Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2013
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies Basis of Presentation. These consolidated financial statements include the accounts of us and our subsidiaries, all of which are 100% owned directly or indirectly by us. All intercompany transactions and balances with or among our consolidated subsidiaries have been eliminated. Prior to our IPO, CWH directly or indirectly wholly owned us, and we have presented applicable transactions at CWH's historical basis. We account for our investment in Affiliates Insurance Company, or AIC, using the equity method of accounting. Significant influence is present through common representation on the boards of trustees or directors of us and AIC. Our Managing Trustees are also owners of Reit Management & Research LLC, or RMR, which is the manager of us and AIC, and each of our Trustees is a director of AIC. See Note 5 for a further discussion of our investment in AIC. Real Estate Properties. We record our Initial Properties at cost to CWH and our other properties at our cost and depreciate real estate investments on a straight line basis over estimated useful lives of up to 40 years for buildings and improvements, and up to 12 years for personal property. We and CWH allocated the purchase prices of our properties to land, building and improvements based on determinations of the relative fair values of these assets assuming the properties are vacant. We and CWH determined the fair value of each property using methods similar to those used by independent appraisers. We and CWH allocated a portion of the purchase price of our properties to above market and below market leases based on the present value (using an interest rate which reflects the risks associated with acquired in place leases at the time each property was acquired by us or CWH) of the difference between (i) the contractual amounts to be paid pursuant to the acquired in place leases and (ii) our estimates of fair market lease rates for the corresponding leases, measured over a period equal to the terms of the respective leases. We and CWH allocated a portion of the purchase price to acquired in place leases and tenant relationships in an amount equal to the excess of (i) the purchase price paid for each property, after adjusting existing acquired in place leases to market rental rates, over (ii) the estimated fair value of the property, as if vacant. We and CWH allocated this aggregate value between acquired in place lease values and tenant relationships based on our evaluation of the specific characteristics of each tenant's lease. However, we have not separated the value of tenant relationships from the value of acquired in place leases because such value and related amortization expense is immaterial to the accompanying financial statements. In making these allocations, we considered factors such as estimated carrying costs during the expected lease up periods, including real estate taxes, insurance and other operating income and expenses and costs, such as leasing commissions, legal and other related expenses, to execute similar leases in current market conditions at the time a property was acquired by us or CWH. If the value of tenant relationships becomes material in the future, we may separately allocate those amounts and amortize the allocated amount over the estimated life of the relationships. We amortize capitalized above market lease values (included in acquired in place real estate leases in our consolidated balance sheets) and below market lease values (presented as assumed real estate lease obligations in our consolidated balance sheets) as a reduction or increase, respectively, to rental income over the terms of the associated leases. Such amortization resulted in net decreases to rental income of $1,123, $2,056, and $725 during the years ended December 31, 2013, 2012 and 2011, respectively. We amortize the value of acquired in place leases (included in acquired real estate leases in our consolidated balance sheets), exclusive of the value of above market and below market acquired in place leases, over the terms of the associated leases. Such amortization, which is included in depreciation and amortization expense, amounted to $20,482, $17,390, and $12,182 during the years ended December 31, 2013, 2012 and 2011, respectively. When a lease is terminated prior to its stated expiration, we write off the unamortized amounts relating to that lease. Capitalized above market lease values were $38,487 and $39,591 as of December 31, 2013 and 2012, respectively, net of accumulated amortization of $14,271 and $10,892, respectively. Capitalized below market lease values were $27,304 and $28,408 as of December 31, 2013 and 2012, respectively, net of accumulated amortization of $8,220 and $9,279, respectively. The value of acquired in place leases, exclusive of the value of above and below market acquired in place leases, were $167,256 and $148,372 as of December 31, 2013 and 2012, respectively, net of accumulated amortization of $49,207 and $32,669, respectively. Future amortization of net intangible lease assets and liabilities, to be recognized over the current terms of the associated leases as of December 31, 2013 are estimated to be $23,566 in 2014, $21,209 in 2015, $18,453 in 2016, $16,174 and 2017, $13,521 in 2018 and $30,259 thereafter. We regularly evaluate whether events or changes in circumstances have occurred that could indicate an impairment in the value of long lived assets. If there is an indication that the carrying value of an asset is not recoverable, we estimate the projected undiscounted cash flows to determine if an impairment loss should be recognized. We determine the amount of any impairment loss by comparing the historical carrying value to estimated fair value. We estimate fair value through an evaluation of recent financial performance and projected discounted cash flows using standard industry valuation techniques. In addition to consideration of impairment upon the events or changes in circumstances described above, we regularly evaluate the remaining lives of our long lived assets. If we change our estimate of the remaining lives, we allocate the carrying value of the affected assets over their revised remaining lives. Cash and Cash Equivalents. We consider highly liquid investments with original maturities of three months or less at the date of purchase to be cash equivalents. Restricted Cash. Restricted cash consists of amounts escrowed for future real estate taxes, insurance, leasing costs, capital expenditures and debt service, as required by certain of our mortgage debts. Deferred Leasing Costs. Deferred leasing costs include brokerage, legal and other fees associated with the successful negotiation of leases and we amortize those costs, which are included in depreciation and amortization expense, on a straight line basis over the terms of the respective leases. Deferred leasing costs totaled $13,935 and $9,134 at December 31, 2013 and 2012, respectively, and accumulated amortization of deferred leasing costs totaled $2,317 and $1,514 at December 31 2013 and 2012, respectively. Future amortization of deferred leasing costs to be recognized during the current terms of our existing leases as of December 31, 2013, are estimated to be $1,913 in 2014, $1,844 in 2015, in $1,653 in 2016, $1,232 in 2017, $1,105 in 2018, and $3,871 thereafter. Deferred Financing Fees. Deferred financing fees include issuance or assumption costs related to borrowings and we amortize those costs as interest expense over the terms of the respective loans. At both December 31, 2013 and 2012, deferred financing fees totaled $9,335. Accumulated amortization of deferred financing fees totaled $5,424 and $3,617 at December 31, 2013 and 2012, respectively. Future amortization of deferred financing fees to be recognized with respect to our loans as of December 31, 2013, are estimated to be $1,807 in 2014, $1,536 in 2015, $449 in 2016, $45 in 2017, $33 in 2018, and $41 thereafter. Revenue Recognition. Rental income from operating leases is recognized on a straight line basis over the life of lease agreements. We increased rental income by $2,739, $3,428 and $1,565 to record revenue on a straight line basis during the years ended December 31, 2013, 2012 and 2011, respectively. Rents receivable include $10,515 and $7,776 of straight line rent receivables at December 31, 2013 and 2012, respectively. Income Taxes. We have elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended, or IRC, and, accordingly, we generally will not be subject to federal income taxes provided we distribute our taxable income and meet certain other requirements to qualify as a REIT. We are, however, subject to certain state and local taxes. Cumulative Other Comprehensive Income. Cumulative other comprehensive income consists of the unrealized gains (losses) related to our investment in AIC, as described in Note 5. Reclassifications. Certain reclassifications have been made to the prior years' financial statements to conform to the current year's presentation. Use of Estimates. Preparation of these financial statements in conformity with U.S. generally accepted accounting principles, or GAAP, requires us to make estimates and assumptions that may affect the amounts reported in these consolidated financial statements and related notes. The actual results could differ from these estimates. Net Income Per Share. We compute net income per common share using the weighted average number of common shares outstanding. We had no common share equivalents during the periods presented. Segment Reporting. We operate in one business segment: ownership of properties that are primarily leased to government tenants.

