Consolidated Statements of Stockholders' Equity - 6 months ended Jun. 30, 2016 - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional paid-in capital	Treasury Stock	Accumulated other comprehensive income (loss)	Accumulated deficit	Total
Stockholders' equity, beginning balance at Dec. 31, 2015	$ 2	$ 505,603	$ (30,767)	$ (91)	$ (395,627)	$ 79,120
Common stock shares outstanding, beginning balance at Dec. 31, 2015	20,154					20,154
Issuance of stock under employee stock awards and other		91				$ 91
Issuance of stock under employee stock awards and other, shares	284
Tax withholdings related to vesting of share-based payments		(994)				(994)
Stock-based compensation		4,679				4,679
Foreign currency translation adjustment				(2)		(2)
Net income					12,558	12,558
Stockholders' equity ending balance at Jun. 30, 2016	$ 2	$ 509,379	$ (30,767)	$ (93)	$ (383,069)	$ 95,452
Common stock shares outstanding, ending balance at Jun. 30, 2016	20,438					20,438