Business Segments (Tables)

12 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Financial Information Related to Operations by Segment

The following table sets forth certain financial information relating to our operations by segment

	For the Years Ended March 31,
	2016			2015			2014
	(dollars in thousands)
Revenues -
Cement	$	528,499		$	488,644		$	438,224
Gypsum Wallboard		461,457			437,514			387,016
Paperboard		149,192			142,690			130,178
Oil and Gas Proppants		57,591			81,381			19,557
Concrete and Aggregates		128,073			107,892			96,908
		1,324,812			1,258,121			1,071,883
Less: Intersegment Revenues		(73,862	)		(65,533	)		(62,094	)
Less: Joint Venture Revenues		(107,458	)		(126,220	)		(111,393	)
	$	1,143,492		$	1,066,368		$	898,396

	For the Years Ended March 31,
	2016		2015		2014
	(dollars in thousands)
Intersegment Revenues -
Cement	$	13,939	$	9,598	$	8,952
Paperboard		59,001		55,060		52,119
Concrete and Aggregates		922		875		1,023
	$	73,862	$	65,533	$	62,094
Cement Sales Volumes (M tons) -
Wholly-Owned		3,903		3,744		3,580
Joint Venture		875		1,055		1,013
		4,778		4,799		4,593

		For the Years Ended March 31,
		2016			2015			2014
		(dollars in thousands)
Operating Earnings -
Cement	$		137,854		$	117,527		$	89,486
Gypsum Wallboard			159,352			145,871			114,852
Paperboard			32,153			31,512			23,610
Oil and Gas Proppants			(68,466	)		(2,546	)		(4,890	)
Concrete and Aggregates			9,807			6,736			212
Other, net			2,328			3,201			1,368
Sub-Total			273,028			302,301			224,638
Corporate General and Administrative			(37,193	)		(30,751	)		(24,552	)
Acquisition, Litigation and Other Expense			—			(6,880	)		—
Earnings Before Interest and Income Taxes			235,835			264,670			200,086
Interest Expense, net			(16,583	)		(11,743	)		(18,282	)
Earnings Before Income Taxes		$	219,252		$	252,927		$	181,804
Cement Operating Earnings -
Wholly-Owned		$	98,771		$	72,560		$	51,675
Joint Ventures			39,083			44,967			37,811
		$	137,854		$	117,527		$	89,486
Capital Expenditures -
Cement		$	20,262		$	27,086		$	12,226
Gypsum Wallboard			4,832			7,129			4,825
Paperboard			5,542			1,888			3,354
Oil and Gas Proppants			40,144			61,484			34,264
Concrete and Aggregates			18,783			13,851			4,572
Other, net			—			135			249
		$	89,563		$	111,573		$	59,490
Depreciation , Depletion and Amortization -
Cement		$	33,400		$	31,839		$	31,829
Gypsum Wallboard			19,988			20,092			20,981
Paperboard			8,312			8,251			8,716
Oil and Gas Proppants			27,227			8,839			1,707
Concrete and Aggregates			6,260			5,533			5,205
Corporate and Other			1,918			1,745			1,583
		$	97,105		$	76,299		$	70,021

	As of March 31,
	2016		2015		2014
	(dollars in thousands)
Identifiable Assets
Cement	$	819,994	$	777,956	$	762,578
Gypsum Wallboard		392,523		403,279		412,566
Paperboard		127,371		123,519		125,045
Oil and Gas Proppants		409,497		455,572		92,199
Concrete and Aggregates		106,634		96,610		87,364
Other, net		27,616		23,390		31,777
	$	1,883,635	$	1,880,326	$	1,511,529

Segment Breakdown of Goodwill

The segment breakdown of goodwill at March 31, 2016 and 2015 is as follows:

	For the Years Ended March 31,
	2016		2015
	(dollars in thousands)
Cement	$	9,729	$	8,359
Gypsum Wallboard		116,618		116,618
Paperboard		7,538		7,538
	$	133,885	$	132,515