Supplementary Financial Data

12 Months Ended

Dec. 31, 2015

Supplementary Financial Data [Abstract]

Additional Financial Information Disclosure [Text Block]

Supplementary Financial Data

The following tables set forth our selected consolidated financial and operating data for the quarterly periods indicated.

	December 31, 2015		September 30, 2015		June 30, 2015		March 31, 2015
(In thousands, except per share amounts)	(Unaudited)		(Unaudited)		(Unaudited)		(Unaudited)
Revenue	$	468,923	$	363,457	$	322,856	$	263,159
Gross margin	$	94,816	$	78,041	$	70,261	$	56,976
Net income to common shareholders	$	12,056	$	14,352	$	12,131	$	8,349
Earnings per common share:
Basic	$	0.49	$	0.58	$	0.49	$	0.34
Diluted	$	0.43	$	0.51	$	0.43	$	0.31
Weighted average common shares outstanding:
Basic	24,649		24,605		24,531		24,514
Diluted	30,107		30,067		30,023		29,975
	December 31, 2014		September 30, 2014		June 30, 2014		March 31, 2014
(In thousands, except per share amounts)	(Unaudited)		(Unaudited)		(Unaudited)		(Unaudited)
Revenue	$	367,964	$	330,767	$	281,608	$	234,841
Gross margin	$	73,759	$	68,509	$	59,587	$	50,877
Net income to common shareholders	$	9,767	$	12,399	$	12,335	$	11,413
Earnings per common share:
Basic	$	0.40	$	0.51	$	0.50	$	0.47
Diluted	$	0.36	$	0.44	$	0.44	$	0.41
Weighted average common shares outstanding:
Basic	24,489		24,474		24,470		24,417
Diluted	29,944		29,921		29,913		29,870