Shareholders' Equity (Tables)

9 Months Ended

Sep. 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 nine months ended September 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	9,520
Stock-based compensation	25,015
Repurchase of common stock	(99,957		)
Common stock and additional paid-in capital, September 30, 2018	$	25,740