Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Statement of Stockholders' Equity [Abstract]

Common stock and additional paid-in capital activity

The following table summarizes the common stock and additional paid-in capital activity during the six months ended June 30, 2018 (in thousands):

Common stock and additional paid-in capital, December 31, 2017	$	91,162
Common stock issued pursuant to stock-based compensation plans, net	4,777
Stock-based compensation	14,406
Repurchase of common stock	(99,957		)
Common stock and additional paid-in capital, June 30, 2018	$	10,388