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Employee Benefit Plans (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
401(k) Plan [Member]
Description of plan	401(k) Plan.
Deferral rate	5.00%
Percent of annual salary employees may contribute	15.00%
Percent matched by company up to 3 percent of employee salary	100.00%
Percent matched by company 3-5 percent of employee salary	50.00%
Matching contributions	$ 1,400,000	$ 1,400,000	$ 1,400,000
Pension Plan [Member]
Description of plan	Historically, the Company offered a noncontributory defined benefit retirement plan (the “Pension Plan”) that qualified under Section 401(a) of the Internal Revenue Code. The Pension Plan provided for a monthly payment, at normal retirement age of 65, equal to one-twelfth of the sum of (i) 0.75% of Final Average Annual Compensation (5 highest consecutive calendar years' earnings out of the last 10 years of employment) multiplied by the employee's years of service not in excess of 40 years, and (ii) 0.65% of Final Average Annual Compensation in excess of the average social security wage base multiplied by years of service not in excess of 35 years. Benefits were fully vested after five years of service. Effective December 31, 2012, the Company froze the Pension Plan for all participants.
Accumulated benefit obligation	$ 36,164,000	35,615,000	30,548,000
Expected average annual rate of return, minimum	7.00%
Expected average annual rate of return, maximum	10.00%
Pension Plan [Member] | Equities [Member]
Pension plans allocated assets (percentage)	75.00%
Pension Plan [Member] | Fixed Income [Member]
Pension plans allocated assets (percentage)	25.00%
SERP [Member]
Description of plan	The purpose of the SERP was to provide additional monthly pension benefits to ensure that each such senior management executive would receive lifetime monthly pension benefits equal to 3% of his or her final average compensation multiplied by his or her years of service (maximum of 20 years) to the Company or its subsidiaries, subject to a maximum of 60% of his or her final average compensation.  The amount of a participant's monthly SERP benefit is reduced by (i) the amount payable under the Company's qualified Pension Plan (described above), and (ii) 50% of the participant's primary social security benefit.  Final average compensation means the average of the 5 highest consecutive calendar years of earnings during the last 10 years of service prior to termination of employment.  The SERP is an unfunded plan.  Payments are made from the general assets of the Company.
Accumulated benefit obligation	$ 5,778,000	$ 5,216,000	$ 5,292,000

X

- Definition

The automatic rate of deferral for employees enrolled in a defined contribution plan.

+ References

No definition available.

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- Definition

The maximum expected average annual rate of return on investments.

+ References

No definition available.

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- Definition

The minimum expected average annual rate of return on investments.

+ References

No definition available.

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- Definition

The amount matched by the company under a defined contribution plan.

+ References

No definition available.

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- Definition

The percent matched by company in the range of 3 to 5 percent of employee salary.

+ References

No definition available.

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- Definition

The percent matched by company up to 3 percent of employee salary for the defined contribution plan.

+ References

No definition available.

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- Definition

The percentage amount of annual salary employees may contribute to the defined contribution plan.

+ References

No definition available.

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- Definition

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accumulated Benefit Obligation
-URI http://asc.fasb.org/extlink&oid=6503844

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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- Definition

Description of the terms and benefits provided by the employer's defined contribution plans. A defined contribution plan provides benefits in return for services rendered, provides an individual account for each participant, and has terms that specify how contributions to the individual's account are to be determined rather than the amount of benefits the individual is to receive. Under a defined contribution pension plan, the benefits a participant will receive depend solely on the amount contributed to the participant's account, the returns earned on investments of those contributions, and forfeitures of other participants' benefits that may be allocated to such participant's account. A description of the plan(s) including employee groups covered, the basis for determining contributions, and the nature and effects of significant matters affecting comparability of information for all periods presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Defined Contribution Plan
-URI http://asc.fasb.org/extlink&oid=49180617

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