Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	$ 4,500	$ 8,400
Estimated undistributed earnings from non-United States subsidiaries	23,700
Valuation allowance	19,171	21,912
Unrecognized Tax Benefits, that Would Not Impact Effective Tax Rate	21,500
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	17,300	16,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	200	600	$ 800
Investor [Member]
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	13,300	12,700
Unrecognized Tax Benefits, that Would Not Impact Effective Tax Rate		21,500
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	181,400	195,500
Operating loss carryforwards, subject to expiration	20,000
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	251,100	289,400
Operating loss carryforwards, subject to expiration	87,900
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	12,800	$ 15,300
Capital and Net Operating Losses Expected to Expire [Member]
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	2,700
FAFC [Member]
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 23,700