Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details 4)

v3.6.0.2
Fair Value Measurements (Details 4) - Fair value measurement on a nonrecurring basis [Member] - Fair Value, Inputs, Level 3 [Member]
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Discounted cash flow [Member]  
Assets and liabilities measured at fair value on a recurring basis  
Fair Values on Measurement Date $ 77,203
Discounted cash flow [Member] | Minimum [Member]  
Assets and liabilities measured at fair value on a recurring basis  
Discount rate (percent) 9.30%
Terminal capitalization rate (percent) 7.80%
Discounted cash flow [Member] | Maximum [Member]  
Assets and liabilities measured at fair value on a recurring basis  
Discount rate (percent) 11.30%
Terminal capitalization rate (percent) 8.50%
Discounted cash flow [Member] | Weighted Average [Member]  
Assets and liabilities measured at fair value on a recurring basis  
Discount rate (percent) 9.90%
Terminal capitalization rate (percent) 8.10%
Yield analyses [Member]  
Assets and liabilities measured at fair value on a recurring basis  
Fair Values on Measurement Date $ 2,482
Investor yield requirement (percent) 9.00%