Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of Realized Gain (Loss)

The cost of securities sold was determined using the specific identification method.

	Three Months Ended March 31,
	2016
Proceeds from sales and maturities of securities	$	26,859
Gross realized gains	61
Gross realized losses	(9		)