Lease Commitments Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2014

Leases, Operating [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Future minimum lease payments due under non-cancellable operating leases in effect at December 31, 2014 were as follows (in thousands of dollars):

2015	$	17,325
2016	15,227
2017	12,107
2018	5,284
2019	5,077
Thereafter	40,780
Total future minimum lease payments	$	95,800