Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments And Contingencies Disclosure [Abstract]

Future Minimum Annual Rental Commitments under Various Non-cancellable Operating Leases

Future minimum annual rental commitments as of December 31, 2016 under various non-cancellable operating leases for our office facilities, which expire at various dates through 2030, are as follows:

Rental Commitments for Years Ended December 31,
amounts in thousands
2017	$	13,024
2018		11,843
2019		9,107
2020		8,945
2021		7,684
2022-2030		38,267
Total minimum operating lease payments	$	88,870