Debt (Tables)

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Schedule of long-term debt instruments

The Company has long-term debt as follows:

	At December 31,
	2016		2015
In thousands
Revolving credit agreement	$	212,605	$	233,513
Term loan	91,250		96,250
Convertible notes	113,203		111,058
Total	417,058		440,821
Less current portion	120,078		5,000
Total excluding current portion	$	296,980	$	435,821

Schedule of maturities of long-term debt

The aggregate annual maturities of long-term debt for each of the next five years are approximately as follows:

In thousands
2017	$	121,875
2018	7,500
2019	9,375
2020	280,105
2021	—

Schedule of line of credit facilities

The following table shows the amounts available for borrowing under the Company's revolving credit facility:

	At December 31,
	2016		2015
In thousands
Total facility	$	600,000	$	600,000
Amounts outstanding, excluding letters of credit	212,605		233,513
Amounts available for borrowing, excluding letters of credit	387,395		366,487
Letters of credit under the credit facility	5,655		5,900
Amounts available for borrowing	$	381,740	$	360,587
Amounts available for borrowing subject to EBITDA	$	209,467	$	259,883

Interest Rate on Credit Facility [Table Text Block]

The interest rate for the outstanding amounts on both the revolving credit facility and term loan commitment are as follows:

	At December 31,
	2016		2015
Interest rate	2.19	%	1.67	%

Schedule of changes in conversion rate for convertible notes

The following table illustrates the conversion rate at each date:

	December 31, 2016		December 31, 2015
Convertible Notes
Conversion Rate per $1,000 principal amount (1)	29.9134		29.8059
Conversion Price (2)	$	33.4298	$	33.5504
Contingent Conversion Price (3)	$	43.46	$	43.62
Aggregate shares to be issued upon conversion (4)	3,440,045		3,427,679

⁽¹⁾ Represents the number of shares of Common Stock hypothetically issuable per $1,000 principal amount of Notes, subject to adjustments per the Convertible Note Indenture dated November 19, 2010. At the date the Company issued the Convertible Notes, the conversion rate initially equaled 29.4499 shares of common stock per $1,000 principal amount of notes (which is equivalent to an initial conversion price of approximately $33.96 per share of common stock). The conversion rate is subject to adjustment upon the occurrence of certain specified events, such as an increase in the dividend paid to shareholders.

⁽²⁾ Represents $1,000 divided by the conversion rate as of such date. The conversion price reflects the strike price of the embedded option within the Convertible Note. Were the Company's share price to exceed the conversion price at conversion the noteholders would be entitled to receive additional consideration either in cash, shares or a combination thereof, the form of which is at the sole discretion of the Company.

⁽³⁾ Prior to May 15, 2017, the notes are convertible only in the following circumstances: (1) during any fiscal quarter commencing after April 1, 2011, and only during any such fiscal quarter, if the last reported sale price of our common stock was greater than or equal to 130% of the applicable conversion price for at least 20 trading days (whether or not consecutive) during the 30 consecutive trading days ending on the last trading day of the previous fiscal quarter, (2) upon the occurrence of specified corporate transactions, or (3) during the five consecutive business-day period following any five consecutive trading-day period in which, for each day of that period, the trading price for the notes was less than 98% of the product of the last reported sale price of our common stock and the applicable conversion rate on such trading day. On and after May 15, 2017, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their notes at any time, regardless of the foregoing circumstances. Upon a change in control or termination of trading, holders of the notes may require us to repurchase all or a portion of their notes for cash at a repurchase price equal to 100% of the principal amount, plus any accrued and unpaid interest.

⁽⁴⁾ This represents the number of shares hypothetically issuable upon conversion of the principal balance of the Convertible Notes at each date; however, as the terms of the Convertible Notes require net share settlement, the aggregate principal amount of the notes will be paid in cash. Amounts due in excess of the principal, if any, may be settled in cash, shares of the Company's common stock or a combination of cash and shares of common stock, at the Company's election.

Schedule of stockholders' equity note, warrants or rights

The following table illustrates the warrant price at each date:

	December 31, 2016		December 31, 2015
Warrants
Warrant Price	$	43.72	$	43.87

Schedule of equity and liability components in convertible debt

The carrying amount of the equity component and the principal amount of the liability component, the unamortized discount and the net carrying value of the liability are as follows:

	December 31, 2016		December 31, 2015
In thousands
Principal amount of liability	$	115,000	$	115,000
Unamortized discount	1,797		3,942
Carrying value of liability	$	113,203	$	111,058
Equity component	$	13,329	$	13,329

Interest expense associated with convertible notes

Interest expense associated with the Convertible Notes consisted of the following:

	For the year ended December 31,
	2016		2015		2014
In thousands
Contractual coupon rate of interest	$	3,738	$	3,738	$	3,738
Accretion of convertible notes discount	2,144		2,035		1,931
Interest expense - convertible notes	$	5,882	$	5,773	$	5,669