XML 60 R49.htm IDEA: XBRL DOCUMENT v3.7.0.1
Fair Value Measurements - Textuals (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Fair Value, Measurements, Nonrecurring [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gains or losses related to non-financial assets and liabilities $ 0 $ 0 $ 0 $ 0