Regulatory Matters (Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Cascade Bancorp
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Actual capital amount Tier 1 leverage (to average assets)	$ 249,431	$ 227,542
Actual capital amount to Tier 1 common (to risk-weighted assets)	249,431	227,542
Actual capital amount Tier 1 capital (to risk-weighted assets)	249,431	227,542
Actual capital amount total capital (to risk-weighted assets)	$ 275,112	$ 252,401
Actual ratio Tier 1 leverage (to average assets)	8.40%	9.40%
Actual ratio Tier 1 common (to risk-weighted assets)	10.40%	11.50%
Actual ratio Tier 1 capital (to risk-weighted assets)	10.40%	11.50%
Actual ratio Total capital (to risk-weighted assets)	11.40%	12.80%
Regulatory minimum to be adequately capitalized capital amount Tier 1 leverage (to average assets)	$ 119,171	$ 96,817
Regulatory minimum to be adequately capitalized capital amount Tier 1 common (to risk-weighted assets)	108,234	88,818
Regulatory minimum to be adequately capitalized capital amount Tier 1capital (to risk-weighted assets)	144,312	118,424
Regulatory minimum to be adequately capitalized total capital (to risk-weighted assets)	$ 192,416	$ 157,898
Regulatory minimum to be adequately capitalized ratio Tier 1 leverage (to average assets)	4.00%	4.00%
Regulatory minimum to be adequately capitalized ratio Tier 1 common (to risk-weighted assets)	4.50%	4.50%
Regulatory minimum to be adequately capitalized ratio Tier 1capital (to risk-weighted assets)	6.00%	6.00%
Regulatory minimum to be adequately capitalized ratio Total capital (to risk-weighted assets)	8.00%	8.00%
Minimum capital adequacy with capital buffer amount Tier 1 common (to risk-weighted assets)	$ 122,665
Minimum capital adequacy with capital buffer amount Tier 1 capital (to risk-weighted assets)	158,743
Minimum capital adequacy with capital buffer amount Total capital (to risk-weighted assets)	$ 206,847
Minimum capital adequacy with capital buffer ratio Tier 1 common (to risk-weighted assets)	5.10%
Minimum capital adequacy with capital buffer ratio Tier 1 capital (to risk-weighted assets)	6.60%
Minimum capital adequacy with capital butter ratio Total capital (to risk-weighted assets)	8.60%
Regulatory minimum to be well capitalized under prompt corrective action provisions capital amount Tier 1 leverage (to average assets)	$ 148,964	$ 121,022
Regulatory minimum to be well capitalized under prompt corrective action provisions common equity Tier 1 (to risk-weighted assets)	156,338	128,292
Regulatory minimum to be well capitalized under prompt corrective action provisions capital amount Tier 1 capital (to risk-weighted assets)	192,416	157,898
Regulatory minimum to be well capitalized under prompt corrective action provisions total capital amount (to risk-weighted assets)	$ 240,520	$ 197,373
Regulatory minimum to be well capitalized under prompt corrective action provisions capital ratio Tier 1 leverage (to average assets)	5.00%	5.00%
Regulatory minimum to be well capitalized under prompt corrective action provisions capital ratio Tier 1 common (to risk-weighted assets)	6.50%	6.50%
Regulatory minimum to be well capitalized under prompt corrective action provisions capital ratio Tier 1 capital (to risk-weighted assets)	8.00%	8.00%
Regulatory minimum to be well capitalized under prompt corrective action provisions total capital ratio (to risk-weighted assets)	10.00%	10.00%
Bank of the Cascades
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Actual capital amount Tier 1 leverage (to average assets)	$ 245,681	$ 223,533
Actual capital amount to Tier 1 common (to risk-weighted assets)	245,681	223,533
Actual capital amount Tier 1 capital (to risk-weighted assets)	245,681	223,533
Actual capital amount total capital (to risk-weighted assets)	$ 271,362	$ 248,346
Actual ratio Tier 1 leverage (to average assets)	8.30%	9.30%
Actual ratio Tier 1 common (to risk-weighted assets)	10.20%	11.40%
Actual ratio Tier 1 capital (to risk-weighted assets)	10.20%	11.40%
Actual ratio Total capital (to risk-weighted assets)	11.30%	12.60%
Regulatory minimum to be adequately capitalized capital amount Tier 1 leverage (to average assets)	$ 119,062	$ 96,662
Regulatory minimum to be adequately capitalized capital amount Tier 1 common (to risk-weighted assets)	108,242	88,663
Regulatory minimum to be adequately capitalized capital amount Tier 1capital (to risk-weighted assets)	144,322	118,218
Regulatory minimum to be adequately capitalized total capital (to risk-weighted assets)	$ 192,430	$ 157,624
Regulatory minimum to be adequately capitalized ratio Tier 1 leverage (to average assets)	4.00%	4.00%
Regulatory minimum to be adequately capitalized ratio Tier 1 common (to risk-weighted assets)	4.50%	4.50%
Regulatory minimum to be adequately capitalized ratio Tier 1capital (to risk-weighted assets)	6.00%	6.00%
Regulatory minimum to be adequately capitalized ratio Total capital (to risk-weighted assets)	8.00%	8.00%
Minimum capital adequacy with capital buffer amount Tier 1 common (to risk-weighted assets)	$ 122,674
Minimum capital adequacy with capital buffer amount Tier 1 capital (to risk-weighted assets)	158,755
Minimum capital adequacy with capital buffer amount Total capital (to risk-weighted assets)	$ 206,862
Minimum capital adequacy with capital buffer ratio Tier 1 common (to risk-weighted assets)	5.10%
Minimum capital adequacy with capital buffer ratio Tier 1 capital (to risk-weighted assets)	6.60%
Minimum capital adequacy with capital butter ratio Total capital (to risk-weighted assets)	8.60%
Regulatory minimum to be well capitalized under prompt corrective action provisions capital amount Tier 1 leverage (to average assets)	$ 148,828	$ 120,827
Regulatory minimum to be well capitalized under prompt corrective action provisions common equity Tier 1 (to risk-weighted assets)	156,349	128,069
Regulatory minimum to be well capitalized under prompt corrective action provisions capital amount Tier 1 capital (to risk-weighted assets)	192,430	157,624
Regulatory minimum to be well capitalized under prompt corrective action provisions total capital amount (to risk-weighted assets)	$ 240,537	$ 197,030
Regulatory minimum to be well capitalized under prompt corrective action provisions capital ratio Tier 1 leverage (to average assets)	5.00%	5.00%
Regulatory minimum to be well capitalized under prompt corrective action provisions capital ratio Tier 1 common (to risk-weighted assets)	6.50%	6.50%
Regulatory minimum to be well capitalized under prompt corrective action provisions capital ratio Tier 1 capital (to risk-weighted assets)	8.00%	8.00%
Regulatory minimum to be well capitalized under prompt corrective action provisions total capital ratio (to risk-weighted assets)	10.00%	10.00%