Intangible Assets
 12 Months Ended
Mar. 31, 2012
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Intangible Assets
Intangible Assets

The following table summarizes the gross carrying amount, accumulated amortization and net carrying amount by intangible asset class:
 
March 31,
 
2012
2011
 
Gross
Carrying
Amount

Accum.
Amort.

Net
Carrying
Amount

Gross
Carrying
Amount

Accum.
Amort.

Net
Carrying
Amount

Definite-lived
 
 
 
 
 
 
Non-compete agreements
$
12,228

$
10,194

$
2,034

$
10,660

$
9,332

$
1,328

Customer relationships
140,669

47,226

93,443

126,367

35,301

91,066

Acquired backlog
20,838

17,513

3,325

17,349

17,349

—

Total
$
173,735

$
74,933

$
98,802

$
154,376

$
61,982

$
92,394

Indefinite-lived
  
  
  
  
  
  
Trademarks
35,992

8,253

27,739

35,992

8,253

27,739

Total
$
209,727

$
83,186

$
126,541

$
190,368

$
70,235

$
120,133


The Company’s indefinite-lived intangible assets consist solely of the Company’s trademark portfolio. The Company’s definite-lived intangible assets are comprised of employee non-compete agreements, customer relationships and backlog obtained through business acquisitions.

The following table summarizes the changes to the net carrying amounts by intangible asset class:
 
Trademarks

Non-Competes
and Backlog

Customer
Relationships

Total

Balance at March 31, 2010
$
27,739

$
2,635

$
93,619

$
123,993

Amortization expense
—

(1,445
)
(10,711
)
(12,156
)
Currency translation
—

12

—

12

Current period acquisitions (see Note 11)
—

126

8,158

8,284

Prior period acquisitions (see Note 11)
—

—

—

—

Balance at March 31, 2011
$
27,739

$
1,328

$
91,066

$
120,133

Amortization expense
—

(1,100
)
(11,925
)
(13,025
)
Currency translation
—

5

—

5

Current period acquisitions (see Note 11)
—

5,126

14,302

19,428

Prior period acquisitions (see Note 11)
—

—

—

—

Balance at March 31, 2012
$
27,739

$
5,359

$
93,443

$
126,541


Intangibles amortization was $13,025, $12,156 and $15,202 for Fiscal 2012, Fiscal 2011 and Fiscal 2010, respectively. The Company acquired definite-lived intangibles from the completion of several acquisitions during Fiscal 2012 and Fiscal 2011 (see Note 11).

The following table details the estimated intangibles amortization expense for the next five years. These estimates are based on the carrying amounts of Intangible assets as of March 31, 2012 that are provisional measurements of fair value and are subject to change pending the outcome of purchase accounting related to certain acquisitions:
Fiscal
 
2013
$
13,890

2014
12,656

2015
11,174

2016
10,758

2017
9,427

Thereafter
40,897

Total
$
98,802