Goodwill and Other Intangible Assets Finite-lived Intangible Assets Amortization Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Finite-Lived Intangible Assets Amortization Expense [Line Items]
Amortization of Intangible Assets	$ 16,814	$ 16,814	$ 16,814
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	16,800
Finite-Lived Intangible Assets, Amortization Expense, Year Two	16,800
Finite-Lived Intangible Assets, Amortization Expense, Year Three	16,300
Finite-Lived Intangible Assets, Amortization Expense, Year Four	15,600
Finite-Lived Intangible Assets, Amortization Expense, Year Five	15,600
2007 Going private transaction [Member]
Schedule of Finite-Lived Intangible Assets Amortization Expense [Line Items]
Amortization of Intangible Assets	15,648	15,648	15,648
Prior To Two Thousand Seven Going Private Transaction [Member]
Schedule of Finite-Lived Intangible Assets Amortization Expense [Line Items]
Amortization of Intangible Assets	1,166	$ 1,166	$ 1,166
Finite-Lived Intangible Assets, Amortization Expense, Year Three	$ 700