Note 5 - Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

						Weighted-average		Aggregate
				Weighted-average		Remaining Contractual		Intrinsic
	Shares			Exercise Price		Life (in years)		Value (in thousands)
Balance, December 31, 2014		2,332,904		$	32.34		1.2	$	1,388
Exercised		(3,750	)		23.37
Forfeited		(808,670	)		35.63
Balance, March 31, 2015		1,520,484		$	30.62		1.6	$	3,156
Exercised		(69,600	)		23.37
Forfeited		(267,884	)		33.99
Balance, June 30, 2015		1,183,000		$	30.37		1.5	$	5,010
Exercisable, June 30, 2015		1,183,000		$	30.37		1.5	$	5,010

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Units
Balance at December 31, 2014		386,465
Granted		72,900
Vested		(24,892	)
Forfeited		(7,265	)
Balance at June 30, 2015		427,208

Schedule of Tax Benefit (Short-fall) from Share-based Payment Arrangements [Table Text Block]

	Three months ended June 30,						Six months ended June 30,
(Dollars in thousands)	2015			2014			2015			2014
Short-fall of tax deductions in excess of grant-date fair value	$	(1,224	)	$	50		$	(5,619	)	$	(1,177	)
Benefit of tax deductions on grant-date fair value		1,554			(50	)		6,146			1,177
Total benefit of tax deductions	$	330		$	-		$	527		$	-