Basis Of Presentation (Details) (USD $)	0 Months Ended		9 Months Ended
	Jun. 01, 2011	Apr. 26, 2011	Sep. 30, 2011	Oct. 26, 2011
Basis Of Presentation [Line Items]
Number of financial centers			52
Impairments of goodwill and other intangible assets			$ 0
Stock repurchase program number of authorized shares				750,000
Stock repurchase program percentage of outstanding shares				2.40%
Stock repurchase program prior to stock split authorized shares			3
Stock repurchase program prior to stock split period, years			500,000
Stockholders' Equity Note, Stock Split	three-for-two stock split	three-for-two stock split
Stock repurchase program shares required to be repurchased, minimum				0
Abilene [Member]
Basis Of Presentation [Line Items]
Number of financial centers			10
Abilene [Member] | Subsidiary [Member]
Basis Of Presentation [Line Items]
Number of financial centers			7
Cleburne [Member]
Basis Of Presentation [Line Items]
Number of financial centers			2
Stephenville [Member]
Basis Of Presentation [Line Items]
Number of financial centers			2
Stephenville [Member] | Subsidiary [Member]
Basis Of Presentation [Line Items]
Number of financial centers			7
Granbury [Member]
Basis Of Presentation [Line Items]
Number of financial centers			3
San Angelo [Member]
Basis Of Presentation [Line Items]
Number of financial centers			2
San Angelo [Member] | Subsidiary [Member]
Basis Of Presentation [Line Items]
Number of financial centers			7
Weatherford [Member]
Basis Of Presentation [Line Items]
Number of financial centers			3
Mineral Wells [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Hereford [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Sweetwater [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Sweetwater [Member] | Subsidiary [Member]
Basis Of Presentation [Line Items]
Number of financial centers			7
Eastland [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Ranger [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Rising Star [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Cisco [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Southlake [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Aledo [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Willow Park [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Brock [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Alvarado [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Burleson [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Keller [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Trophy Club [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Boyd [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Bridgeport [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Decatur [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Roby [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Trent [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Merkel [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Clyde [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Moran [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Albany [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Midlothian [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Crowley [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Glen Rose [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Odessa [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Odessa [Member] | Subsidiary [Member]
Basis Of Presentation [Line Items]
Number of financial centers			7
Fort Worth [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1
Fort Worth [Member] | Subsidiary [Member]
Basis Of Presentation [Line Items]
Number of financial centers			7
Huntsville [Member]
Basis Of Presentation [Line Items]
Number of financial centers			1