Comprehensive Income

6 Months Ended

Jun. 30, 2015

Equity [Abstract]

Comprehensive Income

Comprehensive Income

Comprehensive income consists of net income; amortization of the actuarial loss on the defined benefit pension plan; and the increase or decrease in unrealized gains or losses on available-for-sale marketable securities. Comprehensive income totaled $42.5 million and $32.3 million for the three-month periods ended June 30, 2015 and 2014, respectively, and $69.0 million and $56.0 million for the six-month periods ended June 30, 2015 and 2014, respectively.