Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Apr. 15, 2015	Dec. 31, 2014
Long Lived Assets Held-for-sale [Line Items]
Noncash or Part Non-Cash, Distributions of Stock from Investments to NCI		$ 41,500
Cash and cash equivalents		1,503,257		$ 1,811,014	[1]
Proceeds from Sales of Assets, Investing Activities	[1]	$ 39,284
Sales price of assets sold			$ 48,600
Cash and cash equivalents included in sale of assets			$ 9,300
Other Assets
Long Lived Assets Held-for-sale [Line Items]
Cash and cash equivalents				$ 15,000

[1] Cash and cash equivalents at December 31, 2014 included $15.0 million recognized in assets held-for-sale in conjunction with the SVBIF sale transaction. On April 13, 2015 we received net proceeds of $39.3 million consisting of the sales price of $48.6 million less $9.3 million of cash and cash equivalents held by SVBIF that were sold.