This element represents the amortization of deferred leasing fees incurred by the lessor and amortized over the term of the lease. Such fees represent (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction.

+ References+ Details

The cash inflow from sale of buildings.

+ References+ Details

- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details

Sale of Building and Land - Schedule of realized gain on sale of building and land (Detail) (USD $) In Thousands, unless otherwise specified			0 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 27, 2013 Chelmsford, Massachusetts Campus	Sep. 27, 2013 Chelmsford, Massachusetts Campus	Sep. 27, 2013 Chelmsford, Massachusetts Campus Buildings and land
Real Estate Properties [Line Items]
Sale proceeds			$ 11,275
Net book value of building and land	(47,870)	(64,478)			(6,095)
Amortization of Deferred Leasing Fees				(3,718)
Direct transaction costs			(437)
Gain on the sale of building and land			$ 1,025