average Contractual Remaining Term (in years) Aggregate Intrinsic Value (000's) Outstanding at December 31, 2017 274,586 $ 21.40 3.06 $ 12,329 (1) Granted — Exercised (90,497 ) Forfeited — Outstanding at September 30, 2018 184,089 $ 22.67 3.54 $ 6,900 (2) Options exercisable at September 30, 2018 184,089 $ 22.67 3.54 $ 6,900 (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 $66.30 per common share at December 31, 2017 for the 274,586 options that were in-the-money at December 31, 2017 . (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 $60.15 per common share at September 30, 2018 for the 184,089 options that were in-the-money at September 30, 2018 . 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, 2018 is as follows: Number Grant Date Weighted-Average Cost Unvested at December 31, 2017 936,135 $ 50.08 Shares awarded 160,638 Conversion of previously awarded restricted share units to restricted share awards 6,200 Restrictions lapsed and shares released to associates/directors (352,595 ) Shares forfeited (1) (25,547 ) Unvested at September 30, 2018 724,831 $ 55.77 (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, senior management and outside directors with a combination of time and, in the case of senior management, performance vesting criteria. The following table outlines restricted stock grants that were awarded, grouped by similar vesting criteria, during the nine months ended September 30, 2018 : Grant Year Group (1) Vesting Period in years Shares awarded Restrictions Lapsed and shares released to participants Shares Forfeited by participants (6) Shares Unvested Time Based Awards 2018 Associates (2) 3 - 5 127,789 224 2,783 124,782 2018 Associates (3) 3 - 5 16,777 — 500 16,277 Performance Based Awards 2018 Leadership team (4) 3 6,200 4,340 1,860 — Outside Director Awards (5) 2018 Outside directors 1 16,072 1,148 — 14,924 (1) Groups include employees (referred to as associates above), the leadership team which includes our named executive officers and other key senior leadership members, 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 and time-based vesting awards to Pinnacle Financial's executive officers, 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 issued to associates that were former associates of BNC pursuant to legacy BNC incentive plans assumed by Pinnacle Financial. (4) Reflects conversion of restricted share units issued in prior years to restricted share awards. The forfeiture restrictions on these restricted share awards lapse in separate equal installments should Pinnacle Financial achieve certain soundness targets over each year of the subsequent vesting period. See further details of these awards under the caption "Restricted Share Units" below. (5) 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, 2019 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. (6) These shares represent forfeitures resulting from recipients whose employment or board membership is terminated during the year-to-date period ended September 30, 2018 or for which the performance criteria applicable to the award are not achieved. Any dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination or will not be distributed from escrow, as applicable. Restricted Share Units The following table details the restricted share unit awards outstanding at September 30, 2018 : Units Awarded Grant year Named Executive Officers (NEOs) (1) Leadership Team other than NEOs Applicable Performance Periods associated with each tranche (fiscal year) Service period per tranche (in years) Subsequent holding period per tranche (in years) Shares settled into RSAs as of period end (2) 2018 96,878-145,339 25,990 2018 2 3 N/A 2019 2 2 N/A 2020 2 1 N/A 2017 72,537-109,339 24,916 2017 2 3 N/A 2018 2 2 N/A 2019 2 1 N/A 2016 73,474-110,223 26,683 2016 2 3 N/A 2017 2 2 N/A 2018 2 1 N/A 2015 58,200-101,850 28,378 2015 2 3 N/A 2016 2 2 N/A 2017 2 1 N/A (1) The named executive officers are awarded a range of awards that may be earned based on attainment of goals between a target level of performance and a maximum level of performance. (2) Restricted share unit awards granted in 2018, 2017, 2016 and 2015 will be earned if certain performance targets (and service periods) are achieved. Additional forfeiture restrictions may thereafter lapse based on Pinnacle Financial's attainment of certain soundness thresholds in future periods and thereafter the unit awards will be settled in shares of Pinnacle Financial common stock. Stock compensation expense related to restricted share awards and restricted share units for the three and nine months ended September 30, 2018 was $4.5 million and $13.3 million, respectively, compared to $5.8 million and $14.4 million for the three and nine months ended September 30, 2017 . As of the September 30, 2018 , the total compensation cost related to unvested restricted share awards and restricted share units not yet recognized was $ 35.7 million. This expense is expected to be recognized over a weighted-average period of 2.9 years.

Derivative Instruments

Derivative Instruments	9 Months Ended
Derivative Instruments	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Note 9. 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. For derivatives not designated as hedges, the gain or loss is recognized in current period earnings. Non-hedge derivatives 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 are derivatives, but are not designated as hedging instruments. The income statement impact of the offsetting positions is limited to changes in the reserve for counterpary risk. A summary of Pinnacle Financial's interest rate swaps related to customers as of September 30, 2018 and December 31, 2017 is included in the following table (in thousands): September 30, 2018 December 31, 2017 Balance Sheet Location Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Interest rate swap agreements: Pay fixed / receive variable swaps Other assets $ 972,816 $ 24,592 $ 748,625 $ 13,771 Pay variable / receive fixed swaps Other liabilities 972,816 (28,436 ) 748,625 (13,866 ) Open trade equity Other assets — 3,707 — — Total $ 1,945,632 $ (137 ) $ 1,497,250 $ (95 ) Amount of Gain (Loss) Recognized in Income Location of Gain (Loss) Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Interest rate swap agreements Other noninterest income $ (8 ) $ 7 $ (42 ) $ 20 Derivatives designated as cash flow hedges For derivative instruments that are designated and qualify as a cash flow hedge, the aggregate fair value of the derivative instrument is recorded in other assets or other liabilities with any gain or loss related to changes in fair value recorded in accumulated other comprehensive income, net of tax. The gain or loss is reclassified into earnings in the same period during which the hedged asset or liability affects earnings and is presented in the same income statement line item as the earnings effect of the hedged asset or liability. Pinnacle Financial uses forward cash flow hedge relationships in an effort to manage future interest rate exposure. 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, 2018 and December 31, 2017 are as follows (in thousands): September 30, 2018 December 31, 2017 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Asset derivatives Interest rate swap agreements Other assets 2.51 2.61% 3 month LIBOR $ 134,000 $ 982 $ — $ — Liability derivatives Interest rate swap agreements Other assets 3.89 3.14% 3 month LIBOR $ 66,000 $ (311 ) $ 200,000 $ (4,583 ) 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, 2018 and 2017 were as follows: Amount of Gain Recognized in Other Comprehensive Income Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Interest rate swap agreements $ 783 $ 239 $ 3,453 $ 1,307 The cash flow hedges were determined to be highly effective during the periods presented and as a result qualify for hedge accounting treatment. If a hedge was deemed to be ineffective, the amount included in accumulated other comprehensive (loss) income would be reclassified into a line item within the statement of income that impacts operating results. The hedge would no longer be considered effective if a portion of the hedge becomes ineffective, the item hedged is no longer in existence or Pinnacle Financial discontinues hedge accounting. Pinnacle Financial expects the hedges to continue to be highly effective and qualify for hedge accounting during the remaining terms of the swaps. No amounts were reclassified from accumulated other comprehensive income into net income related to these derivatives during the nine months ended September 30, 2018 or 2017 , and no amounts are expected to be reclassified from accumulated other comprehensive income into net income over the next twelve months. On October 24, 2018, cash flow swaps with a notional amount of $ 101.0 million were terminated resulting in a cash settlement equal to previously unrealized gains of $ 1.0 million. These gains are included in accumulated other comprehensive income and will be amortized into net income over the remaining contractual terms of the swaps. Derivatives designated as fair value hedges For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged asset or liability attributable to the hedged risk are recognized in current earnings. The gain or loss on the derivative instrument is presented on the same income statement line item as the earnings effect of the hedged item. Pinnacle Financial utilizes interest rate swaps designated as fair value hedges to mitigate the effect of changing interest rates on the fair values of fixed rate callable securities available-for-sale and fixed rate prepayable loans. The hedging strategy on securities converts the fixed interest rates to LIBOR-based variable interest rates. These derivatives are designated as partial term hedges of selected cash flows covering specified periods of time prior to the call dates of the hedged securities. Pinnacle Financial has elected early adoption of FASB ASU 2017-12, which allows such partial term hedge designations. Pinnacle Financial also utilizes interest rate swaps designated as fair value hedges to mitigate the effect of changing interest rates on the fair values of the loans. As allowed under FASB ASU 2017-12, a specified portion of the prepayable loans have been designated as the hedged assets under the "last-of-layer" method. Such hedging designations are allowed on the portion of a closed portfolio of prepayable assets that is not expected to be affected by prepayments, defaults, and other factors affecting the timing and amount of cash flows. A summary of Pinnacle Financial's fair value hedge relationships as of September 30, 2018 and December 31, 2017 are as follows (in thousands): September 30, 2018 December 31, 2017 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Asset derivatives Interest rate swap agreements - securities Other assets 7.14 2.89% 3 month LIBOR $ 154,145 $ 1,991 $ — $ — Interest rate swap agreements - loans Other assets 2.89 2.77% 3 month LIBOR 900,000 3,358 — — 3.51 2.79% $ 1,054,145 $ 5,349 $ — $ — The effects of Pinnacle Financial's fair value hedge relationships on the income statement during the three and nine months ended September 30, 2018 and 2017 were as follows: Location of Gain on Derivative Amount of Gain Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Asset derivatives 2018 2017 2018 2017 Interest rate swap agreements - securities Interest income on securities $ 1,755 $ — $ 1,991 $ — Interest rate swap agreements - loans Interest income on loans $ 2,236 $ — $ 3,358 $ — Location of Loss on Hedged Item Amount of Loss Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Asset derivatives 2018 2017 2018 2017 Interest rate swap agreements - securities Interest income on securities $ (1,755 ) $ — $ (1,991 ) $ — Interest rate swap agreements - loans Interest income on loans $ (2,236 ) $ — $ (3,358 ) $ — The following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges at September 30, 2018 and December 31, 2017 : Carrying Amount of the Hedged Assets Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 Line item on the balance sheet Securities available-for-sale $ 147,155 $ — $ (1,991 ) $ — Loans (1) $ 896,642 $ — $ (3,358 ) $ — (1) The carrying amount as shown represents the designated last-of-layer. At September 30, 2018, the total amortized cost basis of the closed portfolio of loans designated in these hedging relationships was $ 2.8 billion. On October 23, 2018, Pinnacle Financial entered into an additional swap transaction with a notional amount of $ 176.8 million designated as fair value hedges. These derivatives are intended to protect against the effects of changing interest rates on the fair values of fixed rate securities. As allowed under FASB ASU 2017-12, these derivatives are designated as partial term hedges covering specified periods of time prior to the call dates of the hedged securities.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
Fair Value of Financial Instruments	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 10. 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, cash flow hedge agreements and interest rate locks associated with the mortgage loan pipeline. The carrying amount of interest rate swap agreements is based on Pinnacle Financial's pricing models that utilize observable market inputs. The fair value of the cash flow hedge agreements is determined by calculating the difference between the discounted fixed rate cash flows and the discounted variable rate cash flows. The fair value of the mortgage loan pipeline is based upon the projected sales price of the underlying loans, taking into account market interest rates and other market factors at the measurement date, net of the projected fallout rate. Pinnacle Financial reflects these assets within Level 2 of the valuation hierarchy as these assets are valued using similar transactions that occur in the market. Impaired loans – A loan is classified as impaired when it is probable Pinnacle Financial will be unable to collect all principal and interest payments due in accordance with the contractual terms of the loan agreement. Impaired loans are measured based on the present value of expected payments using the loan's original effective rate as the discount rate, the loan's observable market price, or the fair value of the collateral less selling costs if the loan is collateral dependent. If the recorded investment in the impaired loan exceeds the measure of fair value, a valuation allowance may be established as a component of the allowance for loan losses or the difference may be recognized as a charge-off. Impaired loans are classified within Level 3 of the hierarchy due to the unobservable inputs used in determining their fair value such as collateral values and the borrower's underlying financial condition. Other real estate owned – Other real estate owned (OREO) represents real estate foreclosed upon by Pinnacle Bank through loan defaults by customers or acquired by deed in lieu of foreclosure. Substantially all 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 and the cash flow hedge 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, 2018 and December 31, 2017 , by caption on the consolidated balance sheets and by FASB ASC 820 valuation hierarchy (as described above) (in thousands): Total carrying value in the consolidated balance sheet Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) September 30, 2018 Investment securities available-for-sale: U.S. Treasury securities $ 30,528 $ — $ 30,528 $ — U.S. government agency securities 63,185 — 63,185 — Mortgage-backed securities 1,294,545 — 1,294,545 — State and municipal securities 1,212,271 — 1,196,917 15,354 Agency-backed securities 334,658 — 334,658 — Corporate notes and other 69,395 — 69,395 — Total investment securities available-for-sale $ 3,004,582 $ — $ 2,989,228 $ 15,354 Other investments 49,351 — 24,169 25,182 Other assets 34,700 — 34,700 — Total assets at fair value $ 3,088,633 $ — $ 3,048,097 $ 40,536 Other liabilities $ 26,727 $ — $ 26,727 $ — Total liabilities at fair value $ 26,727 $ — $ 26,727 $ — December 31, 2017 Investment securities available-for-sale: U.S. Treasury securities $ 30,445 $ — $ 30,445 $ — U.S. government agency securities 180,801 — 180,801 — Mortgage-backed securities 1,263,819 — 1,263,819 — State and municipal securities 784,612 — 767,583 17,029 Agency-backed securities 173,292 — 173,292 — Corporate notes and other 82,314 — 82,314 — Total investment securities available-for-sale 2,515,283 — 2,498,254 17,029 Other investments 53,796 — 24,922 28,874 Other assets 11,812 — 11,812 — Total assets at fair value $ 2,580,891 $ — $ 2,534,988 $ 45,903 Other liabilities $ 13,886 $ — $ 13,886 $ — Total liabilities at fair value $ 13,886 $ — $ 13,886 $ — The following table presents assets measured at fair value on a nonrecurring basis as of September 30, 2018 and December 31, 2017 (in thousands): September 30, 2018 Total carrying value in the consolidated balance sheet Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) Total gains (losses) for the year-to-date period then ended Other real estate owned $ 17,467 $ — $ — $ 17,467 $ 259 Impaired loans, net (1) 34,082 — — 34,082 (133 ) Total $ 51,549 $ — $ — $ 51,549 $ 126 December 31, 2017 Other real estate owned $ 27,831 $ — $ — $ 27,831 $ 203 Impaired loans, net (1) 22,723 — — 22,723 (4 ) Total $ 50,554 $ — $ — $ 50,554 $ 199 (1) Amount is net of valuation allowance of $2.4 million and $2.2 million at September 30, 2018 and December 31, 2017 , respectively, as required by ASC 310-10, "Receivables." In the case of the investment securities portfolio, Pinnacle Financial monitors the portfolio to ascertain when transfers between levels have been affected. The nature of the remaining assets and liabilities is such that transfers in and out of any level are expected to be rare. For the nine months ended September 30, 2018 , there were transfers between Levels 1, 2 or 3 of $12.2 million. Transfers out of Level 3 of the valuation hierarchy represent equity securities for which the fair values have been deemed to be not readily determinable and for which the securities are currently carried at cost and evaluated for impairment. The table below includes a rollforward of the balance sheet amounts for the three and nine months ended September 30, 2018 and September 30, 2017 (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, 2018 2017 2018 2017 Available-for-sale Securities Other Available-for-sale Securities Other Available-for-sale Securities Other assets Available-for-sale Securities Other assets Fair value, beginning of period $ 15,290 $ 23,578 $ — $ 27,850 $ 17,029 $ 28,874 $ — $ 10,478 Total realized gains included in income 30 81 — 188 90 2,858 — 625 Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at September 30 34 — — — (597 ) — — — Acquired — — — — — — — 17,062 Purchases — 2,455 — 815 — 7,273 — 1,584 Issuances — — — — — — — — Settlements — (932 ) — (376 ) (1,168 ) (1,657 ) — (1,272 ) Transfers out of Level 3 — — — — — (12,166 ) — — Fair value, end of period $ 15,354 $ 25,182 $ — $ 28,477 $ 15,354 $ 25,182 $ — $ 28,477 Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at September 30 $ 30 $ 81 $ — $ 188 $ 90 $ 2,858 $ — $ 625 The following methods and assumptions were used by Pinnacle Financial in estimating its fair value disclosures for financial instruments that are not measured at fair value. In cases where quoted market prices are not available, fair values are based on estimates using discounted cash flow models. Those models are significantly affected by the assumptions used, including the discount rates, estimates of future cash flows and borrower creditworthiness. The fair value estimates presented herein are based on pertinent information available to management as of September 30, 2018 and December 31, 2017 . Such amounts have not been revalued for purposes of these consolidated financial statements since those dates and, therefore, current estimates of fair value may differ significantly from the amounts presented herein. Securities held-to-maturity - Estimated fair values for investment securities are based on quoted market prices where available. If quoted market prices are not available, then fair values are estimated by using pricing models that use observable inputs or quoted prices of securities with similar characteristics. Loans - The fair value of Pinnacle Financial's loan portfolio includes a credit risk factor in the determination of the fair value of its loans. This credit risk assumption is intended to approximate the fair value that a market participant would realize in a hypothetical orderly transaction. Pinnacle Financial's loan portfolio is initially fair valued using a segmented approach. Pinnacle Financial divides its loan portfolio into the following categories: variable rate loans, impaired loans and all other loans. The results are then adjusted to account for credit risk. The values derived from the discounted cash flow approach for our performing loan portfolio incorporate credit risk to determine the exit price. Fair values for impaired loans are estimated using discounted cash flow models or are based on the fair value of the underlying collateral. Purchased loans, including loans acquired through a merger, are initially recorded at fair value on the date of purchase. Purchased loans that contain evidence of post-origination credit deterioration as of the purchase date are carried at the net present value of expected future cash flows. All other purchased loans are recorded at their initial fair value, and adjusted for subsequent advances, pay downs, amortization or accretion of any fair value premium or discount on purchase, charge-offs and any other adjustment to carrying value. Loans held-for-sale - Loans held-for-sale are carried at the lower of cost or fair value. The estimate of fair value is based on pricing models and other information. Deposits, securities sold under agreements to repurchase, Federal Home Loan Bank (FHLB) advances, subordinated debt and other borrowings - The fair value of demand deposits, savings deposits and securities sold under agreements to repurchase are derived from a selection of market transactions reflecting our peer group. Fair values for certificates of deposit, FHLB advances and subordinated debt are estimated using discounted cash flow models, using current market interest rates offered on certificates, advances and other borrowings with similar remaining maturities. Off-balance sheet instruments - The fair values of Pinnacle Financial's off-balance-sheet financial instruments are based on fees charged to enter into similar agreements. However, commitments to extend credit do not represent a significant value to Pinnacle Financial until such commitments are funded. The following table presents the carrying amounts, estimated fair value and placement in the fair value hierarchy of Pinnacle Financial's financial instruments at September 30, 2018 and December 31, 2017 . This table excludes financial instruments for which the carrying amount approximates fair value. For short-term financial assets such as cash and cash equivalents, the carrying amount is a reasonable estimate of fair value due to the relatively short time between the origination of the instrument and its expected realization. For financial liabilities such as non-interest bearing demand, interest-bearing demand, and savings deposits, the carrying amount is a reasonable estimate of fair value due to these products having no stated maturity (in thousands): September 30, 2018 Carrying/ Notional Amount Estimated Fair Value (1) Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) Financial assets: Securities held-to-maturity $ 194,997 $ 192,500 $ — $ 192,500 $ — Loans, net 17,384,024 17,201,694 — — 17,201,694 Consumer loans held-for-sale 47,417 47,957 — 47,957 — Commercial loans held-for-sale 11,402 11,532 — 11,532 — Financial liabilities: Deposits and securities sold under agreements to repurchase 18,537,732 17,935,256 — — 17,935,256 Federal Home Loan Bank advances 1,520,603 1,481,374 — — 1,481,374 Subordinated debt and other borrowings 465,487 439,369 — — 439,369 Off-balance sheet instruments: Commitments to extend credit (2) 6,455,039 1,673 — — 1,673 Standby letters of credit (3) 177,796 1,191 — — 1,191 December 31, 2017 Financial assets: Securities held-to-maturity $ 20,762 $ 20,830 $ — $ 20,830 $ — Loans, net 15,565,876 15,252,953 — — 15,252,953 Consumer loans held-for-sale 103,729 104,986 — 104,986 — Commercial loans held-for-sale 25,456 25,761 — 25,761 — Financial liabilities: Deposits and securities sold under agreements to repurchase 16,586,964 16,516,342 — — 16,516,342 Federal Home Loan Bank advances 1,319,909 1,313,311 — — 1,313,311 Subordinated debt and other borrowings 465,505 445,098 — — 445,098 Off-balance sheet instruments: Commitments to extend credit (2) 5,788,425 2,264 — — 2,264 Standby letters of credit (3) 143,684 800 — — 800 (1) Estimated fair values are consistent with an exit-price concept. The assumptions used to estimate the fair values are intended to approximate those that a market-participant would realize in a hypothetical orderly transaction. (2) At the end of each quarter, Pinnacle Financial evaluates the inherent risks of the outstanding off-balance sheet commitments. In making this evaluation, Pinnacle Financial evaluates the credit worthiness of the borrower, the collateral supporting the commitments and any other factors similar to those used to evaluate the inherent risks of our loan portfolio. Additionally, Pinnacle Financial evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at September 30, 2018 and December 31, 2017 , Pinnacle Financial included in other liabilities $1.7 million and $2.3 million, respectively, representing the inherent risks associated with these off-balance sheet commitments. (3) At September 30, 2018 and December 31, 2017 , the aggregate fair value of Pinnacle Financial's standby letters of credit was $1.2 million and $ 800,000 , respectively. These amounts represent the unamortized fee associated with these standby letters of credit and are included in the consolidated balance sheets of Pinnacle Financial and are believed to approximate fair value. These fair values will decrease over time as the existing standby letters of credit approach their expiration dates.

