Commitments and contingent liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Lease Payments Under Noncancelable Operating Leases

Future minimum lease payments as of December 31, 2014 under noncancelable operating leases are as follows:

	Future Lease Payments
	(Dollars in thousands)
2015	$	27,706
2016	23,292
2017	18,846
2018	15,474
2019 and thereafter	32,182