Other Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Nov. 01, 2014
Subordinated Borrowing [Line Items]
Repayments of subordinated debt, Intermountain Statutory Trust I		$ 8,300
Other borrowings	$ 0	$ 8,248
Subordinated Borrowing, Interest Rate	3.03%
Intermountain Community Bancorp [Member]
Subordinated Borrowing [Line Items]
Business Combination, Purchase Price Allocation, Junior Subordinated Debentures			$ 16,500