Regulatory Matters

Regulatory Matters	9 Months Ended
Regulatory Matters	Sep. 30, 2018
Regulatory Capital Requirements [Abstract]
Regulatory Matters	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. During the nine months ended September 30, 2018 , Pinnacle Bank paid $66.0 million in dividends to Pinnacle Financial. Since the first quarter of 2016, Pinnacle Financial has paid a quarterly common stock dividend of $0.14 per share. On October 16, 2018, Pinnacle's Board of Director's increased it's quarterly cash dividend to $0.16. The amount and timing of all future dividend payments by Pinnacle Financial, if any, is subject to discretion of Pinnacle Financial's board of directors and will depend on Pinnacle Financial's earnings, capital position, financial condition and other factors, including then applicable regulatory capital requirements, as they become known to Pinnacle Financial and Pinnacle Bank's ability to pay dividends to Pinnacle Financial. Pinnacle Financial and Pinnacle Bank are subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on the financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, Pinnacle Financial and Pinnacle Bank must meet specific capital guidelines that involve quantitative measures of the assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. Pinnacle Financial's and Pinnacle Bank's capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require Pinnacle Financial and its banking subsidiary to maintain minimum amounts and ratios of common equity Tier 1 capital to risk-weighted assets, Tier 1 capital to risk-weighted assets, total risk-based capital to risk-weighted assets and Tier 1 capital to average assets. The final rules implementing the Basel Committee on Banking Supervision's capital guidelines for U.S. banks (Basel III rules) became effective for Pinnacle Financial on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. The minimum capital level requirements applicable to bank holding companies and banks subject to the rules are: (i) a common equity Tier 1 capital ratio of 4.5% ; (ii) a Tier 1 risk-based capital ratio of 6% ; (iii) a total risk-based capital ratio of 8% ; and (iv) a Tier 1 leverage ratio of 4% for all institutions. The Basel III rules also establish a capital conservation buffer of 2.5% (to be phased in over three years) above the regulatory minimum risk-based capital ratios. The capital conservation buffer was phased in beginning in January 2016 at 0.625% and is increasing each year by a like percentage until fully implemented in January 2019. The net unrealized gain or loss on available-for-sale securities is not included in computing regulatory capital. Management believes, as of September 30, 2018 , 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 Financial and 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. Pinnacle Financial's and Pinnacle Bank's actual capital amounts and resulting ratios, not including the capital conservation buffer, are presented in the following table (in thousands): Actual Minimum Capital Requirement Minimum To Be Well-Capitalized Amount Ratio Amount Ratio Amount Ratio At September 30, 2018 Total capital to risk weighted assets: Pinnacle Financial $ 2,508,348 12.1 % $ 1,656,444 8.0 % NA NA Pinnacle Bank $ 2,344,597 11.4 % $ 1,650,616 8.0 % $ 2,063,269 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 1,955,095 9.4 % $ 1,242,333 6.0 % NA NA Pinnacle Bank $ 2,133,834 10.3 % $ 1,237,962 6.0 % $ 1,650,616 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 1,954,972 9.4 % $ 931,750 4.5 % NA NA Pinnacle Bank $ 2,133,711 10.3 % $ 928,471 4.5 % $ 1,341,125 6.5 % Tier 1 capital to average assets (): Pinnacle Financial $ 1,955,095 8.8 % $ 888,029 4.0 % NA NA Pinnacle Bank $ 2,133,834 9.6 % $ 885,345 4.0 % $ 1,106,681 5.0 % Actual Minimum Capital Requirement Minimum To Be Well-Capitalized Amount Ratio Amount Ratio Amount Ratio At December 31, 2017 Total capital to risk weighted assets: Pinnacle Financial $ 2,266,161 12.0 % $ 1,509,496 8.0 % NA NA Pinnacle Bank $ 2,134,344 11.3 % $ 1,504,765 8.0 % $ 1,880,956 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 1,725,323 9.1 % $ 1,132,122 6.0 % NA NA Pinnacle Bank $ 1,936,313 10.3 % $ 1,128,574 6.0 % $ 1,504,765 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 1,725,219 9.1 % $ 849,092 4.5 % NA NA Pinnacle Bank $ 1,936,209 10.3 % $ 846,430 4.5 % $ 1,222,621 6.5 % Tier 1 capital to average assets (): Pinnacle Financial $ 1,725,323 8.6 % $ 797,861 4.0 % NA NA Pinnacle Bank $ 1,936,313 9.7 % $ 796,235 4.0 % $ 995,294 5.0 % (*) Average assets for the above calculations were based on the most recent quarter.

Subordinated Debt and Other bor

Subordinated Debt and Other borrowings	9 Months Ended
Subordinated Debt and Other borrowings	Sep. 30, 2018
Subordinated Debt [Abstract]
Subordinated Debt and Other borrowings	Subordinated Debt and Other borrowings Pinnacle Financial has twelve wholly-owned subsidiaries that are statutory business trusts created for the exclusive purpose of issuing 30 -year capital trust preferred securities. Additionally, Pinnacle Financial or Pinnacle Bank has entered into certain other subordinated debt agreements and a revolving credit facility as outlined below and, with respect to the legacy Pinnacle Financial indebtedness, as fully described in the 2017 Form 10-K (in thousands): Name Date Maturity Total Debt Outstanding Interest Rate at Coupon Structure Trust preferred securities Pinnacle Statutory Trust I December 29, 2003 December 30, 2033 $ 10,310 5.13 % 30-day LIBOR + 2.80% Pinnacle Statutory Trust II September 15, 2005 September 30, 2035 20,619 3.80 % 30-day LIBOR + 1.40% Pinnacle Statutory Trust III September 7, 2006 September 30, 2036 20,619 4.05 % 30-day LIBOR + 1.65% Pinnacle Statutory Trust IV October 31, 2007 September 30, 2037 30,928 5.18 % 30-day LIBOR + 2.85% BNC Capital Trust I April 3, 2003 April 15, 2033 5,155 5.59 % 30-day LIBOR + 3.25% BNC Capital Trust II March 11, 2004 April 7, 2034 6,186 5.19 % 30-day LIBOR + 2.85% BNC Capital Trust III September 23, 2004 September 23, 2034 5,155 4.74 % 30-day LIBOR + 2.40% BNC Capital Trust IV September 27, 2006 December 31, 2036 7,217 4.10 % 30-day LIBOR + 1.70% Valley Financial Trust I June 26, 2003 June 26, 2033 4,124 5.47 % 30-day LIBOR + 3.10% Valley Financial Trust II September 26, 2005 December 15, 2035 7,217 3.82 % 30-day LIBOR + 1.49% Valley Financial Trust III December 15, 2006 January 30, 2037 5,155 4.07 % 30-day LIBOR + 1.73% Southcoast Capital Trust III August 5, 2005 September 30, 2035 10,310 3.90 % 30-day LIBOR + 1.50% Subordinated Debt Pinnacle Bank Subordinated Notes July 30, 2015 July 30, 2025 60,000 4.88 % Fixed (1) Pinnacle Bank Subordinated Notes March 10, 2016 July 30, 2025 70,000 4.88 % Fixed (1) Avenue Subordinated Notes December 29, 2014 December 29, 2024 20,000 6.75 % Fixed (2) Pinnacle Financial Subordinated Notes November 16, 2016 November 16, 2026 120,000 5.25 % Fixed (3) BNC Subordinated Notes September 25, 2014 October 1, 2024 60,000 5.50 % Fixed (4) BNC Subordinated Note October 15, 2013 October 15, 2023 10,410 7.08 % 30-day LIBOR + 5.50% (5) Other Borrowings Revolving credit facility (6) April 26, 2018 April 25, 2019 — — 30-day LIBOR + 1.75% Debt issuance costs and fair value adjustments (7,918 ) Total subordinated debt and other borrowings $ 465,487 ______________________ (1) Migrates to three month LIBOR + 3.128% beginning July 30, 2020 through the end of the term. (2) Migrates to three month LIBOR + 4.95% beginning January 1, 2020 through the end of the term. (3) Migrates to three month LIBOR + 3.884% beginning November 16, 2021 through the end of the term. (4) Migrates to three month LIBOR + 3.59% beginning October 1, 2019 through the end of the term if not redeemed on that date. (5) Coupon structure includes a floor of 5.5% and a cap of 9.5% . (6) Borrowing capacity on the revolving credit facility is $75.0 million . At September 30, 2018 , there was no outstanding balance under this facility. An unused fee of 0.35% is assessed on the average daily unused amount of the loan.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2018
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, 2017 (2017 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 12. Subordinated Debt and Other Borrowings are included in these consolidated financial statements pursuant to the equity method of accounting. Significant intercompany transactions and accounts are eliminated in consolidation.
Use of Estimates	Use of Estimates — The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term include the determination of the allowance for loan losses, determination of any impairment of intangible assets and the valuation of deferred tax assets. There have been no significant changes to Pinnacle Financial's significant accounting policies as disclosed in the 2017 10-K.
Income Per Common Share	Income Per Common Share — Basic net income per common share (EPS) is computed by dividing net income by the weighted average common shares outstanding for the period. Diluted EPS reflects the dilution that could occur if securities or other contracts to issue common stock were exercised or converted. The difference between basic and diluted weighted average shares outstanding is attributable to common stock options, common stock appreciation rights, restricted share awards, and restricted share unit awards. The dilutive effect of outstanding options, common stock appreciation rights, restricted share awards, and restricted share unit awards is reflected in diluted EPS by application of the treasury stock method. The following is a summary of the basic and diluted net income per share calculations for the three and nine months ended September 30, 2018 and 2017 (in thousands, except per share data): Three months ended Nine months ended 2018 2017 2018 2017 Basic net income per share calculation: Numerator - Net income $ 93,747 $ 64,442 $ 264,122 $ 147,181 Denominator - Weighted average common shares outstanding 77,145 76,679 77,116 59,371 Basic net income per common share $ 1.22 $ 0.84 $ 3.42 $ 2.48 Diluted net income per share calculation: Numerator – Net income $ 93,747 $ 64,442 $ 264,122 $ 147,181 Denominator - Weighted average common shares outstanding 77,145 76,679 77,116 59,371 Dilutive shares contingently issuable 346 554 326 539 Weighted average diluted common shares outstanding 77,491 77,232 77,443 59,910 Diluted net income per common share $ 1.21 $ 0.83 $ 3.41 $ 2.46
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements — In August 2017, the FASB issued Accounting Standards Update No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities . The amendments in this ASU make more financial and non-financial hedging strategies eligible for hedge accounting. It also amends the presentation and disclosure requirements and changes how companies assess effectiveness. The amendments will be effective for public companies for interim and annual periods beginning after December 15, 2018. Early adoption is permitted. Pinnacle Financial early adopted this standard in the first quarter of 2018 and subsequently entered into three hedging transactions during the nine months ended September 30, 2018, all of which are eligible for hedge accounting as a result of the new standard, as noted in Note 9. Derivative Instruments . In March 2017, the FASB issued Accounting Standards Update No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities . The amendment in this ASU shortens the amortization period for certain callable debt securities held at a premium to the earliest call date. The amendment does not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendment is effective for fiscal years beginning after December 15, 2018, including interim periods within those periods. Early adoption is permitted with modified retrospective application. Pinnacle Financial elected to early adopt this standard in the first quarter of 2018 and it continues to have no material impact to its consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . The amendment in this ASU clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendment is effective for fiscal years beginning after December 15, 2017, including interim periods within those periods. There has been no material impact on Pinnacle Financial's consolidated financial statements due to the adoption of this standard in the first quarter of 2018. In August 2016, the FASB issued Accounting Standards Update 2016-15, Statement of Cash Flows (Topic 230) intended to reduce the diversity in practice around how certain transactions are classified within the statement of cash flows. The guidance became effective for public companies for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Pinnacle Financial adopted this standard in the first quarter of 2018 and it continues to have no material impact to its consolidated financial statements, with the exception of dividends received from its and Pinnacle Bank's equity method investments which were reclassified from cash flow from investments to operating cash flow. In January 2016, the FASB issued Accounting Standards Update 2016-01, Financial Instruments – Overall (Subtopic 825-10) which, among other things, (i) requires equity investments, excluding those accounted for under the equity method or that result in consolidation, to be measured at fair value with changes in fair value recognized in net income, (ii) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (iii) eliminates the requirement for public business entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (iv) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (v) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (vi) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (viii) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity's other deferred tax assets. ASU 2016-01 became effective for Pinnacle Financial in the first quarter of 2018 and continues to have no material impact on its consolidated financial statements. See Note 10. Fair Value of Financial Instruments for disclosure of the fair value of financial instruments based on an exit price notion as required by ASU 2016-01. In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606 ), which was developed as a joint project with the International Accounting Standards Board to remove inconsistencies in revenue requirements and provide a more robust framework for addressing revenue issues. The ASU's core principle is that an entity should recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which an entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB issued Accounting Standards Update 2015-14 , which deferred the effective date by one year (i.e., interim and annual reporting periods beginning after December 15, 2017). Pinnacle Financial adopted the ASU during the first quarter of 2018, as required, using a modified retrospective approach. The majority of Pinnacle Financial's revenue stream is generated from interest income on loans and securities, which are outside the scope of Topic 606. Pinnacle Financial’s sources of income that fall within the scope of Topic 606 include service charges on deposits, investment services, insurance sales commissions, trust fees, interchange fees and gains and losses on sales of other real estate, all of which are presented within noninterest income. Pinnacle Financial has evaluated the effect of Topic 606 on these fee-based income streams and concluded that adoption of the standard did not materially impact its financial statements. The following is a summary of the implementation considerations for the revenue streams that fall within the scope of Topic 606: • Service charges on deposits, investment services, trust fees and interchange fees — Fees from these services are either transaction based, for which the performance obligations are satisfied when the individual transaction is processed, or set periodic service charges, for which the performance obligations are satisfied over the period the service is provided. Transaction-based fees are recognized at the time the transaction is processed, and periodic service charges are recognized over the service period. The adoption of Topic 606 had no impact on Pinnacle Financial's revenue recognition practice for these services. • Insurance sales commissions — Insurance commissions are received from insurance companies in return for the placement of policies with customers. While additional services, such as claims assistance, may be provided over the term of the policy, the revenues are substantially earned at the time of policy placement. The only contingency in earning the revenue relates to the potential for subsequent cancellation of policies. Accordingly, revenue is recognized at the time of policy placement, net of an allowance for estimated policy cancellations. The adoption of Topic 606 had no impact on Pinnacle Financial's revenue recognition related to insurance sales commissions. • Gains on sales of other real estate — ASU 2014-09 also creates Topic 610-20, under which a gain on sale should be recognized when a contract for sale exists and control of the asset has been transferred to the buyer. Topic 606 lists several criteria which must exist to conclude that a contract for sale exists, including a determination that the institution will collect substantially all of the consideration to which it is entitled. This presents a key difference between the prior and new guidance related to the recognition of the gain when the institution finances the sale of the property. Rather than basing recognition on the amount of the buyer's initial investment, which was the primary consideration under prior guidance, the analysis is now based on various factors including not only the loan to value ratio, but also the credit quality of the borrower, the structure of the loan, and any other factors that may affect collectability. While these differences may affect the decision to recognize or defer gains on sales of other real estate in circumstances where Pinnacle Bank has financed the sale, the effects would not be material to Pinnacle Financial's consolidated financial statements.
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	Recently Issued Accounting Pronouncements, not yet adopted — In August 2018, the FASB issued Accounting Standards Update 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract . ASU 2018-15 requires implementation costs incurred by customers in cloud computing arrangements (i.e., hosting arrangements) to be capitalized under the same premises of authoritative guidance for internal-use software, and deferred over the noncancellable term of the cloud computing arrangements plus any option renewal periods that are reasonably certain to be exercised by the customer or for which the exercise is controlled by the service provider. This update is effective for fiscal years beginning after December 15, 2019, including interim periods within those periods. Early adoption is permitted. If this standard had been effective as of the date of the financial statements included in this report, there would have been no impact on Pinnacle Financial's consolidated financial statements. In August 2018, the FASB issued Accounting Standards Update 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurements. This update is part of the disclosure framework project and eliminates certain disclosure requirements for fair value measurements, requires entities to disclose new information, and modifies existing disclosure requirements. The new disclosure guidance is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted. Pinnacle Financial is currently evaluating the impact this change will have on its consolidated financial statements and disclosures. In February 2018, the FASB issued Accounting Standards Update 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this ASU addressed the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the newly enacted federal corporate tax rate included in the Tax Cuts and Jobs Act issued December 22, 2017. These amendments allow an entity to make a reclassification from other comprehensive income to retained earnings for the difference between the historical corporate income tax rate and the newly enacted corporate income tax rate. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those years. Early adoption is permitted with retrospective application. This standard will not have a material impact on Pinnacle Financial's consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update No. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment to simplify how entities other than private companies, such as public business entities and not-for-profit entities, are required to test goodwill for impairment by eliminating the comparison of the implied fair value of the reporting unit's goodwill with the carrying amount of that goodwill. The amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those periods. If this standard had been effective as of the date of the financial statements included in this report, there would have been no impact on Pinnacle Financial's consolidated financial statements. In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases which requires recognition in the statement of financial position of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The guidance requires that a lessee should recognize lease assets and lease liabilities as compared to previous GAAP that did not require lease assets and lease liabilities to be recognized for operating leases. The guidance becomes effective for Pinnacle Financial on January 1, 2019. Had this standard been effective as of September 30, 2018, we would have recorded a right of use asset and lease liability of approximately $70 million. In July 2016, the FASB issued Accounting Standards Update 2018-10, Codification Improvements to Topic 842, Leases which provides technical corrections and improvements to ASU 2016-02. It is not anticipated that this update will have an impact on our adoption of ASU 2016-02. Also in July 2016, the FASB issued Accounting Standards Update 2018-11, Leases (Topic 842): Targeted Improvements which provides an optional transition method to adopt the new requirements of ASU 2016-02 as of the adoption date with no adjustment to the presentation or disclosure of comparative prior periods included in the financial statements in the period of adoption. Pinnacle Financial intends to elect the optional transition method which will result in presentation of periods prior to adoption under the prior lease guidance of ASC Topic 840. In June 2016, the FASB issued Accounting Standards Update 2016-13 , Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments (CECL), which introduces the current expected credit losses methodology. Among other things, CECL requires the measurement of all expected credit losses for financial assets, including loans and held-to-maturity debt securities, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The new model will require institutions to calculate all probable and estimable losses that are expected to be incurred through the financial asset's entire life through a provision for credit losses, including loans obtained as a result of any acquisition not deemed to be purchased credit deteriorated (PCD). CECL also requires the allowance for credit losses for PCD loans to be determined in a manner similar to that of other financial assets measured at amortized cost; however, the initial allowance will be added to the purchase price rather than recorded as provision expense. The disclosure of credit quality indicators related to the amortized cost of financing receivables will be further disaggregated by year of origination (or vintage). Institutions are to apply the changes through a cumulative-effect adjustment to their retained earnings as of the beginning of the first reporting period in which the standard is effective. The amendments are effective for fiscal years beginning after December 15, 2019. Early application will be permitted for fiscal years beginning after December 15, 2018. Pinnacle Financial is currently assessing the impact of the new guidance on its consolidated financial statements. An increase in the overall allowance for loan losses is likely upon adoption in order to provide for expected credit losses over the life of the loan portfolio. Other than those pronouncements discussed above and those which have been recently adopted, we do not believe there were any other recently issued accounting pronouncements that are expected to materially impact Pinnacle Financial.
Subsequent Events	Subsequent Events — Accounting Standards Codification (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, 2018 through the date of the issued financial statements. Pinnacle Financial entered into multiple hedging transactions in October that have been more fully disclosed in Note 9. Derivative Instruments . Additionally, consistent with the investment policy, during the month of October, Pinnacle Financial sold $ 119.9 million in available-for-sale securities for net unrealized losses, net of tax, of $ 1.1 million. The net unrealized loss will be reclassified from accumulated other comprehensive income into net income. Other than the above-noted transaction, no other subsequent events were noted.
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill — ASC 350-35-3 provides an entity the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If an entity determines that this is the case, it is required to perform the quantitative two-step goodwill impairment test to identify potential goodwill impairment and measure the amount of goodwill impairment loss to be recognized. Based on the qualitative assessment, if an entity determines that the fair value of a reporting unit is more than its carrying amount, the quantitative two-step goodwill impairment test is not required. Pinnacle Financial performed its annual qualitative assessment as of September 30, 2018. As a result of this assessment, Pinnacle Financial believes that it is not more likely than not that the fair value of our entity is less than book value, and accordingly, the assessment indicates there is no impairment of goodwill as of September 30, 2018. As such, the additional two-step quantitative assessment was not required.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
Summary of Significant Accounting Policies (Tables)	Sep. 30, 2018
Accounting Policies [Abstract]
Supplemental Cash Flow Information	Cash Flow Information — Supplemental cash flow information addressing certain cash and noncash transactions for each of the nine months ended September 30, 2018 and September 30, 2017 was as follows (in thousands): For the nine months ended 2018 2017 Cash Transactions: Interest paid $ 136,154 $ 56,804 Income taxes paid, net 55,525 53,199 Noncash Transactions: Loans charged-off to the allowance for loan losses 22,316 16,308 Loans foreclosed upon and transferred to other real estate owned 2,066 3,573 Loans foreclosed upon and transferred to other assets 1,580 641 Other real estate sales financed 276 — Available-for-sale securities transferred to held-to-maturity portfolio 179,763 — Held-for-sale loans transferred to held-for-investment loan portfolio 44,980 — Common stock issued in connection with acquisition (1) — 1,858,133
Basic and Diluted Earnings Per Share Calculations	The following is a summary of the basic and diluted net income per share calculations for the three and nine months ended September 30, 2018 and 2017 (in thousands, except per share data): Three months ended Nine months ended 2018 2017 2018 2017 Basic net income per share calculation: Numerator - Net income $ 93,747 $ 64,442 $ 264,122 $ 147,181 Denominator - Weighted average common shares outstanding 77,145 76,679 77,116 59,371 Basic net income per common share $ 1.22 $ 0.84 $ 3.42 $ 2.48 Diluted net income per share calculation: Numerator – Net income $ 93,747 $ 64,442 $ 264,122 $ 147,181 Denominator - Weighted average common shares outstanding 77,145 76,679 77,116 59,371 Dilutive shares contingently issuable 346 554 326 539 Weighted average diluted common shares outstanding 77,491 77,232 77,443 59,910 Diluted net income per common share $ 1.21 $ 0.83 $ 3.41 $ 2.46

