Restricted Cash Balances	12 Months Ended
Restricted Cash Balances	Dec. 31, 2017
Cash and Cash Equivalents [Abstract]
Restricted Cash Balances	Note 4. Restricted Cash Balances Regulation D of the Federal Reserve Act requires that banks maintain reserve balances with the Federal Reserve Bank based principally on the type and amount of their deposits. At our option, Pinnacle Financial maintains additional balances to compensate for clearing and other services. For the years ended December 31, 2017 and 2016, the average daily balance maintained at the Federal Reserve was approximately $229.9 million and $183.1 million, respectively.

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.