Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Summary of Components of Accumulated Other Comprehensive Income (Loss), Net of Tax (Details)

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Fair Value of Financial Instruments - Summary of Components of Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance $ (35)  
Other comprehensive gain (loss), net of tax 61 $ (81)
Ending Balance 26  
Unrealized Gains (Losses) on Available-for-sale Investments    
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance (82)  
Other comprehensive gain (loss), net of tax 64  
Ending Balance (18)  
Unrealized Gains (Losses) on Cash Flow Hedges    
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance 47  
Other comprehensive gain (loss), net of tax (3)  
Ending Balance $ 44