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
Acquisitions (Tables)	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Supplemental Pro-Forma Information		Supplemental Pro Forma Combined Results of Operations For the three months ended September 30, 2017, BNC was included in the operations of PNFP and, as such, no supplemental proforma information is necessary. The supplemental proforma information below for the nine months ended September 30, 2017 gives effect to the BNC acquisition as if it had occurred on January 1, 2017. These results combine the historical results of BNC into Pinnacle Financial's consolidated statement of income and, while certain adjustments were made for the estimated impact of certain fair value adjustments, they are not indicative of what would have occurred had the BNC Merger taken place on the indicated date nor are they intended to represent or be indicative of future results of operations. In particular, no adjustments have been made to eliminate the amount of BNC's provision for credit losses for the nine months ended September 30, 2017 that may not have been necessary had the acquired loans been recorded at fair value as of the beginning of 2017. Additionally, these financial statements were not adjusted for non-recurring expenses, such as merger-related expenses incurred by either Pinnacle Financial or BNC. Pinnacle Financial expects to achieve operating cost savings and other business synergies as a result of the acquisition which are also not reflected in the proforma amounts. (dollars in thousands) Nine Months Ended Revenue (1) $ 619,326 Income before income taxes 261,516 (1) Net interest income plus noninterest income.
BNC Bancorp
Business Acquisition [Line Items]
Consideration Paid and an Allocation of Purchase Price to Net Assets Acquired	The following summarizes the consideration paid and an allocation of purchase price to net assets acquired (in thousands): Number of Shares Amount Equity consideration: Common stock issued 27,687,100 $ 1,858,133 Total equity consideration $ 1,858,133 Non-equity consideration: Cash paid to redeem common stock $ 129 Total consideration paid $ 1,858,262 Allocation of total consideration paid: Fair value of net assets assumed including estimated identifiable intangible assets $ 602,689 Goodwill 1,255,573 $ 1,858,262
Purchase Price Allocations	As of June 16, 2017 BNC Historical Cost Basis Fair Value Adjustments (1) As Recorded by Pinnacle Financial Assets Cash and cash equivalents $ 155,271 $ — $ 155,271 Investment securities 643,875 1,667 645,542 Loans (2) 5,782,720 (181,430 ) 5,601,290 Mortgage loans held for sale 27,026 — 27,026 Other real estate owned (3) 20,143 1,382 21,525 Core deposit and other intangible (4) — 50,422 50,422 Property, plant and equipment (5) 156,805 (3,341 ) 153,464 Other assets (6) 320,988 54,057 375,045 Total Assets $ 7,106,828 $ (77,243 ) $ 7,029,585 Liabilities Interest-bearing deposits (7) $ 5,003,653 $ 4,355 $ 5,008,008 Non-interest bearing deposits 1,199,342 — 1,199,342 Borrowings (8) 183,389 (6,412 ) 176,977 Other liabilities (9) 35,729 6,840 42,569 Total Liabilities $ 6,422,113 $ 4,783 $ 6,426,896 Net Assets Acquired $ 684,715 $ (82,026 ) $ 602,689 Explanation of certain fair value adjustments: (1) The amount represents the adjustment of the book value of BNC's assets and liabilities to their estimated fair value on the date of acquisition. Fair value adjustments were updated subsequent to the merger date based on the results of finalized valuation assessments. (2) The amount represents the adjustment of the net book value of BNC's loans to their estimated fair value based on interest rates and expected cash flows as of the date of acquisition, which includes estimates of expected credit losses inherent in the portfolio of approximately 2.6% of the 3.1% mark on the acquired loan portfolio. (3) This adjustment reflects the Day 1 value of OREO properties. (4) The amount represents the fair value of the core deposit intangible asset representing the intangible value of the deposit base acquired and the fair value of the customer relationship intangible assets representing the intangible value of customer relationships acquired. (5) The amount represents the adjustment of the net book value of BNC's property, plant and equipment to estimated fair value based on market values of similar assets. (6) The amount represents the deferred tax asset recognized on the fair value adjustment of BNC's acquired assets and assumed liabilities and an adjustment to the Day 1 fair value of an alternative investment. (7) The amount represents the adjustment necessary because the weighted average interest rate of BNC's deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio. (8) The amount represents the combined adjustment necessary because the weighted average interest rate of BNC's subordinated debt issuance exceeded the cost of similar funding at the time of acquisition and because the weighted average interest rate of BNC's trust preferred securities issuances was lower than the cost of similar funding at the time of acquisition. The combined fair value adjustments will be amortized to increase future interest expense over the lives of the instruments. (9) The amount represents the adjustment to accrue obligations that existed but had not been recorded as of the acquisition date and the fair value of BNC lease obligations.

Equity method investment (Table

Equity method investment (Tables)	9 Months Ended
Equity method investment (Tables)	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	A summary of BHG's financial position as of September 30, 2018 and December 31, 2017 and results of operations as of and for the three and nine months ended September 30, 2018 and 2017 , were as follows (in thousands): As of September 30, 2018 December 31, 2017 Assets $ 436,693 $ 330,030 Liabilities 322,323 224,837 Membership interests 114,370 105,193 Total liabilities and membership interests $ 436,693 $ 330,030 For the three months ended For the nine months ended 2018 2017 2018 2017 Revenues $ 59,133 $ 41,997 $ 151,937 $ 113,244 Net income $ 30,933 $ 20,428 $ 69,039 $ 54,453

Securities (Tables)

Securities (Tables)	9 Months Ended
Securities (Tables)	Sep. 30, 2018
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, 2018 and December 31, 2017 are summarized as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2018: Securities available-for-sale: U.S. Treasury securities $ 30,573 $ — $ 45 $ 30,528 U.S. government agency securities 64,640 45 1,500 63,185 Mortgage-backed securities 1,334,640 3,268 43,363 1,294,545 State and municipal securities 1,240,136 1,995 29,860 1,212,271 Asset-backed securities 334,547 870 759 334,658 Corporate notes and other 69,738 617 960 69,395 $ 3,074,274 $ 6,795 $ 76,487 $ 3,004,582 Securities held-to-maturity: State and municipal securities $ 194,997 $ 9 $ 2,506 $ 192,500 $ 194,997 $ 9 $ 2,506 $ 192,500 December 31, 2017: Securities available-for-sale: U.S. Treasury securities $ 30,505 $ — $ 60 $ 30,445 U.S. government agency securities 182,500 67 1,766 180,801 Mortgage-backed securities 1,270,625 5,318 12,124 1,263,819 State and municipal securities 774,949 12,251 2,588 784,612 Asset-backed securities 173,346 262 316 173,292 Corporate notes and other 81,615 1,346 647 82,314 $ 2,513,540 $ 19,244 17,501 $ 2,515,283 Securities held-to-maturity: State and municipal securities $ 20,762 $ 114 $ 46 $ 20,830 $ 20,762 $ 114 $ 46 $ 20,830
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of debt securities as of September 30, 2018 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, 2018: Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 34,856 $ 34,802 $ 315 $ 316 Due in one year to five years 77,055 77,059 6,066 6,044 Due in five years to ten years 159,471 157,274 7,997 7,875 Due after ten years 1,133,705 1,106,244 180,619 178,265 Mortgage-backed securities 1,334,640 1,294,545 — — Asset-backed securities 334,547 334,658 — — $ 3,074,274 $ 3,004,582 $ 194,997 $ 192,500
Classification of Investments According to Term of Unrealized Losses of Less than Twelve Months or Twelve Months or Longer	At September 30, 2018 and December 31, 2017 , the following investments had unrealized losses. The table below classifies these investments according to the term of the unrealized losses of less than twelve months or twelve months or longer (in thousands): Investments with an Unrealized Loss of less than 12 months Investments with an Unrealized Loss of 12 months or longer Total Investments with an Unrealized Loss Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses At September 30, 2018 U.S. Treasury securities $ 30,284 $ 39 $ 244 $ 6 $ 30,528 $ 45 U.S. government agency securities 13,605 360 45,118 1,140 58,723 1,500 Mortgage-backed securities 289,149 5,951 807,418 37,412 1,096,567 43,363 State and municipal securities 1,144,600 29,599 108,653 5,663 1,253,253 35,262 Asset-backed securities 204,638 741 4,505 18 209,143 759 Corporate notes 22,329 260 18,681 700 41,010 960 Total temporarily-impaired securities $ 1,704,605 $ 36,950 $ 984,619 $ 44,939 $ 2,689,224 $ 81,889 At December 31, 2017 U.S. Treasury securities $ 29,948 $ 60 $ — $ — $ 29,948 $ 60 U.S. government agency securities 173,677 1,766 — — 173,677 1,766 Mortgage-backed securities 607,408 5,042 285,561 7,082 892,969 12,124 State and municipal securities 115,403 1,408 50,083 1,226 165,486 2,634 Asset-backed securities 68,742 198 14,136 118 82,878 316 Corporate notes 22,168 547 11,944 100 34,112 647 Total temporarily-impaired securities $ 1,017,346 $ 9,021 $ 361,724 $ 8,526 $ 1,379,070 $ 17,547

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
Loans and Allowance for Loan Losses (Tables)	Sep. 30, 2018
Receivables [Abstract]
Loan Classification Categorized by Risk Rating Category	The following table outlines the amount of each loan classification categorized into each risk rating category as of September 30, 2018 and December 31, 2017 (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Total September 30, 2018 Pass $ 7,058,133 $ 2,766,126 $ 2,046,299 $ 4,866,409 $ 366,723 $ 17,103,690 Special Mention 30,291 10,534 3,002 31,213 724 75,764 Substandard (1) 96,729 13,234 6,313 90,345 66 206,687 Substandard-nonaccrual 29,966 25,266 3,395 18,280 961 77,868 Doubtful-nonaccrual — — — — — — Total loans $ 7,215,119 $ 2,815,160 $ 2,059,009 $ 5,006,247 $ 368,474 $ 17,464,009 December 31, 2017 Pass $ 6,487,368 $ 2,503,688 $ 1,880,704 $ 4,014,656 $ 351,359 $ 15,237,775 Special Mention 94,134 18,356 8,148 46,898 1,177 168,713 Substandard (1) 72,044 21,053 13,468 62,529 79 169,173 Substandard-nonaccrual 16,064 18,117 5,968 17,258 48 57,455 Doubtful-nonaccrual — — — — — — Total loans $ 6,669,610 $ 2,561,214 $ 1,908,288 $ 4,141,341 $ 352,663 $ 15,633,116 (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 the impact of nonaccrual loans and troubled debt restructurings. Potential problem loans, which are not included in nonaccrual loans, amounted to approximately $202.5 million at September 30, 2018 , compared to $164.0 million at December 31, 2017 .
Purchase Credit Impaired Loans	Loans acquired with deteriorated credit quality are recorded pursuant to the provisions of ASC 310-30, and are referred to as purchase credit impaired loans. The following table provides a rollforward of purchase credit impaired loans from December 31, 2017 through September 30, 2018 (in thousands): Gross Carrying Value Accretable Yield Nonaccretable Yield Net Carrying Value December 31, 2017 $ 74,324 $ (132 ) $ (31,537 ) $ 42,655 Year-to-date settlements (21,332 ) 21 12,262 (9,049 ) September 30, 2018 $ 52,992 $ (111 ) $ (19,275 ) $ 33,606
Summary of Recorded Investment, Unpaid Principal Balance and Related Allowance and Average Recorded Investment of Impaired Loans	at September 30, 2018 and December 31, 2017 by loan classification (in thousands): At September 30, 2018 At December 31, 2017 Recorded investment Unpaid principal balances Related allowance Recorded investment Unpaid principal balances Related allowance Impaired loans with an allowance: Commercial real estate – mortgage $ 10,282 $ 10,305 $ 461 $ 1,850 $ 1,863 $ 95 Consumer real estate – mortgage 15,746 15,808 490 8,028 8,079 410 Construction and land development 563 564 15 2,522 2,528 66 Commercial and industrial 8,908 8,939 1,265 12,521 12,644 1,627 Consumer and other 961 980 147 — — — Total $ 36,460 $ 36,596 $ 2,378 $ 24,921 $ 25,114 $ 2,198 Impaired loans without an allowance: Commercial real estate – mortgage $ 21,457 $ 21,481 $ — $ 16,364 $ 16,514 $ — Consumer real estate – mortgage 6,382 6,419 — 4,144 4,174 — Construction and land development 2,884 2,883 — 2,645 2,650 — Commercial and industrial 16,678 16,662 — 10,905 10,902 — Consumer and other — — — — — — Total $ 47,401 $ 47,445 $ — $ 34,058 $ 34,240 $ — Total impaired loans $ 83,861 $ 84,041 $ 2,378 $ 58,979 $ 59,354 $ 2,198 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, 2018 and 2017 , respectively, of impaired loans by loan classification (in thousands): For the three months ended For the nine months ended 2018 2017 2018 2017 Average recorded investment Interest income recognized Average recorded investment Interest income recognized Average recorded investment Interest income recognized Average recorded investment Interest income recognized Impaired loans with an allowance: Commercial real estate – mortgage $ 13,474 $ — $ 264 $ — $ 9,297 $ — $ 350 $ — Consumer real estate – mortgage 14,162 — 4,593 — 11,476 — 4,230 — Construction and land development 1,150 — 81 — 1,301 — 78 — Commercial and industrial 7,470 — 12,235 — 9,345 — 10,068 — Consumer and other 912 — 362 — 651 — 532 — Total $ 37,168 $ — $ 17,535 $ — $ 32,070 $ — $ 15,258 $ — Impaired loans without an allowance: Commercial real estate – mortgage $ 22,029 $ — $ 6,981 $ — $ 18,702 $ — $ 4,638 $ — Consumer real estate – mortgage 5,699 — 7,003 — 5,034 — 6,122 — Construction and land development 1,442 — 1,324 — 1,382 — 1,702 65 Commercial and industrial 16,008 — 6,673 — 16,096 — 8,573 — Consumer and other — — — — — — — — Total $ 45,178 $ — $ 21,981 $ — $ 41,214 $ — $ 21,035 $ 65 Total impaired loans $ 82,346 $ — $ 39,516 $ — $ 73,284 $ — $ 36,293 $ 65
Amount of Troubled Debt Restructuring Categorized by Loan Classification	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, 2018 and 2017 (dollars in thousands): Three months ended Nine months ended 2018 Number of contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, net of related allowance Number of contracts Pre Modification Outstanding Recorded Investment Post Modification Outstanding Recorded Investment, net of related allowance Commercial real estate – mortgage — $ — $ — — $ — $ — Consumer real estate – mortgage 1 169 169 2 206 206 Construction and land development 1 348 348 1 348 348 Commercial and industrial — — — — — — Consumer and other — — — — — — 2 $ 517 $ 517 3 $ 554 $ 554 2017 Commercial real estate – mortgage — $ — $ — — $ — $ — Consumer real estate – mortgage — — — 1 7 5 Construction and land development — — — — — — Commercial and industrial 1 501 145 3 2,472 1,773 Consumer and other — — — — — — 1 $ 501 $ 145 4 $ 2,479 $ 1,778
Summary of Loan Portfolio Credit Risk Exposure	Pinnacle Financial utilizes broadly accepted industry classification systems in order to classify borrowers into various industry classifications. Pinnacle Financial has a credit exposure (loans outstanding plus unfunded lines of credit) exceeding 25% of Pinnacle Bank's total risk-based capital to borrowers in the following industries at September 30, 2018 with the comparative exposures for December 31, 2017 (in thousands): September 30, 2018 Outstanding Principal Balances Unfunded Commitments Total exposure Total Exposure at December 31, Lessors of nonresidential buildings $ 3,146,798 $ 692,316 $ 3,839,114 $ 3,483,597 Lessors of residential buildings 983,084 269,344 1,252,428 1,151,676 Hotels (except Casino Hotels) and Motels 760,355 157,315 917,670 836,320 New Housing For-Sale Builders 459,501 567,914 1,027,415 780,137
Past Due Balances by Loan Classification	The table below presents past due balances by loan classification and segment at September 30, 2018 and December 31, 2017 , allocated between accruing and nonaccrual status (in thousands): Accruing Nonaccruing September 30, 2018 30-89 days past due and accruing 90 days or more past due and accruing Total past due and accruing Current and accruing Purchase credit impaired Nonaccrual (1) Nonaccruing purchase credit impaired Total loans Commercial real estate: Owner-occupied $ 7,756 $ — $ 7,756 $ 2,656,228 $ 2,769 $ 19,738 $ 1,754 $ 2,688,245 All other 2,633 — 2,633 4,504,385 11,382 5,591 2,883 4,526,874 Consumer real estate – mortgage 13,358 — 13,358 2,772,801 3,735 19,165 6,101 2,815,160 Construction and land development 3,368 — 3,368 2,049,468 2,778 2,024 1,371 2,059,009 Commercial and industrial 10,741 1,128 11,869 4,975,290 808 18,256 24 5,006,247 Consumer and other 4,361 645 5,006 362,507 — 961 — 368,474 Total $ 42,217 $ 1,773 $ 43,990 $ 17,320,679 $ 21,472 $ 65,735 $ 12,133 $ 17,464,009 Accruing Nonaccruing December 31, 2017 30-89 days past due and accruing 90 days or more past due and accruing Total past due and accruing Current and accruing Purchase credit impaired Nonaccrual (1) Nonaccruing purchase credit impaired Total loans Commercial real estate: Owner-occupied $ 6,772 $ 104 $ 6,876 $ 2,435,819 $ 4,820 $ 11,395 $ 1,105 $ 2,460,015 All other 16,559 — 16,559 4,177,454 12,018 704 2,860 4,209,595 Consumer real estate – mortgage 14,835 1,265 16,100 2,521,748 5,249 9,320 8,797 2,561,214 Construction and land development 4,136 146 4,282 1,894,560 3,478 2,878 3,090 1,908,288 Commercial and industrial 7,406 1,348 8,754 4,114,127 1,154 17,222 84 4,141,341 Consumer and other 6,311 1,276 7,587 345,076 — — — 352,663 Total $ 56,019 $ 4,139 $ 60,158 $ 15,488,784 $ 26,719 $ 41,519 $ 15,936 $ 15,633,116 (1) Approximately $54.6 million and $45.8 million of nonaccrual loans as of September 30, 2018 and December 31, 2017 , respectively, were performing pursuant to their contractual terms at those dates .
Details of Changes in the Allowance for Loan Losses	The following table details the changes in the allowance for loan losses for the three and nine months ended September 30, 2018 and 2017 , respectively, by loan classification (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total Three months ended September 30, 2018: Balance at June 30, 2018 $ 24,848 $ 5,853 $ 10,984 $ 28,338 $ 5,172 $ 475 $ 75,670 Charged-off loans (1,968 ) (262 ) (24 ) (3,336 ) (1,359 ) — (6,949 ) Recovery of previously charged-off loans 63 987 70 1,037 382 — 2,539 Provision for loan losses 3,574 149 (48 ) 4,085 618 347 8,725 Balance at September 30, 2018 $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 Three months ended September 30, 2017: Balance at June 30, 2017 $ 16,002 $ 7,835 $ 5,126 $ 24,235 $ 7,549 $ 1,197 $ 61,944 Charged-off loans (572 ) (395 ) (99 ) (1,625 ) (3,296 ) — (5,987 ) Recovery of previously charged-off loans 169 565 716 562 270 — 2,282 Provision for loan losses 5,191 (2,702 ) 1,780 235 2,396 20 6,920 Balance at September 30, 2017 $ 20,790 $ 5,303 $ 7,523 $ 23,407 $ 6,919 $ 1,217 $ 65,159 Nine months ended September 30, 2018: Balance at December 31, 2017 $ 21,188 $ 5,031 $ 8,962 $ 24,863 $ 5,874 $ 1,322 $ 67,240 Charged-off loans (2,930 ) (1,533 ) (36 ) (7,600 ) (10,217 ) — (22,316 ) Recovery of previously charged-off loans 1,517 2,190 1,645 2,492 2,159 — 10,003 Provision for loan losses 6,742 1,039 411 10,369 6,997 (500 ) 25,058 Balance at September 30, 2018 $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 Nine months ended September 30, 2017: Balance at December 31, 2016 $ 13,655 $ 6,564 $ 3,624 $ 24,743 $ 9,520 $ 874 $ 58,980 Charged-off loans (581 ) (663 ) (99 ) (3,278 ) (11,687 ) — (16,308 ) Recovery of previously charged-off loans 184 1,147 845 1,264 1,663 — 5,103 Provision for loan losses 7,532 (1,745 ) 3,153 678 7,423 343 17,384 Balance at September 30, 2017 $ 20,790 $ 5,303 $ 7,523 $ 23,407 $ 6,919 $ 1,217 $ 65,159 The following table details the allowance for loan losses and recorded investment in loans by loan classification and by impairment evaluation method as of September 30, 2018 and December 31, 2017 , respectively (in thousands): Commercial real estate - mortgage Consumer real estate - mortgage Construction and land development Commercial and industrial Consumer and other Unallocated Total September 30, 2018 Allowance for Loan Losses: Collectively evaluated for impairment $ 26,047 $ 6,235 $ 10,967 $ 28,859 $ 4,666 $ 76,774 Individually evaluated for impairment 461 490 15 1,265 147 2,378 Loans acquired with deteriorated credit quality (1) 9 2 — — — 11 Total allowance for loan losses $ 26,517 $ 6,727 $ 10,982 $ 30,124 $ 4,813 $ 822 $ 79,985 Loans: Collectively evaluated for impairment $ 7,164,591 $ 2,783,196 $ 2,051,413 $ 4,979,829 $ 367,513 $ 17,346,542 Individually evaluated for impairment 31,739 22,128 3,447 25,586 961 83,861 Loans acquired with deteriorated credit quality 18,789 9,836 4,149 832 — 33,606 Total loans $ 7,215,119 $ 2,815,160 $ 2,059,009 $ 5,006,247 $ 368,474 $ 17,464,009 December 31, 2017 Allowance for Loan Losses: Collectively evaluated for impairment $ 20,753 $ 4,460 $ 8,879 $ 23,181 $ 5,874 $ 63,147 Individually evaluated for impairment 95 410 66 1,627 — 2,198 Loans acquired with deteriorated credit quality (1) 340 161 17 55 — 573 Total allowance for loan losses $ 21,188 $ 5,031 $ 8,962 $ 24,863 $ 5,874 $ 1,322 $ 67,240 Loans: Collectively evaluated for impairment $ 6,630,593 $ 2,534,996 $ 1,896,553 $ 4,116,677 $ 352,663 $ 15,531,482 Individually evaluated for impairment 18,214 12,172 5,167 23,426 — 58,979 Loans acquired with deteriorated credit quality 20,803 14,046 6,568 1,238 — 42,655 Total loans $ 6,669,610 $ 2,561,214 $ 1,908,288 $ 4,141,341 $ 352,663 $ 15,633,116 (1) Loans acquired with deteriorated credit quality are recorded at fair value at the time of acquisition. An allowance for loan losses is recorded resulting from subsequent credit deterioration.

