Stock-Based Compensation	3 Months Ended
Stock-Based Compensation	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION The Company has several types of stock-based compensation - stock options, restricted stock, and restricted stock units (“RSUs”) - which are described in note 12 of notes to consolidated financial statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2015. The expense related to a portion of the stock-based compensation awards is fixed. The expense related to other stock-based compensation awards fluctuates from period to period dependent, in part, on the Company's stock price and stock performance relative to its peers. The Company recorded stock-based compensation expense, net of forfeitures, of $4.3 million and reversed $87,000 in compensation expense for the three months ended March 31, 2016 and 2015, respectively. The Company maintains the 2009 Incentive Stock Plan (the "2009 Plan") and the 2005 Restricted Stock Unit Plan (the “RSU Plan”). Under the 2009 Plan, the Company made restricted stock grants in 2016 of 230,871 shares to key employees, which vest ratably over a three-year period. Under the RSU Plan, the Company awarded two types of performance-based RSUs to key employees based on the following metrics: (1) Total Stockholder Return of the Company, as defined in the RSU Plan, as compared to the companies in the SNL US REIT Office index (“TSR RSUs”), and (2) the ratio of cumulative funds from operations per share to targeted cumulative funds from operations per share (“FFO RSUs”) as defined in the RSU Plan. The performance period for both awards is January 1, 2016 to December 31, 2018, and the targeted units awarded of TSR RSUs and FFO RSUs is 212,102 and 96,569, respectively. The ultimate payout of these awards can range from 0% to 200% of the targeted number of units depending on the achievement of the market and performance metrics described above. Both of these RSUs cliff vest on January 29, 2019 and are to be settled in cash with payment dependent on upon attainment of required service, market, and performance criteria. The number of RSUs vesting will be determined at that date, and the payout per unit will be equal to the average closing price on each trading day during the 30-day period ending on December 31, 2018. The Company expenses an estimate of the fair value of the TSR RSUs over the performance period using a quarterly Monte Carlo valuation. The FFO RSUs are expensed over the vesting period using the fair market value of the Company's stock at the reporting date multiplied by the anticipated number of units to be paid based on the current estimate of what the ratio is expected to be upon vesting. Dividend equivalents on the TSR RSUs and the FFO RSUs will also be paid based upon the percentage vested.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.