Annual report pursuant to Section 13 and 15(d)

Statement Of Income (Detail)

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Statement Of Income (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income:                      
Other income                 $ 744 $ 650 $ 744
Interest on borrowings                 2,652 3,033 3,319
Income tax benefit                 (17,120) (12,389) (9,358)
Net income                 34,445 23,438 17,378
Dividends on preferred stock                 400 200 0
Net income available to common stockholders 8,457 9,202 8,231 8,155 6,487 6,035 5,845 4,871 34,045 23,238 17,378
Parent [Member]
                      
Income:                      
Dividends received from subsidiary                 0 800 1,230
Other income                 41 43 42
Total income                 41 843 1,272
Interest on borrowings                 2,213 2,345 2,236
Other operating expenses                 325 291 295
Total expenses                 2,538 2,636 2,531
undistributed earnings of subsidiary                 (2,497) (1,793) (1,259)
Income tax benefit                 (944) (976) (924)
earnings of subsidiary                 (1,553) (817) (335)
Equity in undistributed earnings of subsidiary                 35,998 24,255 17,713
Net income                 34,445 23,438 17,378
Dividends on preferred stock                 400 200 0
Net income available to common stockholders                 $ 34,045 $ 23,238 $ 17,378