Parent company financial information (Condensed Statements of Income) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income:
Interest income	$ 25,491	$ 24,353	$ 22,739	$ 22,694	$ 20,217	$ 20,841	$ 19,819	$ 19,510	$ 95,277	$ 80,387	$ 67,374
Expenses:
Loss before income taxes and equity in undistributed net losses of subsidiary	10,086	6,504	7,652	3,097	9,445	7,725	7,656	8,266	27,339	33,092	3,915
Credit for income taxes	(4,168)	(2,415)	(2,828)	(1,157)	(3,878)	(2,626)	(2,861)	(3,148)	(10,568)	(12,513)	(178)
Net income	$ 5,918	$ 4,089	$ 4,824	$ 1,940	$ 5,567	$ 5,099	$ 4,795	$ 5,118	16,771	20,579	3,737
Comprehensive income									14,085	19,365	6,608
Cascade Bancorp
Income:
Interest income									5	5	10
Expenses:
Administrative									3,279	2,619	1,347
Other									1,356	378	3,217
Total expenses									4,635	2,997	4,564
Loss before income taxes and equity in undistributed net losses of subsidiary									(4,630)	(2,992)	(4,554)
Credit for income taxes									1,804	1,154	2,053
Gain (loss) before equity in undistributed net losses of subsidiary									(2,826)	(1,838)	(2,501)
Equity in undistributed net income of subsidiary									19,597	22,417	6,238
Net income									16,771	20,579	3,737
Comprehensive income									$ 14,085	$ 19,365	$ 6,608