Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Stockholders' Equity.

Summary of share repurchase activity

		Year ended December 31,			Cumulative
	2018		2017		total (1)
	(in thousands)
Shares of common repurchased		260		505		765
Cost of shares of common stock repurchased	$	5,293	$	8,599	$	13,892

(1) Amounts represent the total shares common stock repurchased under the stock repurchase program through December 31, 2018.