Operating Segments (Financial Results By Operating Segment) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Financial results by operating segment
Net interest income	$ 16,001,000		$ 15,606,000
Provision for loan losses	(986,000)		498,000
Noninterest income	3,025,000		3,537,000
Noninterest expenses	14,107,000		14,388,000
Income (loss) before taxes	5,905,000		4,257,000
Taxes on income	2,214,000		1,868,000
Net income (loss)	3,691,000		2,389,000
Externally generated revenue from investing activities	200,000		200,000
Internally generated loss from fund management	100,000		100,000
Fixed asset expenditures	557,000		343,000
Total loans at period end	1,320,122,000		1,327,215,000		1,270,903,000
Total assets at period end	2,012,053,000		2,091,694,000		1,981,423,000
Total deposits at period end	1,605,906,000		1,677,668,000		1,584,086,000
Oklahoma Banking [Member]
Financial results by operating segment
Net interest income	8,829,000		8,259,000
Provision for loan losses	1,976,000		870,000
Noninterest income	1,700,000		1,767,000
Noninterest expenses	7,059,000		7,371,000
Income (loss) before taxes	1,494,000		1,785,000
Taxes on income	560,000		783,000
Net income (loss)	934,000		1,002,000
Fixed asset expenditures	143,000		12,000
Total loans at period end	754,698,000		628,748,000
Total assets at period end	757,592,000		644,066,000
Total deposits at period end	1,110,199,000		1,210,995,000
Texas Banking [Member]
Financial results by operating segment
Net interest income	4,632,000		5,015,000
Provision for loan losses	(3,932,000)		(294,000)
Noninterest income	296,000		387,000
Noninterest expenses	3,228,000		2,607,000
Income (loss) before taxes	5,632,000		3,089,000
Taxes on income	2,112,000		1,355,000
Net income (loss)	3,520,000		1,734,000
Fixed asset expenditures	20,000
Total loans at period end	372,018,000		495,815,000
Total assets at period end	370,382,000		492,657,000
Total deposits at period end	229,383,000		186,378,000
Kansas Banking [Member]
Financial results by operating segment
Net interest income	2,380,000		2,486,000
Provision for loan losses	999,000		(77,000)
Noninterest income	481,000		465,000
Noninterest expenses	2,628,000		2,895,000
Income (loss) before taxes	(766,000)		133,000
Taxes on income	(287,000)		59,000
Net income (loss)	(479,000)		74,000
Fixed asset expenditures	21,000
Total loans at period end	170,720,000		195,355,000
Total assets at period end	177,111,000		200,781,000
Total deposits at period end	246,998,000		266,345,000
Mortgage Banking [Member]
Financial results by operating segment
Net interest income	147,000		136,000
Provision for loan losses	(29,000)		(1,000)
Noninterest income	417,000		714,000
Noninterest expenses	523,000		562,000
Income (loss) before taxes	70,000		289,000
Taxes on income	26,000		127,000
Net income (loss)	44,000		162,000
Total loans at period end	22,686,000		7,297,000
Total assets at period end	25,804,000		9,924,000
Total deposits at period end	5,622,000		3,569,000
Other Operations [Member]
Financial results by operating segment
Net interest income	13,000	[1]	(290,000)	[2]
Noninterest income	131,000	[1]	204,000	[2]
Noninterest expenses	669,000	[1]	953,000	[2]
Income (loss) before taxes	(525,000)	[1]	(1,039,000)	[2]
Taxes on income	(197,000)	[1]	(456,000)	[2]
Net income (loss)	(328,000)	[1]	(583,000)	[2]
Fixed asset expenditures	373,000		331,000
Total assets at period end	681,164,000		744,266,000
Total deposits at period end	$ 13,704,000		$ 10,381,000

[1] * Includes externally generated revenue of $0.2 million, primarily from investing services, and an internally generated loss of $0.1 million from the funds management unit

[2] * Includes externally generated loss of $0.2 million, primarily from investing services, and an internally generated revenue of $0.1 million from the funds management unit