Note 2. Summary of Significant Accounting Policies

Basis of Presentation. These consolidated financial statements include the accounts of us and our subsidiaries, all of which are 100% owned directly or indirectly by us. All intercompany transactions and balances with or among our consolidated subsidiaries have been eliminated. Prior to our IPO, CWH directly or indirectly wholly owned us, and we have presented applicable transactions at CWH's historical basis.

We account for our investment in Affiliates Insurance Company, or AIC, using the equity method of accounting. Significant influence is present through common representation on the boards of trustees or directors of us and AIC. Our Managing Trustees are also owners of Reit Management & Research LLC, or RMR, which is the manager of us and AIC, and each of our Trustees is a director of AIC. See Note 5 for a further discussion of our investment in AIC.

Real Estate Properties. We record our Initial Properties at cost to CWH and our other properties at our cost and depreciate real estate investments on a straight line basis over estimated useful lives of up to 40 years for buildings and improvements, and up to 12 years for personal property.

We and CWH allocated the purchase prices of our properties to land, building and improvements based on determinations of the relative fair values of these assets assuming the properties are vacant. We and CWH determined the fair value of each property using methods similar to those used by independent appraisers. We and CWH allocated a portion of the purchase price of our properties to above market and below market leases based on the present value (using an interest rate which reflects the risks associated with acquired in place leases at the time each property was acquired by us or CWH) of the difference between (i) the contractual amounts to be paid pursuant to the acquired in place leases and (ii) our estimates of fair market lease rates for the corresponding leases, measured over a period equal to the terms of the respective leases. We and CWH allocated a portion of the purchase price to acquired in place leases and tenant relationships in an amount equal to the excess of (i) the purchase price paid for each property, after adjusting existing acquired in place leases to market rental rates, over (ii) the estimated fair value of the property, as if vacant. We and CWH allocated this aggregate value between acquired in place lease values and tenant relationships based on our evaluation of the specific characteristics of each tenant's lease. However, we have not separated the value of tenant relationships from the value of acquired in place leases because such value and related amortization expense is immaterial to the accompanying financial statements. In making these allocations, we considered factors such as estimated carrying costs during the expected lease up periods, including real estate taxes, insurance and other operating income and expenses and costs, such as leasing commissions, legal and other related expenses, to execute similar leases in current market conditions at the time a property was acquired by us or CWH. If the value of tenant relationships becomes material in the future, we may separately allocate those amounts and amortize the allocated amount over the estimated life of the relationships.

