Correction of Accounting Error in Prior Period - (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement
Inventory, Net	$ 117,001	$ 109,408
Total current assets	232,318	229,957
Total assets	291,150	281,784
Accumulated deficit	(335,669)	(342,705)
Total stockholders' equity	197,928	183,764
Total liabilities and stockholders' equity	$ 291,150	281,784
Previously Reported
Error Corrections and Prior Period Adjustments Restatement
Inventory, Net		115,904	$ 104,063
Total current assets		236,453	185,135
Total assets		288,280	227,654
Accumulated deficit		(336,209)	(350,887)
Total stockholders' equity		190,260	168,352
Total liabilities and stockholders' equity		288,280	227,654
Adjusted
Error Corrections and Prior Period Adjustments Restatement
Inventory, Net		109,408	97,567
Total current assets		229,957	178,639
Total assets		281,784	221,158
Accumulated deficit		(342,705)	(357,383)
Total stockholders' equity		183,764	161,856
Total liabilities and stockholders' equity		281,784	221,158
Effect of Change
Error Corrections and Prior Period Adjustments Restatement
Inventory, Net		(6,496)	(6,496)
Total current assets		(6,496)	(6,496)
Total assets		(6,496)	(6,496)
Accumulated deficit		(6,496)	(6,496)
Total stockholders' equity		(6,496)	(6,496)
Total liabilities and stockholders' equity		$ (6,496)	$ (6,496)