Share Based Compensation, 401(k) Plan and Deferred Compensation - Restricted Share Activity (Details) - Restricted Share Awards [Member]	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-vested at January 1, 2016, shares | shares	506,147
Granted, shares | shares	227,845
Vested, shares | shares	(195,140)
Forfeited, shares | shares	(50,248)
Non-vested at December 31, 2016, shares | shares	488,604
Non-vested at January 1, 2016, Weighted Average Grant Date Fair Value | $ / shares	$ 14.50
Granted, Weighted Average Grant Date Fair Value | $ / shares	12.92
Vested, Weighted Average Grant Date Fair Value | $ / shares	13.50
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	15.03
Non-vested at December 31, 2016, Weighted Average Grant Date Fair Value | $ / shares	$ 14.10
Non-vested at January 1, 2016, Aggregate Intrinsic Value | $	$ 6,913,968
Granted, Aggregate Intrinsic Value | $	2,937,771
Vested, Aggregate Intrinsic Value | $	2,813,799
Non-vested at December 31, 2016, Aggregate Intrinsic Value | $	$ 8,066,852