Loans Receivable (Summary Of Changes In Accretable Yields Of Acquired Loans) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Loans Receivable [Line Items]
Balance	$ 470,811	$ 708,571
Acquisition	24,089	146,509
Net transfers from (to) nonaccretable difference to (from) accretable yield	110,802	(178,864)
Accretion	(249,309)	(205,405)
Balance	356,393	470,811
Acquired Impaired Loans [Member]
Loans Receivable [Line Items]
Balance	83,834	82,381
Acquisition	1,190	7,346
Net transfers from (to) nonaccretable difference to (from) accretable yield	22,016	37,687
Accretion	(30,417)	(43,580)
Balance	76,623	83,834
Acquired Performing Loans [Member]
Loans Receivable [Line Items]
Balance	386,977	626,190
Acquisition	22,899	139,163
Net transfers from (to) nonaccretable difference to (from) accretable yield	88,786	(216,551)
Accretion	(218,892)	(161,825)
Balance	$ 279,770	$ 386,977

The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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Current period recognition due to accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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- Definition

Increases in the aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan due to the acquisition of similar loans accounted for as debt securities during the period. This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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- Definition

Change in the estimate of cash flows expected to be collected, after acquisition of a loan, which results in an increase in accretable yield (for example, if actual cash flows are significantly greater than previously expected). This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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