Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Summary of the net income allocated to common shares and the basic and diluted shares used in the net income per share computations

The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:

	Year ended December 31,
	2015			2014			2013
	(in thousands)
Net income	$	39,390		$	28,004		$	32,032
Less distributed and undistributed earnings allocated to participating securities	(981		)	(2,002		)	(916		)
Net income allocated to common shares	$	38,409		$	26,002		$	31,116
Weighted average common shares outstanding	24,308			24,708			24,850
Incremental shares from assumed conversions of common stock options	7			4			22
Adjusted weighted average common shares outstanding	24,315			24,712			24,872
Potentially dilutive securities not included in weighted average share calculation due to anti-dilutive effect	—			4			8