CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Rental of flight equipment	$ 393,479	$ 358,114	$ 771,341	$ 712,767
Revenues	397,814	380,957	779,023	741,144
Expenses
Interest	73,452	63,014	142,395	130,077
Amortization of debt discounts and issuance costs	8,010	6,437	16,032	15,429
Interest expense	81,462	69,451	158,427	145,506
Depreciation of flight equipment	142,600	126,490	278,734	250,399
Selling, general and administrative	21,458	23,843	44,817	46,415
Stock-based compensation	4,885	5,304	8,317	9,077
Total expenses	250,405	225,088	490,295	451,397
Income before taxes	147,409	155,869	288,728	289,747
Income tax expense	(32,198)	(54,944)	(62,866)	(103,885)
Net income	$ 115,211	$ 100,925	$ 225,862	$ 185,862
Net income per share of Class A and Class B common stock:
Basic (in dollars per share)	$ 1.11	$ 0.98	$ 2.17	$ 1.80
Diluted (in dollars per share)	$ 1.04	$ 0.92	$ 2.04	$ 1.69
Weighted-average shares outstanding
Basic (in shares)	104,003,960	103,180,769	103,876,647	103,064,834
Diluted (in shares)	112,424,582	111,564,483	112,326,506	111,490,683
Dividends declared per share	$ 0.10	$ 0.075	$ 0.20	$ 0.15
Aircraft sales, trading and other
Revenues
Revenues	$ 4,335	$ 22,843	$ 7,682	$ 28,377