Stockholders' Equity and Earnings Per Share ("EPS") (Tables)

9 Months Ended

Sep. 30, 2011

Reconciliation of Basic EPS to Diluted EPS

The following is a reconciliation of basic EPS to diluted EPS for the three and nine months ended September 30, 2011 and 2010, respectively:

	Three months  ended September 30,				Nine months  ended September 30,
(Dollars and shares in thousands, except per share amounts)	2011		2010		2011		2010
Numerator:
Net income available to common stockholders	$	37,571	$	37,787	$	136,328	$	77,464
Denominator:
Weighted average common shares outstanding-basic		43,233		41,930		42,882		41,679
Weighted average effect of dilutive securities:
Stock options and ESPP		452		511		610		652
Restricted stock units		106		72		122		70
3.875% Convertible Notes		—		—		27		—
Denominator for diluted calculation		43,791		42,513		43,641		42,401
Earnings per common share:
Basic	$	0.87	$	0.90	$	3.18	$	1.86
Diluted	$	0.86	$	0.89	$	3.12	$	1.83

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

The following table summarizes the common shares excluded from the diluted EPS calculation as they were deemed to be anti-dilutive for the three and nine months ended September 30, 2011 and 2010, respectively:

	Three months  ended September 30,				Nine months  ended September 30,
(Shares in thousands)	2011		2010		2011		2010
Stock options		337		6		239		8
Restricted stock units		10		5		134		4
Total		347		11		373		12