Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net Income (Unaudited)	$ 7,262	$ 2,301	$ 14,230	$ 3,094
Change in unrealized gain (loss) on investments:
Unrealized gain arising during the period	175	285	1,449	267
Reclassification adjustment for realized gains	(9)	(140)	(30)	(293)
Net change in unrealized gain (loss)	166	145	1,419	(26)
Deferred income taxes on above change	(64)	(56)	(547)	10
Total other comprehensive income (loss)	102	89	872	(16)
Comprehensive income	$ 7,364	$ 2,390	$ 15,102	$ 3,078