Quarterly Results (Unaudited) (Tables)

12 Months Ended

Mar. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Summary of Unaudited Quarterly Results of Operations

The following is a summary of unaudited quarterly results of operations for each of the quarters in the two fiscal years ended March 31, 2014 and 2015:

	Revenues		Gross Profit		Net Income		Net Income per Basic Common Share		Net Income per Diluted Common Share
Fiscal Year Ended March 31, 2014:
First Quarter	$	118,113,000	$	26,918,000	$	8,609,000	$	0.40	$	0.40
Second Quarter		119,359,000		27,320,000		8,675,000		0.41		0.41
Third Quarter		121,098,000		27,706,000		8,775,000		0.42		0.41
Fourth Quarter		120,246,000		26,537,000		8,333,000		0.40		0.39
Fiscal Year Ended March 31, 2015:
First Quarter	$	124,364,000	$	27,700,000	$	8,299,000	$	0.40	$	0.39
Second Quarter		123,714,000		25,467,000		7,883,000		0.38		0.37
Third Quarter		122,352,000		24,128,000		6,832,000		0.33		0.33
Fourth Quarter		122,195,000		22,674,000		5,576,000		0.27		0.27