Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2015

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

Share-based payments recorded in salaries and benefits expense are as follows:

	Year Ended December 31,
	2015		2014		2013
	(In thousands)
Stock option and ESPP expense	$	518	$	653	$	987
Nonvested share expense	5,723		5,339		4,747
Subtotal	6,241		5,992		5,734
Tax benefit	2,367		2,311		2,210
Stock-based compensation expense, net of tax benefit	$	3,874	$	3,681	$	3,524

Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

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

A summary of option activity under the 2009 Plan for the year ended December 31, 2015 is as follows:

	Shares	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term in Years	Aggregate Intrinsic Value (in 000’s)
Outstanding at December 31, 2014	1,634,302	$	17.10
Granted	—	$	—
Exercised	159,219	$	8.16
Forfeited	2,852	$	9.05
Expired	249,280	$	26.98
Outstanding at December 31, 2015	1,222,951	$	16.27	2.52 years	$	2,520.1
Exercisable at December 31, 2015	1,222,951	$	16.27	2.52 years	$	2,520.1

Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

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

A summary of the Company’s nonvested shares as of December 31, 2015 and changes during the year ended December 31, 2015, including shares under both the 2009 Plan and the Inducement Plan, is as follows:

	Shares	Weighted- Average Grant-Date Fair Value
Nonvested at December 31, 2014	2,542,035	$	10.76
Granted	738,025	$	12.41
Vested	614,285	$	8.68
Forfeited	429,392	$	11.53
Nonvested at December 31, 2015	2,236,383	$	11.72