Condensed Consolidated Statements of Changes in Stockholders' Equity - 6 months ended Jun. 30, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Balances at Dec. 31, 2015	$ 421,476	$ 1,513	$ 3,024,461	$ (2,600,776)	$ (3,722)
Balances, in shares at Dec. 31, 2015		151,339
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,899)	$ 0	0	(5,899)	0
Other comprehensive income (loss)	3,439	$ 0	0	0	3,439
Common stock issued under stock-based compensation plans, net (in shares)		1,779
Stock Issued During Period, Shares, New Issues		9,253
Stock Issued During Period, Value, New Issues	73,071	$ 93	72,978	0	0
Common stock issued under stock-based compensation plans, net	4,072	18	4,054	0	0
Balances at Jun. 30, 2016	$ 496,159	$ 1,624	$ 3,101,493	$ (2,606,675)	$ (283)
Balances, in shares at Jun. 30, 2016		162,371