Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical)

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]    
Tax benefit from (expense on) other comprehensive income before reclassifications $ 510 $ (20,591)
Tax expense on amounts reclassified from accumulated other comprehensive income 0 (6,386)
Tax benefit from (expense on) other comprehensive income $ 510 $ (26,977)