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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Net income $ 3,992 $ 7,039 $ 6,927 $ 12,408
Other comprehensive income, net of tax:        
Reclassification adjustment for realized losses on marketable securities included in net income (1) [1] 51
Reclassification adjustment for unrealized losses on marketable securities included in net income, net of income taxes (2) [2] 185 331
Changes in fair value of marketable securities (3) [3] 1,089 95 1,385 157
COMPREHENSIVE INCOME $ 5,266 $ 7,134 $ 8,694 $ 12,565
[1] Net of deferred income taxes of $0, $0, $31, and $0, respectively.
[2] Net of deferred income taxes of $113, $0, $202, and $0, respectively.
[3] Net of deferred income taxes of $667, $58, $848, and $96, respectively.