Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 33,104	$ 28,296	$ 25,423
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	2,783	2,529	2,737
Provision for loan losses	4,332	22,790	16,103
Deferred	(9,943)	(8,535)	(733)
Net amortization of debt securities	5,593	7,923	6,210
Amortization of intangible assets	1,905	1,879	999
Gain on sale of investment securities	(1,295)	(1,156)	(1,450)
Mortgage loans originated for sale	(78,335)	(99,499)	(72,449)
Proceeds from mortgage loans sold	88,845	93,737	71,405
Gain on sale of other real estate	(3,363)	(2,225)	(862)
Gain on state tax credits, net	(2,503)	(2,207)	(3,645)
Excess tax benefit of share-based compensation	(222)	(66)	53
Share-based compensation	5,048	2,537	1,466
Valuation adjustment on other real estate	1,443	2,398	4,702
Net accretion of loan discount and indemnification asset	(16,435)	(24,398)	(13,950)
Gain on sale of branches	(1,044)	0	0
Changes in:
Accrued interest receivable	1,179	695	(50)
Accrued interest payable	(303)	(480)	(647)
Prepaid FDIC insurance	2,607	2,933	2,904
Other assets	(12,002)	(6,063)	(2,386)
Other liabilities	7,914	16,285	(8,699)
Net cash provided by operating activities	29,308	37,373	27,131
Cash flows from investing activities:
Cash received from acquisition of Legacy Bank	0	0	8,926
Cash received from acquisition of The First National Bank of Olathe	0	12,544	112,778
Cash Acquired from Acquisition	0	0	42,591
Cash paid in sale of branch, net of cash and cash equivalents received	(67,564)	0	0
Net decrease (increase) in loans	36,169	(107,283)	(85,034)
Net cash proceeds received from FDIC loss share receivable	10,981	91,641	41,415
Proceeds from the sale of debt and equity securities, available for sale	159,604	110,876	84,456
Proceeds from the maturity of debt and equity securities, available for sale	82,641	122,955	164,460
Proceeds from the redemption of other investments	30,632	9,238	6,061
Proceeds from the sale of state tax credits held for sale	16,723	10,606	16,690
Proceeds from the sale of other real estate	19,558	53,850	43,828
Payments for the purchase/origination of:
Available for sale debt and equity securities	(60,732)	(278,163)	(431,374)
Other investments	(29,225)	(8,714)	(1,655)
Payments to Acquire Life Insurance Policies	(20,000)	0	0
State tax credits held for sale	(1,365)	(19,157)	(1,838)
Fixed assets	(1,338)	(4,675)	(910)
Net cash provided by (used in) investing activities	176,084	(6,282)	394
Cash flows from financing activities:
Net increase in noninterest-bearing deposit accounts	(19,719)	101,325	126,953
Net decrease in interest-bearing deposit accounts	(32,876)	(233,828)	(298,933)
Proceeds from Federal Home Loan Bank advances	765,000	173,500	0
Repayments of Federal Home Loan Bank advances	(795,000)	(195,500)	(23,254)
Proceeds from notes payable	0	12,000	0
Repayments of notes payable	(1,200)	(300)	0
Repayments of Subordinated Debt	(2,500)	0	0
Debt issuance costs	0	(45)	0
Net decrease in other borrowings	(22,433)	78,825	33,484
Cash dividends paid on common stock	(3,946)	(3,757)	(3,577)
Excess tax benefit of share-based compensation	222	66	(53)
Payments for the repurchase of preferred stock	0	(35,000)	0
Repurchase of common stock warrants	(1,006)	0	0
Cash dividends paid on preferred stock	0	(1,711)	(1,750)
Issuance of common stock	1	3	32,612
Proceeds from the issuance of equity instruments	2,264	1,558	1,468
Net cash used in financing activities	(111,193)	(102,864)	(133,050)
Net decrease in cash and cash equivalents	94,199	(71,773)	(105,525)
Cash and cash equivalents, beginning of period	116,370	188,143	293,668
Cash and cash equivalents, end of period	210,569	116,370	188,143
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	18,462	22,687	30,429
Cash paid during the period for income taxes	27,133	11,333	21,621
Noncash transactions:
Transfer to other real estate owned in settlement of loans	22,623	26,484	22,913
Sales of other real estate financed	9,244	5,619	5,621
Stock Issued During Period, Value, Conversion of Convertible Securities	$ 20,443	$ 0	$ 0