Severance and Other Charges (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Other Income and Expenses [Abstract]
Severance charges			$ (8,800)
Severance recorded in comparative quarter		$ 6,400
Severance and other charges	$ 0	$ 7,090
Accrued severance charges	$ 2,400