Share-Based Compensation (Details) | 12 Months Ended |
Dec. 31, 2015USD ($)Rate$ / sharesshares | Dec. 31, 2014USD ($)$ / sharesshares | Dec. 31, 2013USD ($)$ / sharesshares | Dec. 31, 2012$ / sharesshares |
Share-based compensation, allocation and classification in financial statements [Abstract] | | | | |
Compensation cost charged to income for the Company's share-based compensation plans | $ | $ 12,100,000 | $ 17,100,000 | $ 12,900,000 | |
Reversal of Prior Period Share Based Compensation Expense | $ | 2,000,000 | | | |
Compensation cost capitalized as part of properties and deferred leasing costs | $ | $ 2,300,000 | 2,000,000 | $ 1,600,000 | |
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost | $ | | $ 4,500,000 | | |
2008 Omnibus Plan [Member] | | | | |
Deferred compensation arrangements [Abstract] | | | | |
Aggregate number of Company common shares or Operating Partnership units approved for awards under the 2008 Omnibus Plan, original (in shares) | 8,500,000 | | | |
The ratio at which non-option awards granted after the May 2010 amendment are deducted from the shares available for grant | Rate | 1.85 | | | |
The ratio at which non-option awards granted prior to the May 2010 amendment are deducted from the shares available for grant | Rate | 2.85 | | | |
The ratio at which options awards granted are deducted from the shares available for grant | one-for-one | | | |
Employee Stock Option [Member] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term | 1 year 4 months 24 days | 1 year 7 months 6 days | 2 years 7 months 6 days | 3 years 9 months 18 days |
Summary of option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award | ten-year | | | |
Summary of option activity [Roll Forward] | | | | |
Outstanding options at beginning of period (in shares) | 521,293 | 563,436 | 689,802 | |
Exercised, Number of Options | (228,750) | (42,143) | (126,366) | |
Outstanding options at end of period (in shares) | 292,543 | 521,293 | 563,436 | 689,802 |
Outstanding at beginning of period, weighted average exercise price (in dollars per share) | $ / shares | $ 39.20 | $ 43.81 | $ 42.50 | |
Exercised, weighted average exercise price (in dollars per share) | $ / shares | 29.72 | 42.16 | 36.67 | |
Outstanding at end of period, weighted average exercise price (in dollars per share) | $ / shares | 46.60 | 39.20 | 43.81 | $ 42.50 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ / shares | 35.50 | 26.56 | 31.31 | 24.74 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ / shares | $ 51.15 | $ 51.15 | $ 55.90 | $ 55.90 |
Fully vested options, number (in shares) | 292,543 | | | |
Fully vested options, weighted average exercise price (in dollars per share) | $ / shares | $ 46.60 | | | |
Fully vested options, weighted average remaining contractual term (in years) | 1 year 4 months 24 days | | | |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options | $ | $ 0 | | | |
Aggregate intrinsic value of in-the-money options outstanding | $ | 8,800,000 | | | |
Total intrinsic value of options exercised during the period | $ | 10,000,000 | $ 1,400,000 | $ 4,800,000 | |
Cash received from options exercised during the period | $ | $ 6,800,000 | $ 1,800,000 | $ 4,600,000 | |
Unissued Partnership Units Under Unit Option Deferral Election Member | | | | |
Employee service share-based compensation, aggregate disclosures [Abstract] | | | | |
Options exercised under unit option deferral election plan (in shares) | 3,000,000 | | | |
The number of mature units tendered for the exercise of previously issued stock options under the unit option deferral election plan (in shares) | 2,100,000 | | | |
The number of units deferred under the unit option deferral election upon the exercise of previously issued stock options (in shares) | 900,000 | | | |
Date at which deferred partnership units begin to be issued | December 2,017 | | | |
Number of Annual Installments during which Deferred Partnership Units will be issued | ten | | | |
2014 Option Modification [Domain] | | | | |
Share-based compensation, allocation and classification in financial statements [Abstract] | | | | |
Common Stock, Dividends, Per Share, Cash Paid | $ / shares | | $ 4.75 | | |
Summary of option activity [Roll Forward] | | | | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit | $ / shares | | 26.56 | | |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit | $ / shares | | $ 51.15 | | |
Employee service share-based compensation, aggregate disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum | | 13.62% | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum | | 19.14% | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | | 2.70% | | |
Performance Shares [Member] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Description | Each PSU represents the right to receive, upon vesting, shares of the Company’s common stock ranging from 0-300% of the PSU based on the Company’s market performance relative to that of a peer group. The 2015 PSU grant includes a cash payment upon vesting equal to the aggregate cash dividends that would have been paid on such shares of common stock from the date of grant of the award to the vesting date | Each PSU represents the right to receive, upon vesting, shares of the Company’s common stock ranging from 0-300% of the PSU based on the Company’s market performance relative to that of a peer group. No dividends accumulate during the vesting period. | Each PSU represents the right to receive, upon vesting, shares of the Company’s common stock ranging from 0-300% of the PSU based on the Company’s market performance relative to that of a peer group. No dividends accumulate during the vesting period.
