Other Assets (Tables)

12 Months Ended

Dec. 31, 2014

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Company's Other Assets

The following table summarizes the Company’s other assets at December 31.

	2014		2013
	(Thousands of dollars)
Deposits on future purchases of aircraft	$	8,305	$	12,863
Deferred financing cost		5,246		3,196
Investments (Officers’ Deferred Compensation Plan)		2,386		2,109
Other		316		340
Total	$	16,253	$	18,508