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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of Reconciliation of Earnings Per Share



2017		Income				Shares			Per Share
($ in thousands, except per share amounts)		(Numerator)				(Denominator)			Amount
Basic EPS:
Net income available to common stockholders		$	168,826			58,458			$	2.89

Effect of dilutive securities:
Stock compensation plans		—				899

Diluted EPS:
Net income available to common stockholders		$	168,826			59,357			$	2.84



2016		Income				Shares			Per Share
($ in thousands, except per share amounts)		(Numerator)				(Denominator)			Amount
Basic EPS:
Net income available to common stockholders		$	158,495			57,889			$	2.74

Effect of dilutive securities:
Stock compensation plans		—				858

Diluted EPS:
Net income available to common stockholders		$	158,495			58,747			$	2.70



2015		Income				Shares			Per Share
($ in thousands, except per share amounts)		(Numerator)				(Denominator)			Amount
Basic EPS:
Net income available to common stockholders		$	165,861			57,212			$	2.90

Effect of dilutive securities:
Stock compensation plans		—				944

Diluted EPS:
Net income available to common stockholders		$	165,861			58,156			$	2.85