EQUITY (Details) - USD ($)	1 Months Ended	6 Months Ended		12 Months Ended
	Jan. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Nov. 30, 2017	Jan. 31, 2016
EQUITY
Shares of common stock repurchased		614,247	362,371
Central Pacific Bank
EQUITY
Statutory retained earnings		$ 86,300,000
Common Stock
EQUITY
Up to value of shares repurchased		$ 18,100,000		$ 26,600,000
Shares of common stock repurchased		614,247		864,483
Common Stock | 2016 Repurchase Plan
EQUITY
Up to value of shares repurchased	$ 100,000
Shares of common stock repurchased	1,750
Amount authorized under the Repurchase Plan	$ 30,000,000.0					$ 30,000,000.0
Common Stock | 2017 Repurchase Plan
EQUITY
Amount authorized under the Repurchase Plan					$ 50,000,000.0
Stock repurchase program, remaining authorized repurchase amount		$ 35,400,000