CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Income Statement
Net sales	$ 546,243		$ 492,669		$ 1,075,119		$ 955,461
Cost of sales (1)	238,789	[1]	203,806	[1]	461,146		400,024
Gross profit	307,454		288,863		613,973		555,437
Operating expenses:
Research and development (1)	88,814	[1]	78,254	[1]	173,184		151,339
Selling, general and administrative (1)	71,114	[1]	69,368	[1]	140,369		135,078
Amortization of acquired intangible assets	45,433		23,744		82,077		51,421
Special charges (income)	775		(11)		1,079		1,690
Total operating expenses	206,136		171,355		396,709		339,528
Operating income	101,318		117,508		217,264		215,909
Losses on equity method investments	(35)		(101)		(67)		(361)
Other income (expense):
Interest income	4,531		4,010		9,273		7,935
Interest expense	(14,019)		(12,354)		(27,697)		(24,210)
Other (expense) income, net	(1,091)		2,143		(1,078)		2,269
Income before income taxes	90,704		111,206		197,695		201,542
Income tax (benefit) provision	(1,334)		11,400		15,748		23,157
Net income	92,038		99,806		181,947		178,385
Less: Net loss attributable to noncontrolling interests	1,603		0		1,603		0
Net income attributable to Microchip Technology	93,641		99,806		183,550		178,385
Basic net income per common share attributable to Microchip Technology stockholders	$ 0.47		$ 0.50		$ 0.92		$ 0.90
Diluted net income per common share attributable to Microchip Technology stockholders	$ 0.42		$ 0.46		$ 0.82		$ 0.83
Dividends declared per common share	$ 0.3560		$ 0.3540		$ 0.7115		$ 0.7075
Basic common shares outstanding	200,629		197,825		200,408		197,388
Diluted common shares outstanding	225,284		216,475		224,906		214,371
Allocated Share-based Compensation Expense	13,440		13,411		25,341		24,665
Cost of Sales [Member]
Other income (expense):
Allocated Share-based Compensation Expense	2,640	[2]	1,864	[2]	4,695	[2]	3,833	[2]
Research and Development Expense [Member]
Other income (expense):
Allocated Share-based Compensation Expense	7,261		6,931		13,570		12,621
Selling, General and Administrative Expenses [Member]
Other income (expense):
Allocated Share-based Compensation Expense	$ 5,372		$ 6,205		$ 10,329		$ 11,202

[1] Includes share-based compensation expense as follows:Cost of sales 2,640 1,864 4,695 3,833 Research and development 7,261 6,931 13,570 12,621 Selling, general and administrative 5,372 6,205 10,329 11,202

[2] During the three and six months ended September 30, 2014, $1.6 million and $3.3 million, respectively, of share-based compensation expense was capitalized to inventory and $2.6 million and $4.7 million, respectively, of previously capitalized share-based compensation expenses in inventory was sold. During the three and six months ended September 30, 2013, $2.4 million and $3.8 million, respectively, of share-based compensation expense was capitalized to inventory and $1.9 million and $3.8 million, respectively, of previously capitalized share-based compensation expense in inventory was sold.