Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Nov. 02, 2013
Accounting Policies [Abstract]
Cash and Cash Equivalents	Cash and cash equivalents include bank deposit accounts, money market accounts and other highly liquid investments with original maturities of 90 days or less. At November 2, 2013, substantially all of the cash and cash equivalents were invested in U.S. Treasury bills with original maturities of 90 days or less and overnight federally-sponsored agency notes.
Short-term Investments	Short-term investments consist of investments in securities with remaining maturities of less than one year, excluding investments with original maturities of 90 days or less. At November 2, 2013, short-term investments consisted solely of U.S. Treasury bills with remaining maturities ranging from less than one month to five months. These investments are classified as held-to-maturity and their market values approximate their carrying values.
Inventories	We record inventory at the lower of cost or market (“LCM”). Cost is determined using the first-in, first-out method. We capitalize into inventory certain sourcing, warehousing and freight delivery costs associated with shipping our merchandise to the point of sale. We periodically review quantities of inventories on hand and compare these amounts to the expected sales of each product. We record a charge to cost of goods sold for the amount required to reduce the carrying value of inventory to estimated net realizable value.
Landlord Contributions	We typically receive reimbursement from landlords for a portion of the cost of leasehold improvements for new stores and, occasionally, for renovations and relocations. These landlord contributions are initially accounted for as an increase to Deferred rent and as an increase to Prepaid expenses and other current assets when the related store is opened. When collected, we record cash and reduce the prepaid expenses and other current assets account. The collection of landlord contributions is presented in the Condensed Consolidated Statements of Cash Flows as an operating activity. The deferred rent is amortized over the lease term in a manner that is consistent with our policy to straight-line rent expense over the term of the lease. The amortization is recorded as a reduction to sales and marketing expense, which is consistent with the classification of lease expense.
Gift Cards and Certificates	We sell gift cards and gift certificates to individuals and companies. Our incentive gift certificates are used by various companies as a reward for achievement for their employees. We also redeem proprietary gift cards and gift certificates marketed by third-party premium/incentive companies. We record a liability when a gift card/certificate is purchased. As the gift card/certificate is redeemed, we reduce the liability and record revenue. Substantially all of our gift cards/certificates do not have expiration dates and they are all subject to state escheatment laws. Based on historical experience, gift cards/certificates redemptions after the escheatment due date are remote and we recognize any income (also referred to as “breakage”) on these unredeemed gift cards/certificates on a specific identification basis on the escheatment due date.
Tuxedo Rental Product	Revenues from tuxedo rental products are recognized on a gross basis upon delivery of rental products to customers. When a customer orders a tuxedo rental from us, we place an order with a national distributor who delivers the product to our stores, typically within several days prior to the intended use. The national distributor owns the rental product and charges the Company a rental cost for each rental and delivery which is recorded to Cost of goods sold.
Equity Compensation	We account for our equity awards in accordance with FASB ASC 718, “Share-Based Payment” (“ASC 718”), which requires the compensation cost resulting from all share-based awards to be recognized in the financial statements. The amount of compensation is measured based on the grant-date fair value of the awards and is recognized over the vesting period of the awards. The vesting of awards to both the officers and directors is subject to service conditions being met, currently ranging from one to three years. Additionally, the vesting of awards to officers is subject to performance conditions being met in the fiscal year that the awards are granted such as, among other things, the attainment of certain annual earnings and performance goals. For these officer awards, we estimate the probability that such goals will be attained based on results-to-date at each interim quarter-end and record compensation cost to "General and administrative expense" for these awards based on the awards projected to vest. Share-based compensation expense recognized for the third quarter and first nine months of fiscal year 2013 related to equity awards issued under the Jos. A. Bank Clothiers, Inc. 2010 Equity Incentive Plan (“Equity Incentive Plan”) was $0.3 million and $1.3 million, respectively, and the tax benefit recognized related to this compensation for each of the third quarter and the first nine months was $0.1 million and $0.5 million. Share based compensation expense for the third quarter and first nine months of fiscal year 2012 was $0.2 million and $1.6 million, respectively, and the tax benefit recognized related to this compensation was $0.1 million and $0.6 million

Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.

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Disclosure of accounting policy for major classes of inventories, bases of stating inventories (for example, lower of cost or market), methods by which amounts are added and removed from inventory classes (for example, FIFO, LIFO, or average cost), loss recognition on impairment of inventories, and situations in which inventories are stated above cost. If inventory is carried at cost, this disclosure includes the nature of the cost elements included in inventory.

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Disclosure of accounting policy for investments in financial assets, including marketable securities (debt and equity securities with readily determinable fair values), investments accounted for under the equity method and cost method, securities borrowed and loaned, and repurchase and resale agreements. For marketable securities, the disclosure may include the entity's accounting treatment for transfers between investment categories and how the fair values for such securities are determined. Also, for all investments, an entity may describe its policy for assessing, recognizing and measuring impairment of the investment.

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