Note 14 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Note 14 - Stock-based Compensation (Tables) [Line Items]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Year Ended December 31,
	2014		2013		2012
	(Dollars in thousands, except per share data)
Cost of revenues	$	3,076	$	3,971	$	4,225
Selling and marketing expenses		261		494		542
General and administrative expenses		2,234		1,799		1,611
Total stock-based compensation expense		5,571		6,264		6,378
Tax effect on stock-based compensation expense		836		783		797
Net effect of stock-based compensation expense	$	4,735	$	5,481	$	5,581

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year Ended December 31,
	2014			2013			2012
For stock options issued by the Company:
Risk-free interest rates		1.7	%		0.8	%		1.0	%
Expected lives (in years)		5.1			4.6			5.0
Dividend yield		0.9	%		0.71	%		0.81	%
Expected volatility		35.1	%		37.8	%		47.2	%
Forfeiture rate		0.0	%		5.6	%		6.4	%

Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]

	Year Ended December 31,
	2014					2013					2012
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding at beginning of year		4,710		$	28.23		3,563		$	30.09		2,934		$	32.40
Granted, at fair value:
Stock Options		485			29.05		45			26.70		75			19.01
SARs*		—			—		1,270			23.08		602			20.13
Exercised		(243	)		24.10		(39	)		16.89		—			—
Forfeited		(116	)		23.20		(114	)		30.04		(48	)		28.92
Expired		(359	)		42.70		(15.00	)		37.90		—			—
Outstanding at end of year		4,477			27.48		4,710			28.23		3,563			30.09
Options and SARs exercisable at end of year		2,106			31.25		2,123			33.82		1,592			36.61
Weighted-average fair value of options and SARs granted during the year				$	9.00				$	6.66				$	7.25

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

		Options Outstanding						Options Exercisable
Exercise Price		Number of Shares Outstanding		Weighted Average Remaining Contractual Life in Years		Aggregate Intrinsic Value		Number of Shares Exercisable		Weighted Average Remaining Contractual Life in Years		Aggregate Intrinsic Value
$	15.00		-			$	-		-		-	$	-
	18.56		45		4.8		388		45		4.8		389
	19.10		8		3.8		61		8		3.8		182
	19.69		26		4.6		197		26		4.6		197
	20.13		509		4.3		3,585		99		4.3		-
	20.54		100		4.3		664		25		4.3		-
	23.34		1,129		4.4		4,343		-		-		-
	24.57		33		4.1		85		-		-
	25.65		493		3.3		754		220		3.3		225
	25.74		8		0.8		11		8		0.8		33
	26.70		45		5.8		22		45		5.8		-
	26.84		418		1.2		142		418		1.2		196
	28.19		30		2.8		-		30		2.8		-
	28.23		53		6.8		-		-		-
	29.21		8		2.3		-		8		2.3		-
	29.52		400		5.6		-		-		-
	29.95		538		2.3		-		538		2.3		-
	34.13		222		1.3		-		222		1.3		-
	38.50		23		1.8		-		23		1.8		-
	45.78		390		0.3		-		390		0.3		-
			4,477		3.3		10,252		2,106		2.1		1,222

		Options Outstanding						Options Exercisable
Exercise Price		Number of Shares Outstanding		Weighted Average Remaining Contractual Life in Years		Aggregate Intrinsic Value		Number of Shares Exercisable		Weighted Average Remaining Contractual Life in Years		Aggregate Intrinsic Value
$	15.00		21		.8	$	258		21		.8	$	258
	18.56		45		5.8		389		45		5.8		389
	19.10		23		4.8		182		23		4.8		182
	19.69		26		5.6		197		26		5.6		197
	20.13		578		5.3		4,089		-		-		-
	20.54		120		5.3		800		-		-		-
	23.34		1,138		5.4		4,404		-		-		-
	25.65		578		4.3		901		144		4.3		225
	25.74		23		1.8		33		23		-		33
	26.70		45		6.8		23		-		-		-
	26.84		529		2.2		196		529		2.2		196
	28.19		30		3.8		-		30		3.8		-
	29.21		8		3.3		-		8		3.3		-
	29.95		547		3.3		-		273		3.3		-
	34.13		222		2.3		-		222		2.3		-
	38.50		23		2.8		-		23		2.8		-
	38.85		8		.2		-		8		.2		-
	42.08		329		.3		-		329		.3		-
	45.78		397		1.3		-		397		-		-
	52.98		23		.8		-		23		.8		-
			4,710		3.7		11,472		2,123		2.1		1,480

Chief Financial Officer [Member]

Note 14 - Stock-based Compensation (Tables) [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Risk-free interest rates	0.81	%
Expected life (in years)	3.375
Dividend yield	0.80	%
Expected volatility	33.50	%
Forfeiture rate	0.00	%

Risk-free interest rates	1.30	%
Expected life (in years)	4.0
Dividend yield	0.70	%
Expected volatility	32.40	%
Forfeiture rate	0.00	%

Chief Executive Officer [Member]

Note 14 - Stock-based Compensation (Tables) [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Grant of options to purchase 100,000 shares of common stock			Grant of options to purchase 300,000 shares of common stock
Risk-free interest rates		2.36	%		1.64	%
Expected life (in years)		7.25			4.75
Dividend yield		0.90	%		0.90	%
Expected volatility		42.80	%		33.10	%
Forfeiture rate		0	%		0	%