| Real Estate and Intangible Assets - Leasing Activity (Details) $ in Thousands | 12 Months Ended | |
|---|---|---|
| Dec. 31, 2016  USD ($)  ft² | Dec. 31, 2015  USD ($)  ft² | |
| Real Estate Properties [Line Items] | ||
| Square Footage | ft² | 551,335 | 890,092 | 
| Annualized GAAP Rent | $ 2,478 | $ 7,514 | 
| Tenant Improvement | 1,244 | 2,881 | 
| Leasing Commissions | $ 436 | $ 1,925 | 
| Weighted Average [Member] | ||
| Real Estate Properties [Line Items] | ||
| Lease Term | 3 years 10 months 24 days | 7 years 3 months 18 days | 
| Minimum [Member] | ||
| Real Estate Properties [Line Items] | ||
| Lease Term | 1 year | 1 year | 
| Maximum [Member] | ||
| Real Estate Properties [Line Items] | ||
| Lease Term | 7 years 8 months 12 days | 12 years 4 months 24 days | 
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