Long-term Funding, Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Maturities of Long-term Debt [Abstract]
2016	$ 430,317
2017	27
2018	1,500,000
2019	499,617
2020	172
Thereafter	249,217
Total long-term funding	$ 2,679,350	$ 3,930,117