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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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Bank deposits belonging to an acquired bank that can be counted on as a stable source of lending funds. These deposits have the following attributes: predictable costs and low sensitivity to interest rates. This intangible asset is usually amortized over its estimated useful life.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Acquisitions (Details) $ in Thousands		9 Months Ended	12 Months Ended
Acquisitions (Details) $ in Thousands	Oct. 17, 2014 item	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)
ACQUISITIONS
Assets		$ 2,415,987	$ 2,196,135
Deposit		1,941,140	1,845,713
Loans And Leases Receivable Net Of Allowance		1,961,748	1,784,123
Stockholders' equity		303,229	288,405	$ 285,964	$ 199,218
Goodwill, initial amount recognized			$ 14,457
SP Bancorp Inc And Its Wholly Owned Subsidiary Share Plus Bank [Member]
ACQUISITIONS
Number of branches \| item	4
Assets				348,700
Deposit				280,500
Loans And Leases Receivable Net Of Allowance				248,200
Stockholders' equity				$ 33,700
Cash paid for entity acquired		46,400
Goodwill, initial amount recognized		14,500
Core deposit intangibles.		$ 3,500
Plano Texas \| SP Bancorp Inc And Its Wholly Owned Subsidiary Share Plus Bank [Member]
ACQUISITIONS
Number of branches \| item	2
Dallas Texas [Member] \| SP Bancorp Inc And Its Wholly Owned Subsidiary Share Plus Bank [Member]
ACQUISITIONS
Number of branches \| item	1
Louisville, Kentucky \| SP Bancorp Inc And Its Wholly Owned Subsidiary Share Plus Bank [Member]
ACQUISITIONS
Number of branches \| item	1