Stock Options and Restricted _2

Stock Options and Restricted Shares (Tables)	9 Months Ended
Stock Options and Restricted Shares (Tables)	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option and Stock Appreciation Rights Activity	A summary of the stock option activity within the equity incentive plans during the nine months ended September 30, 2018 and information regarding expected vesting, contractual terms remaining, intrinsic values and other matters is as follows: Number Weighted-Average Exercise Price Weighted-Average Contractual Remaining Term (in years) Aggregate Intrinsic Value (000's) Outstanding at December 31, 2017 274,586 $ 21.40 3.06 $ 12,329 (1) Granted — Exercised (90,497 ) Forfeited — Outstanding at September 30, 2018 184,089 $ 22.67 3.54 $ 6,900 (2) Options exercisable at September 30, 2018 184,089 $ 22.67 3.54 $ 6,900 (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 $66.30 per common share at December 31, 2017 for the 274,586 options that were in-the-money at December 31, 2017 . (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 $60.15 per common share at September 30, 2018 for the 184,089 options that were in-the-money at September 30, 2018 .
Summary of Activity for Unvested Restricted Share Awards	A summary of activity for unvested restricted share awards for the nine months ended September 30, 2018 is as follows: Number Grant Date Weighted-Average Cost Unvested at December 31, 2017 936,135 $ 50.08 Shares awarded 160,638 Conversion of previously awarded restricted share units to restricted share awards 6,200 Restrictions lapsed and shares released to associates/directors (352,595 ) Shares forfeited (1) (25,547 ) Unvested at September 30, 2018 724,831 $ 55.77 (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, senior management and outside directors with a combination of time and, in the case of senior management, performance vesting criteria. The following table outlines restricted stock grants that were awarded, grouped by similar vesting criteria, during the nine months ended September 30, 2018 : Grant Year Group (1) Vesting Period in years Shares awarded Restrictions Lapsed and shares released to participants Shares Forfeited by participants (6) Shares Unvested Time Based Awards 2018 Associates (2) 3 - 5 127,789 224 2,783 124,782 2018 Associates (3) 3 - 5 16,777 — 500 16,277 Performance Based Awards 2018 Leadership team (4) 3 6,200 4,340 1,860 — Outside Director Awards (5) 2018 Outside directors 1 16,072 1,148 — 14,924 (1) Groups include employees (referred to as associates above), the leadership team which includes our named executive officers and other key senior leadership members, 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 and time-based vesting awards to Pinnacle Financial's executive officers, 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 issued to associates that were former associates of BNC pursuant to legacy BNC incentive plans assumed by Pinnacle Financial. (4) Reflects conversion of restricted share units issued in prior years to restricted share awards. The forfeiture restrictions on these restricted share awards lapse in separate equal installments should Pinnacle Financial achieve certain soundness targets over each year of the subsequent vesting period. See further details of these awards under the caption "Restricted Share Units" below. (5) 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, 2019 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. (6) These shares represent forfeitures resulting from recipients whose employment or board membership is terminated during the year-to-date period ended September 30, 2018 or for which the performance criteria applicable to the award are not achieved. Any dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination or will not be distributed from escrow, as applicable.
Summary of Restricted Share Unit awards	The following table details the restricted share unit awards outstanding at September 30, 2018 : Units Awarded Grant year Named Executive Officers (NEOs) (1) Leadership Team other than NEOs Applicable Performance Periods associated with each tranche (fiscal year) Service period per tranche (in years) Subsequent holding period per tranche (in years) Shares settled into RSAs as of period end (2) 2018 96,878-145,339 25,990 2018 2 3 N/A 2019 2 2 N/A 2020 2 1 N/A 2017 72,537-109,339 24,916 2017 2 3 N/A 2018 2 2 N/A 2019 2 1 N/A 2016 73,474-110,223 26,683 2016 2 3 N/A 2017 2 2 N/A 2018 2 1 N/A 2015 58,200-101,850 28,378 2015 2 3 N/A 2016 2 2 N/A 2017 2 1 N/A (1) The named executive officers are awarded a range of awards that may be earned based on attainment of goals between a target level of performance and a maximum level of performance. (2) Restricted share unit awards granted in 2018, 2017, 2016 and 2015 will be earned if certain performance targets (and service periods) are achieved. Additional forfeiture restrictions may thereafter lapse based on Pinnacle Financial's attainment of certain soundness thresholds in future periods and thereafter the unit awards will be settled in shares of Pinnacle Financial common stock.

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
Derivative Instruments (Tables)	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Interest Rate Swaps	A summary of Pinnacle Financial's interest rate swaps related to customers as of September 30, 2018 and December 31, 2017 is included in the following table (in thousands): September 30, 2018 December 31, 2017 Balance Sheet Location Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Interest rate swap agreements: Pay fixed / receive variable swaps Other assets $ 972,816 $ 24,592 $ 748,625 $ 13,771 Pay variable / receive fixed swaps Other liabilities 972,816 (28,436 ) 748,625 (13,866 ) Open trade equity Other assets — 3,707 — — Total $ 1,945,632 $ (137 ) $ 1,497,250 $ (95 ) Amount of Gain (Loss) Recognized in Income Location of Gain (Loss) Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Interest rate swap agreements Other noninterest income $ (8 ) $ 7 $ (42 ) $ 20
Schedule of Derivative Instruments	Derivatives designated as cash flow hedges For derivative instruments that are designated and qualify as a cash flow hedge, the aggregate fair value of the derivative instrument is recorded in other assets or other liabilities with any gain or loss related to changes in fair value recorded in accumulated other comprehensive income, net of tax. The gain or loss is reclassified into earnings in the same period during which the hedged asset or liability affects earnings and is presented in the same income statement line item as the earnings effect of the hedged asset or liability. Pinnacle Financial uses forward cash flow hedge relationships in an effort to manage future interest rate exposure. 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, 2018 and December 31, 2017 are as follows (in thousands): September 30, 2018 December 31, 2017 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Asset derivatives Interest rate swap agreements Other assets 2.51 2.61% 3 month LIBOR $ 134,000 $ 982 $ — $ — Liability derivatives Interest rate swap agreements Other assets 3.89 3.14% 3 month LIBOR $ 66,000 $ (311 ) $ 200,000 $ (4,583 ) 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, 2018 and 2017 were as follows: Amount of Gain Recognized in Other Comprehensive Income Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Interest rate swap agreements $ 783 $ 239 $ 3,453 $ 1,307 The cash flow hedges were determined to be highly effective during the periods presented and as a result qualify for hedge accounting treatment. If a hedge was deemed to be ineffective, the amount included in accumulated other comprehensive (loss) income would be reclassified into a line item within the statement of income that impacts operating results. The hedge would no longer be considered effective if a portion of the hedge becomes ineffective, the item hedged is no longer in existence or Pinnacle Financial discontinues hedge accounting. Pinnacle Financial expects the hedges to continue to be highly effective and qualify for hedge accounting during the remaining terms of the swaps. No amounts were reclassified from accumulated other comprehensive income into net income related to these derivatives during the nine months ended September 30, 2018 or 2017 , and no amounts are expected to be reclassified from accumulated other comprehensive income into net income over the next twelve months. On October 24, 2018, cash flow swaps with a notional amount of $ 101.0 million were terminated resulting in a cash settlement equal to previously unrealized gains of $ 1.0 million. These gains are included in accumulated other comprehensive income and will be amortized into net income over the remaining contractual terms of the swaps. Derivatives designated as fair value hedges For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged asset or liability attributable to the hedged risk are recognized in current earnings. The gain or loss on the derivative instrument is presented on the same income statement line item as the earnings effect of the hedged item. Pinnacle Financial utilizes interest rate swaps designated as fair value hedges to mitigate the effect of changing interest rates on the fair values of fixed rate callable securities available-for-sale and fixed rate prepayable loans. The hedging strategy on securities converts the fixed interest rates to LIBOR-based variable interest rates. These derivatives are designated as partial term hedges of selected cash flows covering specified periods of time prior to the call dates of the hedged securities. Pinnacle Financial has elected early adoption of FASB ASU 2017-12, which allows such partial term hedge designations. Pinnacle Financial also utilizes interest rate swaps designated as fair value hedges to mitigate the effect of changing interest rates on the fair values of the loans. As allowed under FASB ASU 2017-12, a specified portion of the prepayable loans have been designated as the hedged assets under the "last-of-layer" method. Such hedging designations are allowed on the portion of a closed portfolio of prepayable assets that is not expected to be affected by prepayments, defaults, and other factors affecting the timing and amount of cash flows. A summary of Pinnacle Financial's fair value hedge relationships as of September 30, 2018 and December 31, 2017 are as follows (in thousands): September 30, 2018 December 31, 2017 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Asset derivatives Interest rate swap agreements - securities Other assets 7.14 2.89% 3 month LIBOR $ 154,145 $ 1,991 $ — $ — Interest rate swap agreements - loans Other assets 2.89 2.77% 3 month LIBOR 900,000 3,358 — — 3.51 2.79% $ 1,054,145 $ 5,349 $ — $ — The effects of Pinnacle Financial's fair value hedge relationships on the income statement during the three and nine months ended September 30, 2018 and 2017 were as follows: Location of Gain on Derivative Amount of Gain Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Asset derivatives 2018 2017 2018 2017 Interest rate swap agreements - securities Interest income on securities $ 1,755 $ — $ 1,991 $ — Interest rate swap agreements - loans Interest income on loans $ 2,236 $ — $ 3,358 $ — Location of Loss on Hedged Item Amount of Loss Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, Asset derivatives 2018 2017 2018 2017 Interest rate swap agreements - securities Interest income on securities $ (1,755 ) $ — $ (1,991 ) $ — Interest rate swap agreements - loans Interest income on loans $ (2,236 ) $ — $ (3,358 ) $ — The following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges at September 30, 2018 and December 31, 2017 : Carrying Amount of the Hedged Assets Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 Line item on the balance sheet Securities available-for-sale $ 147,155 $ — $ (1,991 ) $ — Loans (1) $ 896,642 $ — $ (3,358 ) $ — (1) The carrying amount as shown represents the designated last-of-layer. At September 30, 2018, the total amortized cost basis of the closed portfolio of loans designated in these hedging relationships was $ 2.8 billion. On October 23, 2018, Pinnacle Financial entered into an additional swap transaction with a notional amount of $ 176.8 million designated as fair value hedges. These derivatives are intended to protect against the effects of changing interest rates on the fair values of fixed rate securities. As allowed under FASB ASU 2017-12, these derivatives are designated as partial term hedges covering specified periods of time prior to the call dates of the hedged securities.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
Fair Value of Financial Instruments (Tables)	Sep. 30, 2018
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, 2018 and December 31, 2017 , by caption on the consolidated balance sheets and by FASB ASC 820 valuation hierarchy (as described above) (in thousands): Total carrying value in the consolidated balance sheet Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) September 30, 2018 Investment securities available-for-sale: U.S. Treasury securities $ 30,528 $ — $ 30,528 $ — U.S. government agency securities 63,185 — 63,185 — Mortgage-backed securities 1,294,545 — 1,294,545 — State and municipal securities 1,212,271 — 1,196,917 15,354 Agency-backed securities 334,658 — 334,658 — Corporate notes and other 69,395 — 69,395 — Total investment securities available-for-sale $ 3,004,582 $ — $ 2,989,228 $ 15,354 Other investments 49,351 — 24,169 25,182 Other assets 34,700 — 34,700 — Total assets at fair value $ 3,088,633 $ — $ 3,048,097 $ 40,536 Other liabilities $ 26,727 $ — $ 26,727 $ — Total liabilities at fair value $ 26,727 $ — $ 26,727 $ — December 31, 2017 Investment securities available-for-sale: U.S. Treasury securities $ 30,445 $ — $ 30,445 $ — U.S. government agency securities 180,801 — 180,801 — Mortgage-backed securities 1,263,819 — 1,263,819 — State and municipal securities 784,612 — 767,583 17,029 Agency-backed securities 173,292 — 173,292 — Corporate notes and other 82,314 — 82,314 — Total investment securities available-for-sale 2,515,283 — 2,498,254 17,029 Other investments 53,796 — 24,922 28,874 Other assets 11,812 — 11,812 — Total assets at fair value $ 2,580,891 $ — $ 2,534,988 $ 45,903 Other liabilities $ 13,886 $ — $ 13,886 $ — Total liabilities at fair value $ 13,886 $ — $ 13,886 $ —
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, 2018 and December 31, 2017 (in thousands): September 30, 2018 Total carrying value in the consolidated balance sheet Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) Total gains (losses) for the year-to-date period then ended Other real estate owned $ 17,467 $ — $ — $ 17,467 $ 259 Impaired loans, net (1) 34,082 — — 34,082 (133 ) Total $ 51,549 $ — $ — $ 51,549 $ 126 December 31, 2017 Other real estate owned $ 27,831 $ — $ — $ 27,831 $ 203 Impaired loans, net (1) 22,723 — — 22,723 (4 ) Total $ 50,554 $ — $ — $ 50,554 $ 199 (1) Amount is net of valuation allowance of $2.4 million and $2.2 million at September 30, 2018 and December 31, 2017 , respectively, as required by ASC 310-10, "Receivables."
Rollforward of the Balance Sheet Amounts, Unobservable Input Reconciliation	The table below includes a rollforward of the balance sheet amounts for the three and nine months ended September 30, 2018 and September 30, 2017 (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, 2018 2017 2018 2017 Available-for-sale Securities Other Available-for-sale Securities Other Available-for-sale Securities Other assets Available-for-sale Securities Other assets Fair value, beginning of period $ 15,290 $ 23,578 $ — $ 27,850 $ 17,029 $ 28,874 $ — $ 10,478 Total realized gains included in income 30 81 — 188 90 2,858 — 625 Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at September 30 34 — — — (597 ) — — — Acquired — — — — — — — 17,062 Purchases — 2,455 — 815 — 7,273 — 1,584 Issuances — — — — — — — — Settlements — (932 ) — (376 ) (1,168 ) (1,657 ) — (1,272 ) Transfers out of Level 3 — — — — — (12,166 ) — — Fair value, end of period $ 15,354 $ 25,182 $ — $ 28,477 $ 15,354 $ 25,182 $ — $ 28,477 Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at September 30 $ 30 $ 81 $ — $ 188 $ 90 $ 2,858 $ — $ 625
Carrying Amounts, Estimated Fair Value and Placement in the Fair Value Hierarchy of Financial Instruments	The following table presents the carrying amounts, estimated fair value and placement in the fair value hierarchy of Pinnacle Financial's financial instruments at September 30, 2018 and December 31, 2017 . This table excludes financial instruments for which the carrying amount approximates fair value. For short-term financial assets such as cash and cash equivalents, the carrying amount is a reasonable estimate of fair value due to the relatively short time between the origination of the instrument and its expected realization. For financial liabilities such as non-interest bearing demand, interest-bearing demand, and savings deposits, the carrying amount is a reasonable estimate of fair value due to these products having no stated maturity (in thousands): September 30, 2018 Carrying/ Notional Amount Estimated Fair Value (1) Quoted market prices in an active market (Level 1) Models with significant observable market parameters (Level 2) Models with significant unobservable market parameters (Level 3) Financial assets: Securities held-to-maturity $ 194,997 $ 192,500 $ — $ 192,500 $ — Loans, net 17,384,024 17,201,694 — — 17,201,694 Consumer loans held-for-sale 47,417 47,957 — 47,957 — Commercial loans held-for-sale 11,402 11,532 — 11,532 — Financial liabilities: Deposits and securities sold under agreements to repurchase 18,537,732 17,935,256 — — 17,935,256 Federal Home Loan Bank advances 1,520,603 1,481,374 — — 1,481,374 Subordinated debt and other borrowings 465,487 439,369 — — 439,369 Off-balance sheet instruments: Commitments to extend credit (2) 6,455,039 1,673 — — 1,673 Standby letters of credit (3) 177,796 1,191 — — 1,191 December 31, 2017 Financial assets: Securities held-to-maturity $ 20,762 $ 20,830 $ — $ 20,830 $ — Loans, net 15,565,876 15,252,953 — — 15,252,953 Consumer loans held-for-sale 103,729 104,986 — 104,986 — Commercial loans held-for-sale 25,456 25,761 — 25,761 — Financial liabilities: Deposits and securities sold under agreements to repurchase 16,586,964 16,516,342 — — 16,516,342 Federal Home Loan Bank advances 1,319,909 1,313,311 — — 1,313,311 Subordinated debt and other borrowings 465,505 445,098 — — 445,098 Off-balance sheet instruments: Commitments to extend credit (2) 5,788,425 2,264 — — 2,264 Standby letters of credit (3) 143,684 800 — — 800 (1) Estimated fair values are consistent with an exit-price concept. The assumptions used to estimate the fair values are intended to approximate those that a market-participant would realize in a hypothetical orderly transaction. (2) At the end of each quarter, Pinnacle Financial evaluates the inherent risks of the outstanding off-balance sheet commitments. In making this evaluation, Pinnacle Financial evaluates the credit worthiness of the borrower, the collateral supporting the commitments and any other factors similar to those used to evaluate the inherent risks of our loan portfolio. Additionally, Pinnacle Financial evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at September 30, 2018 and December 31, 2017 , Pinnacle Financial included in other liabilities $1.7 million and $2.3 million, respectively, representing the inherent risks associated with these off-balance sheet commitments. (3) At September 30, 2018 and December 31, 2017 , the aggregate fair value of Pinnacle Financial's standby letters of credit was $1.2 million and $ 800,000 , respectively. These amounts represent the unamortized fee associated with these standby letters of credit and are included in the consolidated balance sheets of Pinnacle Financial and are believed to approximate fair value. These fair values will decrease over time as the existing standby letters of credit approach their expiration dates.

