A reconciliation of the numerators and denominators used in the basic and diluted per-share computations is presented as follows for each class of common stock:



	Three months ended September 30,
	2018					2017
(dollars in thousands, except per share data)	Allocated net income (numerator)		Weighted shares (denominator)	Per-share amount		Allocated net income (numerator)		Weighted shares (denominator)	Per-share amount
Class A – Basic EPS:
Income available to Class A stockholders	$	79,787	46,188,941	$	1.73	$	58,064	46,188,949	$	1.26
Dilutive effect of stock-based awards	0		27,697	—		0		27,127	—
Assumed conversion of Class B shares	659		6,100,800	—		479		6,100,800	—
Class A – Diluted EPS:
Income available to Class A stockholders on Class A equivalent shares	$	80,446	52,317,438	$	1.54	$	58,543	52,316,876	$	1.12
Class B – Basic EPS:
Income available to Class B stockholders	$	659	2,542	$	259	$	479	2,542	$	189
Class B – Diluted EPS:
Income available to Class B stockholders	$	658	2,542	$	259	$	479	2,542	$	189



	Nine months ended September 30,
	2018					2017
(dollars in thousands, except per share data)	Allocated net income (numerator)		Weighted shares (denominator)	Per-share amount		Allocated net income (numerator)		Weighted shares (denominator)	Per-share amount
Class A – Basic EPS:
Income available to Class A stockholders	$	224,060	46,188,522	$	4.85	$	163,596	46,186,109	$	3.54
Dilutive effect of stock-based awards	0		24,320	—		0		55,541	—
Assumed conversion of Class B shares	1,850		6,100,800	—		1,350		6,100,800	—
Class A – Diluted EPS:
Income available to Class A stockholders on Class A equivalent shares	$	225,910	52,313,642	$	4.32	$	164,946	52,342,450	$	3.15
Class B – Basic EPS:
Income available to Class B stockholders	$	1,850	2,542	$	728	$	1,350	2,542	$	531
Class B – Diluted EPS:
Income available to Class B stockholders	$	1,849	2,542	$	727	$	1,350	2,542	$	531