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Long-Term Compensation Plan and Stock Based Compensation - Additional Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2017
Restricted Stock, subject to performance criteria
Long-Term Compensation Plan and Stock Based Compensation
Unissued shares	140			140
Restricted Stock, time-based
Long-Term Compensation Plan and Stock Based Compensation
Stock based compensation awards issued shares				120
2009 Equity Incentive Plan \| Restricted Stock
Long-Term Compensation Plan and Stock Based Compensation
Stock based compensation Awards		23	237
Stock based compensation awards issued shares	0
2009 Equity Incentive Plan \| Restricted Stock, subject to performance criteria
Long-Term Compensation Plan and Stock Based Compensation
Unissued shares		14	126
Vesting period of stock awards				3 years
Fair value of nonvested awards				$ 2,046
2009 Equity Incentive Plan \| Restricted Stock, time-based
Long-Term Compensation Plan and Stock Based Compensation
Stock based compensation awards issued shares		9	111
Restricted stock awards, fair value				$ 1,764
2009 Equity Incentive Plan \| Restricted Stock, time-based \| Minimum
Long-Term Compensation Plan and Stock Based Compensation
Vesting period of stock awards				1 year
2009 Equity Incentive Plan \| Restricted Stock, time-based \| Maximum
Long-Term Compensation Plan and Stock Based Compensation
Vesting period of stock awards				4 years