Legal Matters	12 Months Ended
Mar. 31, 2012
Legal Matters [Abstract]
Legal Matters	10. Legal Matters From time to time, we are involved in legal proceedings concerning matters arising in connection with the conduct of our business activities. We regularly evaluate the status of legal proceedings in which we are involved, to assess whether a loss is probable or there is a reasonable possibility that a loss or additional loss may have been incurred and determine if accruals are appropriate. We further evaluate each legal proceeding to assess whether an estimate of possible loss or range of loss can be made, if accruals are not appropriate. On September 1, 2011, HSM Portfolio LLC and Technology Properties Limited LLC (collectively, the “Plaintiffs”) filed suit against Cirrus Logic and 17 other defendants in the U.S. District Court, District of Delaware. The Plaintiffs allege that Cirrus Logic infringed U.S. Patent No. 5,030,853. In their complaint, the Plaintiffs indicated that they are seeking unspecified monetary damages, including up to treble damages for willful infringement. On March 8, 2012, Cirrus Logic settled the matter and paid the Plaintiffs $100 thousand to fully resolve the lawsuit. The case was dismissed effective March 28, 2012. In fiscal year 2011 the Company recorded $162 thousand in settlement for certain litigation expenses settled during the year. In fiscal year 2010, a combined net proceeds of $2.6 million from various settled litigation was recorded.

From time to time, we are involved in legal proceedings concerning matters arising in connection with the conduct of our business activities. We regularly evaluate the status of legal proceedings in which we are involved, to assess whether a loss is probable or there is a reasonable possibility that a loss or additional loss may have been incurred and determine if accruals are appropriate. We further evaluate each legal proceeding to assess whether an estimate of possible loss or range of loss can be made, if accruals are not appropriate.

On September 1, 2011, HSM Portfolio LLC and Technology Properties Limited LLC (collectively, the “Plaintiffs”) filed suit against Cirrus Logic and 17 other defendants in the U.S. District Court, District of Delaware. The Plaintiffs allege that Cirrus Logic infringed U.S. Patent No. 5,030,853. In their complaint, the Plaintiffs indicated that they are seeking unspecified monetary damages, including up to treble damages for willful infringement. On March 8, 2012, Cirrus Logic settled the matter and paid the Plaintiffs $100 thousand to fully resolve the lawsuit. The case was dismissed effective March 28, 2012.

In fiscal year 2011 the Company recorded $162 thousand in settlement for certain litigation expenses settled during the year.

In fiscal year 2010, a combined net proceeds of $2.6 million from various settled litigation was recorded.