Commitments (Tables)

12 Months Ended

Dec. 31, 2013

Commitments

Schedule of total payments made for purchases under long-term supply contracts

	December 31
(Dollars in thousands)	2013		2012		2011
Raw and other materials	$	40,170	$	30,802	$	33,953
Transportation	9,794		9,731		8,782
Information systems and services	2,746		4,505		3,846
Total payments	$	52,710	$	45,038	$	46,581

Schedule of future minimum purchase requirements under the terms of long-term supply contracts

	Due in
(Dollars in thousands)	2014		2015		2016		2017		2018		Thereafter
Raw and other materials	$	37,800	$	31,679	$	19,162	$	19,580	$	20,017	$	2,164
Transportation	1,575		1,575		436		—		—		—
Information systems and services	2,397		2,397		—		—		—		—
Total contractual cash obligations	$	41,772	$	35,651	$	19,598	$	19,580	$	20,017	$	2,164