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Capital - Incentive and Share-based Compensation (Details) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) shares | Feb. 29, 2016 USD ($) vesting_installment shares | Jun. 30, 2015 USD ($) shares | Feb. 28, 2015 USD ($) vesting_installment shares | Jan. 31, 2015 USD ($) shares | Dec. 31, 2016 USD ($) $ / shares shares | Dec. 31, 2015 USD ($) $ / shares | Dec. 31, 2014 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  |  |  |  |  | $ 0.1 |
Period of service, upon completion of which, grantee's LTIP unit and restricted stock awards will immediately vest |  |  |  |  |  |  |  | 10 years
Expected volatility rate look-back period (in years) |  |  |  |  |  | 6 years |  |
Share-based compensation arrangement by share-based payment award, equity instrument other than options, forfeitures rate |  |  |  |  |  | 0.05 |  |
Weighted-average per unit or share fair value (in dollars per share) | $ / shares |  |  |  |  |  | $ 9.58 |  |
Age of grantee at which LTIP unit and restricted stock awards immediately vest |  |  |  |  |  |  |  | 60 years
Awards that Meet Age and Service Requirements for Vesting [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Noncash share-based compensation expense recognized |  |  |  |  |  | $ 0.7 | 0.5 | $ 0.2
Unrecognized compensation expense |  |  |  |  |  | $ 0.4 |  |
Unrecognized compensation expense, period for recognition (in years) |  |  |  |  |  | 1 year 10 months 21 days |  |
Awards that Do Not Meet Age and Service Requirements for Vesting [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Noncash share-based compensation expense recognized |  |  |  |  |  | $ 9.0 | 5.0 | 3.5
Unrecognized compensation expense |  |  |  |  |  | $ 18.5 |  |
Unrecognized compensation expense, period for recognition (in years) |  |  |  |  |  | 2 years 4 months 18 days |  |
Long-Term Incentive Plan Units and Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  |  |  |  | $ 18.4 | $ 6.6 |
Weighted-average per unit or share fair value (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 13.36 |
Fair value vested in period |  |  |  |  |  | $ 5.1 | $ 3.5 | 3.0
Long-Term Incentive Plan Unit [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  |  |  |  |  | 1,868,629 |  |
Time Based Long-Tern Incentive Plan Unit [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  | 47,168 |  | 33,398 |  |  |  |
Fair value of share-based awards granted in period |  | $ 1.4 |  | $ 0.8 |  | $ 0.1 |  |
Award vesting period (in years) |  | 4 years |  | 4 years |  |  |  |
Number of vesting installments (vesting installments) | vesting_installment |  | 3 |  | 3 |  |  |  |
Performance Based Long-Term Incentive Plan Unit [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  | 112,925 |  | 33,398 |  |  |  |
Fair value of share-based awards granted in period |  | $ 0.8 |  | $ 0.4 |  |  |  |
Award vesting period (in years) |  | 3 years |  | 3 years |  |  |  |
Number of vesting installments (vesting installments) | vesting_installment |  | 2 |  | 2 |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  |  |  |  |  | 47,071 |  |
Performance Restricted Shares [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  |  |  | 14,315 |  |  |  |
Time Restricted Shares [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  | 44,198 |  | 14,315 |  |  |  |
Long-Term Incentive Plan Unit and Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  |  |  |  |  |  | $ 5.4
Weighted-average per unit or share fair value (in dollars per share) | $ / shares |  |  |  |  |  | $ 9.60 |  | $ 10.65
Expected term |  |  |  |  |  | 2 years 9 months 8 days |  | 3 years
Risk free interest rate |  |  |  |  |  | 0.84% |  | 0.80%
Expected volatility rate |  |  |  |  |  | 24.00% |  | 26.00%
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected dividend rate |  |  |  |  |  | 2.10% | 1.90% | 2.60%
Director [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instrument other than options, forfeitures rate |  |  |  |  |  | 0 |  |
Director [Member] | Time Based Long-Tern Incentive Plan Unit [Member] | 2013 Plan Units Vesting June 2019 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares | 43,257 |  |  |  |  |  |  |
Fair value of share-based awards granted in period | $ 0.8 |  |  |  |  |  |  |
Award vesting period (in years) | 3 years |  |  |  |  |  |  |
Director [Member] | Time Based Long-Tern Incentive Plan Unit [Member] | 2013 Plan Units Vesting February 2018 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  |  | 35,082 |  |  |  |  |
