CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 11,665	$ 15,620	$ 35,001	$ 50,194
OTHER COMPREHENSIVE INCOME (LOSS), NET OF INCOME TAXES:
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	1,239	641	(7,615)	476
Income tax benefit (expense) related to AFS unrealized holding gains (losses)	(446)	(225)	2,733	(165)
Reclassification for net (gains) losses on AFS securities realized in earnings	0	9	(116)	38
Income tax benefit (expense) related to net gains (losses) on AFS securities realized in losses	0	(3)	42	(14)
Amortization of unrealized gain on tax exempt securities transferred from available-for-sale to held-to-maturity	0	2	0	7
Other comprehensive income (loss)	793	424	(4,956)	342
COMPREHENSIVE INCOME	$ 12,458	$ 16,044	$ 30,045	$ 50,536