Business Segments (Tables)

12 Months Ended

Mar. 31, 2015

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,
	2015			2014			2013
	(dollars in thousands)
Revenues -
Cement	$	488,644		$	438,224		$	304,125
Gypsum Wallboard		437,514			387,016			306,529
Paperboard		142,690			130,178			121,930
Oil and Gas Proppants		81,381			19,557			—
Concrete and Aggregates		107,892			96,908			56,287
		1,258,121			1,071,883			788,871
Less: Intersegment Revenues		(65,533	)		(62,094	)		(49,987	)
Less: Joint Venture Revenues		(126,220	)		(111,393	)		(96,322	)
	$	1,066,368		$	898,396		$	642,562

	For the Years Ended March 31,
	2015		2014		2013
	(dollars in thousands)
Intersegment Revenues -
Cement	$	9,598	$	8,952	$	2,850
Paperboard		55,060		52,119		46,393
Concrete and Aggregates		875		1,023		744
	$	65,533	$	62,094	$	49,987
Cement Sales Volumes (M tons) -
Wholly-Owned		3,744		3,580		2,390
Joint Venture		1,055		1,013		913
		4,799		4,593		3,303

		For the Years Ended March 31,
		2015			2014			2013
		(dollars in thousands)
Operating Earnings -
Cement	$		117,527		$	89,486		$	46,228
Gypsum Wallboard			145,871			114,852			69,712
Paperboard			31,512			23,610			25,200
Oil and Gas Proppants			(2,546	)		(4,890	)		(1,253	)
Concrete and Aggregates			6,736			212			(5,388	)
Other, net			3,201			1,368			21
Sub-Total			302,301			224,638			134,520
Corporate General and Administrative			(30,751	)		(24,552	)		(23,918	)
Acquisition, Litigation and Other Expense			(6,880	)		—			(10,683	)
Earnings Before Interest and Income Taxes			264,670			200,086			99,919
Interest Expense, net			(11,743	)		(18,282	)		(15,823	)
Earnings Before Income Taxes		$	252,927		$	181,804		$	84,096
Cement Operating Earnings -
Wholly-Owned		$	72,560		$	51,675		$	13,721
Joint Ventures			44,967			37,811			32,507
		$	117,527		$	89,486		$	46,228
Capital Expenditures -
Cement		$	27,086		$	12,226		$	15,583
Gypsum Wallboard			7,129			4,825			2,682
Paperboard			1,888			3,354			804
Oil and Gas Proppants			61,484			34,264			—
Concrete and Aggregates			13,851			4,572			33,932
Other, net			135			249			10
		$	111,573		$	59,490		$	53,011
Depreciation , Depletion and Amortization -
Cement		$	31,839		$	31,829		$	20,658
Gypsum Wallboard			20,092			20,981			21,045
Paperboard			8,251			8,716			8,824
Oil and Gas Proppants			8,839			1,707			—
Concrete and Aggregates			5,533			5,205			5,212
Corporate and Other			1,745			1,583			1,111
		$	76,299		$	70,021		$	56,850

	As of March 31,
	2015		2014		2013
	(dollars in thousands)
Identifiable Assets
Cement	$	777,956	$	762,578	$	756,158
Gypsum Wallboard		403,279		412,566		425,866
Paperboard		123,519		125,045		129,226
Oil and Gas Proppants		455,572		92,199		48,929
Concrete and Aggregates		96,610		87,364		87,054
Other, net		25,655		31,777		29,000
	$	1,882,591	$	1,511,529	$	1,476,233

Segment Breakdown of Goodwill

The segment breakdown of goodwill at March 31, 2015 and 2014 is as follows:

	For the Years Ended March 31,
	2015		2014
	(dollars in thousands)
Cement	$	8,359	$	8,359
Gypsum Wallboard		116,618		116,618
Paperboard		7,538		7,538
	$	132,515	$	132,515