| Schedule of Related Party Transactions, by Related Party (Details) - USD ($) $ in Thousands | 3 Months Ended | |
|---|---|---|
| Mar. 31, 2016 | Mar. 31, 2015 | |
| Related Party Transaction [Line Items] | ||
| Asset Management Costs | $ 12,044 | $ 12,721 | 
| Management Fee, Percent | 1.50% | |
| Costs and Expenses, Related Party | $ 6,794 | 4,770 | 
| Allocated Share-based Compensation Expense | $ 2,851 | $ 2,689 | 
| X | ||||||||||
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- Definition Percent per annum of stockholders' equity used to calculate the management fee due to PRCM Advisers. No definition available. 
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The aggregate costs related to asset management during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Costs of sales and operating expenses for the period incurred from transactions with related parties. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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