Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2016

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,
	2016		2015		2014
	(In thousands)
Stock option and ESPP expense	$	437	$	518	$	653
Nonvested share expense	6,293		5,723		5,339
Subtotal	6,730		6,241		5,992
Tax benefit	2,574		2,367		2,311
Stock-based compensation expense, net of tax benefit	$	4,156	$	3,874	$	3,681

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, 2016 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, 2015	1,222,951	$	16.27
Granted	—	$	—
Exercised	244,567	$	7.60
Forfeited	73,062	$	29.49
Expired	248,922	$	29.25
Outstanding at December 31, 2016	656,400	$	13.11	2.26 years	$	4,117.0
Exercisable at December 31, 2016	656,400	$	13.11	2.26 years	$	4,117.0

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, 2016 and changes during the year ended December 31, 2016, 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, 2015	2,236,383	$	11.72
Granted	599,673	$	11.58
Vested	490,658	$	10.90
Forfeited	351,770	$	10.18
Nonvested at December 31, 2016	1,993,628	$	12.16