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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
NET INCOME $ 2,283 $ 2,935
Other comprehensive income, net of tax:    
Reclassification adjustment for realized (gains) losses on marketable securities included in net income (1) [1] (900) 51
Reclassification adjustment for unrealized losses on marketable securities included in net income, net of income taxes (2) [2] 146
Changes in fair value of marketable securities (3) [3] (22) 296
COMPREHENSIVE INCOME $ 1,361 $ 3,428
[1] Net of deferred income taxes of $(551) and $31, respectively.
[2] Net of deferred income taxes of $0 and $89, respectively.
[3] Net of deferred income taxes of $(15) and $181, respectively.