| |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | 1.12% | 0.70% | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years | 3 years | | |
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Vested At End Of Period | 0 | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested | $ | $ 0 | $ 5,300,000 | $ 16,900,000 | |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized | $ | $ 8,400,000 | | | |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition | 1 year 6 months 15 days | | | |
Summary of non-option activity [Roll Forward] | | | | |
Outstanding at beginning of period (in shares) | 254,651 | 234,863 | 262,740 | |
Granted (in shares) | 50,256 | 49,157 | | |
Forfeited (in shares) | (5,854) | (771) | (12,240) | |
Outstanding at end of period (in shares) | 255,478 | 254,651 | 234,863 | 262,740 |
Outstanding at beginning of period, weighted average grant date fair value (in dollars per share) | $ / shares | $ 132.86 | $ 139.18 | $ 122.52 | |
Granted, weighted average grant date fair value (in dollars per share) | $ / shares | 112.30 | 93.07 | | |
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares | $ 174.95 | $ 160.09 | $ 140.49 | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period | 43,575 | 43,858 | 73,259 | |
Vested, weighted average grant date fair value (in dollars per share) | $ / shares | $ 97.44 | $ 85.40 | $ 65.29 | |
Outstanding at end of period, weighted average grant date fair value (in dollars per share) | $ / shares | $ 134.52 | $ 132.86 | $ 139.18 | $ 122.52 |
Right to Receive Upon Vesting Shares of Common Stock as Percentage of PSU, Actual Vested During Period | 0.00% | 172.00% | 300.00% | |
2014 PSU Grant Modification [Domain] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum | | 0.03% | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum | | 0.65% | | |
Summary of non-option activity [Roll Forward] | | | | |
Granted (in shares) | | 15,260 | | |
Granted, weighted average grant date fair value (in dollars per share) | $ / shares | | $ 57 | | |
Restricted Stock Units (RSUs) [Member] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Description | represent the right to receive upon vesting one share of the Company’s common stock. The 2015 grants also receive a cash payment upon vesting equal to the aggregate cash dividends that would have been paid on such shares of common stock from the date of grant of the award to the vesting date | Represent the right to receive upon vesting one share of the Company’s common stock. No dividends accumulate during the vesting period. | Represent the right to receive upon vesting one share of the Company’s common stock. No dividends accumulate during the vesting period.
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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeiture Assumption | 2.00% | | | |
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Vested At End Of Period | 0 | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested | $ | $ 7,000,000 | $ 7,400,000 | $ 10,600,000 | |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized | $ | $ 6,300,000 | | | |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition | 1 year 9 months 18 days | | | |
Summary of non-option activity [Roll Forward] | | | | |
Outstanding at beginning of period (in shares) | 293,651 | 269,899 | 322,305 | |
Granted (in shares) | 100,682 | | | |
Forfeited (in shares) | (14,542) | (4,843) | (11,678) | |
Outstanding at end of period (in shares) | 283,353 | 293,651 | 269,899 | 322,305 |
Outstanding at beginning of period, weighted average grant date fair value (in dollars per share) | $ / shares | $ 67 | $ 62 | $ 48.19 | |
Granted, weighted average grant date fair value (in dollars per share) | $ / shares | 74.36 | | | |
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares | $ 69.87 | $ 65.44 | $ 57.60 | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period | 96,438 | 104,302 | 138,028 | |
Vested, weighted average grant date fair value (in dollars per share) | $ / shares | $ 65.60 | $ 51.96 | $ 37.03 | |
Outstanding at end of period, weighted average grant date fair value (in dollars per share) | $ / shares | $ 69.93 | $ 67 | $ 62 | $ 48.19 |
2014 RSU Grant Modification [Domain] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum | | 0.03% | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum | | 0.65% | | |
Non-Employee Directors' Deferred Compensation Plan [Member] | | | | |
Non-Employee Directors' Stock Grant And Deferred Compensation [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost | $ | $ 125,000 | $ 120,000 | $ 120,000 | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity, Instruments Other than Options, Outstanding | 14,502 | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number | 128,696 | | | |
Other Employee Plans [Member] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Defined Contribution Plan, Cost Recognized | $ | $ 2,900,000 | $ 3,300,000 | $ 3,200,000 | |
Minimum [Member] | 2014 Option Modification [Domain] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | | 0.07% | | |
