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Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Line of Credit Facility [Line Items]    
Debt $ 372,759 $ 381,515
Deferred finance costs, net $ 7,953 $ 8,267
Senior Notes    
Line of Credit Facility [Line Items]    
Interest rate percentage 8.50% 8.50%
Debt $ 216,495 $ 224,647
Debt instrument, maturity date Jun. 01, 2022  
Six Percent Tangible Equity Units    
Line of Credit Facility [Line Items]    
Average interest rate 6.00% 6.00%
Debt instrument, maturity date Dec. 15, 2016  
Convertible Debt    
Line of Credit Facility [Line Items]    
Debt $ 105,798 $ 104,719
Secured Debt    
Line of Credit Facility [Line Items]    
Debt $ 15,400 $ 15,400
Average interest rate 3.43% 3.42%
Other indebtedness    
Line of Credit Facility [Line Items]    
Debt $ 28,514 $ 28,083
Variable and fixed interest rates ranging, minimum 2.44%  
Variable and fixed interest rates ranging, maximum 5.50%  
Convertible Debt    
Line of Credit Facility [Line Items]    
Interest rate percentage 3.75% 3.75%
Debt instrument, maturity date Mar. 01, 2020  
Six Percent Tangible Equity Units    
Line of Credit Facility [Line Items]    
Interest rate percentage 6.00%  
Debt $ 6,552 $ 8,666