We amortize capitalized above market lease values (included in acquired in place real estate leases in our consolidated balance sheets) and below market lease values (presented as assumed real estate lease obligations in our consolidated balance sheets) as a reduction or increase, respectively, to rental income over the terms of the associated leases. Such amortization resulted in net decreases to rental income of $1,123, $2,056, and $725 during the years ended December 31, 2013, 2012 and 2011, respectively. We amortize the value of acquired in place leases (included in acquired real estate leases in our consolidated balance sheets), exclusive of the value of above market and below market acquired in place leases, over the terms of the associated leases. Such amortization, which is included in depreciation and amortization expense, amounted to $20,482, $17,390, and $12,182 during the years ended December 31, 2013, 2012 and 2011, respectively. When a lease is terminated prior to its stated expiration, we write off the unamortized amounts relating to that lease.

Capitalized above market lease values were $38,487 and $39,591 as of December 31, 2013 and 2012, respectively, net of accumulated amortization of $14,271 and $10,892, respectively. Capitalized below market lease values were $27,304 and $28,408 as of December 31, 2013 and 2012, respectively, net of accumulated amortization of $8,220 and $9,279, respectively.

The value of acquired in place leases, exclusive of the value of above and below market acquired in place leases, were $167,256 and $148,372 as of December 31, 2013 and 2012, respectively, net of accumulated amortization of $49,207 and $32,669, respectively. Future amortization of net intangible lease assets and liabilities, to be recognized over the current terms of the associated leases as of December 31, 2013 are estimated to be $23,566 in 2014, $21,209 in 2015, $18,453 in 2016, $16,174 and 2017, $13,521 in 2018 and $30,259 thereafter.

We regularly evaluate whether events or changes in circumstances have occurred that could indicate an impairment in the value of long lived assets. If there is an indication that the carrying value of an asset is not recoverable, we estimate the projected undiscounted cash flows to determine if an impairment loss should be recognized. We determine the amount of any impairment loss by comparing the historical carrying value to estimated fair value. We estimate fair value through an evaluation of recent financial performance and projected discounted cash flows using standard industry valuation techniques. In addition to consideration of impairment upon the events or changes in circumstances described above, we regularly evaluate the remaining lives of our long lived assets. If we change our estimate of the remaining lives, we allocate the carrying value of the affected assets over their revised remaining lives.

Cash and Cash Equivalents. We consider highly liquid investments with original maturities of three months or less at the date of purchase to be cash equivalents.

Restricted Cash. Restricted cash consists of amounts escrowed for future real estate taxes, insurance, leasing costs, capital expenditures and debt service, as required by certain of our mortgage debts.

Deferred Leasing Costs. Deferred leasing costs include brokerage, legal and other fees associated with the successful negotiation of leases and we amortize those costs, which are included in depreciation and amortization expense, on a straight line basis over the terms of the respective leases. Deferred leasing costs totaled $13,935 and $9,134 at December 31, 2013 and 2012, respectively, and accumulated amortization of deferred leasing costs totaled $2,317 and $1,514 at December 31 2013 and 2012, respectively. Future amortization of deferred leasing costs to be recognized during the current terms of our existing leases as of December 31, 2013, are estimated to be $1,913 in 2014, $1,844 in 2015, in $1,653 in 2016, $1,232 in 2017, $1,105 in 2018, and $3,871 thereafter.

Deferred Financing Fees. Deferred financing fees include issuance or assumption costs related to borrowings and we amortize those costs as interest expense over the terms of the respective loans. At both December 31, 2013 and 2012, deferred financing fees totaled $9,335. Accumulated amortization of deferred financing fees totaled $5,424 and $3,617 at December 31, 2013 and 2012, respectively. Future amortization of deferred financing fees to be recognized with respect to our loans as of December 31, 2013, are estimated to be $1,807 in 2014, $1,536 in 2015, $449 in 2016, $45 in 2017, $33 in 2018, and $41 thereafter.

Revenue Recognition. Rental income from operating leases is recognized on a straight line basis over the life of lease agreements. We increased rental income by $2,739, $3,428 and $1,565 to record revenue on a straight line basis during the years ended December 31, 2013, 2012 and 2011, respectively. Rents receivable include $10,515 and $7,776 of straight line rent receivables at December 31, 2013 and 2012, respectively.

Income Taxes. We have elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended, or IRC, and, accordingly, we generally will not be subject to federal income taxes provided we distribute our taxable income and meet certain other requirements to qualify as a REIT. We are, however, subject to certain state and local taxes.

Cumulative Other Comprehensive Income. Cumulative other comprehensive income consists of the unrealized gains (losses) related to our investment in AIC, as described in Note 5.

Reclassifications. Certain reclassifications have been made to the prior years' financial statements to conform to the current year's presentation.

Use of Estimates. Preparation of these financial statements in conformity with U.S. generally accepted accounting principles, or GAAP, requires us to make estimates and assumptions that may affect the amounts reported in these consolidated financial statements and related notes. The actual results could differ from these estimates.

Net Income Per Share. We compute net income per common share using the weighted average number of common shares outstanding. We had no common share equivalents during the periods presented.

Segment Reporting. We operate in one business segment: ownership of properties that are primarily leased to government tenants.