Stockholders' Equity and EPS (Tables)

12 Months Ended

Dec. 31, 2017

Equity and Earnings Per Share [Abstract]

Reclassification out of Accumulated Other Comprehensive Income

Accumulated Other Comprehensive (Loss) Income

The following table summarizes the items reclassified out of accumulated other comprehensive income into the Consolidated Statements of Income for 2017, 2016 and 2015:

		Year ended December 31,
(Dollars in thousands)	Income Statement Location	2017			2016			2015
Reclassification adjustment for losses (gains) included in net income	Gains on investment securities, net	$	5,189		$	(12,195	)	$	(1,201	)
Related tax (benefit) expense	Income tax expense	(2,098		)	4,963			481
Total reclassification adjustment for losses (gains) included in net income, net of tax		$	3,091		$	(7,232	)	$	(720	)

Reconciliation of Basic EPS to Diluted EPS

The following is a reconciliation of basic EPS to diluted EPS for 2017, 2016 and 2015:

	Year ended December 31,
(Dollars and shares in thousands, except per share amounts)	2017		2016		2015
Numerator:
Net income available to common stockholders	$	490,506	$	382,685	$	343,904
Denominator:
Weighted average common shares outstanding—basic	52,588		51,915		51,318
Weighted average effect of dilutive securities:
Stock options and ESPP	385		254		387
Restricted stock units	333		180		211
Weighted average common shares outstanding—diluted	53,306		52,349		51,916
Earnings per common share:
Basic	$	9.33	$	7.37	$	6.70
Diluted	9.20		7.31		6.62

Common Shares Excluded from Diluted EPS Calculation as They Were Deemed to be Anti-Dilutive

The following table summarizes the weighted average common shares excluded from the diluted EPS calculation due to the antidilutive effect for 2017, 2016 and 2015:

	Year ended December 31,
(Shares in thousands)	2017	2016	2015
Stock options	73	272	185
Restricted stock units	1	1	—
Total	74	273	185