Capital Requirements And Regulatory Agreements (Southwest’s, Stillwater National’s, and Bank of Kansas’ Actual Capital Amounts And Ratios) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Southwest [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital, Actual, Amount	$ 310,867	$ 339,964
Total Capital to risk-weighted assets, Actual, Ratio	21.59%	21.56%
Total Capital, For Capital Adequacy Purposes, Amount	115,194	126,122
Total Capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 Capital, Actual, Amount	292,051	319,665
Tier 1 Capital to risk-weighted assets, Actual, Ratio	20.28%	20.28%
Tier 1 Capital, For Capital Adequacy Purposes, Amount	57,597	63,061
Tier 1 Capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 Leverage, Actual, Amount	292,051	319,665
Tier 1 Leverage to average assets, Actual, Ratio	14.86%	15.01%
Tier 1 Leverage, For Capital Adequacy Purposes, Amount	78,597	85,201
Tier 1 Leverage to average assets, For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Stillwater National [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital, Actual, Amount		269,323
Total Capital to risk-weighted assets, Actual, Ratio		19.55%
Total Capital, To Be Well Capitalized, Amount		137,793
Total Capital to risk-weighted assets, To Be Well Capitalized, Ratio		10.00%
Total Capital, For Capital Adequacy Purposes, Amount		110,234
Total Capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio		8.00%
Tier 1 Capital, Actual, Amount		236,705
Tier 1 Capital to risk-weighted assets, Actual, Ratio		17.18%
Tier 1 Capital, To Be Well Capitalized, Amount		82,676
Tier 1 Capital to risk-weighted assets, To Be Well Capitalized, Ratio		6.00%
Tier 1 Capital, For Capital Adequacy Purposes, Amount		55,117
Tier 1 Capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio		4.00%
Tier 1 Leverage, Actual, Amount		236,705
Tier 1 Leverage to average assets, Actual, Ratio		13.14%
Tier 1 Leverage, To Be Well Capitalized, Amount		90,088
Tier 1 Leverage to average assets, To Be Well Capitalized, Ratio		5.00%
Tier 1 Leverage, For Capital Adequacy Purposes, Amount		72,070
Tier 1 Leverage to average assets, For Capital Adequacy Purposes, Ratio		4.00%
Bank Of Kansas [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital, Actual, Amount		33,356
Total Capital to risk-weighted assets, Actual, Ratio		18.37%
Total Capital, To Be Well Capitalized, Amount		18,161
Total Capital to risk-weighted assets, To Be Well Capitalized, Ratio		10.00%
Total Capital, For Capital Adequacy Purposes, Amount		14,529
Total Capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio		8.00%
Tier 1 Capital, Actual, Amount		31,064
Tier 1 Capital to risk-weighted assets, Actual, Ratio		17.10%
Tier 1 Capital, To Be Well Capitalized, Amount		10,896
Tier 1 Capital to risk-weighted assets, To Be Well Capitalized, Ratio		6.00%
Tier 1 Capital, For Capital Adequacy Purposes, Amount		7,264
Tier 1 Capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio		4.00%
Tier 1 Leverage, Actual, Amount		31,064
Tier 1 Leverage to average assets, Actual, Ratio		10.02%
Tier 1 Leverage, To Be Well Capitalized, Amount		15,506
Tier 1 Leverage to average assets, To Be Well Capitalized, Ratio		5.00%
Tier 1 Leverage, For Capital Adequacy Purposes, Amount		12,405
Tier 1 Leverage to average assets, For Capital Adequacy Purposes, Ratio		4.00%
Bank SNB [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital, Actual, Amount	284,388
Total Capital to risk-weighted assets, Actual, Ratio	19.83%
Total Capital, To Be Well Capitalized, Amount	143,413
Total Capital to risk-weighted assets, To Be Well Capitalized, Ratio	10.00%
Total Capital, For Capital Adequacy Purposes, Amount	114,730
Total Capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio	8.00%
Tier 1 Capital, Actual, Amount	266,132
Tier 1 Capital to risk-weighted assets, Actual, Ratio	18.56%
Tier 1 Capital, To Be Well Capitalized, Amount	86,048
Tier 1 Capital to risk-weighted assets, To Be Well Capitalized, Ratio	6.00%
Tier 1 Capital, For Capital Adequacy Purposes, Amount	57,365
Tier 1 Capital to risk-weighted assets, For Capital Adequacy Purposes, Ratio	4.00%
Tier 1 Leverage, Actual, Amount	266,132
Tier 1 Leverage to average assets, Actual, Ratio	13.62%
Tier 1 Leverage, To Be Well Capitalized, Amount	97,719
Tier 1 Leverage to average assets, To Be Well Capitalized, Ratio	5.00%
Tier 1 Leverage, For Capital Adequacy Purposes, Amount	$ 78,175
Tier 1 Leverage to average assets, For Capital Adequacy Purposes, Ratio	4.00%