Share-based Compensation Arrangement by Share-based Payment Award, Vesting Period | | 0.46 | | |
Minimum [Member] | 2014 PSU Grant Modification [Domain] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Vesting Period | | 0.24 | | |
Minimum [Member] | 2014 RSU Grant Modification [Domain] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Vesting Period | | 0.24 | | |
Minimum [Member] | Other Employee Plans [Member] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Defined Contribution Plan, Contribution Percent | 2.00% | | | |
Maximum [Member] | 2014 Option Modification [Domain] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | | 0.98% | | |
Share-based Compensation Arrangement by Share-based Payment Award, Vesting Period | | 3.24 | | |
Maximum [Member] | 2014 PSU Grant Modification [Domain] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Vesting Period | | 2.25 | | |
Maximum [Member] | 2014 RSU Grant Modification [Domain] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Vesting Period | | 2.25 | | |
Maximum [Member] | Other Employee Plans [Member] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Defined Contribution Plan, Contribution Percent | 7.00% | | | |
Share-based Compensation Award, Tranche One [Member] | Performance Shares [Member] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum | | | 0.30% | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum | | | 0.40% | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | 3 years | |
Summary of non-option activity [Roll Forward] | | | | |
Granted (in shares) | | | 42,178 | |
Granted, weighted average grant date fair value (in dollars per share) | $ / shares | | | $ 103.37 | |
Share-based Compensation Award, Tranche One [Member] | Restricted Stock Units (RSUs) [Member] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum | | 0.70% | 0.30% | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum | | | 0.49% | |
Summary of non-option activity [Roll Forward] | | | | |
Granted (in shares) | | 106,540 | 92,103 | |
Granted, weighted average grant date fair value (in dollars per share) | $ / shares | | $ 63.95 | $ 71.67 | |
2014 RSU Grant Modification [Domain] | Restricted Stock Units (RSUs) [Member] | | | | |
Summary of non-option activity [Roll Forward] | | | | |
Granted (in shares) | | 17,852 | | |
Granted, weighted average grant date fair value (in dollars per share) | $ / shares | | $ 72.27 | | |
Share-based Compensation Award, Tranche Two [Member] | Performance Shares [Member] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Description | | | represent the right to receive, upon vesting, shares of the Company’s common stock ranging from 0-400% of the PSU based on the Company’s market performance relative to that of a peer group. No dividends accumulate during the vesting period. | represent the right to receive, upon vesting, shares of the Company’s common stock ranging from 0-400% of the PSU based on the Company’s market performance relative to that of a peer group. No dividends accumulate during the vesting period. |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum | | | 0.46% | 0.70% |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum | | | 0.62% | 0.90% |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | 4 years | 5 years |
Summary of non-option activity [Roll Forward] | | | | |
Granted (in shares) | | | 15,444 | |
Granted, weighted average grant date fair value (in dollars per share) | $ / shares | | | $ 171.05 | $ 189.23 |
Share-based Compensation Award, Tranche Two [Member] | Restricted Stock Units (RSUs) [Member] | | | | |
Summary of non-option activity, additional disclosures [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Description | | represent the right to receive upon vesting one share of the Company’s common stock | represent the right to receive upon vesting one share of the Company’s common stock | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum | | 0.13% | 0.10% | |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum | | 0.71% | 0.19% | |
Summary of non-option activity [Roll Forward] | | | | |
Granted (in shares) | | 8,505 | 5,197 | |
Granted, weighted average grant date fair value (in dollars per share) | $ / shares | | $ 66.19 | $ 81.38 | |
Special Dividend [Member] | | | | |
Share-based compensation, allocation and classification in financial statements [Abstract] | | | | |
Common Stock, Dividends, Per Share, Cash Paid | $ / shares | | $ 4.75 | | |
Series B Preferred Stock [Member] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Preferred Stock, Voting Rights | Each share of Series B Preferred Stock entitles the holder to one vote on all matters submitted to the Company's shareowners. The holders of Series B Preferred Stock, voting as a class, have the right to designate up to four nominees for election as directors of the Company. On all other matters, including the election of directors, the holders of Series B Preferred Stock will vote with the holders of common stock. | | | |