Consolidated Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Net income $ 9,668 $ 45,883 $ 121,146
Other comprehensive gain (loss), net of tax:      
Unrealized gains (losses) on investments (223) (174) 817
Comprehensive income $ 9,445 $ 45,709 $ 121,963