CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) [Abstract]
Net income	$ 11,554	$ 2,544	$ 19,977	$ 4,879
Change in net unrealized gains (losses) on investments available for sale	1,362	(3,512)	2,242	(2,327)
Comprehensive income (loss) before tax	12,916	(968)	22,219	2,552
Income tax (expense) benefit related to items of other comprehensive income (loss)	(414)	1,321	(844)	875
Comprehensive income	$ 12,502	$ 353	$ 21,375	$ 3,427