Regulatory Matters (Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Cascade Bancorp
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Actual capital amount Tier 1 leverage (to average assets)	$ 268,576	$ 259,216
Actual capital amount to Tier 1 common (to risk-weighted assets)	268,576	259,216
Actual capital amount Tier 1 capital (to risk-weighted assets)	268,576	259,216
Actual capital amount total capital (to risk-weighted assets)	$ 294,376	$ 284,949
Actual ratio Tier 1 leverage (to average assets)	9.00%	8.60%
Actual ratio Tier 1 common (to risk-weighted assets)	10.90%	10.50%
Actual ratio Tier 1 capital (to risk-weighted assets)	10.90%	10.50%
Actual ratio Total capital (to risk-weighted assets)	11.90%	11.60%
Regulatory minimum to be adequately capitalized capital amount Tier 1 leverage (to average assets)	$ 119,006	$ 120,604
Regulatory minimum to be adequately capitalized capital amount Tier 1 common (to risk-weighted assets)	111,111	110,738
Regulatory minimum to be adequately capitalized capital amount Tier 1capital (to risk-weighted assets)	148,148	147,651
Regulatory minimum to be adequately capitalized total capital (to risk-weighted assets)	$ 197,531	$ 196,868
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)	$ 143,210	$ 125,504
Minimum capital adequacy with capital buffer amount Tier 1 capital (to risk-weighted assets)	180,247	162,416
Minimum capital adequacy with capital buffer amount Total capital (to risk-weighted assets)	$ 229,630	$ 211,633
Minimum capital adequacy with capital buffer ratio Tier 1 common (to risk-weighted assets)	5.80%	5.10%
Minimum capital adequacy with capital buffer ratio Tier 1 capital (to risk-weighted assets)	7.30%	6.60%
Minimum capital adequacy with capital butter ratio Total capital (to risk-weighted assets)	9.30%	8.60%
Regulatory minimum to be well capitalized under prompt corrective action provisions capital amount Tier 1 leverage (to average assets)	$ 148,758	$ 150,754
Regulatory minimum to be well capitalized under prompt corrective action provisions common equity Tier 1 (to risk-weighted assets)	160,494	159,955
Regulatory minimum to be well capitalized under prompt corrective action provisions capital amount Tier 1 capital (to risk-weighted assets)	197,531	196,868
Regulatory minimum to be well capitalized under prompt corrective action provisions total capital amount (to risk-weighted assets)	$ 246,914	$ 246,085
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)	$ 263,389	$ 254,270
Actual capital amount to Tier 1 common (to risk-weighted assets)	263,389	254,270
Actual capital amount Tier 1 capital (to risk-weighted assets)	263,389	254,270
Actual capital amount total capital (to risk-weighted assets)	$ 289,189	$ 280,003
Actual ratio Tier 1 leverage (to average assets)	8.90%	8.40%
Actual ratio Tier 1 common (to risk-weighted assets)	10.60%	10.30%
Actual ratio Tier 1 capital (to risk-weighted assets)	10.60%	10.30%
Actual ratio Total capital (to risk-weighted assets)	11.70%	11.40%
Regulatory minimum to be adequately capitalized capital amount Tier 1 leverage (to average assets)	$ 118,810	$ 120,462
Regulatory minimum to be adequately capitalized capital amount Tier 1 common (to risk-weighted assets)	111,460	110,933
Regulatory minimum to be adequately capitalized capital amount Tier 1capital (to risk-weighted assets)	148,614	147,911
Regulatory minimum to be adequately capitalized total capital (to risk-weighted assets)	$ 198,152	$ 197,214
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)	$ 143,660	$ 125,724
Minimum capital adequacy with capital buffer amount Tier 1 capital (to risk-weighted assets)	180,813	162,702
Minimum capital adequacy with capital buffer amount Total capital (to risk-weighted assets)	$ 230,351	$ 212,005
Minimum capital adequacy with capital buffer ratio Tier 1 common (to risk-weighted assets)	5.80%	5.10%
Minimum capital adequacy with capital buffer ratio Tier 1 capital (to risk-weighted assets)	7.30%	6.60%
Minimum capital adequacy with capital butter ratio Total capital (to risk-weighted assets)	9.30%	8.60%
Regulatory minimum to be well capitalized under prompt corrective action provisions capital amount Tier 1 leverage (to average assets)	$ 148,512	$ 150,578
Regulatory minimum to be well capitalized under prompt corrective action provisions common equity Tier 1 (to risk-weighted assets)	160,998	160,237
Regulatory minimum to be well capitalized under prompt corrective action provisions capital amount Tier 1 capital (to risk-weighted assets)	198,152	197,214
Regulatory minimum to be well capitalized under prompt corrective action provisions total capital amount (to risk-weighted assets)	$ 247,690	$ 246,518
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%