Quarterly Results (unaudited) (Tables)

12 Months Ended

Mar. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Results (unaudited)

	For the Years Ended March 31,
	2015		2014
	(dollars in thousands, except per share data)
First Quarter -
Revenues	$	266,251	$	227,044
Gross Profit		56,401		46,604
Earnings Before Income Taxes		55,786		44,516
Net Earnings		37,710		30,101
Diluted Earnings Per Share	$	0.75	$	0.60
Second Quarter -
Revenues	$	284,808	$	252,646
Gross Profit		75,061		59,479
Earnings Before Income Taxes		74,577		58,688
Net Earnings		50,319		39,903
Diluted Earnings Per Share	$	1.00	$	0.80
Third Quarter -
Revenues	$	291,529	$	228,812
Gross Profit		79,149		49,848
Earnings Before Income Taxes		77,866		48,833
Net Earnings		52,030		31,621
Diluted Earnings Per Share	$	1.03	$	0.63
Fourth Quarter -
Revenues	$	223,780	$	189,894
Gross Profit		43,522		29,528
Earnings Before Income Taxes		44,698		29,767
Net Earnings		46,794		22,618
Diluted Earnings Per Share	$	0.93	$	0.45