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
Regulatory Matters (Tables)	Sep. 30, 2018
Regulatory Capital Requirements [Abstract]
Summary of Regulatory Capital Requirement	The final rules implementing the Basel Committee on Banking Supervision's capital guidelines for U.S. banks (Basel III rules) became effective for Pinnacle Financial on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. The minimum capital level requirements applicable to bank holding companies and banks subject to the rules are: (i) a common equity Tier 1 capital ratio of 4.5% ; (ii) a Tier 1 risk-based capital ratio of 6% ; (iii) a total risk-based capital ratio of 8% ; and (iv) a Tier 1 leverage ratio of 4% for all institutions. The Basel III rules also establish a capital conservation buffer of 2.5% (to be phased in over three years) above the regulatory minimum risk-based capital ratios. The capital conservation buffer was phased in beginning in January 2016 at 0.625% and is increasing each year by a like percentage until fully implemented in January 2019. The net unrealized gain or loss on available-for-sale securities is not included in computing regulatory capital. Management believes, as of September 30, 2018 , 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 Financial and 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. Pinnacle Financial's and Pinnacle Bank's actual capital amounts and resulting ratios, not including the capital conservation buffer, are presented in the following table (in thousands): Actual Minimum Capital Requirement Minimum To Be Well-Capitalized Amount Ratio Amount Ratio Amount Ratio At September 30, 2018 Total capital to risk weighted assets: Pinnacle Financial $ 2,508,348 12.1 % $ 1,656,444 8.0 % NA NA Pinnacle Bank $ 2,344,597 11.4 % $ 1,650,616 8.0 % $ 2,063,269 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 1,955,095 9.4 % $ 1,242,333 6.0 % NA NA Pinnacle Bank $ 2,133,834 10.3 % $ 1,237,962 6.0 % $ 1,650,616 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 1,954,972 9.4 % $ 931,750 4.5 % NA NA Pinnacle Bank $ 2,133,711 10.3 % $ 928,471 4.5 % $ 1,341,125 6.5 % Tier 1 capital to average assets (): Pinnacle Financial $ 1,955,095 8.8 % $ 888,029 4.0 % NA NA Pinnacle Bank $ 2,133,834 9.6 % $ 885,345 4.0 % $ 1,106,681 5.0 % Actual Minimum Capital Requirement Minimum To Be Well-Capitalized Amount Ratio Amount Ratio Amount Ratio At December 31, 2017 Total capital to risk weighted assets: Pinnacle Financial $ 2,266,161 12.0 % $ 1,509,496 8.0 % NA NA Pinnacle Bank $ 2,134,344 11.3 % $ 1,504,765 8.0 % $ 1,880,956 10.0 % Tier 1 capital to risk weighted assets: Pinnacle Financial $ 1,725,323 9.1 % $ 1,132,122 6.0 % NA NA Pinnacle Bank $ 1,936,313 10.3 % $ 1,128,574 6.0 % $ 1,504,765 8.0 % Common equity Tier 1 capital to risk weighted assets Pinnacle Financial $ 1,725,219 9.1 % $ 849,092 4.5 % NA NA Pinnacle Bank $ 1,936,209 10.3 % $ 846,430 4.5 % $ 1,222,621 6.5 % Tier 1 capital to average assets (): Pinnacle Financial $ 1,725,323 8.6 % $ 797,861 4.0 % NA NA Pinnacle Bank $ 1,936,313 9.7 % $ 796,235 4.0 % $ 995,294 5.0 % (*) Average assets for the above calculations were based on the most recent quarter.

Subordinated Debt and Other b_2

Subordinated Debt and Other borrowings (Tables)	9 Months Ended
Subordinated Debt and Other borrowings (Tables)	Sep. 30, 2018
Subordinated Debt [Abstract]
Schedule of Subordinated Debt and Other Borrowings	Pinnacle Financial has twelve wholly-owned subsidiaries that are statutory business trusts created for the exclusive purpose of issuing 30 -year capital trust preferred securities. Additionally, Pinnacle Financial or Pinnacle Bank has entered into certain other subordinated debt agreements and a revolving credit facility as outlined below and, with respect to the legacy Pinnacle Financial indebtedness, as fully described in the 2017 Form 10-K (in thousands): Name Date Maturity Total Debt Outstanding Interest Rate at Coupon Structure Trust preferred securities Pinnacle Statutory Trust I December 29, 2003 December 30, 2033 $ 10,310 5.13 % 30-day LIBOR + 2.80% Pinnacle Statutory Trust II September 15, 2005 September 30, 2035 20,619 3.80 % 30-day LIBOR + 1.40% Pinnacle Statutory Trust III September 7, 2006 September 30, 2036 20,619 4.05 % 30-day LIBOR + 1.65% Pinnacle Statutory Trust IV October 31, 2007 September 30, 2037 30,928 5.18 % 30-day LIBOR + 2.85% BNC Capital Trust I April 3, 2003 April 15, 2033 5,155 5.59 % 30-day LIBOR + 3.25% BNC Capital Trust II March 11, 2004 April 7, 2034 6,186 5.19 % 30-day LIBOR + 2.85% BNC Capital Trust III September 23, 2004 September 23, 2034 5,155 4.74 % 30-day LIBOR + 2.40% BNC Capital Trust IV September 27, 2006 December 31, 2036 7,217 4.10 % 30-day LIBOR + 1.70% Valley Financial Trust I June 26, 2003 June 26, 2033 4,124 5.47 % 30-day LIBOR + 3.10% Valley Financial Trust II September 26, 2005 December 15, 2035 7,217 3.82 % 30-day LIBOR + 1.49% Valley Financial Trust III December 15, 2006 January 30, 2037 5,155 4.07 % 30-day LIBOR + 1.73% Southcoast Capital Trust III August 5, 2005 September 30, 2035 10,310 3.90 % 30-day LIBOR + 1.50% Subordinated Debt Pinnacle Bank Subordinated Notes July 30, 2015 July 30, 2025 60,000 4.88 % Fixed (1) Pinnacle Bank Subordinated Notes March 10, 2016 July 30, 2025 70,000 4.88 % Fixed (1) Avenue Subordinated Notes December 29, 2014 December 29, 2024 20,000 6.75 % Fixed (2) Pinnacle Financial Subordinated Notes November 16, 2016 November 16, 2026 120,000 5.25 % Fixed (3) BNC Subordinated Notes September 25, 2014 October 1, 2024 60,000 5.50 % Fixed (4) BNC Subordinated Note October 15, 2013 October 15, 2023 10,410 7.08 % 30-day LIBOR + 5.50% (5) Other Borrowings Revolving credit facility (6) April 26, 2018 April 25, 2019 — — 30-day LIBOR + 1.75% Debt issuance costs and fair value adjustments (7,918 ) Total subordinated debt and other borrowings $ 465,487 ______________________ (1) Migrates to three month LIBOR + 3.128% beginning July 30, 2020 through the end of the term. (2) Migrates to three month LIBOR + 4.95% beginning January 1, 2020 through the end of the term. (3) Migrates to three month LIBOR + 3.884% beginning November 16, 2021 through the end of the term. (4) Migrates to three month LIBOR + 3.59% beginning October 1, 2019 through the end of the term if not redeemed on that date. (5) Coupon structure includes a floor of 5.5% and a cap of 9.5% . (6) Borrowing capacity on the revolving credit facility is $75.0 million . At September 30, 2018 , there was no outstanding balance under this facility. An unused fee of 0.35% is assessed on the average daily unused amount of the loan.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	Jun. 16, 2017shares	Jan. 27, 2017USD ($)shares	Sep. 30, 2017shares	Sep. 30, 2018market
Schedule of Equity Method Investments [Line Items]
Number of markets entity operates \| market				11
Underwritten public offering
Schedule of Equity Method Investments [Line Items]
Net proceeds of offering \| $		$ 192.2
Shares issued (in shares)		3,220,000
Over-allotment option
Schedule of Equity Method Investments [Line Items]
Shares issued (in shares)		420,000
Bankers Healthcare Group, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (as percent)				49.00%
Common Stock \| BNC Bancorp
Schedule of Equity Method Investments [Line Items]
Common stock issued in conjunction with acquisition (in shares)	27,687,100		27,687,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounting Policies [Abstract]
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued	[1]			0	1,858,133,000
Cash Transactions:
Interest paid				$ 136,154,000	$ 56,804,000
Income taxes paid, net				55,525,000	53,199,000
Noncash Transactions:
Loans charged-off to the allowance for loan losses		$ 6,949,000	$ 5,987,000	22,316,000	16,308,000
Loans foreclosed upon and transferred to other real estate owned				2,066,000	3,573,000
Loans foreclosed upon and transferred to other assets				1,580,000	641,000
Other Real Estate Sales Financed				276,000	0
Available-for-sale securities transferred to Held-to-Maturity				179,763,000	0
Transfer of Loans Held-for-sale to Portfolio Loans				$ 44,980,000	$ 0

[1]	See Note 2 to these consolidated financial statement for more detailed information.

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Basic and Diluted Net Income Per Share Calculations (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Basic net income per share calculation:
Numerator - Net income	$ 93,747,000	$ 64,442,000	$ 264,122,000	$ 147,181,000
Denominator - Weighted average common shares outstanding (in shares)	77,145,023	76,678,584	77,116,377	59,371,202
Basic net income per common share (in dollars per share)	$ 1.22	$ 0.84	$ 3.42	$ 2.48
Diluted net income per share calculation:
Numerator – Net income	$ 93,747,000	$ 64,442,000	$ 264,122,000	$ 147,181,000
Denominator - Weighted average common shares outstanding (in shares)	77,145,023	76,678,584	77,116,377	59,371,202
Dilutive shares contingently issuable (in shares)	345,954	553,514	326,177	539,142
Weighted average diluted common shares outstanding (in shares)	77,490,977	77,232,098	77,442,554	59,910,344
Diluted net income per common share (in dollars per share)	$ 1.21	$ 0.83	$ 3.41	$ 2.46

Acquisitions - Consideration Pa

Acquisitions - Consideration Paid and Allocation of Purchase Price to Net Assets Acquired (Details) - USD ($)	Jun. 16, 2017	Sep. 30, 2018	Dec. 31, 2017
Allocation of total consideration paid:
Goodwill		$ 1,807,121,000	$ 1,808,002,000
BNC Bancorp
Equity consideration:
Total equity consideration	$ 1,858,133,000
Non-equity consideration:
Cash paid to redeem common stock	129,000
Allocation of total consideration paid:
Fair value of net assets assumed including identifiable intangible assets	602,689,000
Goodwill	1,255,573,000
Total consideration paid	$ 1,858,262,000
BNC Bancorp \| Common Stock
Equity consideration:
Common stock issued (in shares)	27,687,100
Total equity consideration	$ 1,858,133,000

Acquisitions - Net Assets Acqui

Acquisitions - Net Assets Acquired (Details) - BNC Bancorp $ in Thousands	Jun. 16, 2017USD ($)
Liabilities
Fair value of net assets assumed including estimated identifiable intangible assets	$ 602,689
Estimated uncollectible loans (as percent)	2.60%
Percentage of expected uncollectible loans acquired	3.10%
Historical Cost Basis
Assets
Cash and cash equivalents	$ 155,271
Investment securities	643,875
Loans	5,782,720	[1]
Mortgage loans held for sale	27,026
Other real estate owned	20,143	[2]
Core deposit intangible	0	[3]
Property, plant and equipment	156,805	[4]
Other assets	320,988	[5]
Total Assets	7,106,828
Liabilities
Interest-bearing deposits	5,003,653	[6]
Non-interest bearing deposits	1,199,342
Borrowings	183,389	[7]
Other liabilities	35,729	[8]
Total Liabilities	6,422,113
Fair value of net assets assumed including estimated identifiable intangible assets	684,715
Fair Value Adjustments
Assets
Cash and cash equivalents	0	[9]
Investment securities	1,667	[9]
Loans	(181,430)	[1],[9]
Mortgage loans held for sale	0	[9]
Other real estate owned	1,382	[2],[9]
Core deposit intangible	50,422	[3],[9]
Property, plant and equipment	(3,341)	[4],[9]
Other assets	54,057	[5],[9]
Total Assets	(77,243)	[9]
Liabilities
Interest-bearing deposits	4,355	[6],[9]
Non-interest bearing deposits	0	[9]
Borrowings	(6,412)	[7],[9]
Other liabilities	6,840	[8],[9]
Total Liabilities	4,783	[9]
Fair value of net assets assumed including estimated identifiable intangible assets	(82,026)	[9]
As Recorded by PNFP
Assets
Cash and cash equivalents	155,271
Investment securities	645,542
Loans	5,601,290	[1]
Mortgage loans held for sale	27,026
Other real estate owned	21,525	[2]
Core deposit intangible	50,422	[3]
Property, plant and equipment	153,464	[4]
Other assets	375,045	[5]
Total Assets	7,029,585
Liabilities
Interest-bearing deposits	5,008,008	[6]
Non-interest bearing deposits	1,199,342
Borrowings	176,977	[7]
Other liabilities	42,569	[8]
Total Liabilities	6,426,896
Fair value of net assets assumed including estimated identifiable intangible assets	$ 602,689

[1]	The amount represents the adjustment of the net book value of BNC's loans to their estimated fair value based on interest rates and expected cash flows as of the date of acquisition, which includes estimates of expected credit losses inherent in the portfolio of approximately 2.6% of the 3.1% mark on the acquired loan portfolio.
[2]	This adjustment reflects the Day 1 value of OREO properties.
[3]	The amount represents the fair value of the core deposit intangible asset representing the intangible value of the deposit base acquired and the fair value of the customer relationship intangible assets representing the intangible value of customer relationships acquired.
[4]	The amount represents the adjustment of the net book value of BNC's property, plant and equipment to estimated fair value based on market values of similar assets.
[5]	The amount represents the deferred tax asset recognized on the fair value adjustment of BNC's acquired assets and assumed liabilities
[6]	The amount represents the adjustment necessary because the weighted average interest rate of BNC's deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio.
[7]	The amount represents the combined adjustment necessary because the weighted average interest rate of BNC's subordinated debt issuance exceeded the cost of similar funding at the time of acquisition and because the weighted average interest rate of BNC's trust preferred securities issuances was lower than the cost of similar funding at the time of acquisition. The combined fair value adjustments will be amortized to increase future interest expense over the lives of the instruments.
[8]	The amount represents the adjustment to accrue obligations that existed but had not been recorded as of the acquisition date and the fair value of BNC lease obligations.
[9]	The amount represents the adjustment of the book value of BNC's assets and liabilities to their estimated fair value on the date of acquisition. Fair value adjustments were updated subsequent to the merger date based on the results of finalized valuation assessments.

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - BNC Bancorp $ in Thousands	Jun. 16, 2017USD ($)
Business Acquisition [Line Items]
Transaction costs	$ 7,200
Fair value of net assets assumed including estimated identifiable intangible assets	602,689
Fair Value Adjustments
Business Acquisition [Line Items]
Fair value of net assets assumed including estimated identifiable intangible assets	$ (82,026)	[1]

[1]	The amount represents the adjustment of the book value of BNC's assets and liabilities to their estimated fair value on the date of acquisition. Fair value adjustments were updated subsequent to the merger date based on the results of finalized valuation assessments.

Acquisitions - Supplemental Pro

Acquisitions - Supplemental Pro-forma Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Business Combinations [Abstract]
Revenue	$ 619,326	[1]
Income before income taxes	$ 261,516

[1]	Net interest income plus noninterest income.

Equity method investment - Fina

Equity method investment - Financial Position and Results of Operations (Details) - Bankers Healthcare Group, LLC - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Assets	$ 436,693		$ 436,693		$ 330,030
Liabilities	322,323		322,323		224,837
Membership interests	114,370		114,370		105,193
Total liabilities and membership interests	436,693		436,693		$ 330,030
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Revenues	59,133	$ 41,997	151,937	$ 113,244
Net income	$ 30,933	$ 20,428	$ 69,039	$ 54,453

Equity method investment - Narr

Equity method investment - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
Equity method investment - Narrative (Details) - USD ($)	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Technology, trade name and customer relationship intangibles	$ 48,737,000		$ 48,737,000		$ 56,710,000
Amortization of Intangible Assets	2,616,000	$ 3,077,000	7,973,000	$ 5,745,000
Dividends received from equity method investment			33,651,000	19,372,000
Bankers Healthcare Group, LLC
Schedule of Equity Method Investments [Line Items]
Technology, trade name and customer relationship intangibles	11,300,000		11,300,000		$ 13,400,000
Amortization of Intangible Assets	693,000	832,000	2,100,000	2,500,000
Accretion income	719,000	758,000	2,200,000	2,300,000
Dividends received from equity method investment	10,200,000	4,500,000	33,700,000	19,400,000
Loan face amount	$ 0	$ 0	$ 0	$ 0

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Securities available-for-sale [Abstract]
Amortized Cost	$ 3,074,274,000		$ 2,513,540,000
Gross Unrealized Gains	6,795,000		19,244,000
Gross Unrealized Losses	76,487,000		17,501,000
Securities available-for-sale, at fair value	3,004,582,000		2,515,283,000
Available-for-sale, Amortized Cost [Abstract]
Due in one year or less	34,856,000
Due in one year to five years	77,055,000
Due in five years to ten years	159,471,000
Due after ten years	1,133,705,000
Mortgage-backed securities	1,334,640,000
Asset-backed securities	334,547,000
Amortized Cost	3,074,274,000
Available-for-sale, Fair Value [Abstract]
Due in one year or less	34,802,000
Due in one year to five years	77,059,000
Due in five years to ten years	157,274,000
Due after ten years	1,106,244,000
Mortgage-backed securities	1,294,545,000
Asset-backed securities	334,658,000
Securities available-for-sale, at fair value	3,004,582,000		2,515,283,000
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale securities transferred to Held-to-Maturity	179,763,000	$ 0
Unrealized after tax loss on available-for-sale securities transferred to the held-to-maturity portfolio	2,200,000
Securities held-to-maturity [Abstract]
Amortized Cost	194,997,000		20,762,000
Gross Unrealized Gains	9,000		114,000
Gross Unrealized Losses	2,506,000		46,000
Securities held-to-maturity, fair value	192,500,000		20,830,000
Held-to-maturity, Amortized Cost [Abstract]
Due in one year or less	315,000
Due in one year to five years	6,066,000
Due in five years to ten years	7,997,000
Due after ten years	180,619,000
Mortgage-backed securities	0
Asset-backed securities	0
Amortized Cost	194,997,000		20,762,000
Held-to-maturity, Fair Value [Abstract]
Due in one year or less	316,000
Due in one year to five years	6,044,000
Due in five years to ten years	7,875,000
Due after ten years	178,265,000
Mortgage-backed securities	0
Asset-backed securities	0
Fair Value	192,500,000		20,830,000
U.S. Treasury securities
Securities available-for-sale [Abstract]
Amortized Cost	30,573,000		30,505,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	45,000		60,000
Securities available-for-sale, at fair value	30,528,000		30,445,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	30,528,000		30,445,000
U.S. government agency securities
Securities available-for-sale [Abstract]
Amortized Cost	64,640,000		182,500,000
Gross Unrealized Gains	45,000		67,000
Gross Unrealized Losses	1,500,000		1,766,000
Securities available-for-sale, at fair value	63,185,000		180,801,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	63,185,000		180,801,000
Mortgage-backed securities
Securities available-for-sale [Abstract]
Amortized Cost	1,334,640,000		1,270,625,000
Gross Unrealized Gains	3,268,000		5,318,000
Gross Unrealized Losses	43,363,000		12,124,000
Securities available-for-sale, at fair value	1,294,545,000		1,263,819,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	1,294,545,000		1,263,819,000
State and municipal securities
Securities available-for-sale [Abstract]
Amortized Cost	1,240,136,000		774,949,000
Gross Unrealized Gains	1,995,000		12,251,000
Gross Unrealized Losses	29,860,000		2,588,000
Securities available-for-sale, at fair value	1,212,271,000		784,612,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	1,212,271,000		784,612,000
Asset-backed securities
Securities available-for-sale [Abstract]
Amortized Cost	334,547,000		173,346,000
Gross Unrealized Gains	870,000		262,000
Gross Unrealized Losses	759,000		316,000
Securities available-for-sale, at fair value	334,658,000		173,292,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	334,658,000		173,292,000
Corporate notes and other
Securities available-for-sale [Abstract]
Amortized Cost	69,738,000		81,615,000
Gross Unrealized Gains	617,000		1,346,000
Gross Unrealized Losses	960,000		647,000
Securities available-for-sale, at fair value	69,395,000		82,314,000
Available-for-sale, Fair Value [Abstract]
Securities available-for-sale, at fair value	69,395,000		82,314,000
State and municipal securities
Securities held-to-maturity [Abstract]
Amortized Cost	194,997,000		20,762,000
Gross Unrealized Gains	9,000		114,000
Gross Unrealized Losses	2,506,000		46,000
Securities held-to-maturity, fair value	192,500,000		20,830,000
Held-to-maturity, Amortized Cost [Abstract]
Amortized Cost	194,997,000		20,762,000
Held-to-maturity, Fair Value [Abstract]
Fair Value	$ 192,500,000		$ 20,830,000

