Notes Payable, Long-Term Debt and Other Obligations (Convertible Notes Table) (Details) - Convertible Debt	6 Months Ended	12 Months Ended
	Jun. 30, 2016 shares	Dec. 31, 2015 shares
7.5% Variable Interest Senior Convertible Notes due 2019
Debt Instrument [Line Items]
Conversion Price (in dollars per share)	15.98	15.98
Note conversion (in shares)	62.5743	62.5743
5.5% Variable Interest Senior Convertible Debentures due 2020
Debt Instrument [Line Items]
Conversion Price (in dollars per share)	24.64	24.64
Note conversion (in shares)	40.5891	40.5891