Share-Based Payment - Summary of Pre-Tax Share-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Selling, General and Administrative Expenses
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 381	$ 1,865	[1]

[1] Decrease in share-based compensation expense was primarily due to additional expense recognized during the three months ended March 31, 2016 related to a change in control in connection with the Tahoe Transaction in March 2016 (see Note 3). This includes cash paid of $463 related to market performance RSUs, granted to executive management, which vested upon a change in control of the Company under the terms of the RSU award agreement.