Quarterly report pursuant to Section 13 or 15(d)

Information by Business Segment (Details 4)

v3.7.0.1
Information by Business Segment (Details 4) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Reconciliation of segment assets to total assets      
Assets $ 3,739,366 $ 3,780,885 $ 3,937,908
Segment assets      
Reconciliation of segment assets to total assets      
Assets 2,952,352   3,305,392
Non-operating property assets      
Reconciliation of segment assets to total assets      
Assets 429,690   444,334
Other assets      
Reconciliation of segment assets to total assets      
Assets $ 357,324   $ 188,182