Other Intangible Asset - Estimated Amortization Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Intangible Assets
Intangibles amortization	$ 10,596	$ 7,362	$ 5,803
Estimated amortization expense for the next five years
2017	11,251
2018	11,251
2019	10,729
2020	10,707
2021	$ 10,458
Weighted average remaing life for intangible assets	12 years 1 month 6 days
Amount received from settlement	$ 10,050