Stockholders' Equity Matters - Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Thousands											3 Months Ended
	Apr. 03, 2017	Feb. 15, 2017	Dec. 30, 2016	Oct. 31, 2016	Sep. 30, 2016	Jul. 27, 2016	Jun. 24, 2016	May 25, 2016	Mar. 21, 2016	Feb. 17, 2016	Mar. 31, 2017	Mar. 31, 2016
Equity [Abstract]
Dividends Declared per Common Share (in dollars per share)		$ 0.55		$ 0.55		$ 0.485		$ 0.4850		$ 0.4850	$ 0.5504	$ 0.4853
Dividends, Common Stock	$ 145,235		$ 145,006		$ 127,737		$ 127,469		$ 102,651		$ 145,427	$ 103,088