Share-Based Compensation - Summary of Information about Restricted Stock Grants Outstanding (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unearned compensation	$ 3.1
November 2013
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	470,997
Unearned compensation	$ 0.2
Remaining Periods (in months)	4 months
October 2014
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	506,171
Unearned compensation	$ 1.0
Remaining Periods (in months)	16 months
April 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	27,174
Unearned compensation	$ 0.1
Remaining Periods (in months)	16 months
July 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	38,772
Unearned compensation	$ 0.2
Remaining Periods (in months)	28 months
October 2015 | Tranche One
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	595,509
Unearned compensation	$ 1.3
Remaining Periods (in months)	28 months
October 2015 | Tranche Two
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	138,888
Unearned compensation	$ 0.1
Remaining Periods (in months)	4 months
January 2016
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	23,852
Unearned compensation	$ 0.1
Remaining Periods (in months)	28 months
March 2016
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	38,758
Unearned compensation	$ 0.1
Remaining Periods (in months)	28 months