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Share-Based Compensation (Details) $ / shares in Units, $ in Thousands			3 Months Ended					6 Months Ended
	Feb. 07, 2017 $ / shares	Feb. 10, 2016 $ / shares	Jun. 30, 2017 USD ($) plan $ / shares shares	Mar. 31, 2017 $ / shares shares	Jun. 30, 2016 USD ($)	Mar. 31, 2016 $ / shares shares	Mar. 31, 2015 $ / shares shares	Jun. 30, 2017 USD ($) installment plan $ / shares shares	Jun. 30, 2016 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based compensation plans | plan			1					1
Number of shares authorized under plan | shares			10,400,000					10,400,000
Share-based compensation cost capitalized as part of real estate assets | $			$ 85		$ 77			$ 214	$ 191
Weighted-Average Grant Date Fair Value
Unrecognized compensation cost related to nonvested stock awards | $			7,652					$ 7,652
Compensation cost to be recognized over a weighted average period								2 years 9 months 55 days
Vested at conclusion of performance period
Weighted-Average Grant Date Fair Value
Vesting percentage								60.00%
Remaining percentage after performance period
Weighted-Average Grant Date Fair Value
Vesting percentage								40.00%
Vested each year for the first two anniversaries after conclusion of performance period
Weighted-Average Grant Date Fair Value
Vesting percentage								20.00%
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $			$ 933		707			$ 2,363	1,948
Shares
Nonvested, beginning of period (in shares) | shares				602,162				602,162
Granted (in shares) | shares								326,424
Vested (in shares) | shares								(245,409)
Forfeited (in shares) | shares								(6,440)
Nonvested, end of period (in shares) | shares			676,737					676,737
Weighted-Average Grant Date Fair Value
Weighted average grant date fair value, nonvested, beginning of period (in dollars per share) | $ / shares				$ 15.41				$ 15.41
Weighted average grant date fair value, granted (in dollars per share) | $ / shares								10.75
Weighted average grant date fair value, vested (in dollars per share) | $ / shares								14.79
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares								13.20
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares			$ 13.41					$ 13.41
Number of annual installment for awards to vest | installment								4
Restricted Stock Awards | Vested on date of grant
Weighted-Average Grant Date Fair Value
Vesting percentage								20.00%
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $			$ 385		$ 258			$ 729	$ 516
Shares
Granted (in shares) | shares				277,376		282,995	138,680
Weighted-Average Grant Date Fair Value
Weighted average grant date fair value, granted (in dollars per share) | $ / shares				$ 6.86		$ 4.98	$ 15.52
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares	$ 6.86	$ 4.98
Unrecognized compensation cost related to nonvested stock awards | $			$ 2,934					$ 2,934
Performance period (in years)								3 years
Risk-free interest rate (as a percent)	1.53%	0.92%
Expected share price volatility (as a percent)	32.85%	30.95%
Chief Executive Officer
Shares
Granted (in shares) | shares				115,082
Weighted-Average Grant Date Fair Value
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares	$ 5.62
Officer
Shares
Granted (in shares) | shares				162,294
Weighted-Average Grant Date Fair Value
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares	$ 7.74

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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.

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Unrecognized cost of unvested share-based compensation awards.

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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.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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