Securities- Unrealized Losses (

Securities- Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	$ 1,704,605	$ 1,017,346
Investments with an unrealized loss of less than 12 months, unrealized losses	36,950	9,021
Investments with an unrealized loss of 12 months or longer, fair value	984,619	361,724
Investments with an unrealized loss of 12 months or longer, unrealized losses	44,939	8,526
Total investments with an unrealized loss, fair value	2,689,224	1,379,070
Total investments with an unrealized loss, unrealized losses	81,889	17,547
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	30,284	29,948
Investments with an unrealized loss of less than 12 months, unrealized losses	39	60
Investments with an unrealized loss of 12 months or longer, fair value	244	0
Investments with an unrealized loss of 12 months or longer, unrealized losses	6	0
Total investments with an unrealized loss, fair value	30,528	29,948
Total investments with an unrealized loss, unrealized losses	45	60
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	13,605	173,677
Investments with an unrealized loss of less than 12 months, unrealized losses	360	1,766
Investments with an unrealized loss of 12 months or longer, fair value	45,118	0
Investments with an unrealized loss of 12 months or longer, unrealized losses	1,140	0
Total investments with an unrealized loss, fair value	58,723	173,677
Total investments with an unrealized loss, unrealized losses	1,500	1,766
Mortgage-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	289,149	607,408
Investments with an unrealized loss of less than 12 months, unrealized losses	5,951	5,042
Investments with an unrealized loss of 12 months or longer, fair value	807,418	285,561
Investments with an unrealized loss of 12 months or longer, unrealized losses	37,412	7,082
Total investments with an unrealized loss, fair value	1,096,567	892,969
Total investments with an unrealized loss, unrealized losses	43,363	12,124
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	1,144,600	115,403
Investments with an unrealized loss of less than 12 months, unrealized losses	29,599	1,408
Investments with an unrealized loss of 12 months or longer, fair value	108,653	50,083
Investments with an unrealized loss of 12 months or longer, unrealized losses	5,663	1,226
Total investments with an unrealized loss, fair value	1,253,253	165,486
Total investments with an unrealized loss, unrealized losses	35,262	2,634
Asset-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	204,638	68,742
Investments with an unrealized loss of less than 12 months, unrealized losses	741	198
Investments with an unrealized loss of 12 months or longer, fair value	4,505	14,136
Investments with an unrealized loss of 12 months or longer, unrealized losses	18	118
Total investments with an unrealized loss, fair value	209,143	82,878
Total investments with an unrealized loss, unrealized losses	759	316
Corporate notes
Available-for-sale securities, continuous unrealized loss position [Abstract]
Investments with an unrealized loss of less than 12 months, fair value	22,329	22,168
Investments with an unrealized loss of less than 12 months, unrealized losses	260	547
Investments with an unrealized loss of 12 months or longer, fair value	18,681	11,944
Investments with an unrealized loss of 12 months or longer, unrealized losses	700	100
Total investments with an unrealized loss, fair value	41,010	34,112
Total investments with an unrealized loss, unrealized losses	$ 960	$ 647

Securities Securities - Narrati

Securities Securities - Narrative (Details) - USD ($)	Oct. 29, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Securities pledged as collateral to secure public funds and other deposits or securities sold under agreements to repurchase		$ 1,345,000,000		$ 1,345,000,000
Secured borrowing under agreement to repurchase		130,217,000		130,217,000
Accumulated unrealized losses		81,889,000		81,889,000		$ 17,547,000
Fair value of securities		2,689,224,000		2,689,224,000		$ 1,379,070,000
Debt Securities Available-for-sale Sold Amount	$ 119,900,000			22,700,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	$ (1,100,000)	8,000	$ 0	30,000	$ 0
Securities pledged as collateral
Debt Securities, Available-for-sale [Line Items]
Secured borrowing under agreement to repurchase		$ 130,217,000		$ 130,217,000

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses Loans and Allowance for Loan Losses - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of loan portfolio as commercial loan	81.20%		81.20%
Risk rated loans	$ 1,000,000		$ 1,000,000
Impaired receivable increase	82,346,000	$ 39,516,000	73,284,000	$ 36,293,000
Cash payments received on nonaccrual loans	0		0	65,000
Nonaccrual loans	1,100,000	849,000	2,800,000	2,100,000
Troubled debt restructurings performing as of restructure date	$ 6,100,000		$ 6,100,000		$ 6,600,000
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	$ 38,600,000		$ 38,600,000		26,400,000
Amount drawn from loans and other extensions of credit granted	19,600,000		19,600,000		16,100,000
Commercial loans held-for-sale	11,402,000		11,402,000		25,456,000
Mortgage loans held-for-sale	46,300,000		46,300,000		$ 102,700,000
Loans sold			917,900,000	756,729,000
Gain on mortgage loans sold, net	$ 3,902,000	$ 5,963,000	$ 11,400,000	$ 14,785,000
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of credit exposure to risk based capital	87.80%		87.80%		89.40%
Non-owner occupied commercial real estate and multifamily loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of credit exposure to risk based capital	287.60%		287.60%		297.10%

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses - Loan Classification by Risk Rating Category (Details) - USD ($)		Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans		$ 17,464,009,000	$ 15,633,116,000
Potential problem loans not included in nonperforming assets		202,500,000	164,000,000
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans		17,103,690,000	15,237,775,000
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans		75,764,000	168,713,000
Substandard-accrual
Financing Receivable, Recorded Investment [Line Items]
Loans	[1]	206,687,000	169,173,000
Substandard-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		77,868,000	57,455,000
Doubtful-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		0	0
Commercial real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans		7,215,119,000	6,669,610,000
Commercial real estate - mortgage \| Pass
Financing Receivable, Recorded Investment [Line Items]
Loans		7,058,133,000	6,487,368,000
Commercial real estate - mortgage \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans		30,291,000	94,134,000
Commercial real estate - mortgage \| Substandard-accrual
Financing Receivable, Recorded Investment [Line Items]
Loans	[1]	96,729,000	72,044,000
Commercial real estate - mortgage \| Substandard-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		29,966,000	16,064,000
Commercial real estate - mortgage \| Doubtful-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		0	0
Consumer real estate - mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans		2,815,160,000	2,561,214,000
Consumer real estate - mortgage \| Pass
Financing Receivable, Recorded Investment [Line Items]
Loans		2,766,126,000	2,503,688,000
Consumer real estate - mortgage \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans		10,534,000	18,356,000
Consumer real estate - mortgage \| Substandard-accrual
Financing Receivable, Recorded Investment [Line Items]
Loans	[1]	13,234,000	21,053,000
Consumer real estate - mortgage \| Substandard-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		25,266,000	18,117,000
Consumer real estate - mortgage \| Doubtful-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		0	0
Construction and land development
Financing Receivable, Recorded Investment [Line Items]
Loans		2,059,009,000	1,908,288,000
Construction and land development \| Pass
Financing Receivable, Recorded Investment [Line Items]
Loans		2,046,299,000	1,880,704,000
Construction and land development \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans		3,002,000	8,148,000
Construction and land development \| Substandard-accrual
Financing Receivable, Recorded Investment [Line Items]
Loans	[1]	6,313,000	13,468,000
Construction and land development \| Substandard-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		3,395,000	5,968,000
Construction and land development \| Doubtful-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		0	0
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans		5,006,247,000	4,141,341,000
Commercial and industrial \| Pass
Financing Receivable, Recorded Investment [Line Items]
Loans		4,866,409,000	4,014,656,000
Commercial and industrial \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans		31,213,000	46,898,000
Commercial and industrial \| Substandard-accrual
Financing Receivable, Recorded Investment [Line Items]
Loans	[1]	90,345,000	62,529,000
Commercial and industrial \| Substandard-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		18,280,000	17,258,000
Commercial and industrial \| Doubtful-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		0	0
Consumer and other
Financing Receivable, Recorded Investment [Line Items]
Loans		368,474,000	352,663,000
Consumer and other \| Pass
Financing Receivable, Recorded Investment [Line Items]
Loans		366,723,000	351,359,000
Consumer and other \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans		724,000	1,177,000
Consumer and other \| Substandard-accrual
Financing Receivable, Recorded Investment [Line Items]
Loans	[1]	66,000	79,000
Consumer and other \| Substandard-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		961,000	48,000
Consumer and other \| Doubtful-nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Loans		$ 0	$ 0

[1]	Potential problem loans represent those loans with a well-defined weakness and where information about possible credit problems of borrowers has caused management to have doubts about the borrower's ability to comply with present repayment terms. This definition is believed to be substantially consistent with the standards established by Pinnacle Bank's primary regulators for loans classified as substandard, excluding the impact of nonaccrual loans and troubled debt restructurings. Potential problem loans, which are not included in nonaccrual loans, amounted to approximately $202.5 million at September 30, 2018, compared to $164.0 million at December 31, 2017.

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses - Rollforward of Purchase Credit Impaired Loans (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Gross Carrying Value
Gross carrying value, beginning balance	$ 74,324
Year-to-date settlements	(21,332)
Gross carrying value, ending balance	52,992
Accretable Yield
Accretable yield, beginning balance	(132)
Year-to-date settlements	21
Accretable yield, ending balance	(111)
Nonaccretable Yield
Nonaccretable yield, beginning balance	(31,537)
Year-to-date settlements	12,262
Nonaccretable yield, ending balance	(19,275)
Net Carrying Value
Net carrying value, beginning balance	42,655
Year-to-date settlements	(9,049)
Net carrying value, ending balance	$ 33,606

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses - Recorded Investment, Principal Balance and Related Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 83,861		$ 83,861		$ 58,979
Unpaid principal balances	84,041		84,041		59,354
Valuation allowance	2,378		2,378		2,198
Average recorded investment	82,346	$ 39,516	73,284	$ 36,293
Interest income recognized	0	0	0	65
Impaired loans with an allowance:
Financing Receivable, Impaired [Line Items]
Recorded investment	36,460		36,460		24,921
Unpaid principal balances	36,596		36,596		25,114
Valuation allowance	2,378		2,378		2,198
Average recorded investment	37,168	17,535	32,070	15,258
Interest income recognized	0	0	0	0
Impaired loans with an allowance: \| Commercial real estate - mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	10,282		10,282		1,850
Unpaid principal balances	10,305		10,305		1,863
Valuation allowance	461		461		95
Average recorded investment	13,474	264	9,297	350
Interest income recognized	0	0	0	0
Impaired loans with an allowance: \| Consumer real estate - mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	15,746		15,746		8,028
Unpaid principal balances	15,808		15,808		8,079
Valuation allowance	490		490		410
Average recorded investment	14,162	4,593	11,476	4,230
Interest income recognized	0	0	0	0
Impaired loans with an allowance: \| Construction and land development
Financing Receivable, Impaired [Line Items]
Recorded investment	563		563		2,522
Unpaid principal balances	564		564		2,528
Valuation allowance	15		15		66
Average recorded investment	1,150	81	1,301	78
Interest income recognized	0	0	0	0
Impaired loans with an allowance: \| Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded investment	8,908		8,908		12,521
Unpaid principal balances	8,939		8,939		12,644
Valuation allowance	1,265		1,265		1,627
Average recorded investment	7,470	12,235	9,345	10,068
Interest income recognized	0	0	0	0
Impaired loans with an allowance: \| Consumer and other
Financing Receivable, Impaired [Line Items]
Recorded investment	961		961		0
Unpaid principal balances	980		980		0
Valuation allowance	147		147		0
Average recorded investment	912	362	651	532
Interest income recognized	0	0	0	0
Impaired loans without an allowance:
Financing Receivable, Impaired [Line Items]
Recorded investment	47,401		47,401		34,058
Unpaid principal balances	47,445		47,445		34,240
Valuation allowance	0		0		0
Average recorded investment	45,178	21,981	41,214	21,035
Interest income recognized	0	0	0	65
Impaired loans without an allowance: \| Commercial real estate - mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	21,457		21,457		16,364
Unpaid principal balances	21,481		21,481		16,514
Valuation allowance	0		0		0
Average recorded investment	22,029	6,981	18,702	4,638
Interest income recognized	0	0	0	0
Impaired loans without an allowance: \| Consumer real estate - mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	6,382		6,382		4,144
Unpaid principal balances	6,419		6,419		4,174
Valuation allowance	0		0		0
Average recorded investment	5,699	7,003	5,034	6,122
Interest income recognized	0	0	0	0
Impaired loans without an allowance: \| Construction and land development
Financing Receivable, Impaired [Line Items]
Recorded investment	2,884		2,884		2,645
Unpaid principal balances	2,883		2,883		2,650
Valuation allowance	0		0		0
Average recorded investment	1,442	1,324	1,382	1,702
Interest income recognized	0	0	0	65
Impaired loans without an allowance: \| Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded investment	16,678		16,678		10,905
Unpaid principal balances	16,662		16,662		10,902
Valuation allowance	0		0		0
Average recorded investment	16,008	6,673	16,096	8,573
Interest income recognized	0	0	0	0
Impaired loans without an allowance: \| Consumer and other
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0		0
Unpaid principal balances	0		0		0
Valuation allowance	0		0		$ 0
Average recorded investment	0	0	0	0
Interest income recognized	$ 0	$ 0	$ 0	$ 0

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) - Troubled Debt Restructurings [Member] $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)contract	Sep. 30, 2017USD ($)contract	Sep. 30, 2018USD ($)contract	Sep. 30, 2017USD ($)contract
Troubled debt restructuring categorized by loan classification [Abstract]
Number of contracts \| contract	2	1	3	4
Pre Modification Outstanding Recorded Investment	$ 517	$ 501	$ 554	$ 2,479
Post Modification Outstanding Recorded Investment, net of related allowance	$ 517	$ 145	$ 554	$ 1,778
Commercial real estate - mortgage
Troubled debt restructuring categorized by loan classification [Abstract]
Number of contracts \| contract	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
Troubled debt restructuring categorized by loan classification [Abstract]
Number of contracts \| contract	1	0	2	1
Pre Modification Outstanding Recorded Investment	$ 169	$ 0	$ 206	$ 7
Post Modification Outstanding Recorded Investment, net of related allowance	$ 169	$ 0	$ 206	$ 5
Construction and land development
Troubled debt restructuring categorized by loan classification [Abstract]
Number of contracts \| contract	1	0	1	0
Pre Modification Outstanding Recorded Investment	$ 348	$ 0	$ 348	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	$ 348	$ 0	$ 348	$ 0
Commercial and industrial
Troubled debt restructuring categorized by loan classification [Abstract]
Number of contracts \| contract	0	1	0	3
Pre Modification Outstanding Recorded Investment	$ 0	$ 501	$ 0	$ 2,472
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 145	$ 0	$ 1,773
Consumer and other
Troubled debt restructuring categorized by loan classification [Abstract]
Number of contracts \| contract	0	0	0	0
Pre Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	$ 0	$ 0	$ 0	$ 0

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses - Industry Classification System (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Lessors of nonresidential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	$ 3,146,798
Unfunded Commitments	692,316
Total exposure	3,839,114	$ 3,483,597
Lessors of residential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	983,084
Unfunded Commitments	269,344
Total exposure	1,252,428	1,151,676
Hotels (except for Casino Hotels) and Motels
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	760,355
Unfunded Commitments	157,315
Total exposure	917,670	836,320
236117 New Housing Operative Builders [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	459,501
Unfunded Commitments	567,914
Total exposure	$ 1,027,415	$ 780,137

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses - Financing Receivables Past Due (Details) - USD ($)		Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		$ 17,464,009,000	$ 15,633,116,000
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest	[1]	65,735,000	41,519,000
Currently performing impaired loans		54,600,000	45,800,000
Purchased credit impaired, accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		21,472,000	26,719,000
Purchased credit impaired, nonaccruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest		12,133,000	15,936,000
Past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		43,990,000	60,158,000
30-89 days past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		42,217,000	56,019,000
90 days or more past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		1,773,000	4,139,000
Current and Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		17,320,679,000	15,488,784,000
Commercial real estate - mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		7,215,119,000	6,669,610,000
Commercial real estate - mortgage \| Owner-occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,688,245,000	2,460,015,000
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest	[1]	19,738,000	11,395,000
Commercial real estate - mortgage \| Owner-occupied \| Purchased credit impaired, accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,769,000	4,820,000
Commercial real estate - mortgage \| Owner-occupied \| Purchased credit impaired, nonaccruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest		1,754,000	1,105,000
Commercial real estate - mortgage \| Owner-occupied \| Past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		7,756,000	6,876,000
Commercial real estate - mortgage \| Owner-occupied \| 30-89 days past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		7,756,000	6,772,000
Commercial real estate - mortgage \| Owner-occupied \| 90 days or more past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		0	104,000
Commercial real estate - mortgage \| Owner-occupied \| Current and Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,656,228,000	2,435,819,000
Commercial real estate - mortgage \| All other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		4,526,874,000	4,209,595,000
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest	[1]	5,591,000	704,000
Commercial real estate - mortgage \| All other \| Purchased credit impaired, accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		11,382,000	12,018,000
Commercial real estate - mortgage \| All other \| Purchased credit impaired, nonaccruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest		2,883,000	2,860,000
Commercial real estate - mortgage \| All other \| Past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,633,000	16,559,000
Commercial real estate - mortgage \| All other \| 30-89 days past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,633,000	16,559,000
Commercial real estate - mortgage \| All other \| 90 days or more past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		0	0
Commercial real estate - mortgage \| All other \| Current and Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		4,504,385,000	4,177,454,000
Consumer real estate - mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,815,160,000	2,561,214,000
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest	[1]	19,165,000	9,320,000
Consumer real estate - mortgage \| Purchased credit impaired, accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		3,735,000	5,249,000
Consumer real estate - mortgage \| Purchased credit impaired, nonaccruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest		6,101,000	8,797,000
Consumer real estate - mortgage \| Past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		13,358,000	16,100,000
Consumer real estate - mortgage \| 30-89 days past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		13,358,000	14,835,000
Consumer real estate - mortgage \| 90 days or more past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		0	1,265,000
Consumer real estate - mortgage \| Current and Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,772,801,000	2,521,748,000
Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,059,009,000	1,908,288,000
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest	[1]	2,024,000	2,878,000
Construction and land development \| Purchased credit impaired, accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,778,000	3,478,000
Construction and land development \| Purchased credit impaired, nonaccruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest		1,371,000	3,090,000
Construction and land development \| Past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		3,368,000	4,282,000
Construction and land development \| 30-89 days past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		3,368,000	4,136,000
Construction and land development \| 90 days or more past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		0	146,000
Construction and land development \| Current and Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		2,049,468,000	1,894,560,000
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		5,006,247,000	4,141,341,000
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest	[1]	18,256,000	17,222,000
Commercial and industrial \| Purchased credit impaired, accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		808,000	1,154,000
Commercial and industrial \| Purchased credit impaired, nonaccruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest		24,000	84,000
Commercial and industrial \| Past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		11,869,000	8,754,000
Commercial and industrial \| 30-89 days past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		10,741,000	7,406,000
Commercial and industrial \| 90 days or more past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		1,128,000	1,348,000
Commercial and industrial \| Current and Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		4,975,290,000	4,114,127,000
Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		368,474,000	352,663,000
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest	[1]	961,000	0
Consumer and other \| Purchased credit impaired, accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		0	0
Consumer and other \| Purchased credit impaired, nonaccruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest		0	0
Consumer and other \| Past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		5,006,000	7,587,000
Consumer and other \| 30-89 days past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		4,361,000	6,311,000
Consumer and other \| 90 days or more past due and accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		645,000	1,276,000
Consumer and other \| Current and Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans		$ 362,507,000	$ 345,076,000

[1]	Approximately $54.6 million and $45.8 million of nonaccrual loans as of September 30, 2018 and December 31, 2017, respectively, were performing pursuant to their contractual terms at those dates.

