Quarterly report pursuant to Section 13 or 15(d)

Information by Business Segment (Details 3)

v3.5.0.2
Information by Business Segment (Details 3) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Reconciliation of segment assets to total assets      
Assets $ 3,841,692 $ 3,909,312 $ 3,904,059
Segment assets      
Reconciliation of segment assets to total assets      
Assets 3,289,117   3,218,657
Non-operating property assets      
Reconciliation of segment assets to total assets      
Assets 413,597   527,742
Other assets      
Reconciliation of segment assets to total assets      
Assets $ 138,978   $ 157,660