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Supplemental Cash Flow Disclosures - Non-cash Investing and Financing Activities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash paid during the year for:
Interest	$ 31,597	$ 43,303	$ 63,501
Income taxes	11,641	5,900	2,516
Non-cash investing and financing activities:
ESOP loan reductions	1,600	2,000	2,000
Loans transferred to other real estate owned and repossessed assets	4,979	34,269	11,987
Fair value of loans transferred from held to maturity to available for sale	0	14,235	0
Gross (decrease) increase in market value adjustment to securities available for sale	(874)	7,107	5,088
Transfer of securities from held to maturity to available for sale	$ 0	$ 0	$ 22,433

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Employee stock ownership plan loan reductions.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Value of other real estate transferred from the entity's other real estate in noncash transactions.

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