Debt Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of Debt Obligations and Undrawn Letters of Credit Outstanding

Debt obligations and undrawn letters of credit outstanding at year-end were as follows:

	2015			2014
Outstanding loans under unsecured revolving credit facility	$	350,000		90,000
Note	15,000			—
Total debt	365,000			90,000
Less: Current portion of debt	(62,050		)	(90,000	)
Long-term debt	$	302,950		—
Undrawn letters of credit under unsecured revolving credit facility - face amount	$	36,266		37,315

Schedule of Annual Maturities of Note

Annual maturities of the note are as follows:

	Total
2016	$	5,000
2017	10,000
	$	15,000