Share-Based Compensation Plan (Details Textual) $ / shares in Units, $ in Thousands											3 Months Ended		6 Months Ended
	Feb. 15, 2017 shares	Jan. 03, 2017 shares	Feb. 10, 2016 shares	Jan. 06, 2016 shares	Jul. 27, 2015 shares	Feb. 11, 2015 shares	Feb. 04, 2014 shares	Dec. 13, 2013 USD ($) $ / shares shares	Jan. 30, 2013 shares	Dec. 14, 2009 $ / shares shares	Jun. 30, 2017 USD ($) shares	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Classes shares	Jun. 30, 2016 USD ($)	Dec. 31, 2016 shares
Share-Based Compensation Plan (Textual) [Abstract]
Share-based award vesting period													6 years
Number of common shares available for issuance under the 2009 Equity Incentive Plan											1,283,293		1,283,293
Operating Partnership outstanding											236,351		236,351		236,351
LTIP units, vested											100,222		100,222
Restricted Stock [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Allocated Share-based Compensation Expense | $											$ 500	$ 400	$ 900	$ 900
Total unrecognized compensation cost | $											3,200		$ 3,200
Weighted average remaining vesting period (in years)													2 years
Share-based equity award grant													58,839
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period													57,559
Restricted Stock [Member] | Minimum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based award vesting period													3 years
Restricted Stock [Member] | Maximum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based award vesting period													5 years
Performance Shares [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Allocated Share-based Compensation Expense | $											1,300	1,300	$ 1,700	2,500
Total unrecognized compensation cost | $											8,400		$ 8,400
Weighted average remaining vesting period (in years)													1 year 10 months
Performance Shares [Member] | January 2013 [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based equity award grant									72,118
Performance Shares [Member] | January 2013 [Member] | Officer Awards [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				120,730
Performance Shares [Member] | January 2013 [Member] | Nonexecutive management award [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				56,562
Performance Shares [Member] | December 2013 [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based equity award grant								252,088
Performance Shares [Member] | December 2013 [Member] | Minimum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Estimated shares expected to vest								0.00%
Performance Shares [Member] | December 2013 [Member] | Maximum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Estimated shares expected to vest								200.00%
Performance Shares [Member] | December 2013 - Tranche 1 [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based equity award grant				50,418
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				25,134
Estimated shares expected to vest				49.00%
Performance Shares [Member] | December 2013 - Tranche 2 [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based equity award grant		49,914
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period		12,285
Estimated shares expected to vest		25.00%
Performance Shares [Member] | February 2014 [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based equity award grant							66,483
Performance Shares [Member] | February 2014 [Member] | Officer Awards [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period		112,782
Performance Shares [Member] | February 2014 [Member] | Nonexecutive management award [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period		25,619
Performance Shares [Member] | February 2015 [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based equity award grant						44,962
Shares expected to vest, not subject to maximum						8,559
Performance Shares [Member] | February 2015 [Member] | Minimum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Estimated shares expected to vest						0.00%
Performance Shares [Member] | February 2015 [Member] | Maximum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Estimated shares expected to vest						200.00%
Performance Shares [Member] | July 2015 [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based equity award grant					771
Performance Shares [Member] | February 2016 [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based equity award grant			100,919
Shares expected to vest, not subject to maximum			17,372
Performance Shares [Member] | February 2016 [Member] | Minimum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Estimated shares expected to vest			0.00%
Performance Shares [Member] | February 2016 [Member] | Maximum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Estimated shares expected to vest			200.00%
Performance Shares [Member] | February 2017 [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based equity award grant	81,939
Performance Shares [Member] | February 2017 [Member] | Minimum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Estimated shares expected to vest	0.00%
Performance Shares [Member] | February 2017 [Member] | Maximum [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Estimated shares expected to vest	200.00%
Long Term Incentive Partnership Units Class A [Member]
Share-Based Compensation Plan (Textual) [Abstract]
LTIP Units Granted										929,099
Value of LTIP grants per share | $ / shares										$ 8.50
Long Term Incentive Partnership Units Class B [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Share-based award vesting period													5 years
LTIP Units Granted								226,882
Value of LTIP grants per share | $ / shares								$ 29.19
Grant date fair value of LTIP unit awards | $								$ 6,600
Long Term Incentive Partnership Units [Member]
Share-Based Compensation Plan (Textual) [Abstract]
Allocated Share-based Compensation Expense | $											300	$ 300	$ 600	$ 600
Classes of LTIP Units | Classes													2
Total unrecognized compensation cost | $											$ 2,700		$ 2,700
Weighted average remaining vesting period (in years)													1 year 4 months