Annual report pursuant to Section 13 and 15(d)

Leases (Details)

v3.6.0.2
Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Operating Leased Assets [Line Items]      
Operating Leases, Rent Expense $ 11,100 $ 10,500 $ 10,500
2017, Minimum Payment [1] 2,308    
2018, Minimum Payment [1] 2,262    
2019, Minimum Payment [1] 2,262    
2020, Minimum Payment [1] 2,262    
2021, Minimum Payment [1] 2,239    
Thereafter, Minimum Payment [1] 45,372    
Total, Minimum Payment [1] $ 56,705    
Land [Member] | Maximum [Member]      
Operating Leased Assets [Line Items]      
Initial Term of Lease 30 years    
Term of Available Extension 60 years    
[1] Includes certain lease option renewals that are reasonably assured.