Schedule I - Condensed Financial Information of Registrant (Parent Company Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries	$ 353,482,000	$ 617,500,000	$ 46,519,000