Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The following table presents the original cost and accumulated amortization of intangible assets (in thousands):

	December 31,
	2012		2011
Core deposit premiums	$	109,417	$	109,417
Less accumulated amortization	107,848		107,023
Net core deposit premiums	1,569		2,394
Other identifiable intangible assets	38,191		17,291
Less accumulated amortization	11,568		9,466
Net other identifiable intangible assets	26,623		7,825
Total intangible assets, net	$	28,192	$	10,219

The net amortized cost of identifiable intangible assets assigned to the Company’s geographic markets as follows (in thousands):

	December 31,
	2012		2011
Core deposit premiums:
Texas	$	1,192	$	1,817
Colorado	377		548
Arizona	—		29
Total core deposit premiums	$	1,569	$	2,394
Other identifiable intangible assets:
Oklahoma	9,857		5,548
Colorado	15,976		1,487
Kansas/Missouri	790		790
Total other identifiable intangible assets	26,623		7,825
Total intangible assets, net	$	28,192	$	10,219

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Expected amortization expense for intangible assets that will continue to be amortized (in thousands):

	Core Deposit Premiums		Other Identifiable Intangible Assets		Total
2013	$	475	$	3,306	$	3,781
2014	432		2,300		2,732
2015	393		2,176		2,569
2016	247		2,064		2,311
2017	22		1,731		1,753
Thereafter	—		15,046		15,046
	$	1,569	$	26,623	$	28,192

Schedule of Goodwill [Table Text Block]

Goodwill assigned to the Company’s geographic markets as follows (in thousands):

	December 31,
	2012		2011
Goodwill:
Oklahoma	$	12,607	$	8,173
Texas	240,122		240,122
New Mexico	15,273		15,273
Colorado	77,555		55,611
Arizona	16,422		16,422
Total goodwill	$	361,979	$	335,601

The changes in the carrying value of goodwill by operating segment for year ended December 31, 2012 is as follows (in thousands):

	Commercial		Consumer			Wealth Management		Total
Balance, December 31, 2011
Goodwill	$	266,728	$	39,251		$	29,850	$	335,829
Accumulated impairment losses	—		(228		)	—		(228		)
	266,728		39,023			29,850		335,601
Goodwill acquired during 2012	4,434		—			21,944		26,378
Balance, December 31, 2012
Goodwill	271,162		39,251			51,794		362,207
Accumulated Impairment	—		(228		)	—		(228		)
	$	271,162	$	39,023		$	51,794	$	361,979