Loans and Allowance for Loan_10

Loans and Allowance for Loan Losses - Allowance Allocation (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Allowance for Loan Losses	$ 79,985,000	$ 67,240,000
Troubled debt restructurings performing as of restructure date	$ 6,100,000	$ 6,600,000

Loans and Allowance for Loan_11

Loans and Allowance for Loan Losses - Allowance for Credit Losses (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		$ 75,670,000	$ 61,944,000	$ 67,240,000	$ 58,980,000
Charged-off loans		(6,949,000)	(5,987,000)	(22,316,000)	(16,308,000)
Recovery of previously charged-off loans		2,539,000	2,282,000	10,003,000	5,103,000
Provision for loan losses		8,725,000	6,920,000	25,058,000	17,384,000
Ending Balance		79,985,000	65,159,000	79,985,000	65,159,000
Loans acquired with deteriorated credit quality (1)
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	[1]			573,000
Ending Balance	[1]	11,000		11,000
Commercial real estate - mortgage
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		24,848,000	16,002,000	21,188,000	13,655,000
Charged-off loans		(1,968,000)	(572,000)	(2,930,000)	(581,000)
Recovery of previously charged-off loans		63,000	169,000	1,517,000	184,000
Provision for loan losses		3,574,000	5,191,000	6,742,000	7,532,000
Ending Balance		26,517,000	20,790,000	26,517,000	20,790,000
Commercial real estate - mortgage \| Loans acquired with deteriorated credit quality (1)
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	[1]			340,000
Ending Balance	[1]	9,000		9,000
Consumer real estate - mortgage
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		5,853,000	7,835,000	5,031,000	6,564,000
Charged-off loans		(262,000)	(395,000)	(1,533,000)	(663,000)
Recovery of previously charged-off loans		987,000	565,000	2,190,000	1,147,000
Provision for loan losses		149,000	(2,702,000)	1,039,000	(1,745,000)
Ending Balance		6,727,000	5,303,000	6,727,000	5,303,000
Consumer real estate - mortgage \| Loans acquired with deteriorated credit quality (1)
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	[1]			161,000
Ending Balance	[1]	2,000		2,000
Construction and land development
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		10,984,000	5,126,000	8,962,000	3,624,000
Charged-off loans		(24,000)	(99,000)	(36,000)	(99,000)
Recovery of previously charged-off loans		70,000	716,000	1,645,000	845,000
Provision for loan losses		(48,000)	1,780,000	411,000	3,153,000
Ending Balance		10,982,000	7,523,000	10,982,000	7,523,000
Construction and land development \| Loans acquired with deteriorated credit quality (1)
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	[1]			17,000
Ending Balance	[1]	0		0
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		28,338,000	24,235,000	24,863,000	24,743,000
Charged-off loans		(3,336,000)	(1,625,000)	(7,600,000)	(3,278,000)
Recovery of previously charged-off loans		1,037,000	562,000	2,492,000	1,264,000
Provision for loan losses		4,085,000	235,000	10,369,000	678,000
Ending Balance		30,124,000	23,407,000	30,124,000	23,407,000
Commercial and industrial \| Loans acquired with deteriorated credit quality (1)
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	[1]			55,000
Ending Balance	[1]	0		0
Consumer and other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		5,172,000	7,549,000	5,874,000	9,520,000
Charged-off loans		(1,359,000)	(3,296,000)	(10,217,000)	(11,687,000)
Recovery of previously charged-off loans		382,000	270,000	2,159,000	1,663,000
Provision for loan losses		618,000	2,396,000	6,997,000	7,423,000
Ending Balance		4,813,000	6,919,000	4,813,000	6,919,000
Consumer and other \| Loans acquired with deteriorated credit quality (1)
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	[1]			0
Ending Balance	[1]	0		0
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		475,000	1,197,000	1,322,000	874,000
Charged-off loans		0	0	0	0
Recovery of previously charged-off loans		0	0	0	0
Provision for loan losses		347,000	20,000	(500,000)	343,000
Ending Balance		822,000	$ 1,217,000	822,000	$ 1,217,000
Unallocated \| Loans acquired with deteriorated credit quality (1)
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	[1]
Ending Balance	[1]

[1]	(1) Loans acquired with deteriorated credit quality are recorded at fair value at the time of acquisition. An allowance for loan losses is recorded resulting from subsequent credit deterioration.

Loans and Allowance for Loan_12

Loans and Allowance for Loan Losses - Details on Allowance for Loan Losses and Recorded Investment by Loan Classification and Impairment Evaluation Method (Details) - USD ($)		Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		$ 76,774,000		$ 63,147,000
Individually evaluated for impairment		2,378,000		2,198,000
Total allowance for loan losses		79,985,000	$ 75,670,000	67,240,000	$ 65,159,000	$ 61,944,000	$ 58,980,000
Collectively evaluated for impairment		17,346,542,000		15,531,482,000
Individually evaluated for impairment		83,861,000		58,979,000
Loans		17,464,009,000		15,633,116,000
Loans acquired with deteriorated credit quality (1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	11,000		573,000
Loans acquired with deteriorated credit quality		33,606,000		42,655,000
Commercial real estate - mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		26,047,000		20,753,000
Individually evaluated for impairment		461,000		95,000
Total allowance for loan losses		26,517,000	24,848,000	21,188,000	20,790,000	16,002,000	13,655,000
Collectively evaluated for impairment		7,164,591,000		6,630,593,000
Individually evaluated for impairment		31,739,000		18,214,000
Loans		7,215,119,000		6,669,610,000
Commercial real estate - mortgage \| Loans acquired with deteriorated credit quality (1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	9,000		340,000
Loans acquired with deteriorated credit quality		18,789,000		20,803,000
Consumer real estate - mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		6,235,000		4,460,000
Individually evaluated for impairment		490,000		410,000
Total allowance for loan losses		6,727,000	5,853,000	5,031,000	5,303,000	7,835,000	6,564,000
Collectively evaluated for impairment		2,783,196,000		2,534,996,000
Individually evaluated for impairment		22,128,000		12,172,000
Loans		2,815,160,000		2,561,214,000
Consumer real estate - mortgage \| Loans acquired with deteriorated credit quality (1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	2,000		161,000
Loans acquired with deteriorated credit quality		9,836,000		14,046,000
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		10,967,000		8,879,000
Individually evaluated for impairment		15,000		66,000
Total allowance for loan losses		10,982,000	10,984,000	8,962,000	7,523,000	5,126,000	3,624,000
Collectively evaluated for impairment		2,051,413,000		1,896,553,000
Individually evaluated for impairment		3,447,000		5,167,000
Loans		2,059,009,000		1,908,288,000
Construction and land development \| Loans acquired with deteriorated credit quality (1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	0		17,000
Loans acquired with deteriorated credit quality		4,149,000		6,568,000
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		28,859,000		23,181,000
Individually evaluated for impairment		1,265,000		1,627,000
Total allowance for loan losses		30,124,000	28,338,000	24,863,000	23,407,000	24,235,000	24,743,000
Collectively evaluated for impairment		4,979,829,000		4,116,677,000
Individually evaluated for impairment		25,586,000		23,426,000
Loans		5,006,247,000		4,141,341,000
Commercial and industrial \| Loans acquired with deteriorated credit quality (1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	0		55,000
Loans acquired with deteriorated credit quality		832,000		1,238,000
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment		4,666,000		5,874,000
Individually evaluated for impairment		147,000		0
Total allowance for loan losses		4,813,000	5,172,000	5,874,000	6,919,000	7,549,000	9,520,000
Collectively evaluated for impairment		367,513,000		352,663,000
Individually evaluated for impairment		961,000		0
Loans		368,474,000		352,663,000
Consumer and other \| Loans acquired with deteriorated credit quality (1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]	0		0
Loans acquired with deteriorated credit quality		0		0
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collectively evaluated for impairment
Individually evaluated for impairment
Total allowance for loan losses		822,000	$ 475,000	1,322,000	$ 1,217,000	$ 1,197,000	$ 874,000
Unallocated \| Loans acquired with deteriorated credit quality (1)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total allowance for loan losses	[1]

[1]	(1) Loans acquired with deteriorated credit quality are recorded at fair value at the time of acquisition. An allowance for loan losses is recorded resulting from subsequent credit deterioration.

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
Income Taxes - Narrative (Details) - USD ($)	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 2,800,000	$ 1,300,000	$ 2,800,000	$ 1,300,000
Interest and penalties	$ 0	$ 0	$ 0	$ 22,000
Effective income tax rate (as percent)	20.70%	35.20%	20.30%	31.90%
Federal and State income tax statutory rate (as percent)			26.14%	39.23%
Excess tax benefit	$ 199,000	$ 59,000	$ 3,000,000	$ 4,600,000

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Details) - USD ($)	9 Months Ended	12 Months Ended
Commitments and Contingent Liabilities (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Expiry period of standby letter of credit, maximum	2 years
Accrual for inherent risks associated with commitments	$ 2,900,000	$ 3,100,000
Commitments
Loss Contingencies [Line Items]
Amount of commitment	6,460,000,000
Home Equity Line of Credit [Member]
Loss Contingencies [Line Items]
Amount of commitment	949,900,000
Standby letter of credit
Loss Contingencies [Line Items]
Amount of commitment	$ 177,800,000

Stock Options and Restricted _3

Stock Options and Restricted Shares - Narrative (Details) - USD ($)	Jul. 31, 2015	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		1,683,000		1,683,000
Stock-based compensation expense		$ 4,500,000	$ 5,800,000	$ 13,254,000	$ 14,412,000
Remaining Share-Based Compensation on Unvested Restricted Stock Awards		$ 35,700,000		$ 35,700,000
Weighted Average Remaining Period of Sharebased Compensation Expense				2 years 10 months 24 days
2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		500,000		500,000
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		1,200,000		1,200,000
BNC Bancorp 2013 Omnibus Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		9,000		9,000
Plans other than 2018 Omnibus Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		0		0
CapitalMark Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		0		0
Shares acquired in period (in shares)	858,000
Magna, Avenue or BNC
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuances (in shares)		0		0

Stock Options and Restricted _4

Stock Options and Restricted Shares - Common Stock Options (Details) - Common stock options and stock appreciation rights - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2018		Dec. 31, 2017
Number
Outstanding, beginning balance (in shares)		274,586
Granted (in shares)		0
Exercised (in shares)		(90,497)
Forfeited (in shares)		0
Outstanding, ending balance (in shares)		184,089		274,586
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)		$ 21.40
Outstanding, ending balance (in dollars per share)		$ 22.67		$ 21.40
Additional disclosures
Options exercisable (in shares)		184,089
Weighted- average exercise price of options exercisable (in dollars per share)		$ 22.67
Weighted-average contractual remaining term for options outstanding		3 years 6 months 15 days		3 years 22 days
Weighted-average contractual remaining term for options exercisable		3 years 6 months 15 days
Aggregate intrinsic value		$ 6,900	[1]	$ 12,329	[2]
Aggregate intrinsic value of options exercisable	[1]	$ 6,900
Quoted closing price of common stock (in dollars per share)		$ 60.15		$ 66.3
Number of awards used in aggregate intrinsic value (in shares)		184,089		274,586

[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 $60.15 per common share at September 30, 2018 for the 184,089 options that were in-the-money at September 30, 2018.
[2]	The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of Pinnacle Financial common stock of $66.30 per common share at December 31, 2017 for the 274,586 options that were in-the-money at December 31, 2017.

Stock Options and Restricted _5

Stock Options and Restricted Shares - Unvested Restricted Awards (Details) - Restricted stock	9 Months Ended
	Sep. 30, 2018$ / sharesshares
Number
Unvested, beginning of period (in shares)	936,135
Shares awarded (in shares)	160,638
Conversion of previously awarded restricted share units to restricted share awards (in shares)	6,200
Restrictions lapsed and shares released to associates/directors (in shares)	(352,595)
Shares forfeited (in shares)	(25,547)	[1]
Unvested, end of period (in shares)	724,831
Grant Date Weighted-Average Cost
Unvested, beginning of period (in dollars per share) \| $ / shares	$ 50.08
Unvested, end of period (in dollars per share) \| $ / shares	$ 55.77
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, 2018shares
2018 Restricted granted shares \| Named Executive Officers (NEOs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded	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	145,339	[1]
2018 Restricted granted shares \| Leadership team
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded	25,990
2017 Restricted granted shares \| Named Executive Officers (NEOs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded	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	109,339	[1]
2017 Restricted granted shares \| Leadership team
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded	24,916
Time Based Awards \| Associates
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded	127,789	[2],[3]
Restrictions Lapsed and shares released to participants	224	[2],[3]
Shares Forfeited by participants	2,783	[2],[3],[4]
Shares Unvested	124,782	[2],[3]
Time Based Awards \| Associates \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period in years	3 years	[2],[3]
Time Based Awards \| Associates \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period in years	5 years	[2],[3]
Time Based Awards \| BNC Bancorp \| Associates
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded	16,777	[2],[5]
Restrictions Lapsed and shares released to participants	0	[2],[5]
Shares Forfeited by participants	500	[2],[3],[4],[5]
Shares Unvested	16,277	[2],[5]
Time Based Awards \| BNC Bancorp \| Associates \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period in years	3 years	[2],[5]
Time Based Awards \| BNC Bancorp \| Associates \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period in years	5 years	[2],[5]
Performance Based Awards \| Leadership team
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period in years	3 years	[2],[6]
Shares awarded	6,200	[2],[6]
Restrictions Lapsed and shares released to participants	4,340	[2],[6]
Shares Forfeited by participants	1,860	[2],[4],[6]
Shares Unvested	0	[2],[6]
Outside Director Awards \| Outside directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period in years	1 year	[2],[7]
Shares awarded	16,072	[2],[7]
Restrictions Lapsed and shares released to participants	1,148	[2],[7]
Shares Forfeited by participants	0	[2],[4],[7]
Shares Unvested	14,924	[2],[7]

[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]	Groups include employees (referred to as associates above), the leadership team which includes our named executive officers and other key senior leadership members, 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 and time-based vesting awards to Pinnacle Financial's executive officers, dividends are placed into escrow until the forfeiture restrictions on such shares lapse.
[3]	The forfeiture restrictions on these restricted share awards lapse in equal annual installments on the anniversary date of the grant.
[4]	These shares represent forfeitures resulting from recipients whose employment or board membership is terminated during the year-to-date period ended September 30, 2018 or for which the performance criteria applicable to the award are not achieved. 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.
[5]	Restricted share awards issued to associates that were former associates of BNC pursuant to legacy BNC incentive plans assumed by Pinnacle Financial.
[6]	Reflects conversion of restricted share units issued in prior years to restricted share awards. The forfeiture restrictions on these restricted share awards lapse in separate equal installments should Pinnacle Financial achieve certain soundness targets over each year of the subsequent vesting period. See further details of these awards under the caption "Restricted Share Units" below.
[7]	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, 2019 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, 2018shares
2018 Restricted granted shares \| Tranche 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	3 years
2018 Restricted granted shares \| Tranche 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	2 years
2018 Restricted granted shares \| Tranche 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	1 year
2018 Restricted granted shares \| Named Executive Officers (NEOs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	96,878	[1]
2018 Restricted granted shares \| Named Executive Officers (NEOs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	145,339	[1]
2018 Restricted granted shares \| Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	25,990
2017 Restricted granted shares \| Tranche 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	3 years
2017 Restricted granted shares \| Tranche 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	2 years
2017 Restricted granted shares \| Tranche 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	1 year
2017 Restricted granted shares \| Named Executive Officers (NEOs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	72,537	[1]
2017 Restricted granted shares \| Named Executive Officers (NEOs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	109,339	[1]
2017 Restricted granted shares \| Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	24,916
2016 Restricted granted shares \| Tranche 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	3 years
2016 Restricted granted shares \| Tranche 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	2 years
2016 Restricted granted shares \| Tranche 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	1 year
2016 Restricted granted shares \| Named Executive Officers (NEOs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	73,474	[1]
2016 Restricted granted shares \| Named Executive Officers (NEOs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	110,223	[1]
2016 Restricted granted shares \| Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	26,683
2015 Restricted granted shares \| Tranche 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	3 years
2015 Restricted granted shares \| Tranche 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	2 years
2015 Restricted granted shares \| Tranche 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period per tranche (in years)	2 years
Subsequent holding period per tranche (in years)	1 year
2015 Restricted granted shares \| Named Executive Officers (NEOs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	58,200	[1]
2015 Restricted granted shares \| Named Executive Officers (NEOs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	101,850	[1]
2015 Restricted granted shares \| Leadership Team other than NEOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded (in shares)	28,378

[1]	The named executive officers are awarded a range of awards that may be earned based on attainment of goals between a target level of performance and a maximum level of performance.

Derivative Instruments - Non-he

Derivative Instruments - Non-hedge Derivatives (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Oct. 24, 2018	Oct. 23, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional Amount					$ 101,000,000	$ 176,800,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement			Other noninterest income
Derivative, Gain (Loss) on Derivative, Net	$ (8,000)	$ 7,000	$ (42,000)	$ 20,000
Notional Amount	1,945,632,000		1,945,632,000				$ 1,497,250,000
Estimated Fair Value	(137,000)		(137,000)				(95,000)
Not Designated as Hedging Instrument \| Pay fixed / receive variable swaps
Derivative [Line Items]
Notional Amount	972,816,000		972,816,000				748,625,000
Estimated Fair Value	24,592,000		24,592,000				13,771,000
Not Designated as Hedging Instrument \| Pay variable / receive fixed swaps
Derivative [Line Items]
Notional Amount	972,816,000		972,816,000				748,625,000
Estimated Fair Value	(28,436,000)		(28,436,000)				(13,866,000)
Not Designated as Hedging Instrument \| Cash Settlements [Member]
Derivative [Line Items]
Notional Amount	0		0				0
Estimated Fair Value	$ 3,707,000		$ 3,707,000				$ 0

Derivative Instruments - Hedge

Derivative Instruments - Hedge Derivatives (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Oct. 24, 2018	Oct. 23, 2018	Dec. 31, 2017
Derivative [Line Items]
Closed Portfolio and Beneficial Interest, Last-of-Layer, Amortized Cost		$ 2,800,000,000		$ 2,800,000,000
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)				$ 1,000,000
Notional Amount						$ 101,000,000	$ 176,800,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement				Other noninterest income
Derivative, Gain (Loss) on Derivative, Net		(8,000)	$ 7,000	$ (42,000)	$ 20,000
Notional Amount		1,945,632,000		1,945,632,000				$ 1,497,250,000
Hedging derivative \| Cash flow hedge
Derivative [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)		$ 783,000	239,000	$ 3,453,000	1,307,000
Hedging derivative \| Fair value hedge
Derivative [Line Items]
Weighted Average Remaining Maturity				3 years 6 months 4 days
Pay Rate (as percent)		2.79%		2.79%
Forecasted Notional Amount		$ 1,054,145,000		$ 1,054,145,000				0
Fair Value Hedge Assets		$ 5,349,000		$ 5,349,000				0
Hedging derivative \| Fair value hedge \| Loans
Derivative [Line Items]
Weighted Average Remaining Maturity				2 years 10 months 21 days
Pay Rate (as percent)		2.77%		2.77%
Receive Rate				3 month LIBOR
Forecasted Notional Amount		$ 900,000,000		$ 900,000,000				0
Fair Value Hedge Assets		3,358,000		3,358,000				0
Derivative Instruments and Hedges, Assets	[1]	896,642,000		896,642,000				0
Fair Value Hedging Adjustment	[1]	(3,358,000)		$ (3,358,000)				0
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement				Interest income on loans
Description of Location of Interest Rate Fair Value Hedge Derivative on Balance Sheet				Other assets
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge		(2,236,000)	0	$ (3,358,000)	0
Gain (Loss) on Fair Value Hedges Recognized in Earnings		$ 2,236,000	0	$ 3,358,000	0
Hedging derivative \| Fair value hedge \| Securities
Derivative [Line Items]
Weighted Average Remaining Maturity				7 years 1 month 21 days
Pay Rate (as percent)		2.89%		2.89%
Receive Rate				3 month LIBOR
Forecasted Notional Amount		$ 154,145,000		$ 154,145,000				0
Fair Value Hedge Assets		1,991,000		1,991,000				0
Derivative Instruments and Hedges, Assets		147,155,000		147,155,000				0
Fair Value Hedging Adjustment		(1,991,000)		$ (1,991,000)				0
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement				Interest income on securities
Description of Location of Interest Rate Fair Value Hedge Derivative on Balance Sheet				Other assets
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge		(1,755,000)	0	$ (1,991,000)	0
Gain (Loss) on Fair Value Hedges Recognized in Earnings		$ 1,755,000	$ 0	$ 1,991,000	$ 0
Asset derivatives \| Hedging derivative \| Cash flow hedge
Derivative [Line Items]
Description of Location of Interest Rate Derivatives on Balance Sheet				Other assets
Weighted Average Remaining Maturity				2 years 6 months 4 days
Pay Rate (as percent)		2.61%		2.61%
Receive Rate				3 month LIBOR
Forecasted Notional Amount		$ 134,000,000		$ 134,000,000				0
Cash Flow Hedges Derivative Instruments at Fair Value, Net		$ 982,000		$ 982,000				0
Liability derivatives \| Hedging derivative \| Cash flow hedge
Derivative [Line Items]
Description of Location of Interest Rate Derivatives on Balance Sheet				Other assets
Weighted Average Remaining Maturity				3 years 10 months 21 days
Pay Rate (as percent)		3.14%		3.14%
Receive Rate				3 month LIBOR
Forecasted Notional Amount		$ 66,000,000		$ 66,000,000				200,000,000
Cash Flow Hedges Derivative Instruments at Fair Value, Net		$ (311,000)		$ (311,000)				$ (4,583,000)

[1]	The carrying amount as shown represents the designated last-of-layer. At September 30, 2018, the total amortized cost basis of the closed portfolio of loans designated in these hedging relationships was $2.8 billion.

