UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) on available-for-sale securities, taxes	$ 0	$ 11	$ 0	$ (141)
Reclassification adjustment for gains on available-for-sale securities included in net income (net of taxes of $0, $8, $0, $504 respectively)	$ 0	$ 8	$ 0	$ 504