Subsequent Event (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Subsequent Event [Line Items]
Assets	$ 9,256,436	$ 9,236,910	$ 9,502,281
Loans Receivable, Net	6,334,560	6,101,749
Deposits	6,597,838	6,436,117
Stockholders' Equity Attributable to Parent	1,237,005	1,217,923
Commerce National Bank [Member]
Subsequent Event [Line Items]
Net purchase price	42,900
Assets	242,700
Loans Receivable, Net	146,300
Deposits	211,400
Stockholders' Equity Attributable to Parent	$ 30,100

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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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.

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- Definition

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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