Long-Term Debt Details (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Interest	$ 37,542	$ 25,115	$ 16,501
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	73,100
Long-term Debt, Maturities, Repayments of Principal in Year Two	55,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	155,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	371,300
Long-term Debt, Maturities, Repayments of Principal in Year Five	$ 500,000