Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2012

Accrued Liabilities [Abstract]

Schedule of Accrued Liabilities

	December 31, 2012		December 31, 2011
	(dollars in thousands)
Self-insurance	$	12,050	$	12,630
Wages and bonus	22,080		21,220
Other	40,290		38,270
Total accrued liabilities	$	74,420	$	72,120