Debt (Tables)

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt consisted of the following:

	March 31,		December 31,
	2015		2014
Loan Agreement	$	105,307	$	137,109
4.67% Senior Unsecured Notes due 2021	40,000		40,000
5.25% Senior Unsecured Notes due 2024	11,000		11,000
5.30% Senior Unsecured Notes due 2024	29,000		29,000
5.45% Senior Unsecured Notes due 2026	20,000		20,000
	205,307		237,109
Less unamortized deferred financing fees	636		680
	$	204,671	$	236,429