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2018		Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Valuation allowance		$ 2,378		$ 2,198
Recurring
Assets, Fair Value Disclosure [Abstract]
U.S. Treasury securities		30,528		30,445
U.S. government agency securities		63,185		180,801
Mortgage-backed securities		1,294,545		1,263,819
State and municipal securities		1,212,271		784,612
Agency-backed securities		334,658		173,292
Corporate notes and other		69,395		82,314
Total investment securities available-for-sale		3,004,582		2,515,283
Other Investments		49,351		53,796
Other assets		34,700		11,812
Total assets at fair value		3,088,633		2,580,891
Liabilities at fair value: [Abstract]
Other liabilities		26,727		13,886
Total liabilities at fair value		26,727		13,886
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		30,528		30,445
U.S. government agency securities		63,185		180,801
Mortgage-backed securities		1,294,545		1,263,819
State and municipal securities		1,196,917		767,583
Agency-backed securities		334,658		173,292
Corporate notes and other		69,395		82,314
Total investment securities available-for-sale		2,989,228		2,498,254
Other Investments		24,169		24,922
Other assets		34,700		11,812
Total assets at fair value		3,048,097		2,534,988
Liabilities at fair value: [Abstract]
Other liabilities		26,727		13,886
Total liabilities at fair value		26,727		13,886
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		15,354		17,029
Agency-backed securities		0		0
Corporate notes and other		0		0
Total investment securities available-for-sale		15,354		17,029
Other Investments		25,182		28,874
Other assets		0		0
Total assets at fair value		40,536		45,903
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		51,549		50,554
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Total losses on impaired loans, net		(133)	[1]	(4)
Gain loss on Other real estate owned		259		203
Nonaccrual loans, net	[1]	34,082		22,723
Other real estate owned		17,467		27,831
Total gains (losses) for the year-to-date period then ended		126		199
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]
Nonaccrual loans, net	[1]	0		0
Other real estate owned		0		0
Nonrecurring \| Models with significant observable market parameters (Level 2)
Assets, Fair Value Disclosure [Abstract]
Total assets at fair value		0		0
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Nonaccrual loans, net	[1]	0		0
Other real estate owned		0		0
Nonrecurring \| Models with significant unobservable market parameters (Level 3)
Assets, Fair Value Disclosure [Abstract]
Total assets at fair value		51,549		50,554
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract]
Nonaccrual loans, net	[1]	34,082		22,723
Other real estate owned		$ 17,467		$ 27,831

[1]	Amount is net of valuation allowance of $2.4 million and $2.2 million at September 30, 2018 and December 31, 2017, respectively, as required by ASC 310-10, "Receivables."

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Rollforward of Balance Sheet Amounts Within Level 3 Valuation Hierarchy (Details) - Recurring - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other assets
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward]
Fair value, beginning of period	$ 23,578	$ 27,850	$ 28,874	$ 10,478
Total realized gains included in income	81	188	2,858	625
Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at September 30	0	0	0	0
Acquired	0	0	0	17,062
Purchases	2,455	815	7,273	1,584
Issuances	0	0	0	0
Settlements	(932)	(376)	(1,657)	(1,272)
Transfers out of Level 3	0	0	(12,166)	0
Fair value, end of period	25,182	28,477	25,182	28,477
Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at September 30	81	188	2,858	625
Available-for-sale Securities
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward]
Fair value, beginning of period	15,290	0	17,029	0
Total realized gains included in income	30	0	90	0
Changes in unrealized gains/losses included in other comprehensive income for assets and liabilities still held at September 30	34	0	(597)	0
Acquired	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	(1,168)	0
Transfers out of Level 3	0	0	0	0
Fair value, end of period	15,354	0	15,354	0
Total realized gains included in income related to financial assets and liabilities still on the consolidated balance sheet at September 30	$ 30	$ 0	$ 90	$ 0

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($)		9 Months Ended	12 Months Ended
		Sep. 30, 2018	Dec. 31, 2017
Financial assets:
Securities held-to-maturity		$ 192,500,000	$ 20,830,000
Quoted market prices in an active market (Level 1)
Financial assets:
Securities held-to-maturity		0	0
Loans, net		0	0
Consumer loans held-for-sale		0	0
Commercial loans held-for-sale		0	0
Financial liabilities:
Deposits and securities sold under agreements to repurchase		0	0
Federal Home Loan Bank advances		0	0
Subordinated debt and other borrowings		0	0
Off-balance sheet instruments:
Commitments to extend credit	[1]	0	0
Standby letters of credit	[2]	0	0
Models with significant observable market parameters (Level 2)
Financial assets:
Securities held-to-maturity		192,500,000	20,830,000
Loans, net		0	0
Consumer loans held-for-sale		47,957,000	104,986,000
Commercial loans held-for-sale		11,532,000	25,761,000
Financial liabilities:
Deposits and securities sold under agreements to repurchase		0	0
Federal Home Loan Bank advances		0	0
Subordinated debt and other borrowings		0	0
Off-balance sheet instruments:
Commitments to extend credit	[1]	0	0
Standby letters of credit	[2]	0	0
Models with significant unobservable market parameters (Level 3)
Financial assets:
Securities held-to-maturity		0	0
Loans, net		17,201,694,000	15,252,953,000
Consumer loans held-for-sale		0	0
Commercial loans held-for-sale		0	0
Financial liabilities:
Deposits and securities sold under agreements to repurchase		17,935,256,000	16,516,342,000
Federal Home Loan Bank advances		1,481,374,000	1,313,311,000
Subordinated debt and other borrowings		439,369,000	445,098,000
Off-balance sheet instruments:
Commitments to extend credit	[1]	1,673,000	2,264,000
Standby letters of credit	[2]	1,191,000	800,000
Carrying/ Notional Amount
Financial assets:
Securities held-to-maturity		194,997,000	20,762,000
Loans, net		17,384,024,000	15,565,876,000
Consumer loans held-for-sale		47,417,000	103,729,000
Commercial loans held-for-sale		11,402,000	25,456,000
Financial liabilities:
Deposits and securities sold under agreements to repurchase		18,537,732,000	16,586,964,000
Federal Home Loan Bank advances		1,520,603,000	1,319,909,000
Subordinated debt and other borrowings		465,487,000	465,505,000
Off-balance sheet instruments:
Commitments to extend credit	[1]	6,455,039,000	5,788,425,000
Standby letters of credit	[2]	177,796,000	143,684,000
Estimated Fair Value
Financial assets:
Securities held-to-maturity	[3]	192,500,000	20,830,000
Loans, net	[3]	17,201,694,000	15,252,953,000
Consumer loans held-for-sale	[3]	47,957,000	104,986,000
Commercial loans held-for-sale	[3]	11,532,000	25,761,000
Financial liabilities:
Deposits and securities sold under agreements to repurchase	[3]	17,935,256,000	16,516,342,000
Federal Home Loan Bank advances	[3]	1,481,374,000	1,313,311,000
Subordinated debt and other borrowings	[3]	439,369,000	445,098,000
Off-balance sheet instruments:
Commitments to extend credit	[1],[3]	1,673,000	2,264,000
Standby letters of credit	[2],[3]	1,191,000	800,000
Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gain loss on Other real estate owned		$ 259,000	$ 203,000

[1]	At the end of each quarter, Pinnacle Financial evaluates the inherent risks of the outstanding off-balance sheet commitments. In making this evaluation, Pinnacle Financial evaluates the credit worthiness of the borrower, the collateral supporting the commitments and any other factors similar to those used to evaluate the inherent risks of our loan portfolio. Additionally, Pinnacle Financial evaluates the probability that the outstanding commitment will eventually become a funded loan. As a result, at September 30, 2018 and December 31, 2017, Pinnacle Financial included in other liabilities $1.7 million and $2.3 million, respectively, representing the inherent risks associated with these off-balance sheet commitments.
[2]	At September 30, 2018 and December 31, 2017, the aggregate fair value of Pinnacle Financial's standby letters of credit was $1.2 million and $800,000, respectively. These amounts represent the unamortized fee associated with these standby letters of credit and are included in the consolidated balance sheets of Pinnacle Financial and are believed to approximate fair value. These fair values will decrease over time as the existing standby letters of credit approach their expiration dates.
[3]	Estimated fair values are consistent with an exit-price concept. The assumptions used to estimate the fair values are intended to approximate those that a market-participant would realize in a hypothetical orderly transaction.

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
		Sep. 30, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Preceding period of retained earnings used in calculation of dividend payable		2 years
Quarterly common stock dividend (in dollar per share)		$ 0.14
Pinnacle Financial
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid to Pinnacle Financial by Pinnacle Bank		$ 66,000
Actual
Total capital to risk weighted assets		2,508,348	$ 2,266,161
Tier I capital to risk weighted assets		1,955,095	1,725,323
Common Equity Tier I capital to risk weighted assets		1,954,972	1,725,219
Tier I capital to average assets	[1]	$ 1,955,095	$ 1,725,323
Actual
Total capital to risk weighted assets (as percent)		12.10%	12.00%
Tier I capital to risk weighted assets (as percent)		9.40%	9.10%
Common Equity Tier I capital to risk weighted assets (as percent)		9.40%	9.10%
Tier I capital to average assets (as percent)	[1]	8.80%	8.60%
Minimum Capital Requirement
Total capital to risk weighted assets		$ 1,656,444	$ 1,509,496
Tier I capital to risk weighted assets		1,242,333	1,132,122
Common Equity Tier I capital		931,750	849,092
Tier I capital to average assets	[1]	$ 888,029	$ 797,861
Minimum Capital Requirement
Total capital to risk weighted assets (as percent)		8.00%	8.00%
Tier I capital to risk weighted assets (as percent)		6.00%	6.00%
Common Equity Tier I capital to risk weighted assets (as percent)		4.50%	4.50%
Tier I capital to average assets (as percent)	[1]	4.00%	4.00%
Pinnacle Bank
Actual
Total capital to risk weighted assets		$ 2,344,597	$ 2,134,344
Tier I capital to risk weighted assets		2,133,834	1,936,313
Common Equity Tier I capital to risk weighted assets		2,133,711	1,936,209
Tier I capital to average assets	[1]	$ 2,133,834	$ 1,936,313
Actual
Total capital to risk weighted assets (as percent)		11.40%	11.30%
Tier I capital to risk weighted assets (as percent)		10.30%	10.30%
Common Equity Tier I capital to risk weighted assets (as percent)		10.30%	10.30%
Tier I capital to average assets (as percent)	[1]	9.60%	9.70%
Minimum Capital Requirement
Total capital to risk weighted assets		$ 1,650,616	$ 1,504,765
Tier I capital to risk weighted assets		1,237,962	1,128,574
Common Equity Tier I capital		928,471	846,430
Tier I capital to average assets	[1]	$ 885,345	$ 796,235
Minimum Capital Requirement
Total capital to risk weighted assets (as percent)		8.00%	8.00%
Tier I capital to risk weighted assets (as percent)		6.00%	6.00%
Common Equity Tier I capital to risk weighted assets (as percent)		4.50%	4.50%
Tier I capital to average assets (as percent)	[1]	4.00%	4.00%
Minimum To Be Well-Capitalized
Total capital to risk weighted assets		$ 2,063,269	$ 1,880,956
Tier I capital to risk weighted assets		1,650,616	1,504,765
Common Equity Tier I capital to risk weighted assets		1,341,125	1,222,621
Tier I capital to average assets	[1]	$ 1,106,681	$ 995,294
Minimum To Be Well-Capitalized
Total capital to risk weighted assets (as percent)		10.00%	10.00%
Tier I capital to risk weighted assets (as percent)		8.00%	8.00%
Common Equity Tier I capital to risk weighted assets (as percent)		6.50%	6.50%
Tier I capital to average assets (as percent)	[1]	5.00%	5.00%

[1]	(*) Average assets for the above calculations were based on the most recent quarter.

Subordinated Debt and Other b_3

Subordinated Debt and Other borrowings - Narrative (Details)	9 Months Ended
	Sep. 30, 2018USD ($)subsidiary	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Number of wholly owned subsidiaries \| subsidiary	12
Term	30 years
Subordinated debt and other borrowings \| $	$ 465,487,000	$ 465,505,000
Variable rate basis description	LIBOR + 3.128%
BNC Bancorp \| BNC Subordinated Notes Assumed Due October 2023 \| Minimum
Debt Instrument [Line Items]
Interest rate (as percent)	5.50%
BNC Bancorp \| BNC Subordinated Notes Assumed Due October 2023 \| Maximum
Debt Instrument [Line Items]
Interest rate (as percent)	9.50%

Subordinated Debt and Other b_4

Subordinated Debt and Other borrowings (Details)		9 Months Ended
Subordinated Debt and Other borrowings (Details)		Sep. 30, 2018USD ($)subsidiary	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Total Debt Outstanding		$ 465,487,000	$ 465,505,000
Coupon Structure		LIBOR + 3.128%
Debt issuance costs and fair value adjustments		$ (7,918,000)
Number of wholly owned subsidiaries \| subsidiary		12
Term		30 years
Revolving credit facility
Debt Instrument [Line Items]
Date Established		Apr. 26, 2018
Maturity		Apr. 25, 2019
Total Debt Outstanding	[1]	$ 0
Interest Rate (as percent)	[1]	0.00%
Maximum borrowing capacity		$ 75,000,000
Pinnacle Statutory Trust I
Debt Instrument [Line Items]
Date Established		Dec. 29, 2003
Maturity		Dec. 30, 2033
Total Debt Outstanding		$ 10,310,000
Interest Rate (as percent)		5.13%
Coupon Structure		30-day LIBOR + 2.80%
Debt instrument, basis spread on variable rate (as percent)		2.80%
Pinnacle Statutory Trust II
Debt Instrument [Line Items]
Date Established		Sep. 15, 2005
Maturity		Sep. 30, 2035
Total Debt Outstanding		$ 20,619,000
Interest Rate (as percent)		3.80%
Coupon Structure		30-day LIBOR + 1.40%
Debt instrument, basis spread on variable rate (as percent)		1.40%
Pinnacle Statutory Trust III
Debt Instrument [Line Items]
Date Established		Sep. 7, 2006
Maturity		Sep. 30, 2036
Total Debt Outstanding		$ 20,619,000
Interest Rate (as percent)		4.05%
Coupon Structure		30-day LIBOR + 1.65%
Debt instrument, basis spread on variable rate (as percent)		1.65%
Pinnacle Statutory Trust IV
Debt Instrument [Line Items]
Date Established		Oct. 31, 2007
Maturity		Sep. 30, 2037
Total Debt Outstanding		$ 30,928,000
Interest Rate (as percent)		5.18%
Coupon Structure		30-day LIBOR + 2.85%
Debt instrument, basis spread on variable rate (as percent)		2.85%
BNC Capital Trust I
Debt Instrument [Line Items]
Date Established		Apr. 3, 2003
Maturity		Apr. 15, 2033
Total Debt Outstanding		$ 5,155,000
Interest Rate (as percent)		5.59%
Coupon Structure		30-day LIBOR + 3.25%
Debt instrument, basis spread on variable rate (as percent)		3.25%
BNC Capital Trust II
Debt Instrument [Line Items]
Date Established		Mar. 11, 2004
Maturity		Apr. 7, 2034
Total Debt Outstanding		$ 6,186,000
Interest Rate (as percent)		5.19%
Coupon Structure		30-day LIBOR + 2.85%
Debt instrument, basis spread on variable rate (as percent)		2.85%
BNC Capital Trust III
Debt Instrument [Line Items]
Date Established		Sep. 23, 2004
Maturity		Sep. 23, 2034
Total Debt Outstanding		$ 5,155,000
Interest Rate (as percent)		4.74%
Coupon Structure		30-day LIBOR + 2.40%
Debt instrument, basis spread on variable rate (as percent)		2.40%
BNC Capital Trust IV
Debt Instrument [Line Items]
Date Established		Sep. 27, 2006
Maturity		Dec. 31, 2036
Total Debt Outstanding		$ 7,217,000
Interest Rate (as percent)		4.10%
Coupon Structure		30-day LIBOR + 1.70%
Debt instrument, basis spread on variable rate (as percent)		1.70%
Valley Financial Trust I
Debt Instrument [Line Items]
Date Established		Jun. 26, 2003
Maturity		Jun. 26, 2033
Total Debt Outstanding		$ 4,124,000
Interest Rate (as percent)		5.47%
Coupon Structure		30-day LIBOR + 3.10%
Debt instrument, basis spread on variable rate (as percent)		3.10%
Valley Financial Trust II
Debt Instrument [Line Items]
Date Established		Sep. 26, 2005
Maturity		Dec. 15, 2035
Total Debt Outstanding		$ 7,217,000
Interest Rate (as percent)		3.82%
Coupon Structure		30-day LIBOR + 1.49%
Debt instrument, basis spread on variable rate (as percent)		1.49%
Valley Financial Trust III
Debt Instrument [Line Items]
Date Established		Dec. 15, 2006
Maturity		Jan. 30, 2037
Total Debt Outstanding		$ 5,155,000
Interest Rate (as percent)		4.07%
Coupon Structure		30-day LIBOR + 1.73%
Debt instrument, basis spread on variable rate (as percent)		1.73%
Southcoast Capital Trust III
Debt Instrument [Line Items]
Date Established		Jul. 30, 2015
Maturity		Jul. 30, 2025
Total Debt Outstanding	[2]	$ 60,000,000
Interest Rate (as percent)	[2]	4.88%
Coupon Structure		LIBOR + 3.128%
Debt instrument, basis spread on variable rate (as percent)		3.128%
Trust Preferred Securities Subject to Mandatory Redemption Twelve [Member]
Debt Instrument [Line Items]
Date Established		Aug. 5, 2005
Maturity		Sep. 30, 2035
Total Debt Outstanding		$ 10,310,000
Interest Rate (as percent)		3.90%
Coupon Structure		30-day LIBOR + 1.50%
Debt instrument, basis spread on variable rate (as percent)		1.50%
Pinnacle Bank Subordinated Notes
Debt Instrument [Line Items]
Date Established		Mar. 10, 2016
Maturity		Jul. 30, 2025
Total Debt Outstanding	[2]	$ 70,000,000
Interest Rate (as percent)	[2]	4.88%
Coupon Structure		LIBOR + 3.128%
Debt instrument, basis spread on variable rate (as percent)		3.128%
Avenue Subordinated Notes
Debt Instrument [Line Items]
Date Established		Dec. 29, 2014
Maturity		Dec. 29, 2024
Total Debt Outstanding	[3]	$ 20,000,000
Interest Rate (as percent)	[3]	6.75%
Coupon Structure		LIBOR + 4.95%
Debt instrument, basis spread on variable rate (as percent)		4.95%
Debt instrument, term of variable rate		3 months
Pinnacle Financial Subordinated Notes
Debt Instrument [Line Items]
Date Established		Nov. 16, 2016
Maturity		Nov. 16, 2026
Total Debt Outstanding	[4]	$ 120,000,000
Interest Rate (as percent)	[4]	5.25%
Coupon Structure		LIBOR + 3.884%
Debt instrument, basis spread on variable rate (as percent)		3.884%
Debt instrument, term of variable rate		3 months
Townebank Subordinated Notes
Debt Instrument [Line Items]
Date Established		Oct. 15, 2013
Maturity		Oct. 15, 2023
Total Debt Outstanding	[5]	$ 10,410,000
Interest Rate (as percent)	[5]	7.08%
Coupon Structure	[5]	30-day LIBOR + 5.50%
Debt instrument, basis spread on variable rate (as percent)	[5]	5.50%
BNC Subordinated Notes
Debt Instrument [Line Items]
Date Established		Sep. 25, 2014
Maturity		Oct. 1, 2024
Total Debt Outstanding	[6]	$ 60,000,000
Interest Rate (as percent)	[6]	5.50%
Coupon Structure		LIBOR + 3.59%
Debt instrument, basis spread on variable rate (as percent)		3.59%
Debt instrument, term of variable rate		3 months
Minimum \| BNC Bancorp \| BNC Subordinated Notes Assumed Due October 2023
Debt Instrument [Line Items]
Interest Rate (as percent)		5.50%
Maximum \| BNC Bancorp \| BNC Subordinated Notes Assumed Due October 2023
Debt Instrument [Line Items]
Interest Rate (as percent)		9.50%

[1]	Borrowing capacity on the revolving credit facility is $75.0 million. At September 30, 2018, there was no outstanding balance under this facility. An unused fee of 0.35% is assessed on the average daily unused amount of the loan.
[2]	Migrates to three month LIBOR + 3.128% beginning July 30, 2020 through the end of the term.
[3]	Migrates to three month LIBOR + 4.95% beginning January 1, 2020 through the end of the term.
[4]	Migrates to three month LIBOR + 3.884% beginning November 16, 2021 through the end of the term.
[5]	Coupon structure includes a floor of 5.5% and a cap of 9.5%
[6]	Migrates to three month LIBOR + 3.59% beginning October 1, 2019 through the end of the term if not redeemed on that date.