Fair Value Measurements Schedule of reconciliation of opening and closing balances for fair value measurements categorized within Level 3 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Derivative Financial Instruments, Liabilities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 23,436	$ 0
Additions	0	6,765
Valuation loss for the period	9,901	16,671
Ending balance	33,337	23,436
Contingent Consideration Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	0
Additions	3,686	0
Valuation loss for the period	0	0
Ending balance	$ 3,686	$ 0