Related Party Transactions - Narrative (Details) - USD ($) $ in Millions		1 Months Ended
	Sep. 03, 2009	Aug. 31, 2016
Related Party Transaction [Line Items]
Aggregate purchase price of aircraft	$ 8.3
Cash paid on sale of aircraft	2.1
Promissory note from the affiliate	6.2
Semiannual interest payments received	$ 0.1
Maturity date	Sep. 30, 2016
Paulson & Co. Inc. | Investor
Related Party Transaction [Line Items]
Purchase price of lots		$ 9.3
Related party stock ownership		5.00%
Notes payable, related parties		$ 3.0