Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2017
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Standards FASB ASU 2016 - 09, Improvements to Employee Share-Based Payment Accounting, was issued March 30, 2016. The provisions of the new standard changes several aspects of the accounting for share-based payment award transactions, including: (1) Accounting and Cash Flow Classification for Excess Tax Benefits, (2) Forfeitures, and (3) Tax Withholding Requirements and Cash Flow Classification. The Company adopted the ASU provisions effective January 1, 2017, which has the potential to create volatility in the book tax provision at the time nonqualified stock options are exercised or expire. During the first quarter 2017, 376 thousand shares were issued due to the exercise of nonqualified stock options resulting in a tax deduction exceeding related share based compensation by $1.6 million. First quarter 2017 income tax provision was $671 thousand lower than would have been under accounting standards prior to the adoption of ASU 2016 - 09. The Company elected to account for forfeitures as they occur. Recently Issued Accounting Standards FASB Accounting Standards Update (ASU) 2016 - 01 , Financial Instruments – Overall (Subtopic 825 - 10): Recognition and Measurement of Financial Assets and Financial Liabilities, was issued January 2016. The ASU addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Most notably, the ASU changes the income statement impact of equity investments held by the Company and the requirement for the Company to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The Company will be required to adopt the ASU provisions on January 1, 2018. Management is evaluating the impact that the ASU will have on the Company’s financial statements. FASB Accounting Standards Update (ASU) 2016 - 02, Leases (Topic 842), was issued February 25, 2016. The provisions of the new standard require lessees to recognize most leases on-balance sheet, increasing reported assets and liabilities. Lessor accounting remains substantially similar to current U.S. GAAP. The Company will be required to adopt the ASU provisions January 1, 2019, utilizing the modified retrospective transition approach. Management is evaluating the impact that the ASU will have on the Company’s financial statements. FASB ASU 2016 - 13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, was issued on June 16, 2016. The ASU significantly changes estimates for credit losses related to financial assets measured at amortized cost and certain other contracts. For estimating credit losses, the FASB is replacing the incurred loss model with the current expected credit loss (CECL) model, which will accelerate recognition of credit losses. Additionally, credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses under the new standard. The Company will also be required to provide additional disclosures related to the financial assets within the scope of the new standard. The Company will be required to adopt the ASU provisions on January 1, 2020. Management is evaluating the impact that the ASU will have on the Company’s consolidated financial statements. FASB ASU 2017 - 08 , Receivables – Non-Refundable Fees and Other Costs (Subtopic 310 - 20): Premium Amortization on Purchased Callable Debt Securities , was issued March 2017. The ASU will shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The Company will be required to adopt the ASU provisions on January 1, 2019. Management is evaluating the impact the ASU will have on the Company’s financial statements.

Recently Adopted Accounting Standards

FASB ASU

2016

09,

Improvements to Employee Share-Based Payment Accounting,

was issued

March

30,

2016.

The provisions of the new standard changes several aspects of the accounting for share-based payment award transactions, including:

(1)

Accounting and Cash Flow Classification for Excess Tax Benefits,

(2)

Forfeitures, and

(3)

Tax Withholding Requirements and Cash Flow Classification. The Company adopted the ASU provisions effective

January

2017,

which has the potential to create volatility in the book tax provision at the time nonqualified stock options are exercised or expire. During the

first

quarter

2017,

376

thousand shares were issued due to the exercise of nonqualified stock options resulting in a tax deduction exceeding related share based compensation by

$1.6

million. First quarter

2017

income tax provision was

$671

thousand lower than would have been under accounting standards prior to the adoption of ASU

2016

09.

The Company elected to account for forfeitures as they occur.

Recently Issued Accounting Standards

FASB Accounting Standards Update (ASU)

2016

Financial Instruments – Overall (Subtopic

825

10):

Recognition and Measurement of Financial Assets and Financial Liabilities,

was issued

January

2016.

The ASU addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Most notably, the ASU changes the income statement impact of equity investments held by the Company and the requirement for the Company to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes.

The Company will be required to adopt the ASU provisions on

January

2018.

Management is evaluating the impact that the ASU will have on the Company’s financial statements.

FASB Accounting Standards Update (ASU)

2016

02,

Leases (Topic

842),

was issued

February

25,

2016.

The provisions of the new standard require lessees to recognize most leases on-balance sheet, increasing reported assets and liabilities. Lessor accounting remains substantially similar to current U.S. GAAP.

The Company will be required to adopt the ASU provisions

January

2019,

utilizing the modified retrospective transition approach. Management is evaluating the impact that the ASU will have on the Company’s financial statements.

FASB ASU

2016

13,

Financial Instruments – Credit Losses (Topic

326):

Measurement of Credit Losses on Financial Instruments,

was issued on

June

16,

2016.

The ASU significantly changes estimates for credit losses related to financial assets measured at amortized cost and certain other contracts. For estimating credit losses, the FASB is replacing the incurred loss model with the current expected credit loss (CECL) model, which will accelerate recognition of credit losses. Additionally, credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses under the new standard. The Company will also be required to provide additional disclosures related to the financial assets within the scope of the new standard.

The Company will be required to adopt the ASU provisions on

January

2020.

Management is evaluating the impact that the ASU will have on the Company’s consolidated financial statements.

FASB ASU

2017

Receivables – Non-Refundable Fees and Other Costs (Subtopic

310

20):

Premium Amortization on Purchased Callable Debt Securities

, was issued

March

2017.

The ASU will shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity.

The Company will be required to adopt the ASU provisions on

January

2019.

Management is evaluating the impact the ASU will have on the Company’s financial statements.