Intangible Assets

12 Months Ended

Mar. 31, 2014

Note 7 — Intangible Assets

Our intangible assets consist of the following:

		March 31, 2014				March 31, 2013
						Gross Carrying
	Amortizable	Gross Carrying		Accumulated		Amount		Accumulated
	Lives	Amount		Amortization		(Note 2)		Amortization
				(in thousands)
Amortizable -
Customer relationships (1)	3–20 years	$	697,405	$	83,261	$	405,160	$	30,959
Water facility development agreement	5 years	14,000		2,100		—		—
Lease and other agreements	5–8 years	23,920		13,190		15,210		7,018
Non-compete agreements	2–7 years	14,161		6,388		11,509		2,871
Trade names	1–10 years	15,489		3,081		2,784		326
Debt issuance costs	5–10 years	44,089		8,708		19,494		2,981
Total amortizable		809,064		116,728		454,157		44,155

Non-amortizable -
Trade names		22,620				31,430
Total		$	831,684	$	116,728	$	485,587	$	44,155

(1) The weighted-average remaining amortization period for customer relationship intangible assets is approximately nine years.

Amortization expense was as follows:

	Year Ended March 31,
Recorded in	2014		2013		2012
	(in thousands)
Depreciation and amortization	$	60,855	$	29,657	$	4,538
Cost of sales	6,172		5,285		800
Interest expense	5,727		3,375		1,277
Loss on early extinguishment of debt	—		5,769		—
	$	72,754	$	44,086	$	6,615

Expected amortization of our intangible assets is as follows (in thousands):