Goodwill Impairment Charges (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Feb. 29, 2016	Jan. 02, 2015
Goodwill and Patent Impairment Charges [Abstract]
Goodwill											$ 30,100
Share Price	$ 4.29								$ 4.29			$ 3.16	$ 16.72
Estimated Fair Value of the Reporting Unit					$ 252,000					$ 252,000
Estimated Carrying Value of Reporting Unit, Market Capitalization Plus Cost Synergies Approach					344,300					344,300
Assets	$ 296,003				347,901				$ 296,003	347,901
Impairment of Goodwill	$ 0	$ 0	$ 0	$ 0	$ 30,149	$ 0	$ 0	$ 0	$ 0	$ 30,149	$ 0