XML 62 R48.htm IDEA: XBRL DOCUMENT v3.8.0.1
Real Estate Investments - Depreciation and Base Rents (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
lease
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Depreciation      
Depreciation expense $ 37,492 $ 35,809 $ 29,329
Number of master leases with agreed upon cash rent | lease 1    
Future minimum base rents receivable under the remaining non-cancelable terms of operating leases excluding the effects of straight-line rent and renewal options      
2018 $ 129,873    
2019 129,641    
2020 131,948    
2021 117,646    
2022 104,016    
Thereafter $ 674,779