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Interest Rate Swap (Tables)
 12 Months Ended
Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Assets at Fair Value [Table Text Block]
The amounts measured at fair value related to the Company’s interest rate swap, excluding accrued interest, were as follows (in thousands):
 
Balance Sheet Location
 
2016
 
2015
 
2014
Interest rate swap (short-term portion)
Other accrued expenses
 
$
(398
)
 
$
—

 
$
—

Interest rate swap (long-term portion)
Other assets
 
3,215

 
—

 
—

Total net asset
 
 
$
2,817

 
$
—

 
$
—
Derivative Instruments, Gain (Loss) [Table Text Block]
The following table summarizes the impact of taxes affecting AOCI as a result of the interest rate swap (in thousands):
 
 
2016
 
2015
 
2014
Income tax expense of interest rate swap on AOCI
 
$
891

 
$
—

 
$
—

The following table summarizes the impact of pre-tax gains and losses derived from the interest rate swap (in thousands):
 
Financial Statement Location
 
2016
 
2015
 
2014
Effective portion of gains recognized in OCI during the period
Other comprehensive income
 
$
2,283

 
$
—

 
$
—

Amounts reclassified from AOCI into earnings
Interest expense, net
 
—

 
—

 
—

Ineffective portion of gains recognized in earnings during the period
Interest expense, net
 
534

 
—

 
—

The following table summarizes the changes in AOCI, net of tax, related to the Company’s interest rate swaps (in thousands):
 
 
2016
 
2015
 
2014
Beginning fiscal year AOCI balance
 
$
—

 
$
—

 
$
—

Gain recognized in OCI
 
1,392

 
—

 
—

Amounts reclassified from AOCI into earnings
 
—

 
—

 
—

Other comprehensive gain, net of tax
 
1,392

 
—

 
—

Ending fiscal year AOCI balance
 
$
1,392

 
$
—

 
$
—