Fair value of share-based awards granted in period |  |  | $ 0.6 |  |  |  |  |
Award vesting period (in years) |  |  | 3 years |  |  |  |  |
Executive Officer [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity instrument other than options, forfeitures rate |  |  |  |  |  | 0 |  |
Executive Officer [Member] | Time Based Long-Tern Incentive Plan Unit [Member] | 2013 Plan Units Vesting February 2020 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  | 368,225 |  |  |  |  |  |
Fair value of share-based awards granted in period |  | $ 5.6 |  |  |  |  |  |
Award vesting period (in years) |  | 4 years |  |  |  |  |  |
Number of vesting installments (vesting installments) | vesting_installment |  | 3 |  |  |  |  |  |
Executive Officer [Member] | Time Based Long-Tern Incentive Plan Unit [Member] | 2013 Plan Units Vesting February 2021 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  | 62,814 |  |  |  |  |  |
Fair value of share-based awards granted in period |  | $ 1.0 |  |  |  |  |  |
Award vesting percentage after three years |  | 30.00% |  |  |  |  |  |
Award vesting percentage after four years |  | 30.00% |  |  |  |  |  |
Award vesting percentage after five years |  | 40.00% |  |  |  |  |  |
Executive Officer [Member] | Time Based Long-Tern Incentive Plan Unit [Member] | 2013 Plan Units Vesting February 2018 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  |  |  | 13,736 |  |  |  |
Fair value of share-based awards granted in period |  |  |  | $ 0.2 |  |  |  |
Award vesting period (in years) |  |  |  | 4 years |  |  |  |
Number of vesting installments (vesting installments) | vesting_installment |  |  |  | 3 |  |  |  |
Executive Officer [Member] | Time Based Long-Tern Incentive Plan Unit [Member] | 2013 Plan Units Vesting January 2018 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  |  |  | 168,033 |  |  |  |
Fair value of share-based awards granted in period |  |  |  | $ 2.9 |  |  |  |
Award vesting period (in years) |  |  |  | 4 years |  |  |  |
Number of vesting installments (vesting installments) | vesting_installment |  |  |  | 3 |  |  |  |
Executive Officer [Member] | Performance Based Long-Term Incentive Plan Unit [Member] | 2013 Plan Units Vesting February 2020 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  | 1,230,228 |  |  |  |  |  |
Fair value of share-based awards granted in period |  | $ 8.8 |  |  |  |  |  |
Award vesting period (in years) |  | 3 years |  |  |  |  |  |
Number of vesting installments (vesting installments) | vesting_installment |  | 2 |  |  |  |  |  |
Executive Officer [Member] | Performance Based Long-Term Incentive Plan Unit [Member] | 2013 Plan Units Vesting February 2018 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  |  |  | 13,736 |  |  |  |
Fair value of share-based awards granted in period |  |  |  | $ 0.1 |  |  |  |
Award vesting period (in years) |  |  |  | 3 years |  |  |  |
Number of vesting installments (vesting installments) | vesting_installment |  |  |  | 2 |  |  |  |
Executive Officer [Member] | Performance Based Long-Term Incentive Plan Unit [Member] | 2013 Plan Units Vesting January 2018 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  |  |  | 154,266 |  |  |  |
Fair value of share-based awards granted in period |  |  |  | $ 1.3 |  |  |  |
Award vesting period (in years) |  |  |  | 3 years |  |  |  |
Number of vesting installments (vesting installments) | vesting_installment |  |  |  | 2 |  |  |  |
Employee [Member] | Time Based Long-Tern Incentive Plan Unit [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares granted (in shares) | shares |  |  |  |  | 9,531 |  |  |
Fair value of share-based awards granted in period |  |  |  |  | $ 0.2 |  |  |
2013 Plan [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares authorized under the plan (in shares) | shares |  |  |  |  |  | 12,200,000 |  |
Number of shares that remain available for future issuance (in shares) | shares |  |  |  |  |  | 8,300,000 |  |
Maximum [Member] | Long-Term Incentive Plan Unit and Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Expected term |  |  |  |  |  |  | 3 years |
Risk free interest rate |  |  |  |  |  |  | 1.00% |
Expected volatility rate |  |  |  |  |  |  | 29.00% |
Minimum [Member] | Long-Term Incentive Plan Unit and Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Expected term |  |  |  |  |  |  | 2 years 10 months 24 days |
Risk free interest rate |  |  |  |  |  |  | 0.80% |
Expected volatility rate |  |  |  |  |  |  | 24.00% |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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