Investment in Office Properties (Tables)

12 Months Ended

Dec. 31, 2015

Business Acquisition [Line Items]

Schedule of unaudited pro forma results of operations

The unaudited pro forma effect on the Company's results of operations for the purchase of JTB Center, Courvoisier Centre, One Orlando Centre, Millenia Park One, The Forum at West Paces, Corporate Center I, Corporate Center II, Corporate Center III, One Congress Plaza and San Jacinto Center as if the purchases had occurred on January 1, 2013 is as follows (in thousands, except per share data):

	Year Ended
	December 31,
	2014		2013
	(Unaudited)
Revenues	$	493,708	$	370,980
Net income (loss) attributable to common stockholders	$	39,873	$	(18,471	)
Basic net income (loss) attributable to common stockholders	$	0.39	$	(0.28	)
Diluted net income (loss) attributable to common stockholders	$	0.37	$	(0.28	)

The Company's unaudited pro forma results of operations after giving effect to the purchases of One Buckhead Plaza, Harborview Plaza and Two Buckhead Plaza as if the purchases had occurred on January 1, 2014 is as follows (in thousands, except per share data):

	Year Ended
	December 31,
	2015		2014
	(Unaudited)
Revenues	$	486,680	$	489,312
Net income attributable to common stockholders	$	67,789	$	45,886
Basic net income attributable to common stockholders	$	0.61	$	0.45
Diluted net income attributable to common stockholders	$	0.61	$	0.45

Schedule of obligations for tenant improvement allowances and lease commission costs for leases in place and commitments for building improvements

Obligations for tenant improvement allowances and lease commission costs for leases in place and commitments for building improvements at December 31, 2015 are as follows (in thousands):

2016	$	56,708
2017	2,377
2018	10
2019	114
2020	3,007
Thereafter	25
Total	$	62,241

Schedule of minimum future operating lease payments

Minimum future operating lease payments for various equipment leased at the office properties is as follows for operating leases in place at December 31, 2015 (in thousands):

2016	$	163
2017	122
2018	72
2019	9
2020	—
Total	$	366

Schedule of future minimum rental receipts

The following is a schedule by year of future minimum rental receipts under noncancelable leases for office buildings owned at December 31, 2015 (in thousands):

2016	$	358,388
2017	361,162
2018	332,595
2019	297,855
2020	267,131
Thereafter	1,119,145
Total	$	2,736,276

Schedule of future minimum ground lease payments

The following is a schedule by year of future minimum ground lease payments at December 31, 2015 (in thousands):

2016	$	1,264
2017	1,294
2018	1,294
2019	1,294
2020	1,296
Thereafter	91,378
Total	$	97,820

2015 Acquisitions

Business Acquisition [Line Items]

Schedule of aggregate preliminary purchase price assignment related to tangible and intangible assets and liabilities

The aggregate preliminary purchase price assignment related to tangible and intangible assets and liabilities based on Level 2 and Level 3 inputs for One Buckhead Plaza, Harborview Plaza and Two Buckhead Plaza is as follows (in thousands):

	Amount
Land	$	41,524
Buildings	224,716
Tenant improvements	11,982
Lease commissions	8,210
Lease in place value	16,108
Above market leases	2,026
Below market leases	(14,426		)
Mortgage premium for mortgage assumed	(4,140		)

2014 Acquisitions

Business Acquisition [Line Items]

Schedule of aggregate preliminary purchase price assignment related to tangible and intangible assets and liabilities

The following table summarizes the aggregate purchase price assignments for JTB Center, Courvoisier Centre⁽¹⁾, One Orlando Centre, Millenia Park One, The Forum at West Paces, Corporate Center I, Corporate Center II, Corporate Center III, Corporate Center land and leasehold improvements, One Congress Plaza and San Jacinto Center (in thousands):

	Amount
Land	$	146,602
Buildings	617,807
Tenant improvements	46,146
Lease commissions	17,575
Lease in place value	47,070
Above market leases	10,272
Above (below) market ground leases, net	16,687
Below market leases	(21,433		)
Mortgage premium for mortgages assumed	(18,251		)

(1) The purchase price of Courvoisier Centre was reduced by $5.3 million of credits from the seller.